Page 1

For New Technology Network

R

corporation

Ball and Roller Bearings

CAT. NO.

2202-(/E


Technical Data

A-

5

Deep Groove Ball Bearings

B-

5

Miniature and Extra Small Bearings

B- 31

Angular Contact Ball Bearings

B- 43

Self-Aligning Ball Bearings

B- 65

Cylindrical Roller Bearings

B- 77

Tapered Roller Bearings

B-119

Spherical Roller Bearings

B-219

Thrust Bearings

B-255

Locknuts, Lockwashers & Lockplates

C-

1

Catalog List & Appendix Table

D-

1


Warranty NTN warrants, to the original purchaser only, that the delivered product which is the subject of this sale (a) will conform to drawings and specifications mutually established in writing as applicable to the contract, and (b) be free from defects in material or fabrication. The duration of this warranty is one year from date of delivery. If the buyer discovers within this period a failure of the product to conform to drawings or specifications, or a defect in material or fabrication, it must promptly notify NTN in writing. In no event shall such notification be received by NTN later than 13 months from the date of delivery. Within a reasonable time after such notification, NTN will, at its option, (a) correct any failure of the product to conform to drawings, specifications or any defect in material or workmanship, with either replacement or repair of the product, or (b) refund, in part or in whole, the purchase price. Such replacement and repair, excluding charges for labor, is at NTN's expense. All warranty service will be performed at service centers designated by NTN. These remedies are the purchaser's exclusive remedies for breach of warranty. NTN does not warrant (a) any product, components or parts not manufactured by NTN, (b) defects caused by failure to provide a suitable installation environment for the product, (c) damage caused by use of the product for purposes other than those for which it was designed, (d) damage caused by disasters such as fire, flood, wind, and lightning, (e) damage caused by unauthorized attachments or modification, (f) damage during shipment, or (g) any other abuse or misuse by the purchaser. THE FOREGOING WARRANTIES ARE IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. In no case shall NTN be liable for any special, incidental, or consequential damages based upon breach of warranty, breach of contract, negligence, strict tort, or any other legal theory,and in no case shall total liability of NTN exceed the purchase price of the part upon which such liability is based. Such damages include, but are not limited to, loss of profits, loss of savings or revenue, loss of use of the product or any associated equipment, cost of capital, cost of any substitute equipment, facilities or services, downtime, the claims of third parties including customers, and injury to property. Some states do not allow limits on warranties, or on remedies for breach in certain transactions. In such states, the limits in this paragraph and in paragraph (2) shall apply to the extent allowable under case law and statutes in such states. Any action for breach of warranty or any other legal theory must be commenced within 15 months following delivery of the goods. Unless modified in a writing signed by both parties, this agreement is understood to be the complete and exclusive agreement between the parties, superceding all prior agreements, oral or written, and all other communications between the parties relating to the subject matter of this agreement. No employee of NTN or any other party is authorized to make any warranty in addition to those made in this agreement. This agreement allocates the risks of product failure between NTN and the purchaser. This allocation is recognized by both parties and is reflected in the price of the goods. The purchaser acknowledges that it has read this agreement, understands it, and is bound by its terms.

Š NTN Corporation. 2009 Although care has been taken to assure the accuracy of the data compiled in this catalog, NTN does not assume any liability to any company or person for errors or omissions.


Ball and Roller Bearings

CAD data of model numbers given in the catalog is available as an electronic catalog. For information, please contact NTN Engineering.


TECHNICAL DATA CONTENTS

1. Classification and Characteristics of Rolling Bearings ⋯⋯⋯⋯⋯⋯⋯⋯A-5

5. Boundary Dimensions and Bearing Number Codes ⋯⋯⋯⋯⋯A-30

1.1 Rolling bearing construction ⋯⋯⋯⋯⋯⋯A-5

5.1 Boundary dimensions ⋯⋯⋯⋯⋯⋯⋯⋯A-30

1.2 Classification of rolling bearings ⋯⋯⋯⋯A-5

5.2 Bearing numbers ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-31

1.3 Characteristics of rolling bearings ⋯⋯⋯A-8

6. Bearing Tolerances ⋯⋯⋯⋯⋯⋯⋯A-35 2. Bearing Selection ⋯⋯⋯⋯⋯⋯⋯⋯A-12

6.1 Dimensional accuracy and running accuracy ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-35

2.1 Bearing selection flow chart ⋯⋯⋯⋯⋯A-12

6.2 Chamfer measurements and tolerance or allowable values of tapered bore ⋯⋯A-46

2.2 Type and characteristics ⋯⋯⋯⋯⋯⋯⋯A-14 2.3 Selection of bearing arrangement ⋯⋯⋯A-15

6.3 Bearing tolerance measurement methods ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-48

3. Load Rating and Life ⋯⋯⋯⋯⋯⋯A-17 3.1 Bearing life⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-17

7. Bearing Fits ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-49

3.2 Basic rating life and basic dynamic load rating ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-17

7.1 Fitting ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-49 7.2 The necessity of a proper fit ⋯⋯⋯⋯⋯A-49

3.3 Adjusted rating life ⋯⋯⋯⋯⋯⋯⋯⋯⋯A-18

7.3 Fit selection ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-49

3.4 Machine applications and requisite life ⋯A-19 3.5 Basic static load rating⋯⋯⋯⋯⋯⋯⋯⋯A-19 3.6 Allowable static equivalent load ⋯⋯⋯⋯A-20

8. Bearing Internal Clearance and Preload ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-58 8.1 Bearing internal clearance ⋯⋯⋯⋯⋯⋯A-58

4. Bearing Load Calculation ⋯⋯⋯⋯A-21

8.2 Internal clearance selection ⋯⋯⋯⋯⋯A-58

4.1 Loads acting on shafts⋯⋯⋯⋯⋯⋯⋯⋯A-21

8.3 Preload ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-66

4.2 Bearing load distribution ⋯⋯⋯⋯⋯⋯⋯A-23 4.3 Mean load ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-24 4.4 Equivalent load ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-25

9. Allowable Speed ⋯⋯⋯⋯⋯⋯⋯⋯⋯A-70

4.5 Bearing rating life and load calculation examples ⋯⋯⋯⋯⋯⋯A-27

A-2


14.3 Shaft and housing accuracy ⋯⋯⋯⋯⋯A-87

10. Friction and Temperature Rise⋯⋯⋯⋯⋯⋯⋯⋯A-71

14.4 Allowable bearing misalignment ⋯⋯⋯A-87

10.1 Friction ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-71 10.2 Temperature rise⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-71

15. Bearing Handling ⋯⋯⋯⋯⋯⋯⋯⋯A-88 15.1 Bearing storage ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-88

11. Lubrication ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-72

15.2 Installation ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-88

11.1 Purpose of lubrication ⋯⋯⋯⋯⋯⋯⋯A-72

15.3 Internal clearance adjustment ⋯⋯⋯⋯A-90

11.2 Lubrication methods and characteristics ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-72

15.4 Post installation running test⋯⋯⋯⋯⋯A-92 15.5 Bearing disassembly ⋯⋯⋯⋯⋯⋯⋯⋯A-92

11.3 Grease lubrication ⋯⋯⋯⋯⋯⋯⋯⋯⋯A-72

15.6 Bearing maintenance and inspection ⋯A-94

11.4 Solid grease (For bearings with solid grease) ⋯⋯⋯A-76 11.5 Oil lubrication ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-77

16. Bearing Damage and Corrective Measures ⋯⋯⋯⋯⋯⋯A-96

12. External bearing sealing devices ⋯⋯⋯⋯⋯⋯⋯⋯⋯A-80

17. Technical data ⋯⋯⋯⋯⋯⋯⋯⋯⋯A-100

13. Bearing Materials ⋯⋯⋯⋯⋯⋯⋯⋯A-83

17.1 Deep groove ball bearing radial internal clearances and axial internal clearances ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-100

13.1 Raceway and rolling element materials ⋯⋯⋯⋯⋯⋯A-83

17.2 Angular contact ball bearing axial load and axial displacement ⋯⋯⋯⋯⋯⋯⋯⋯A-100

13.2 Cage materials⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯A-83

17.3 Tapered roller bearing axial load and axial displacement ⋯⋯⋯⋯⋯⋯⋯⋯A-102 17.4 Allowable axial load for ball bearings A-102

14. Shaft and Housing Design⋯⋯⋯A-85

17.5 Fitting surface pressure ⋯⋯⋯⋯⋯⋯A-103

14.1 Fixing of bearings ⋯⋯⋯⋯⋯⋯⋯⋯⋯A-85

17.6 Necessary press fit and pullout force A-104

14.2 Bearing fitting dimensions⋯⋯⋯⋯⋯⋯A-86

A-3


â—?Classification and Characteristics of Rolling Bearings 1. Classification and Characteristics of Rolling Bearings 1.1 Rolling bearing construction Most rolling bearings consist of rings with raceway (inner ring and outer ring), rolling elements (either balls or rollers) and cage. The cage separates the rolling elements at regular intervals, holds them in place within the inner and outer raceways, and allows them to rotate freely.

Outer ring

Outer ring

Inner ring

Inner ring

Cage Ball

1)

Raceway (inner ring and outer ring) or raceway washer The surface on which rolling elements roll is called the "raceway surface". The load placed on the bearing is supported by this contact surface. Generally the inner ring fits on the axle or shaft and the outer ring on the housing.

Deep groove ball bearing Fig A

Ball Cage

Angular contact ball bearing Fig.B

Note 1: The raceway of thrust bearing is called "raceway washer," the inner ring is called the "shaft raceway washer" and the outer ring is called the "housing raceway washer."

Rolling elements Rolling elements classify in two types: balls and rollers. Rollers come in four types: cylindrical, needle, tapered, and spherical. Balls geometrically contact with the raceway surfaces of the inner and outer rings at "points", while the contact surface of rollers is a "line" contact. Theoretically, rolling bearings are so constructed as to allow the rolling elements to rotate orbitally while also rotating on their own axes at the same time.

Outer ring

Outer ring

Inner ring

Roller

Cage

Cage

Roller

Cylindrical roller bearing Fig. C

Cages Cages function to maintain rolling elements at a uniform pitch so load is never applied directly to the cage and to prevent the rolling elements from falling out when handling the bearing. Types of cages differ according to way they are manufactured, and include pressed, machined and formed cages.

Needle roller bearing Fig. D

Outer ring

Outer ring Roller

Inner ring

Cage

1.2 Classification of rolling bearings

Roller Cage

Inner ring

Rolling bearings divide into two main classifications: ball bearings and roller bearings. Ball bearings are classified according to their bearing ring configurations: deep groove type and angular contact type. Roller bearings on the other hand are classified according to the shape of the rollers: cylindrical, needle, tapered and spherical.

Tapered roller bearing Fig. E

Rolling bearings can be further classified according to the direction in which the load is applied; radial bearings carry radial loads and thrust bearings carry axial loads.

Shaft raceway washer

Spherical roller bearing Fig. F

Shaft raceway washer

Roller

Ball

Other classification methods include: 1) number of rolling rows (single, double, or 4-row), 2) separable and non-separable, in which either the inner ring or the outer ring can be detached. Cage

There are also bearings designed for special applications, such as: railway car journal roller bearings, ball screw support bearings, turntable bearings, as well as linear motion bearings (linear ball bearings, linear roller bearings and linear flat roller bearings).Types of rolling bearings are given in Fig. 1.2.

Cage

Housing raceway washer Thrust ball bearing Fig. G

Housing raceway washer Thrust roller bearing Fig. H

Fig. 1.1 Rolling bearing

A-5


●Classification and Characteristics of Rolling Bearings

Single row deep groove ball bearings …B- 5 Single row angular contact ball bearings …B-43 Duplex angular contact ball bearings …B-46

Radial ball bearings

Four-point contact ball bearings ………B-58 Double row angular contact ball bearings …B-60 Self-aligning ball bearings ………………B-65

Ball bearings Ball bearings for rolling bearing unit*

Single direction thrust ball bearings …B-255 Double direction angular contact thrust ball bearings*

Thrust ball bearings

High-speed duplex angular contact ball bearings (for axial loads)*

Rolling bearings

Single row cylindrical roller bearings …B- 77 Double row cylindrical roller bearings …B-102

Radial roller bearings

Needle roller bearings* Single row tapered roller bearings ……B-119 Double row tapered roller bearings ……B-184 Spherical roller bearings ………………B-219

Roller bearings Cylindrical roller thrust bearings* Needle roller thrust bearings*

Thrust roller bearings

Tapered roller thrust bearings* Spherical roller thrust bearings ………B-262

Fig. 1.2 Classification of rolling bearings

A-6


â—?Classification and Characteristics of Rolling Bearings

Ultra thin wall type ball bearings* Ball screw support bearings* Railway car journal roller bearings* Ultra-clean vacuum bearings* SL-type cylindrical roller bearings* Insulated bearings MEGAOHMTM series*

Special application bearings

Rubber molded bearings* Clearance adjusting needle roller bearings* Complex bearings* Connecting rod needle roller bearings with cage* Roller followers* Cam followers*

Linear ball bearings*

Linear motion bearings

Linear roller bearings* Linear flat roller bearings*

Note: Bearings marked with an asterisk are not contained in this catalog. For details, see the catalog devoted to the concerned type of bearing.

A-7


â—?Classification and Characteristics of Rolling Bearings

1.3.3 Radial and thrust bearings Almost all types of rolling bearings can carry both radial and axial loads at the same time. Generally, bearings with a contact angle of less than 45°have a much greater radial load capacity and are classed as radial bearings; whereas bearings which have a contact angle over 45°have a greater axial load capacity and are classed as thrust bearings. There are also bearings classed as complex bearings which combine the loading characteristics of both radial and thrust bearings.

1.3 Characteristics of rolling bearings 1.3.1 Characteristics of rolling bearings Rolling bearings come in many shapes and varieties, each with its own distinctive features. However, when compared with sliding bearings, rolling bearings all have the following advantages: (1) The starting friction coefficient is lower and there is little difference between this and the dynamic friction coefficient. (2) They are internationally standardized, interchangeable and readily obtainable. (3) They are easy to lubricate and consume less lubricant. (4) As a general rule, one bearing can carry both radial and axial loads at the same time. (5) May be used in either high or low temperature applications. (6) Bearing rigidity can be improved by preloading.

1.3.4 Standard bearings and special bearings The boundary dimensions and shapes of bearings conforming to international standards are interchangeable and can be obtained easily and economically over the world over. It is therefore better to design mechanical equipment to use standard bearings. However, depending on the type of machine they are to be used in, and the expected application and function, a non-standard or specially designed bearing may be best to use. Bearings that are adapted to specific applications, and "unit bearings" which are integrated (built-in) into a machine's components, and other specially designed bearings are also available. The feature of typical standard bearings are as follows:

Construction, classes, and special features of rolling bearings are fully described in the boundary dimensions and bearing numbering system section. 1.3.2 Ball bearings and roller bearings Table 1.1 gives a comparison of ball bearings and roller bearings. Table 1.1 Comparison of ball bearings and roller bearings

The most common type of bearing, deep groove ball bearings are widely used in a variety of fields. Deep groove ball bearings include shield bearings and sealed bearings with grease make them easier to use. Deep groove ball bearings also include bearings with a locating snap-ring to facilitate positioning when mounting the outer ring, expansion compensating bearings which absorb dimension variation of the bearing fitting surface due to housing temperature, and TAB bearings that are able to withstand contamination in the lubricating oil.

2b

2b 2a

Deep groove ball bearings

Roller bearings

r

Point contact Linear contact Contact surface is oval when Contact surface is generally load is applied. rectangular when load is applied. Because of point contact there is little rolling resistance, ball bearings are suitable for low torque and high-speed applications. They also have superior acoustic characteristics.

Because of linear contact, rotational torque is higher for roller bearings than for ball bearings, but rigidity is also higher.

Load capacity is lower for ball bearings, but radial bearings are capable of bearing loads in both the radial and axial direction.

Load capacity is higher for rolling bearings. Cylindrical roller bearings equipped with a lip can bear slight radial loads. Combining tapered roller bearings in pairs enables the bearings to bear an axial load in both directions.

Table 1.2 Configuration of sealed ball bearings Type and symbol Configuration

Load capacity

Characteristics

Contact with raceway

Ball bearings

A-8

Shield Non-contact Non-contact ZZ LLB

Sealed Contact LLU

Low torque LLH


●Classification and Characteristics of Rolling Bearings

Angular contact ball bearings

Cylindrical roller bearings

The line that unites point of contact of the inner ring, ball and outer ring runs at a certain angle (contact angle) in the radial direction. Bearings are generally designed with three contact angles. Angular contact ball bearings can support an axial load, but cannot be used by single bearing because of the contact angle. They must instead be used in pairs or in combinations. Angular contact ball bearings include double row angular contact ball bearings for which the inner and outer rings are combined as a single unit. The contact angle of double row angular contact ball bearings is 25˚. There are also four-point contact bearings that can support an axial load in both directions by themselves. These bearings however require caution because problems such as excessive temperature rise and wearing could occur depending on the load conditions.

Uses rollers for rolling elements, and therefore has a high load capacity. The rollers are guided by the ribs of the inner or outer ring. The inner and outer rings can be separated to facilitate assembly, and both can be fit with shaft or housing tightly. If there is no ribs, either the inner or the outer ring can move freely in the axial direction. Cylindrical roller bearings are therefore ideal to be used as so-called "free side bearings" that absorb shaft expansion. In the case where there is a ribs, the bearing can bear a slight axial load between the end of the rollers and the ribs. Cylindrical roller bearings include the HT type which modifies the shape of roller end face and ribs for increasing axial road capacity. And the E type with a special internal design for enhancing radial load capacity. The E type is standardized for small-diameter sizes. Table 1.6 shows the basic configuration for cylindrical roller bearings.

Table 1.3 Contact angle and symbol

In addition to these, there are cylindrical roller bearings with multiple rows of rollers and the SL type of full complement roller bearing without cage.

Contact angle Contact angle and contact angle symbol Contact angle symbol

15° C

30° A

1)

Table 1.6 Types of cylindrical roller bearings

40° B

Type and Symbol

NU type N type

NJ type NF type

NUP type NH type (NJ+HJ)

Drawings

Contact angle

NU type

NJ type

NUP type

N type

NF type

NH type

Note 1: Contact angle symbol has been abbreviated as "A".

Table 1.4 Configuration of double row angular contact ball bearings Type

Open

Shield ZZ

Non-contact sealed LLM

Contact sealed LLD

Configuration

and symbol

Type and symbol

Back-to-back duplex DB

Configuration

Table 1.5 Combinations of duplex angular contact ball bearings

r

Face-to-face duplex DF

Tandem duplex DT

r

A-9


●Classification and Characteristics of Rolling Bearings

Tapered roller bearings

Spherical roller bearings

Tapered roller bearings are designed so the inner/outer ring raceway and apex of the tapered rollers intersect at one point on the bearing centerline. By receiving combined load from inner and outer ring, the rollers are pushed against the inner ring rib and roll guided with rib. Induced force is produced in the axial direction when a radial load is applied, so must be handled by using a pair of bearings. The inner ring with rollers and outer ring come apart, thus facilitating mounting with clearance or preload. Assembled clearance is however hard to manage and requires special attention. Tapered roller bearings are capable of supporting large loads in both the axial and radial directions. NTN bearings with 4T-, ET-, T- and U attached to the name conform to ISO and JIS standards for sub-unit dimensions (nominal contact angle, nominal small end diameter of outer ring) and are internationally interchangeable. NTN also has a line of case hardened steel bearings designed for longer life (ETA-, ET-, etc.). NTN tapered roller bearings also include bearings with two and four rows of tapered rollers for extra-heavy loads.

Equipped with an outer ring with a spherical raceway surface and an inner ring which holds two rows of barrelshaped rolling elements, NTN spherical roller bearings are able to adjust center alignment to handle inclination of the axle or shaft. There are variety of bearing types that differ according to internal design. Spherical roller bearings include as type equipped with an inner ring with a tapered bore. The bearing can easily be mounted on a shaft by means of an adapter or withdrawal sleeve. The bearing is capable of supporting heavy loads, and is therefore often used in industrial machinery. When heavy axial load is applied to the bearing, the load on rollers of another row is disappeared, and can cause problems. Attention must therefore be paid to operating conditions. Table 1.7 Types of spherical roller bearings Standard (B type)

C type

213 type

E type

Configuration

Type

Thrust bearings There are many types of thrust bearings that differ according to shape of rolling element and application. Allowable rotational speed is generally low and special attention must be paid to lubrication.

Sub-unit dimensions

In addition to the ones given below, there are various types of thrust bearings for special applications. For details, see the catalog devoted to the concerned type of bearing.

E

Table 1.8 Types of thrust bearings Type E : nominal small end diameter of outer ring α : Nominal contact angle

Single direction thrust ball bearing

Needle roller thrust bearing

AXK type

Fig. 1.3 Tapered roller bearings

Configuration

AS type raceway washer

GS/WS type raceway washer

Cylindrical roller thrust bearing

Spherical roller thrust bearing

Center alignment angle

A-10


â—?Classification and Characteristics of Rolling Bearings

Needle roller bearings

Bearing unit

Needle roller bearings use needle rollers as rolling elements. The needle rollers are a maximum of 5 mm in diameter and are 3 to 10 times as long as they are in diameter. Because the bearings use needle rollers as rolling elements, the cross-section is thin, but they have a high load capacity for their size. Because of the large number of rolling elements, the bearings have high rigidity and are ideally suited to wobbling or pivoting motion.

A unit comprised of a ball bearing inserted into various types of housings. The housing can be bolted onto machinery and the inner ring can be easily mounted on the shaft with a set screw. This means the bearing unit can support rotating equipment without special design to allow for mounting. A variety of standardized housing shapes is available, including pillow and flange types. The outer diameter of the bearing is spherical just like the inner diameter of the housing, so it capable of aligning itself on the shaft. For lubrication, grease is sealed inside the bearing, and particle generation is prevented by a double seal. For details, see the catalog devoted to the concerned type of bearing.

There is a profusion of types of needle roller bearings, and just a few of the most representative types are covered here. For details, see the catalog devoted to the concerned type of bearing. Table 1.9 Main types of needle roller bearings Type

Needle roller bearing with cage

Grease fitting Ball

Housing Spherical outer ring

Solid type needle roller bearings

Slinger

Configuration

Special rubber seal

Setscrew with ball

Shell type needle roller bearings

Fig. 1.4 Oil-lubricated bearing unit Roller follower

Cam follower

A-11


●Bearing Selection 2. Bearing Selection Rolling element bearings are available in a variety of types, configurations, and sizes. When selecting the correct bearing for your application, it is important to consider several factors, and analyse in various means.

A comparison of the performance characteristics for each bearing type is shown in Table 2.1. As a general guideline, the basic procedure for selecting the most appropriate bearing is shown in the following flow chart.

2.1 Bearing selection flow chart

Procedure

Confirm operating conditions and operating environment

●Function and construction of components to house bearings

Confirmation items

●Bearing mounting location ●Bearing load (direction and magnitude) ●Rotational speed ●Vibration and shock load ●Bearing temperature (Ambient temperature / temperature rise) ●Operating environment (potential for corrosion, degree of contamination, extent of lubrication)

Select bearing type and configuration

●Dimensional limitations (refer to page insert …A-30) ●Bearing load (magnitude, direction, vibration; presence of shock load) (refer to page insert …A-21) ●Rotational speed (refer to page insert …A-70) ●Bearing tolerances (refer to page insert …A-35) ●Rigidity (refer to page insert …A-67) ●Allowable misalignment of inner/outer rings (refer to page insert …A-87) ●Friction torque (refer to page insert …A-71) ●Bearing arrangement (fixed side, floating side) (refer to page insert …A-15) ●Installation and disassembly requirements (refer to page insert …A-88) ●Bearing availability and cost

Selection of bearing type and configuration

(1) Dimensional limitations The allowable space for bearings is generally limited. In most cases, shaft diameter (or the bearing bore diameter) has been determined according to the machine’s other design specifications. Therefore, bearing’s type and dimensions are determined according to bearing bore diameters. For this reason all dimension tables are organized according to standard bore diameters. There is a wide range of standardized bearing types and dimensions: the right one for a particular application can usually be found in these tables. (2) Bearing load The characteristics, magnitude, and direction of loads acting upon a bearing are extremely variable. In general, the basic load ratings shown in bearing dimension tables indicate their load capacity. However, in determining the appropriate bearing type, consideration must also be given to whether the acting load is a radial load only or combined radial and axial load, etc. When ball and roller bearings within the same dimension series are considered, the roller bearings have a larger load capacity and are also capable of withstanding greater vibration and shock loads.

A-12

Select bearing dimensions

●Design life of components to house bearings (refer to page insert …A-19) ●Dynamic/static equivalent load conditions (refer to page insert …A-25) ●Safety factor (refer to page insert …A-19) ●Allowable speed (refer to page insert …A-70) ●Allowable axial load (refer to page insert …A-19, 25) ●Allowable space (refer to page insert …A-30)

Select bearing tolerances

●Shaft runout tolerances (refer to page insert …A-35) ●Rotational speed (refer to page insert …A-70) ●Torque fluctuation

(3) Rotational speed The allowable speed of a bearing will differ depending upon bearing type, size, tolerances, cage type, load, lubricating conditions, and cooling conditions. The allowable speeds listed in the bearing tables for grease and oil lubrication are for normal tolerance NTN bearings. In general, deep groove ball bearings, angular contact ball bearings, and cylindrical roller bearings are most suitable for high speed applications. (4) Bearing tolerances The dimensional accuracy and operating tolerances of bearings are regulated by ISO and JIS standards. For equipment requiring high tolerance shaft runout or high speed operation, bearings with Class 5 tolerance or higher are recommended. Deep groove ball bearings, angular contact ball bearings, and cylindrical roller bearings are recommended for high rotational tolerances. (5) Rigidity Elastic deformation occurs along the contact surfaces of a bearing’s rolling elements and raceway surfaces under loading. With certain types of equipment it is necessary to reduce this deformation as much as


●Bearing Selection

Select bearing’s internal clearance

●Material and shape of shaft and housing (refer to page insert …A-85) ●Fit (refer to page insert …A-49) ●Temperature differential between inner/outer rings (refer to page insert …A-59) ●Allowable misalignment of inner/outer rings (refer to page insert …A-87) ●Load (magnitude, nature) (refer to page insert …A-21) ●Amount of preload (refer to page insert …A-66) ●Rotational speed (refer to page insert …A-70)

Select cage type and material

●Rotational speed (refer to page insert …A-70) ●Noise level ●Vibration and shock load ●Momentary load ●Lubrication type and method (refer to page insert …A-72)

Select lubricant, lubrication method, sealing method

●Operating temperature (refer to page insert …A-72) ●Rotational speed (refer to page insert …A-70) ●Lubrication type and method (refer to page insert …A-72) ●Sealing method (refer to page insert …A-80) ●Maintenance and inspection (refer to page insert …A-94)

possible. Roller bearings exhibit less elastic deformation than ball bearings. Furthermore, in some cases, bearings are given a load in advance (preloaded) to increase their rigidity. This procedure is commonly applied to deep groove ball bearings, angular contact ball bearings, and tapered roller bearings.

Confirm handling procedures

Select any special bearing specifications

●Operating environment (high/low temperature, vacuum, pharmaceutical, etc.) ●Requirement for high reliability

●Installation-related dimensions (refer to page insert …A-86) ●Installation and disassembly procedures (refer to page insert …A-88)

(8) Installation and disassembly Some applications require frequent disassembly and reassembly to enable periodic inspections and repairs. For such applications, bearings with separable inner/outer rings, such as cylindrical roller bearings, needle roller bearings, and tapered roller bearings are most appropriate. Incorporation of adapter sleeves simplifies the installation and disassembly of selfaligning ball bearings and spherical roller bearings with tapered bores.

(6) Misalignment of inner and outer rings Shaft flexure, variations in shaft or housing accuracy, and fitting errors. result in a certain degree of misalignment between the bearing’s inner and outer rings. In cases where the degree of misalignment is relatively large, self-aligning ball bearings, spherical roller bearings, or bearing units with self-aligning properties are the most appropriate choices. (Refer to Fig. 2.1)

Allowable misalignment angle

(7) Noise and torque levels Rolling bearings are manufactured and processed according to high precision standards, and therefore generally produce only slight amounts of noise and torque. For applications requiring particularly low-noise or low-torque operation, deep groove ball bearings and cylindrical roller bearings are most appropriate.

Self-aligning ball bearing

Allowable misalignment angle

Spherical roller bearing

Fig. 2.1

A-13


●Bearing Selection 2.2 Type and characteristics Table 2.1 shows types and characteristics of rolling bearings. Table 2.1 Type of rolling bearings and performance comparison Deep Angular Double row Duplex SelfCylindrical SingleDoubleDouble row Needle groove contact angular angular aligning roller flange flange cylindrical roller ball ball contact contact ball bearings cylindrical cylindrical roller bearings bearings bearings ball bearings ball bearings bearings roller bearings roller bearings bearings

Bearing types

Characteristics Load Carrying Capacity Radial load Axial load

High speed

1

1

High rotating accuracy Low noise/vibration Low friction torque High rigidity

1

1

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☆☆

☆☆

☆☆

☆☆

☆☆☆

DB and DF ◎ For arrangement ◎

DB ○ For arrangement

Allowable misalignment 1 ☆ for inner/outer rings

Inner ring tapered bore

☆☆☆

1

Separable inner/outer rings

☆☆☆

☆☆☆

Vibration/shock resistance

2

☆☆☆☆ ☆☆☆

☆☆☆☆ ☆☆☆

1

Stationary in axial direction

☆☆

4

5

For duplex arrangement

Remarks Reference page

B-5

B-43

B-60

B-43

B-65

Tapered Double-row, Spherical Thrust Cylindrical Spherical 4-row roller roller ball roller roller tapered bearings bearings bearings thrust thrust roller bearings bearings bearings Reference page

NU, N type

NJ, NF type

B-77

B-77

NUP, NP, NH NNU, NN type type B-77

B-102

NA type ―

Bearing types

Characteristics Load Carrying Capacity Radial load Axial load

☆☆☆

☆☆

☆☆☆

☆☆

1

A-70

High speed

A-35

High rotating accuracy

Low noise/vibration

A-71

Low friction torque

1

1

1

☆☆

☆☆☆☆ ☆☆☆

☆☆☆

☆☆☆

A-58

High rigidity 1

☆☆

☆☆☆

☆☆☆

☆☆☆

☆☆☆

A-21

Vibration/shock resistance

☆☆☆

☆☆☆

A-85

Allowable misalignment 1 for inner/outer rings

A-15

Stationary in axial direction

A-15

Moveable in axial direction

☆ ○

○ Including needle roller thrust bearing

For duplex arrangement

B-119

B-119

B-219

B-255

2 3

4

Separable inner/outer rings

A-85

Inner ring tapered bore

B-255

1

5

1 ☆ The number of stars indicates the degree to which that bearing type displays that particular characteristic. ★ Not applicable to that bearing type. 2 ◎ Indicates dual direction. ○ Indicates single direction axial movement only. 3 ◎ indicates movement in the axial direction is possible for the raceway surface; ○ indicates movement in the axial direction is possible for the fitting surface of the outer ring or inner ring.

Remarks

4 ○ Indicates both inner ring and outer ring are detachable.

Reference page

5 ○ Indicates inner ring with tapered bore is possible.

A-14


●Bearing Selection cylindrical roller bearings, and occurs on the fitting surface for those which are not separable, such as deep groove ball bearings. In applications with short distances between bearings, shaft expansion and contraction due to temperature fluctuations is slight, therefore the same type of bearing may be used for both the fixed-side and floating-side bearing. In such cases it is common to use a set of matching bearings, such as angular contact ball bearings, to guide and support the shaft in one axial direction only. Table 2.2 (1) shows typical bearing arrangements where the bearing type differs on the fixed side and floating side. Table 2.2 (2) shows some common bearing arrangements where no distinction is made between the fixed side and floating side. Vertical shaft bearing arrangements are shown in Table 2.2 (3).

2.3 Selection of bearing arrangement Shafts or axles are generally supported by a pair of bearings in the axial and radial directions. The bearing which prevents axial movement of the shaft relative to the housing is called the "fixed side bearing" and the bearing which allows axial movement relatively is called the "floating-side bearing". This allows for expansion and contraction of the shaft due to temperature variation and enables error in bearing mounting clearance to be absorbed. The fixed side bearing is able to support radial and axial loads. A bearing which can fix axial movement in both directions should therefore be selected. A floatingside bearing that allows movement in the axial direction while supporting a radial load is desirable. Movement in the axial direction occurs on the raceway surface for bearings with separable inner and outer rings such as

Table 2.2 (1) Bearing arrangement (distinction between fixed and floating-side)

Arrangement Fixed

Comment

Floating 1. General arrangement for small machinery. 2. For radial loads, but will also accept axial loads.

Application (Reference) Small pumps, auto-mobile transmissions, etc.

1. Suitable when mounting error and shaft deflection are minimal or used Medium-sized for high rotational speed application. electric motors, 2. Even with expansion and contraction of shaft, floating side moves ventilators, etc. smoothly. 1. Radial loading and dual direction of axial loading possible. 2. In place of duplex angular contact ball bearings, double-row angular contact ball bearings are also used.

Worm reduction gear

1. Heavy loading capable. 2. Shafting rigidity increased by preloading the two back-to-back fixed bearings. 3. Requires high precision shafts and housings, and minimal fitting errors.

Reduction gears for general industrial machinery

1. Allows for shaft deflection and fitting errors. 2. By using an adaptor on long shafts without screws or shoulders, bearing mounting and dismounting can be facilitated. 3. Self-aligning ball bearings are used for positioning in the axial direction, and not suitable for applications requiring support of axial load.

General industrial machinery

1. Widely used in general industrial machinery with heavy and shock  load demands. 2. Allows for shaft deflection and fitting errors. 3. Accepts radial loads as well as dual direction of axial loads.

Reduction gears for general industrial machinery

1. Accepts radial loads as well as dual direction axial loads. 2. Suitable when both inner and outer ring require tight fit.

Reduction gears for general industrial machinery

1. Capable of handling large radial and axial loads at high rotational speeds. 2. Maintains clearance between the bearing’s outer diameter and housing inner diameter to prevent deep groove ball bearings from receiving radial loads.

Transmissions for diesel locomotives

A-15


â—?Bearing Selection

Table 2.2 (2) Bearing arrangement (no distinction between fixed and floating-side)

Arrangement

Comment 1. General arrangement for use in small machines. 2. Preload is sometimes applied by placing a spring on the outer ring side surface or inserting a shim. (can be floating-side bearings.)

Application (Reference) Small electric motors, small reduction gears, etc.

1. Back to back arrangement is preferable to face to face arrangement when moment load applied. Machine tool 2. Able to support axial and radial loads; suitable for high-speed rotation. spindles, etc. 3. Rigidity of shaft can be enhanced by providing preload.

Back to back

1. Capable of supporting extra heavy loads and impact loads. 2. Suitable if inner and outer ring tight fit is required. 3. Care must be taken that axial clearance does not become too small during operation.

Construction equipment, mining equipment sheaves, agitators, etc.

1. Withstands heavy and shock loads. Wide range application. 2. Shaft rigidity can be enhanced by providing preload, but make sure preload is not excessive. 3. Back-to-back arrangement for moment loads, and face-to-face arrangement to alleviate fitting errors. 4. With face-to-face arrangement, inner ring tight fit is facilitated.

Reduction gears, front and rear axle of automobiles, etc.

Face to face Table 2.2 (3) Bearing arrangement (Vertical shaft)

Arrangement

Comment

1. When fixing bearing is a duplex angular contact ball bearing, floating bearing should be a cylindrical roller bearing.

Application (Reference)

Vertically mounted electric motors, etc.

1. Most suitable arrangement for very heavy axial loads. Crane center shafts, 2. Shaft deflection and mounting error can be absorbed by matching the etc. center of the spherical surface with the center of spherical roller thrust bearings.

A-16


●Load Rating and Life 3. Load Rating and Life 3.1 Bearing life Even in bearings operating under normal conditions, the surfaces of the raceway and rolling elements are constantly being subjected to repeated compressive stresses which causes flaking of these surfaces to occur. This flaking is due to material fatigue and will eventually cause the bearings to fail. The effective life of a bearing is usually defined in terms of the total number of revolutions a bearing can undergo before flaking of either the raceway surface or the rolling element surfaces occurs.

C

For ball bearings: L10 = (

3

) …………… (3.1)

P

C

( For roller bearings: L10 =

P

10/3

) ………… (3.2)

where, L10 : Basic rating life 106 revolutions C : Basic dynamic load rating, N {kgf} (Cr: radial bearings, Ca: thrust bearings) P : Equivalent dynamic load, N {kgf} (Pr: radial bearings, Pa: thrust bearings) -1 n : Rotational speed, min

Other causes of bearing failure are often attributed to problems such as seizing, abrasions, cracking, chipping, scuffing, rust, etc. However, these so called "causes" of bearing failure are usually themselves caused by improper installation, insufficient or improper lubrication, faulty sealing or inaccurate bearing selection. Since the above mentioned "causes" of bearing failure can be avoided by taking the proper precautions, and are not simply caused by material fatigue, they are considered separately from the flaking aspect.

The relationship between Rotational speed n and speed factor fn as well as the relation between the basic rating life L10h and the life factor fn is shown in Table 3.1 and Fig. 3.1. Table 3.1 Correlation of bearing basic rating life, life factor, and speed factor

3.2 Basic rating life and basic dynamic load rating A group of seemingly identical bearings when subjected to identical load and operating conditions will exhibit a wide diversity in their durability. This "life" disparity can be accounted for by the difference in the fatigue of the bearing material itself. This disparity is considered statistically when calculating bearing life, and the basic rating life is defined as follows.

Classification

Ball bearing

Basic rating life L10h h

6

Roller bearing

3

10 60n

( CP ) = 500 f

6

h

Life factor fh

fn C P

Speed factor fn

( 33.3 n )

10 60n

3

n min-1

fn

60,000

0.082

1/3

60,000

( 33.3 n )

fh

n min-1

fn

5.4 60,000

4.5

40,000

20,000

30,000

4

6,000 4,000

Basic dynamic load rating expresses a rolling bearing's capacity to support a dynamic load. The basic dynamic load rating is the load under which the basic rating life of the bearing is 1 million revolutions. This is expressed as pure radial load for radial bearings and pure axial load for thrust bearings. These are referred to as "basic dynamic load rating (Cr)" and "basic dynamic axial load rating (Ca)." The basic dynamic load ratings given in the bearing tables of this catalog are for bearings constructed of NTN standard bearing materials, using standard manufacturing techniques.

3,000

1,500

8,000

0.18

0.24

2,000

10,000

15,000

0.20

3

10,000 8,000

0.18

0.20

6,000

20,000

0.24

3,000

0.26 0.28

2,000

6,000

10,000

800

0.30

6,000

1,500

4,000 0.35

600 0.4

3,000

0.5

1.8

600

0.7 0.8

300

1.4

200

1.3

150

1.2

100

1,000 900 800 700 600 500

1.0 400 1.1

20

1.2

15

1.3

1.49

2,000

1.5

1,500

300

1.0

1.4 1.3

0.7

0.9

30

20

0.80

15

0.74

700

500

1.0 400

1.2

10

1.44

1.0 0.95 0.90

300

1.3 1.4

1.1

600

1.1

0.85

1.2

800

40

0.95

1,000 900

60

0.75

200

0.6

0.85 0.80

200

Fig. 3.1 Bearing life rating scale

A-17

1.7 1.6

0.5

0.8

0.90

1.4

10

1.8

3,000

80 1.1

0.9 40 30

1.9

1.5

0.6

80

The relationship between the basic rating life, the basic dynamic load rating and the bearing load is given in formula.

2 4,000

0.4

1.6

1,500

200

60

800

400

2,000

300

100

1,000

0.35

1.7

400

150

2 1.9

2.5

8,000

0.30

1,000

3

15,000

0.22

4,000

2.5

0.26 0.28

3.5

30,000 0.16

3.5

20,000 0.16

0.22

40,000

20,000 15,000

0.14

8,000

4

0.12

0.14

15,000

10,000

4.6 4.5

0.106

30,000

40,000 0.12

fh

60,000

40,000

0.10

L10h h 80,000

5

0.09

30,000

= 500 fh

Roller bearings

L10h h 80,000

10/3

fn C P

Ball bearings

The basic rating life is based on a 90% statistical model which is expressed as the total number of revolutions 90% of the bearings in an identical group of bearings subjected to identical operating conditions will attain or surpass before flaking due to material fatigue occurs. For bearings operating at fixed constant speeds, the basic rating life (90% reliability) is expressed in the total number of hours of operation.

( CP )

0.76

3/10

10/3


●Load Rating and Life

3.3.1 Reliability factor a1 The value of reliability factor a1 is provided in Table 3.2 for reliability of 90% or greater.

When several bearings are incorporated in machines or equipment as complete units, all the bearings in the unit are considered as a whole when computing bearing life (see formula 3.3).

3.3.2 Bearing characteristics factor a2 Bearing characteristics concerning life vary according to bearing material, quality of material and if using special manufacturing process. In this case, life is adjusted using bearing characteristics factor a2.

1 L= …………(3.3) 1 1 1 1/e ( e + e + … e) L2 Ln L1 where, L : Total basic rating life of entire unit, h L1 , L2 …Ln : Basic rating life of individual bearings, 1, 2, …n, h e = 10/9....................For ball bearings e = 9/8......................For roller bearings

The basic dynamic load ratings listed in the catalog are based on NTN's standard material and process, therefore, the adjustment factor a2 =1. a2 > 1 may be used for specially enhanced materials and manufacturing methods.If this applies, consult with NTN Engineering.

When the load conditions vary at regular intervals, the life can be given by formula (3.4). Lm =(

Φ1 L1

Φ2 L2

+…

Φ Lj

j

Dimensions change significantly if bearings made of high carbon chrome bearing steel with conventional heat treatment are used at temperatures in excess of 120˚C for an extended period of time. NTN Engineering therefore offers a bearing for high-temperature applications specially treated to stabilize dimensions at the maximum operating temperature (TS treatment). The treatment however makes the bearing softer and affects life of the bearing. Life is adjusted by multiplying by the values given in Table 3.3.

-1

)……………(3.4)

where, L m : Total life of bearing Φ j : Frequency of individual load conditions (ΣΦ j = 1) L j : Life under individual conditions If equivalent load P and rotational speed n are operating conditions of the bearing, basic rated dynamic load C that satisfies required life of the bearing is determined using Table 3.1 and formula (3.5). Bearings that satisfy the required C can be selected from the bearing dimensions table provided in the catalog.

Table 3.2 Reliability factor a1 Reliability %

Ln

Reliability factor a1

90

L10

1.00

95

L5

0.62

96

L4

0.53

97

L3

0.44

98

L2

0.33

99

L1

0.21

fh C = P ――……………………………………(3.5) fn

3.3 Adjusted rating life

Table 3.3 Treatment for stabilizing dimensions Max. operating Bearing characteristics Symbol temperature (C˚) factor a2

The basic bearing rating life (90% reliability factor) can be calculated through the formulas mentioned earlier in Section 3.2. However, in some applications a bearing life factor of over 90% reliability may be required. To meet these requirements, bearing life can be lengthened by the use of specially improved bearing materials or manufacturing process. Bearing life is also sometimes affected by operating conditions such as lubrication, temperature and rotational speed. Basic rating life adjusted to compensate for this is called "adjusted rating life," and is determined using formula (3.6).

TS2

160

1.00

TS3

200

0.73

TS4

250

0.48

3.3.3 Operating conditions factor a3 Operating conditions factor a3 is used to compensate for when lubrication condition worsens due to rise in temperature or rotational speed, lubricant deteriorates, or becomes contaminated with foreign matter. Generally speaking, when lubricating conditions are satisfactory, the a3 factor has a value of one; and when lubricating conditions are exceptionally favorable, and all other operating conditions are normal, a3 can have a value greater than one. a3 is however less than 1 in the following cases:

Lna = a1・a2・a3・L10…(3.6) where, Lna : Adjusted rating life in millions of revolutions (106) a1 : Reliability factor a2 : Bearing characteristics factor a3 : Operating conditions factor

A-18


●Load Rating and Life

¡Dynamic viscosity of lubricating oil is too low for bearing

When a super heavy load is applied, harmful plastic distortion could be produced on the contact surfaces of the rolling elements and raceway. The formulae for determining basic rating life (3.1, 3.2, and 3.6) do not apply if Pr exceeds either Cor (Basic static load rating) or 0.5 Cr for radial bearings, or if Pa exceeds 0.5 Ca for thrust bearings.

Operating conditions factor a3

operating temperature 2 2 (13 mm /s or less for ball bearings, 20 mm /s for roller bearings) ¡Rotational speed is particularly low -1 (If sum of rotational speed n min and rolling element pitch diameter Dpw mm is Dpw・n < 10,000) ¡Bearing operating temperature is too high If bearing operating temperature is too high, the raceway becomes softened, thereby shortening life. Life is adjusted by multiplying by the values given in Fig. 3.2 as the operating condition factor according to operating temperature. This however does not apply to bearings that have been treated to stabilize dimensions. ¡Lubricant contaminated with foreign matter or moisture If using special operating condition, consult with NTN Engineering. Even if a2 > 1 is used for specially bearings made of enhanced materials or produced by special manufacturing methods, a2×a3 < 1 is used if lubricating conditions are not favorable.

3.4 Machine applications and requisite life When selecting a bearing, it is essential that the requisite life of the bearing be established in relation to the operating conditions. The requisite life of the bearing is usually determined by the type of machine in which the bearing will be used, and duration of service and operational reliability requirements. A general guide to these requisite life criteria is shown in Table 3.4. When determining bearing size, the fatigue life of the bearing is an important factor; however, besides bearing life, the strength and rigidity of the shaft and housing must also be taken into consideration.

3.5 Basic static load rating When stationary rolling bearings are subjected to static loads, they suffer from partial permanent deformation of the contact surfaces at the contact point between the rolling elements and the raceway. The amount of deformity increases as the load increases, and if this increase in load exceeds certain limits, the subsequent smooth operation of the bearings is impaired.

1.0 0.8 0.6 0.4 0.2

It has been found through experience that a permanent deformity of 0.0001 times the diameter of the rolling element, occurring at the most heavily stressed contact point between the raceway and the rolling elements, can be tolerated without any impairment in running efficiency.

100 150 200 250 300 Operating temperature ˚C

Fig. 3.2 Operating conditions factor according to operating temperature

Table 3.4 Machine application and requisite life (reference) Service classification

∼4

4∼12

Machines used for short periods or used only occasionally

¡Household appliances ¡Electric hand tools

Short period or intermittent use, but with high reliability requirements

¡Medical appliances ¡Construction ¡Measuring instruments  equipment ¡Elevators ¡Cranes

Machines not in constant use, but used for long periods

Machines in constant use over 8 hours a day

×103 h

Machine application and requisite life (reference) L10h 12∼30

30∼60

60∼

¡Farm machinery ¡Office equipment ¡Home air conditioning motor

¡Automobiles ¡Two-wheeled vehicles

¡Crane (sheaves)

¡Small motors ¡Buses/trucks ¡General gear drives ¡Woodworking  machines

¡Machine spindles ¡Industrial motors ¡Crushers ¡Vibrating screens

¡Main gear drives ¡Rubber/plastic ¡Calender rolls ¡Printing machines

¡Rolling mills ¡Escalators ¡Conveyors ¡Centrifuges

¡Railway vehicle  axles ¡Air conditioners ¡Large motors ¡Compressor pumps

¡Locomotive axles ¡Traction motors ¡Mine hoists ¡Pressed flywheels

¡Papermaking  machines ¡Propulsion  equipment for  marine vessels ¡Water supply  equipment ¡Mine drain  pumps/ventilators ¡Power generating  equipment

24 hour continuous operation, non-interruptable

A-19


●Load Rating and Life

The basic static load rating refers to a fixed static load limit at which a specified amount of permanent deformation occurs. It applies to pure radial loads for radial bearings and to pure axial loads for thrust bearings. The maximum applied load values for contact stress occurring at the rolling element and raceway contact points are given below. For ball bearings For self-aligning ball bearings For roller bearings

This is generally determined by taking the safety factor So given in Table 3.5 and formula (3.7) into account. So =Co/Po…(3.7) where, So : Safety factor Co : Basic static load rating, N {kgf} (radial bearings: Cor, thrust bearings: Coa) Po : Static equivalent load, N {kgf} (radial: Por, thrust: Coa)

2

4,200 MPa {428kgf/mm } 2 4,600 MPa {469kgf/mm } 2 4,000 MPa {408kgf/mm }

Table 3.5 Minimum safety factor values S0

Referred to as "basic static radial load rating" for radial bearings and "basic static axial load rating" for thrust bearings, basic static load rating is expressed as Cor or Coa respectively and is provided in the bearing dimensions table.

Ball bearings

Roller bearings

High rotational accuracy demand

2

3

Normal rotating accuracy demand (Universal application)

1

1.5

0.5

1

Operating conditions

Slight rotational accuracy deterioration permitted (Low speed, heavy loading, etc.)

3.6 Allowable static equivalent load Generally the static equivalent load which can be permitted (See page A-25) is limited by the basic static rating load as stated in Section 3.5. However, depending on requirements regarding friction and smooth operation, these limits may be greater or lesser than the basic static rating load.

Note 1: For spherical thrust roller bearings, min. S0 value=4. 2: For shell needle roller bearings, min. S0 value=3. 3: When vibration and/or shock loads are present, a load factor based on the shock load needs to be included in the P0 max value. 4: If a large axial load is applied to deep groove ball bearings or angular ball bearings, the contact oval may exceed the raceway surface. For more information, please contact NTN Engineering.

A-20


●Bearing Load Calculation 4. Bearing Load Calculation To compute bearing loads, the forces which act on the shaft being supported by the bearing must be determined. Loads which act on the shaft and its related parts include dead load of the rotator, load produced when the machine performs work, and load produced by transmission of dynamic force. These can theoretically be mathematically calculated, but calculation is difficult in many cases.

Ks = Kt・tanα(Spur gear) ……(4.3a) tanα = Kt・cosβ (Helical gear)……(4.3b) Kr = √Kt +Ks ………………………(4.4) 2

2

Ka = Kt・tanβ(Helical gear) ……(4.5) where, Kt :Tangential gear load (tangential force), N {kgf} Ks :Radial gear load (separating force), N {kgf} Kr :Right angle shaft load (resultant force of tangential force and separating force), N {kgf} Ka:Parallel load on shaft, N {kgf} H :Transmission force , kW -1 n :Rotational speed, min Dp:Gear pitch circle diameter, mm α:Gear pressure angle, deg β:Gear helix angle, deg

A method of calculating loads that act upon shafts that convey dynamic force, which is the primary application of bearings, is provided herein.

4.1 Load acting on shafts 4.1.1 Load factor There are many instances where the actual operational shaft load is much greater than the theoretically calculated load, due to machine vibration and/or shock. This actual shaft load can be found by using formula (4.1).

Because the actual gear load also contains vibrations and shock loads as well, the theoretical load obtained by the above formula should also be adjusted by the gear factor fz as shown in Table 4.2.

K = fw・Kc ……………………………(4.1) where, K :Actual shaft load N{kgf} fw :Load factor (Table 4.1) Kc:Theoretically calculated value N{kgf} Table 4.1 Load factor fw Amount of shock

fw

Application

Very little or no shock

Electric machines, machine tools, 1.0∼1.2 measuring instruments.

Light shock

Railway vehicles, automobiles, rolling mills, metal working machines, 1.2∼1.5 paper making machines, printing machines, aircraft, textile machines, electrical units, office machines.

Heavy shock

Crushers, agricultural equipment, 1.5∼3.0 construction equipment, cranes.

Ks

Kt Fig. 4.1 Spur gear loads

4.1.2 Gear load The loads operating on gears can be divided into three main types according to the direction in which the load is applied; i.e. tangential (Kt), radial (Ks), and axial (Ka). The magnitude and direction of these loads differ according to the types of gears involved. The load calculation methods given herein are for two general-use gear and shaft arrangements: parallel shaft gears, and cross shaft gears.

Ks

Ka

Kt Fig. 4.2

Helical gear loads

Kt Kr

Ks

Dp

(1)Loads acting on parallel shaft gears The forces acting on spur gears and helical gears are depicted in Figs. 4.1, 4.2, and 4.3. The load magnitude can be found by using or formulas (4.2), through (4.5). 6

Kt =

19.1×10 ・H Dp・n 6

1.95×10 ・H = Dp・n

N

……(4.2) Fig. 4.3

{kgf}

A-21

Radial resultant forces


●Bearing Load Calculation

Table 4.2 Gear factor fz Gear type

fz

Precision ground gears (Pitch and tooth profile errors of less than 0.02 mm)

1.05∼1.1

Ordinary machined gears (Pitch and tooth profile errors of less than 0.1 mm)

1.1∼1.3

For spiral bevel gears, the direction of the load varies depending on the direction of the helix angle, the direction of rotation, and which side is the driving side or the driven side. The directions for the separating force (Ks) and axial load (Ka) shown in Fig. 4.5 are positive directions. The direction of rotation and the helix angle direction are defined as viewed from the large end of the gear. The gear rotation direction in Fig. 4.5 is assumed to be clockwise (right).

(2)Loads acting on cross shafts Gear loads acting on straight tooth bevel gears and spiral bevel gears on cross shafts are shown in Figs. 4.4 and 4.5. The calculation methods for these gear loads are shown in Table 4.3. Herein, to calculate gear loads for straight bevel gears, the helix angle β= 0.

K tp

Ka p Ks p

The symbols and units used in Table 4.3 are as follows:

Ka g Ks g

Kt :Tangential gear load (tangential force), N {kgf} Ks :Radial gear load (separating force), N {kgf} Ka :Parallel shaft load (axial load), N {kgf} H :Transmission force, kW n :Rotational speed, min-1 Dpm :Mean pitch circle diameter, mm α :Gear pressure angle, deg β :Helix angle, deg δ :Pitch cone angle, deg

Kt g

Fig. 4.4 Loads on bevel gears Kt

Ka

Because the two shafts intersect, the relationship of pinion and gear load is as follows:

Ks δ β

D pm 2

Ksp=Kag…………………(4.6) Kap=Ksg…………………(4.7) where, Ksp,Ksg :Pinion and gear separating force, N {kgf} Kap,Kag:Pinion and gear axial load, N {kgf}

Fig. 4.5 Bevel gear diagram

Table 4.3 Loads acting on bevel gears Types of load

Rotation direction Helix direction

Clockwise

Counter clockwise

Clockwise

Counter clockwise

Right

Left

Left

Right

6

Tangential load (tangential force) Kt

Radial load (separation force) Ks

Parallel load on gear shaft (axial load) Ka

Kt=

6

19.1×10 ・H Dpm・n

1.95×10 ・H

,

Dpm・n

Driving side

Ks=Kt

tanα cosδ + tanβsinδ cosβ

Ks=Kt

tanα cosδ - tanβsinδ cosβ

Driven side

Ks=Kt

tanα cosδ - tanβsinδ cosβ

Ks=Kt

tanα cosδ + tanβsinδ cosβ

Driving side

Ka=Kt

tanα sinδ - tanβcosδ cosβ

Ka=Kt

tanα sinδ + tanβcosδ cosβ

Driven side

Ka=Kt

tanα sinδ + tanβcosδ cosβ

Ka=Kt

tanα sinδ - tanβcosδ cosβ

A-22


●Bearing Load Calculation

4.1.3 Chain / belt shaft load The tangential loads on sprockets or pulleys when power (load) is transmitted by means of chains or belts can be calculated by formula (4.8).

4.2 Bearing load distribution For shafting, the static tension is considered to be supported by the bearings, and any loads acting on the shafts are distributed to the bearings.

6

19.1 ×10 ・H Dp・n

Kt=

N

For example, in the gear shaft assembly depicted in Fig. 4.7, the applied bearing loads can be found by using formulas (4.10) and (4.11).

……………(4.8)

6

1.95×10 ・H {kgf} Dp・n

This example is a simple case, but in reality, many of the calculations are quite complicated.

where, Kt :Sprocket/pulley tangential load, N {kgf}

FrA=

H :Transmitted force, kW

a+b d F1+ b c+d

Dp:Sprocket/pulley pitch diameter, mm FrB=−

For belt drives, an initial tension is applied to give sufficient constant operating tension on the belt and pulley. Taking this tension into account, the radial loads acting on the pulley are expressed by formula (4.9). For chain drives, the same formula can also be used if vibrations and shock loads are taken into consideration.

F2 ……………(4.10)

a c F1+ F2 ……………(4.11) b c+d

where, FrA:Radial load on bearing A, N {kgf} FrB:Radial load on bearing B, N {kgf} F1, F2:Radial load on shaft, N {kgf} If directions of radial load differ, the vector sum of each respective load must be determined.

Kr=f b・Kt…(4.9) where, Kr:Sprocket or pulley radial load, N {kgf}

a

f b:Chain or belt factor (Table 4.4)

b

Bearing A

Bearing B

FrA

FrB

Table. 4.4 chain or belt factor f b Chain or belt type

fb

Chain (single)

1.2∼1.5

V-belt

1.5∼2.0

Timing belt

1.1∼1.3

Flat belt (w / tension pulley)

2.5∼3.0

Flat belt

3.0∼4.0

F!

F@ c

Fig. 4.7 se side F1 Loo

Dp

Kr F2 Tens ion s

ide

Fig. 4.6 Chain / belt loads

A-23

d


●Bearing Load Calculation

(3) Linear fluctuating load The mean load, Fm, can be approximated by formula (4.14).

4.3 Mean load The load on bearings used in machines under normal circumstances will, in many cases, fluctuate according to a fixed time period or planned operation schedule. The load on bearings operating under such conditions can be converted to a mean load (Fm), this is a load which gives bearings the same life they would have under constant operating conditions.

Fm=

Fmin+2Fmax …(4.14) 3

F

(1) Fluctuating stepped load The mean bearing load, Fm, for stepped loads is calculated from formula (4.12). F1 , F2 ....... Fn are the loads acting on the bearing; n1, n2.......nn and t1, t2....... tn are the bearing speeds and operating times respectively.

Fmax Fm

Fmin

p

Σ (Fi ni ti) 1/p …………………(4.12) Σ (ni ti) 〕

Fm= 〔

t

where:

Fig. 4.10 Linear fluctuating load

For ball bearings For roller bearings

p=3 p=10/3

(4) Sinusoidal fluctuating load The mean load, Fm, can be approximated by formulas (4.15) and (4.16).

F F1 F2

case (a) case (b)

Fm

Fn n1 t1

n2t2

Fm=0.75 Fmax ………(4.15) Fm=0.65 Fmax ………(4.16)

F

nn tn Fmax

Fig. 4.8 Stepped load

Fm

(2) Continuously fluctuating load Where it is possible to express the function F(t) in terms of load cycle to and time t, the mean load is found by using formula (4.13). Fm= 〔

to 1 p (t)d t ∫ F to o

t

(a) F

1/p

〕………………(4.13)

Fmax

where: p=3 p=10/3

For ball bearings For roller bearings

Fm

t (b) F Fig. 4.11 Sinusoidal variable load

F(t) Fm

0

to

2to

t

Fig. 4.9 Load that fluctuated as function of time

A-24


●Bearing Load Calculation

where,

4.4 Equivalent load

Por:Static equivalent radial load, N {kgf} Fr :Actual radial load, N {kgf} Fa :Actual axial load, N {kgf} Xo :Static radial load factor Yo :Static axial load factor The values for Xo and Yo are given in the respective bearing tables.

4.4.1 Dynamic equivalent load When both dynamic radial loads and dynamic axial loads act on a bearing at the same time, the hypothetical load acting on the center of the bearing which gives the bearings the same life as if they had only a radial load or only an axial load is called the dynamic equivalent load.

(2) Static equivalent axial load For spherical thrust roller bearings the static equivalent axial load is expressed by formula (4.21). Poa=Fa+2.7Fr…(4.21) where, Poa:Static equivalent axial load, N {kgf} Fa :Actual axial load, N {kgf} Fr :Actual radial load, N {kgf} Provided that Fr / Fa ≦ 0.55 only.

For radial bearings, this load is expressed as pure radial load and is called the dynamic equivalent radial load. For thrust bearings, it is expressed as pure axial load, and is called the dynamic equivalent axial load. (1) Dynamic equivalent radial load The dynamic equivalent radial load is expressed by formula (4.17). Pr=XFr+YFa………………(4.17) where, Pr:Dynamic equivalent radial load, N {kgf} Fr:Actual radial load, N {kgf} Fa:Actual axial load, N {kgf} X :Radial load factor Y :Axial load factor The values for X and Y are listed in the bearing tables.

4.4.3 Load calculation for angular contact ball bearings and tapered roller bearings For angular contact ball bearings and tapered roller bearings the pressure cone apex (load center) is located as shown in Fig. 4.12, and their values are listed in the bearing tables. When radial loads act on these types of bearings the component force is induced in the axial direction. For this reason, these bearings are used in pairs. For load calculation this component force must be taken into consideration and is expressed by formula (4.22).

(2) Dynamic equivalent axial load As a rule, standard thrust bearings with a contact angle of 90˚ cannot carry radial loads. However, self-aligning thrust roller bearings can accept some radial load. The dynamic equivalent axial load for these bearings is given in formula (4.18).

Fa =

Pa=Fa+1.2Fr………………(4.18) where, Pa:Dynamic equivalent axial load, N {kgf} Fa:Actual axial load, N {kgf} Fr :Actual radial load, N {kgf} Provided that Fr / Fa ≦ 0.55 only.

0.5Fr Y …………………(4.22)

where, Fa: Axial component force, N {kgf} Fr: Radial load, N {kgf} Y: Axial load factor The dynamic equivalent radial loads for these bearing pairs are given in Table 4.5.

4.4.2 Static equivalent load The static equivalent load is a hypothetical load which would cause the same total permanent deformation at the most heavily stressed contact point between the rolling elements and the raceway as under actual load conditions; that is when both static radial loads and static axial loads are simultaneously applied to the bearing.

α

α

Fa

For radial bearings this hypothetical load refers to pure radial loads, and for thrust bearings it refers to pure centric axial loads. These loads are designated static equivalent radial loads and static equivalent axial loads respectively.

Load center

Fa

Fr

Load center

Fr

(1) Static equivalent radial load For radial bearings the static equivalent radial load can be found by using formula (4.19) or (4.20). The greater of the two resultant values is always taken for Por. Por=Xo Fr+Yo Fa… (4.19) Por=Fr …………… (4.20)

a

a

Fig. 4.12 Pressure cone apex and axial component force

A-25


●Bearing Load Calculation

Table 4.5 Bearing arrangement and dynamic equivalent load Bearing arrangement Rear

Brg1

Brg2 0.5Fr1 0.5Fr2 ≦ + Fa Y2 Y1

Fa

Fr 1 Front

Brg2

Brg1

0.5Fr1 0.5Fr2 > + Fa Y2 Y1 Fr1

Fa2= 0.5Fr1 − Fa Y1

Brg2 0.5Fr2 0.5Fr1 ≦ + Fa Y1 Y2 Fa

Fr 1

Fr 2

Brg2

Brg1 0.5Fr2 0.5Fr1 > + Fa Y1 Y2

Fa

Fr 2

Fa1= 0.5Fr2 + Fa Y2

Brg1

Fr 2

Front

Axial load

Fr2

Fa

Rear

Load condition

Fa2= 0.5Fr1 + Fa Y1 Fa1= 0.5Fr2 − Fa Y2

Fr 1

Note 1: Applies when preload is zero. 2: Radial forces in the opposite direction to the arrow in the above illustration are also regarded as positive. 3: Dynamic equivalent radial load is calculated by using the table on the right of the size table of the bearing after axial load is obtained for X and Y factor.

A-26


●Bearing Load Calculation

4.5 Bearing rating life and load calculation examples

Therefore, with life factor fh = 2.46, from Fig. 3.1 the rated life, L10h, is approximately 7,500 hours. ――――――――――――――――――――――――――――――――――――

In the examples given in this section, for the purpose of calculation, all hypothetical load factors as well as all calculated load factors may be presumed to be included in the resultant load values.

(Example 3) Determine the optimum model number for a cylindrical roller bearing operating at the rotational speed n = 450 min-1, with a radial load Fr of 200 kN {20,400kgf}, and which must have a life (L10h) of over 20,000 hours.

――――――――――――――――――――――――――――――――――――

(Example 1) What is the rating life in hours of operation (L10h) for deep groove ball bearing 6208 operating at rotational speed n = 650 min-1, with a radial load Fr of 3.2 kN {326 kgf} ?

――――――――――――――――――――――――――――――――――――

From Fig. 3.1 the life factor fh = 3.02 (L10h at 20,000), and the speed factor fn = 0.46 (n = 450 min-1). To find the required basic dynamic load rating, Cr, formula (3.1) is used.

――――――――――――――――――――――――――――――――――――

From formula (4.17) the dynamic equivalent radial load:

fh 3.02 Pr = ×200 0.46 fn =1,313kN{134,000kgf}

Cr=

Pr=Fr=3.2kN{326kgf} Basic dynamic load rating Cr for bearing 6208 given on page B-12 is 29.1 kN {2970 kgf}, ball bearing speed factor fn relative to rotational speed n = 650 min-1 from Fig. 3.1 is fn = 0.37. Thus life factor fh from formula (3.5) is: f h=fn

From page B-92, the smallest bearing that fulfills all the requirements is NU2336 (Cr = 1,380 kN {141,000kgf}).

29.1 Cr =0.37× =3.36 3.2 Pr

Therefore, with fh = 3.36 from Fig. 3.1 the rated life, L10h, is approximately 19,000 hours. ――――――――――――――――――――――――――――――――――――

(Example 2) What is the life rating L10h for the same bearing and conditions as in Example 1, but with an additional axial load Fa of 1.8 kN {184 kgf} ?

――――――――――――――――――――――――――――――――――――

To find the dynamic equivalent radial load value for Pr, the radial load factor X and axial load factor Y are used. Basic static load rating Cor for bearing 6208 given on page B-12 is 17.8 kN {1820 kgf} and fo is 14.0. Therefore: 14×1.8 fo・Fa = = 1.42 17.8 Cor

Calculating by the proportional interpolation method given on page B-13, e = 0.30. For the operating radial load and axial load: 1.8 Fa = =0.56>e=0.30 3.2 Fr

From page B-13 X = 0.56 and Y = 1.44, and from formula (4.17) the equivalent radial load, Pr, is: Pr=XFr+YFa=0.56×3.2+1.43×1.8 =4.38

kN{447kgf}

From Fig. 3.1 and formula (3.1) the life factor, fh, is: f h=fn

29.1 Cr = 0.37× = 2.46 4.38 Pr

A-27


●Bearing Load Calculation

Equally, the equivalent radial load for bearing@is:

――――――――――――――――――――――――――――――――――――

(Example 4) The spur gear shown in Fig. 4.13 (pitch diameter Dp = 150 mm, pressure angleα= 20˚) is supported by a pair of tapered roller bearings, 4T-32206 (Cr = 54.5 kN {5,600 kgf}) and 4T-32205 (Cr = 42 kN {4300 kfg}). Find rating life for each bearing when gear transfer power H = 150 kW and rotational speed n = 2,000 min-1.

Fa@ 1.87 = =0.45<e=0.36 4.18 Fr@ Pr@ = XFr@+Y@ Fa@=0.4×4.18+1.67×1.87 =4.79kN{489kgf}

From formula (3.5) and Fig. 3.1 the life factor, f h, for each bearing is

――――――――――――――――――――――――――――――――――――

f h1= fn Bearings1 (4T-32206)

Bearings2 (4T-32205)

Cr1 =0.293×54.5/5.98=2.67 Pr1

Cr2 =0.293×42.0/4.79=2.57 Pr2 Therefore: a2 = 1.4(4T-tapered roller bearings shown in

150

f h2= fn

B-130)

70

Lh1 =13,200×a2 =13,200×1.4 =18,480 hour Lh2 =11,600×a2 =11,600×1.4 =16,240 hour

100 170

Fig. 4.13 Spur gear diagram

The combined bearing life, Lh, from formula (3.3) is:

The gear load from formulas (4.2), (4.3a) and (4.4) is: 6

19.1×10 ・H 19,100×150 = Dp・n 150×2,000 =9.55kN{974kgf}

Kt =

1

Lh=

〔 L1

h1

e

1 e Lh2

Ks =Kt・tanα=9.55×tan20˚ =3.48kN{355kgf}

=10.16kN{1,040kgf}

=9,330 hour

The radial loads for bearings ! and @ are: 100 100 Kr = ×10.16=5.98kN{610kgf} 170 170

Fr2 =

70 70 Kr= ×10.16=4.18kN{426kgf} 170 170

0.5Fr2 0.5Fr1 =1.87> =1.25 Y2 Y1

The axial loads for bearings!and@are: Fa1 =0kN{0kgf} Fa2 =

1

1 1 + 〔 18,480 〕 9/8 16,2409/8

Kr =√Kt2 +Ks2 =√9.552 +3.482

Fr1 =

1/e

0.5Fr1 0.5×5.98 = =1.87kN{191kgf} 1.60 Y1

From page B-129, the equivalent radial load for bearing !is: 0 Fa1 = =0<e=0.37 5.98 Fr1 Pr1 = Fr1=5.98kN{610kgf}

A-28

8/9


●Bearing Load Calculation

――――――――――――――――――――――――――――――――――――

――――――――――――――――――――――――――――――――――――

(Example 5) Find the mean load for spherical roller bearing 23932 (La = 320 kN {33,000 kgf}) when operated under the fluctuating conditions shown in Table 4.6.

(Example 6) Find the threshold values for rating life time and allowable axial load when cylindrical roller bearing NUP312 is used under the following conditions: Provided that intermittent axial load and oil lubricant.

――――――――――――――――――――――――――――――――――――

Radial load Fr=10kN{1,020kgf}

Table 4.6 Condition Operating time No. φi i %

Radial load Fri kN{ kgf }

Axial load Fai kN{ kgf }

Revolution ni min-1

1

5

10{ 1020 }

2{ 204 }

1200

2

10

12{ 1220 }

4{ 408 }

1000

3

60

20{ 2040 }

6{ 612 }

800

4

15

25{ 2550 }

7{ 714 }

600

5

10

30{ 3060 }

10{ 1020 }

400

Rotational speed n =2,000 min-1 ――――――――――――――――――――――――――――――――――――

Radial load is: Pr=Fr=10kN{1,020kgf} The speed factor of cylindrical roller bearing, fn , at n= 2,000 min-1, from Table 3.1 fn = 〔

33.3 2,000

3/10

〕 =0.293

The life factor, f h, from formula (3.4)

The equivalent radial load, Pr, for each operating condition is found by using formula (4.17) and shown in Table 4.7. Because all the values for Fri and Fai from the bearing tables are greater than Fa / Fr > e= 0.18, X = 0.67, Y2 = 5.50.

124 =3.63 10 Therefore the basic rated life, L10h , from Table 3.1 f h=0.293×

10/3

L10h =500×3.63

Pri = XFri +Y2 Fai = 0.67Fri + 5.50Fai From formula (4.12) the mean load, Fm, is:

And next, allowable axial load of cylindrical roller bearing is shown in page B-79.

10/3

・ni・φi)3/10 〕 =48.1kN{4,906kgf} i φi ) Σ (n・

Σ (Pri

Fm = 〔

≒37,000

In formula (1) on page B-79, based on NUP312 from Table 4 on page B-79, k = 0.065.

Table 4.7 Condition No. i

Equivalent radial load. Pri kN{ kgf }

1 2 3 4 5

17.7{ 1805 } 30.0{ 3060 } 46.4{ 4733 } 55.3{ 5641 } 75.1{ 7660 }

(60+130) /2=95mm,n=2,000 min-1 d p= Take into consideration that intermittent axial load. 4

4

dp・n×10 =19×10 4 In Fig. 1 on page B-79, dp・n = 19×10 . In the case of intermittent axial load, allowable surface pressure at the lip Pt = 40 MPa. Therefore the allowable axial load, Pt, following 2

Pz =0.065×60 ×40=9,360N{954kgf} Based on Table 4 of page B-79, it is within the limits of Fa max < 0.4×10,000 = 4,000 N. Therefore Pt < 4,000 N {408 kgf}.

A-29


●Boundary Dimensions and Bearing Number Codes 5. Boundary Dimensions and Bearing Number Codes bearing internal construction dimensions are not covered by these dimensions. For metric series rolling bearings there are 90 standardized bore diameters (d) ranging in size from 0.6mm - 2,500mm. Outer diameter dimensions (D) for radial bearings with standardized bore diameter dimensions are covered in the "diameter series;" their corresponding width dimensions (B) are covered in the "width series." For thrust bearings there is no width series; instead, these dimensions are covered in the "height series." The combination of all these series is known as the "dimension series." All series numbers are shown in Table 5.1. Although many rolling bearing dimensions are standardized, and have been listed here for purposes of

5.1 Boundary dimensions A rolling bearing's major dimensions, known as "boundary dimensions," are shown in Figs. 5.1 - 5.3. To facilitate international bearing interchangeability and economical bearing production, bearing boundary dimensions have been standardized by the International Standards Organization (ISO). In Japan, rolling bearing boundary dimensions are regulated by Japanese Industrial Standards (JIS B 1512). Those boundary dimensions which have been standardized include: bearing bore diameter, outside diameter, width/height, and chamfer dimensions - all important dimensions when considering the compatibility of shafts, bearings, and housings. However, as a general rule, T

B r

r r1

C φd1

r1

r

r

r

φd r

r

r

r

r

r r φd φD

T

r

φd φD

E B

φD

α

Fig. 5.1 Radial bearings (excluding tapered roller bearings)

r

φD1

Fig. 5.2 Tapered roller bearings

Fig. 5.3 Single direction thrust bearings

Table 5.1 Dimension series numbers Dimension series Diameter series (outer diameter dimensions) Radial bearings (excluding tapered roller bearings)

Width series (width dimensions)

Height series Reference (height dimensions) diagram

number 7, 8, 9, 0, 1, 2, 3, 4 8, 0, 1, 2, 3, 4, 5, 6 dimensions small number

Tapered roller bearings

large small

9, 0, 1, 2, 3

dimensions small number

Thrust bearings

0, 1, 2, 3

large

small

Diagram 5.5

large

0, 1, 2, 3, 4

dimensions small

Diagram 5.4

large

7, 9, 1, 2

large

small

Diagram 5.6

large Dimension Diameter series series

0

1

2

3

4

5

6 01 2 3

4

4

3

70 71 72 73

7

60

69

68

58 59 50

41 42

48 49 40

33

24

23

38 39 30 31 32

21

29 20 22

74

28

04

82

Dimension series

18 19 10 12 11 13

83

2 1 0 9 8

08 09 00 01 02 03

Diameter series

8

Height series

Width series

90 92

91 93

9

94 10 11 12

Fig. 5.4 Dimension series for radial bearings (excluding tapered roller bearings; diameter series 7 has been omitted)

1

13 14

3

Diameter series

2 1 0 9

22 2

Fig. 5.5 Dimension series for tapered roller bearings

A-30

2

1

0

3

0 2

3

2

2

Width series

3

23

24

Fig. 5.6 Dimension series for thrust bearings (excluding diameter series 5)


●Boundary Dimensions and Bearing Number Codes

future standardization, there are many standard bearing dimensions which are not presently manufactured.

"basic number" followed by "supplementary codes." The makeup and order of bearing numbers is shown in Table 5.2.

Boundary dimensions for radial bearings (excluding tapered roller bearings) are shown in the attached tables.

The basic number indicates general information about a bearing, such as its fundamental type, boundary dimensions, series number, bore diameter code and contact angle. The supplementary codes derive from prefixes and suffixes which indicate a bearing's tolerances, internal clearances, and related specifications.

5.2 Bearing numbers Rolling bearing part numbers indicate bearing type, dimensions, tolerances, internal construction, and other related specifications. Bearing numbers are comprised of a

(Bearing number examples)

6205ZZC3/2AS

23034BD1 Lubrication hole/lubrication groove (when outer diameter is less than 320mm) Type B Nominal bore diameter 170mm Dimension series 0 Width series 3 Spherical roller bearing

Shell Alvania S2 grease Radial internal clearance C3 Shielded (both) Nominal bore diameter 25mm Diameter series 2 Deep groove ball bearing

240/750BK30

7012BDB/GMP6

Bore diameter: tapered inner ring bore, standard taper ratio 1:30

Tolerances JIS Class 6 Medium preload Back-to-back duplex arrangement Contact angle 40° Nominal bore diameter 60mm Dimension series 0 Angular contact ball bearing

NU320G1C3

Type B Bore diameter 750mm Dimension series 0 Width series 4 Spherical roller bearing

51120L1P5 Radial internal clearance C3 High strength machined brass rivetless cage with square holes

Tolerances JIS Class 5 High strength, machined brass cage

Nominal bore diameter 100mm Dimension series 3 Cylindrical roller bearing NU type

Nominal bore diameter 100mm Diameter series 1 Height series 1 Thrust ball bearing

4T−30208 Nominal bore diameter 40mm Diameter series 2 Width series 0 Tapered roller bearing Spec. 4T

A-31


●Boundary Dimensions and Bearing Number Codes

Table 5.2 Bearing number composition and arrangement Basic number Supplementary prefix code Special application/material/ heat treatment code 4T: ET:

4T tapered roller bearings ET tapered roller bearings

ETA: ET+special heat treatment E:

Bearing using case hardened steel

EA:

Bearing made of nitride-treated case hardened steel

TA:

Bearing made of nitride-treated bearing steel (SUJ3)

TM:

Bearing made of special heat-treated bearing steel (SUJ3)

F:

Stainless steel bearings

N:

High speed steel bearings

M:

Plated bearings

5S:

Ceramic rolling element bearings

HL:

HL roller bearings

ECO: ECO-Top tapered roller bearings LH:

Bearing made of bearing steel that provides long life at high temperatures (STJ2), which is treated to stabilize dimensions at temperatures up to 250°C

TS3:

Dimension stabilized bearing for high temperature use (to 200°C)

TS4:

Dimension stabilized bearing for high temperature use (to 250°C)

Bearing series Bearing series code

Dimension series code 1

Width/height series

Diameter series

Deep groove ball bearings (type code 6) 68 69 60 62 63

(1) (1) (1) (0) (0)

8 9 0 2 3

Angular contact ball bearings (type code 7) 78 79 70 72 73

(1) (1) (1) (0) (0)

8 9 0 2 3

Self-aligning ball bearings (type code 1,2) 12 13 22 23

(0) (0) (2) (2)

2 3 2 3

Cylindrical roller bearings (type code NU, N, NF, NNU, NN, etc.) NU10 NU2 NU22 NU3 NU23 NU4 NNU49 NN30

1 (0) 2 (0) 2 (0) 4 3

0 2 2 3 3 4 9 0

Tapered roller bearings (type code 3) 329X 320X 302 322 303 303D 313X 323

2 2 0 2 0 0 1 2

9 0 2 2 3 3 3 3

Bore diameter code bore Code diameter mm

/0.6 /1.5 /2.5

0.6 1.5 2.5

1

1

9

9

00 01 02 03

10 12 15 17

/22 /28 /32

22 28 32

04 05 06

20 25 30

88 92 96

440 460 480

/500 /530 /560

500 530 560

/2,360 /2,500

2,360 2,500

Contact angle code 1

Code

Contact angle

Angular contact ball bearings (A) Standard contact angle 30˚ B Standard contact angle 40˚ Standard contact angle 15˚ C Tapered roller bearings (B) Contact angle over 10˚ C to/including 17˚ D Contact angle over 17˚ to/including 24˚ Contact angle over 24˚ to/including 32˚

Spherical roller bearings (type code 2) 239 230 240 231 241 222 232 213 223

3 3 4 3 4 2 3 1 2

9 0 0 1 1 2 2 3 3

Single direction thrust ball bearings (type code 5) 511 512 513 514

1 1 1 1

1 2 3 4

Cylindrical roller thrust bearings (type code 8) 811 812 893

1 1 9

1 2 3

Spherical thrust roller bearings (type code 2) 292 9 2 293 9 3 294 9 4

1 Codes in ( ) are not shown in nominal numbers. Note: Please consult NTN Engineering concerning bearing series codes, and supplementary prefix/suffix codes not listed in the above table.

A-32


●Boundary Dimensions and Bearing Number Codes

Supplementary suffix codes Internal modifications code U: Internationally interchangeable tapered roller bearings R: Noninternationally interchangeable tapered roller bearings ST: Low torque tapered roller bearings HT: High axial load use cylindrical roller bearings

1

cage code

Seal / Shield code

External configuration code

Duplex Internal clearance arrangement code /preload code

L1: High strength, machined brass cage

LLB: Synthetic rubber seal (noncontact type)

K: Tapered inner ring bore, standard taper ratio 1:12

DB: Back-to-back arrangement

F1: Machined carbon steel cage G1: High strength machined brass rivetless cage with square holes, G2: Pin type cage J: Pressed steel cage T2: Plastic mold cage

LLU: Synthetic rubber K30: seal Tapered inner (contact type) ring bore, standard taper LLH: ratio 1:30 Synthetic rubber seal N: (low-torque type) With snap ring groove ZZ: Steel shield NR: With snap ring D: With oil hole D1: Lubrication hole/lubrication groove

DF: Face-to-face arrangement DT: Tandem arrangement D2: Two matched, paired bearings

C2: Internal clearance less than normal (CN): Normal clearance C3: Internal clearance greater than normal

C4: Internal G: Flush ground clearance greater than C3 +α: Spacer C5: (α= spacer’s Internal standard width clearance dimensions) greater than C4 CM: Radial internal clearance for electric motor use /GL: Light preload /GN: Normal preload /GM: Medium preload /GH: Heavy preload

A-33

Tolerance code Lubrication code P6: JIS Class 6 P5: JIS Class 5 P4: JIS Class 4 P2: JIS Class 2 2: ABMA Class 2 3: ABMA Class 3 0: ABMA Class 0 00: ABMA Class 00

/2AS: Shell Alvania S2 grease /3AS: Shell Alvania S3 grease /8A: Shell Alvania EP2 grease /5K: MULTEMP SRL /LX11: Barierta JFE552 /LP03: Thermosetting grease (grease for poly-lube bearings)


●Bearing Tolerances 6. Bearing Tolerances Running accuracy Running accuracy constitutes the acceptable values for inner and outer ring radial runout and axial runout, inner ring side runout, and outer ring outer diameter runout. Allowable rolling bearing tolerances have been established according to precision classes. Bearing precision is stipulated as JIS class 6, class 5, class 4, or class 2, with precision rising from ordinary precision indicated by class 0. Table 6.1 indicates which standards and precision classes are applicable to the major bearing types. Table 6.2 shows a relative comparison between JIS B 1514 precision class standards and other standards. For greater detail on allowable limitations and values, refer to Tables 6.3 - 6.8. Allowable values for chamfer dimensions are shown in Table 6.9, and allowable limitations and values for radial bearing inner ring tapered bores are shown in Table 6.10.

6.1 Dimensional accuracy and running accuracy Bearing “tolerances” or dimensional accuracy and running accuracy, are regulated by ISO and JIS B 1514 standards (rolling bearing tolerances). For dimensional accuracy, these standards prescribe the tolerances necessary when installing bearings on shafts or in housings. Running accuracy is defined as the allowable limits for bearing runout during operation. Dimensional accuracy Dimensional accuracy constitutes the acceptable values for bore diameter, outer diameter, assembled bearing width, and bore diameter uniformity as seen in chamfer dimensions, allowable inner ring tapered bore deviation and shape error. Also included are, average bore diameter variation, outer diameter variation, average outer diameter unevenness, as well as raceway width and height variation (for thrust bearings).

Table 6.1 Bearing types and applicable tolerance Bearing type

Applicable standard

Tolerance table

Tolerance class

Deep groove ball bearings

class 0

class 6

class 5

class 4

class 2

Angular contact ball bearings

class 0

class 6

class 5

class 4

class 2

Self-aligning ball bearings

class 0

class 0

class 6

class 5

class 4 class 2

Needle roller bearings

class 0

class 6

class 5

class 4

Spherical roller bearings

class 0

JIS B 1514 (ISO492)

Cylindrical roller bearigns

Tapered roller bearings

Table 6.3

metric

JIS B 1514

class 0,6X

class 6

class 5

class 4

Table 6.4

Inch

ANSI/ABMA Std.19

class 4

class 2

class 3

class 0

class 00

Table 6.5

J series

ANSI/ABMA Std.19.1

class K

class N

class C

class B

class A

Table 6.6

JIS B 1514 (ISO199)

class 0

class 6

class 5

class 4

Table 6.7

class 0

Table 6.8

Thrust ball bearings Spherical roller thrust bearings

Table 6.2 Comparison of tolerance classifications of national standards Standard Japanese industrial standard (JIS)

International Organization for Standardization (ISO)

Applicable standerd

Tolerance Class Class 0,6X

Class 6

Class 5

Class 4

Class 2

All type

ISO 492

Normal class Class 6X

Class 6

Class 5

Class 4

Class 2

Radial bearings

ISO 199

Normal Class

Class 6

Class 5

Class 4

ISO 578

Class 4

Class 3

Class 0 Class 00 Tapered roller bearings (Inch series)

Class 5A Class 4A

P0

P6

JIS B 1514

ISO 1224 Deutsches Institut fur Normung(DIN)

American National Standards Institute (ANSI) American Bearing Manufacturer's Association (ABMA)

Bearing Types

DIN 620 1

P5

P4

Thrust ball bearings

Precision instrument bearings

P2

All type

ABEC-3 ABEC-5 ABEC-7 ABEC-9 RBEC-3 RBEC-5

Radial bearings (Except tapered roller bearings)

Class K

Class N Class C Class B

Tapered roller bearings (Metric series)

Class 4

Class 2

ANSI/ABMA Std.20

ABEC-1 RBEC-1

ANSI/ABMA Std.19.1 ANSI/ABMA Std.19

Class 3

Class 0 Class 00 Tapered roller bearings (Inch series)

1 "ABEC" is applied for ball bearings and "RBEC" for roller bearings. Notes 1: JIS B 1514, ISO 492 and 199, and DIN 620 have the same specification level. 2: The tolerance and allowance of JIS B 1514 are a little different from those of ABMA standards.

A-35

Class A


●Bearing Tolerances

Table 6.3 Tolerance of radial bearings (Except tapered roller bearings) Table 6.3 (1) Inner rings  Nominal   bore  diameter

Vdp

∆dmp

   d  

Bore diameter variation

Dimensional tolerance of mean bore diameter within plane

diameter series 9

mm class 0

over

incl.

high

class 6

class 5

class 4

low high

1

class 2

1

diameter series 0.1

low high

low high

0.6 4 2.5 10

2.5 10 18

0 0 0

-8 -8 -8

0 0 0

-7 -7 -7

0 0 0

-5 -5 -5

0 0 0

-4 -4 -4

0 0 0

-2.5 -2.5 -2.5

10 10 10

9 9 9

5 5 5

4 2.5 4 2.5 4 2.5

18 30 50

30 50 80

0 0 0

-10 -12 -15

0 0 0

-8 -10 -12

0 0 0

-6 -8 -9

0 0 0

-5 -6 -7

0 0 0

-2.5 -2.5 -4

13 10 15 13 19 15

6 8 9

5 2.5 6 2.5 7 4

80 120 150

120 150 180

0 0 0

-20 -25 -25

0 0 0

-15 -18 -18

0 0 0

-10 -13 -13

0 0 0

-8 -10 -10

0 0 0

-5 -7 -7

180 250 315

250 315 400

0 0 0

-30 -35 -40

0 0 0

-22 -25 -30

0 0 0

-15 -18 -23

0 ー ー

-12 ー ー

0 ー ー

400 500 630

500 630 800

0 0 0

-45 -50 -75

0 0 ー

-35 -40 ー

ー ー ー

ー ー ー

ー ー ー

ー ー ー

800 1 000 1 250 1 600

1 000 1 250 1 600 2 000

0 0 0 0

-100 -125 -160 -200

ー ー ー ー

ー ー ー ー

ー ー ー ー

ー ー ー ー

ー ー ー ー

ー ー ー ー

low high

diameter series 2.3.4

class class class class class class class class class class class class class class class 0 6 5 4 2 0 6 5 4 2 0 6 5 4 2

max

low

max

max

7 7 7

4 4 4

3 3 3

2.5 2.5 2.5

6 6 6

5 5 5

4 4 4

3 3 3

2.5 2.5 2.5

10 8 12 10 19 15

5 6 7

4 5 5

2.5 8 2.5 9 4 11

6 8 9

5 6 7

4 5 5

2.5 2.5 4

25 19 10 8 5 31 23 13 10 7 31 23 13 10 7

25 19 8 31 23 10 31 23 10

6 8 8

5 7 7

15 11 8 19 14 10 19 14 10

6 8 8

5 7 7

-8 ー ー

38 28 15 12 8 44 31 18 ー ー 50 38 23 ー ー

38 28 12 9 8 44 31 14 ー ー 50 38 18 ー ー

23 17 12 9 8 26 19 14 ー ー 30 23 18 ー ー

ー ー ー

ー ー ー

56 44 ー ー ー 63 50 ー ー ー ー ー ー ー ー

56 44 ー ー ー 63 50 ー ー ー ー ー ー ー ー

34 26 ー ー ー 38 30 ー ー ー ー ー ー ー ー

ー ー ー ー

ー ー ー ー

ー ー ー ー

ー ー ー ー

ー ー ー ー

ー ー ー ー

ー ー ー ー

ー ー ー ー

ー ー ー ー

8 8 8

ー ー ー ー

ー ー ー ー

ー ー ー ー

ー ー ー ー

ー ー ー ー

ー ー ー ー

ー ー ー ー

ー ー ー ー

1 The dimensional difference ∆ds of bore diameter to applied for class 4 and 2 is the same as the tolerance of dimentional difference ∆dmp of average bore diameter. However, the dimensional difference is applied to diameter series 0, 1, 2, 3 and 4 against Class 4, and to all the diameter series against Class 2.

Table 6.3 (2) Outer rings  Nominal  outside  diameter

open type

     

diameter series 9

mm class 0

over

VDp

∆Dmp

   D  

Outside diameter variation 6

Dimensional tolerance of mean outside diameter within plane

class 6

class 5

class 4

5

class 2

5

incl.

high

6 18 30

0 0 0

-8 -8 -9

0 0 0

-7 -7 -8

0 0 0

-5 -5 -6

0 0 0

-4 -4 -5

0 0 0

-2.5 -2.5 -4

10 9 10 9 12 10

30 50 80

50 80 120

0 0 0

-11 -13 -15

0 0 0

-9 -11 -13

0 0 0

-7 -9 -10

0 0 0

-6 -7 -8

0 0 0

-4 -4 -5

14 11 7 16 14 9 19 16 10

120 150 180

150 180 250

0 0 0

-18 -25 -30

0 0 0

-15 -18 -20

0 0 0

-11 -13 -15

0 0 0

-9 -10 -11

0 0 0

-5 -7 -8

250 315 400

315 400 500

0 0 0

-35 -40 -45

0 0 0

-25 -28 -33

0 0 0

-18 -20 -23

0 0 ー

-13 -15 ー

0 -8 0 -10 ー ー

500 630 800

630 800 1 000

0 0 0

-50 -75 -100

0 0 0

-38 -45 -60

0 0 ー

-28 -35 ー

ー ー ー

ー ー ー

ー ー ー

ー ー ー

1 000 1 250 1 600 2 000

1 250 1 600 2 000 2 500

0 0 0 0

-125 -160 -200 -250

ー ー ー ー

ー ー ー ー

ー ー ー ー

ー ー ー ー

ー ー ー ー

ー ー ー ー

ー ー ー ー

ー ー ー ー

2.5 6 18

8

low high

low high

low high

low high

diameter series 0.1

diameter series 2.3.4

class class class class class class class class class class class class class class class 0 6 5 4 2 0 6 5 4 2 0 6 5 4 2

max

low

5 5 6

max 4 2.5 4 2.5 5 4

7 7 8

4 4 5

3 2.5 3 2.5 4 4

11 9 13 11 19 16

5 7 8

23 19 11 9 5 31 23 13 10 7 38 25 15 11 8

23 19 8 31 23 10 38 25 11

44 31 18 13 8 50 35 20 15 10 56 41 23 ー ー

44 31 14 10 8 50 35 15 11 10 56 41 17 ー ー

6 4 7 4 8 5

8 8 9

max 5 5 6

4 4 5

3 3 4

2.5 2.5 4

5 4 5 4 6 5

8 7 10 8 11 10

5 7 8

5 5 6

4 4 5

7 5 8 7 8 8

14 11 8 19 14 10 23 15 11

7 8 8

5 7 8

63 48 28 ー ー 63 48 21 ー 94 56 35 ー ー 94 56 26 ー 125 75 ー ー ー 125 75 ー ー ー ー ー ー

ー ー ー ー

ー ー ー ー

ー ー ー ー

ー ー ー ー

ー ー ー ー

ー ー ー ー

ー ー ー ー

ー ー ー ー

6 6 7

26 19 14 10 8 30 21 15 11 10 34 25 17 ー ー

ー ー ー

38 29 21 ー ー 55 34 26 ー ー 75 45 ー ー ー

ー ー ー ー

ー ー ー ー

ー ー ー ー

ー ー ー ー

ー ー ー ー

5 The dimensional difference ∆Ds of outer diameter to be applied for classes 4 and 2 is the same as the tolerance of dimensional difference ∆Dmp of average outer diameter. However, the dimensional difference is applied to diameter series 0, 1, 2, 3 and 4 against Class 4, and also to all the diameter series against Class 2.

A-36

ー ー ー ー


●Bearing Tolerances

Unitμm

Mean bore diameter variation

Inner ring radial runout

Side runout with bore

Vdmp

Kia

Sd

Inner ring axial runout Sia

Inner ring width deviation

VBs

2

normal class class class class class 0 6 5 4 2

class class class class class 0 6 5 4 2

class class class 5 4 2

class class class 5 4 2

max

max

max

max

6 6 6

5 5 5

3 2 3 2 3 2

8 9 11

6 8 9

3 2.5 1.5 4 3 1.5 5 3.5 2 5 4 7 5 7 5

15 11 19 14 19 14

1.5 1.5 1.5

2.5 3.5 3.5

Inner ring width variation

∆Bs

class 0,6 high

class 5,4

modified

3

class 2 class 0,6 class 5,4

low high low high low

class class class class class 0 6 5 4 2

high low high low

max

4 2.5 1.5 4 2.5 1.5 4 2.5 1.5

7 7 7

3 1.5 3 1.5 3 1.5

7 7 7

3 3 3

1.5 1.5 1.5

0 0 0

-40 0 -120 0 -120 0

-40 ー ー -40 0 -250 -80 0 -250

0 -250 0 -250 0 -250

12 12 5 2.5 1.5 15 15 5 2.5 1.5 20 20 5 2.5 1.5

13 8 15 10 20 10

4 3 5 4 5 4

2.5 2.5 2.5

8 8 8

4 1.5 4 1.5 5 1.5

8 8 8

4 4 5

2.5 2.5 2.5

0 0 0

-120 0 -120 0 -120 0 -250 -120 0 -120 0 -120 0 -250 -150 0 -150 0 -150 0 -380

0 -250 0 -250 0 -250

20 20 5 2.5 1.5 20 20 5 3 1.5 25 25 6 4 1.5

25 13 30 18 30 18

6 5 8 6 8 6

2.5 2.5 5

9 10 10

5 2.5 6 2.5 6 4

9 10 10

5 7 7

2.5 2.5 5

0 0 0

-200 0 -200 0 -200 0 -380 -250 0 -250 0 -250 0 -500 -250 0 -250 0 -250 0 -500

0 -380 0 -380 0 -380

25 25 7 4 30 30 8 5 30 30 8 5

10 10 10

5 6 7

-40 0 -40 0 -80 0

2.5 2.5 4

23 17 8 6 4 26 19 9 ー ー 30 23 12 ー ー

40 20 10 8 5 50 25 13 ー ー 60 30 15 ー ー

11 7 5 13 ー ー 15 ー ー

13 15 20

8 5 ー ー ー ー

0 0 0

-300 0 -300 0 -300 0 -500 -350 0 ー ー ー 0 -500 -400 0 ー ー ー 0 -630

0 -500 0 ー 0 ー

30 30 10 6 5 35 35 13 ー ー 40 40 15 ー ー

34 26 ー 38 30 ー 55 ー ー

ー ー ー

ー ー ー

65 35 ー 70 40 ー 80 ー ー

ー ー ー ー ー ー

ー ー ー

ー ー ー ー ー ー

ー ー ー

ー ー ー

ー ー ー

0 0 0

-450 ー ー -500 ー ー ー ー ー

50 45 ー ー 60 50 ー ー 70 ー ー ー

ー ー ー ー ー ー ー ー

ー ー ー ー

ー 90 ー ー ー 100 ー ー ー 120 ー ー ー 140 ー ー

ー ー ー ー

ー ー ー ー

ー ー ー ー

ー ー ー ー

ー ー ー ー

ー ー ー ー

0 0 0 0

75 94 120 150

ー ー ー ー

ー ー ー ー

ー ー ー ー

ー ー ー ー

ー ー ー ー

ー ー ー

ー ー ー

ー ー ー

ー ー ー

ー ー ー ー ー ー

ー ー ー ー

ー ー ー ー

ー ー ー ー

ー ー ー ー

ー ー ー ー

ー ー ー ー

80 100 120 140

ー ー ー ー

ー ー ー ー

ー ー ー ー

ー ー ー ー ー ー ー

2 Applies to ball bearings such as deep groove ball bearings and angular ball bearings. 3 To be applied for individual raceway rings manufactured for combined bearing use. 4 Nominal bore diameter of bearings of 0.6 mm is included in this dimensional division. Unit μm

Outside diameter variation VDP 6 Sealed/shield bearings diameter series 2,3,4    0,1,2,3,4 class 0 class 6 max 10 10 12

9 9 10

16 20 26

Mean bore diameter variation VDmp

Outer ring radial runout Outside surface inclination Kea

Outside ring axial runout Sea 7

SD

Outer ring width deviation

Outer ring width variation VCs

∆Cs class 0

class 6

class 5

class 4

class 2

class 0

class 6

8 8 9

max 6 6 7

class 5

class 4

class 2

class 5

max

class 4

class 2

class 5

max

class 4

class 0,6

class 2

all type

max

class 5

class 4

class 2

max 5 2.5 1.5 5 2.5 1.5 5 2.5 1.5

5 5 6

3 3 3

2 1.5 2 1.5 2.5 2

15 15 15

5 5 6

3 3 4

1.5 1.5 2.5

8 8 8

4 4 4

1.5 1.5 1.5

8 8 8

5 5 5

1.5 1.5 2.5

13 16 20

8 7 10 8 11 10

4 5 5

3 2 3.5 2 4 2.5

20 10 7 25 13 8 35 18 10

5 5 6

2.5 4 5

8 8 9

4 4 5

1.5 1.5 2.5

8 10 11

5 5 6

2.5 4 5

30 38 ―

25 30 ―

14 11 19 14 23 15

6 7 8

5 5 6

2.5 3.5 4

40 20 11 7 45 23 13 8 50 25 15 10

5 5 7

10 10 11

5 5 7

2.5 2.5 4

13 14 15

7 8 10

5 5 7

― ― ―

― ― ―

26 19 9 30 21 10 34 25 12

7 8 ―

4 5 ―

60 30 18 11 70 35 20 13 80 40 23 ―

7 8 ―

13 13 15

8 10 ―

5 7 ―

18 20 23

10 13 ―

7 8 ―

11 7 5 13 8 7 15 ― ―

― ― ―

― ― ―

38 29 14 55 34 18 75 45 ―

― ― ―

― ― ―

100 50 25 ― 120 60 30 ― 140 75 ― ―

― ― ―

18 20 ―

― ― ―

― ― ―

25 30 ―

― ― ―

― ― ―

18 ― ― 20 ― ― ― ― ―

― ― ― ―

― ― ― ―

― ― ― ―

― ― ― ―

― ― ― ―

160 190 220 250

― ― ― ―

― ― ― ―

― ― ― ―

― ― ― ―

― ― ― ―

― ― ― ―

― ― ― ―

― ― ― ―

― ― ― ―

― ― ― ―

― ― ― ―

― ― ― ―

― ― ― ―

6 To be applied in case snap rings are not installed on the bearings. 7 Applies to ball bearings such as deep groove ball bearings and angular ball bearings. 8 Nominal outer diameter of bearings of 2.5 mm is included in this dimensional division.

A-37

Depends on tolerance of ∆Bs in relation to d of same bearing

Depends on tolerance of ∆Bs in relation to d of same bearing

5 2.5 1.5 6 3 1.5 8 4 2.5 8 5 8 5 10 7

― ― ― ―

2.5 2.5 4

― ― ― ―


●Bearing Tolerances

Table 6.4 Tolerance of tapered roller bearings (Metric series) Table 6.4 (1) Inner rings  Nominal   bore  diameter

∆dmp

   d  

Bore diameter variation

Dimensional tolerance of mean bore diameter within plane

Mean bore diameter variation

Vdp

Inner ring radial runout Kia

Vdmp

Side runout with bore Sd

mm

over   incl.

1

class 0,6X

class 5,6

class 4

high low

high low

high low

class 0,6X

class 6

class 5

class 4

class 0,6X

class 6

max

class 5

class 4

class 0,6X

class 6

max

class 5

class 4

max

class class 5 4

max

10 18 30

18 30 50

0 0 0

-12 -12 -12

0 0 0

-7 -8 -10

0 0 0

-5 -6 -8

12 12 12

7 8 10

5 6 8

4 5 6

9 9 9

5 6 8

5 5 5

4 4 5

15 18 20

7 8 10

5 5 6

3 3 4

7 8 8

3 4 4

50 80 120

80 120 180

0 0 0

-15 -20 -25

0 0 0

-12 -15 -18

0 0 0

-9 -10 -13

15 20 25

12 15 18

9 11 14

7 8 10

11 15 19

9 11 14

6 8 9

5 5 7

25 30 35

10 13 18

7 8 11

4 5 6

8 9 10

5 5 6

180 250 315

250 315 400

0 0 0

-30 -35 -40

0 ― ―

-22 ― ―

0 ― ―

-15 ― ―

30 35 40

22 ― ―

17 ― ―

11 ― ―

23 26 30

16 ― ―

11 ― ―

8 ― ―

50 60 70

20 ― ―

13 ― ―

8 ― ―

11 ― ―

7 ― ―

400 500 630

500 630 800

― ― ―

― ― ―

― ― ―

― ― ―

― ― ―

― ― ―

― ― ―

― ― ―

― ― ―

― ― ―

― ― ―

― ― ―

― ― ―

― ― ―

― ― ―

― ― ―

― ― ―

― ― ―

― ― ―

― ― ―

800 1,000

1 The dimensional difference ∆ds of bore diameter to be applied for class 4 is the same as the tolerance of dimensional difference ∆dmp of average bore diameter.

Table 6.4 (2) Outer rings  Nominal   outside  diameter

Dimensional tolerance of mean outside diameter within plane

Outside diameter variation

Mean bore diameter variation

∆Dmp

VDp

VDmp

   D  

Outer ring radial runout Kea

Outside surface inclination SD

mm class 0,6X

class 5,6

class 4

3

class 0,6X

class 6

class 5

class 4

class 0,6X

class 6

class 5

class 4

class 0,6X

class 6

class 5

class 4

2

class class 5 4

over

incl.

18 30 50

30 50 80

0 0 0

-12 -14 -16

0 0 0

-8 -9 -11

0 0 0

-6 -7 -9

12 14 16

8 9 11

6 7 8

5 5 7

9 11 12

6 7 8

5 5 6

4 5 5

18 20 25

9 10 13

6 7 8

4 5 5

8 8 8

4 4 4

80 120 150

120 150 180

0 0 0

-18 -20 -25

0 0 0

-13 -15 -18

0 0 0

-10 -11 -13

18 20 25

13 15 18

10 11 14

8 8 10

14 15 19

10 11 14

7 8 9

5 6 7

35 40 45

18 20 23

10 11 13

6 7 8

9 10 10

5 5 5

180 250 315

250 315 400

0 0 0

-30 -35 -40

0 0 0

-20 -25 -28

0 0 0

-15 -18 -20

30 35 40

20 25 28

15 19 22

11 14 15

23 26 30

15 19 21

10 13 14

8 9 10

50 60 70

25 30 35

15 18 20

10 11 13

11 13 13

7 8 10

400 500

500 630

0 0

-45 -50

― ―

― ―

― ―

― ―

45 50

― ―

― ―

― ―

34 38

― ―

― ―

― ―

80 100

― ―

― ―

― ―

― ―

― ―

high low

high low high low

max

max

max

max

2 Does not apply to bearings with flange. 3 The dimensional difference ∆Ds of outside diameter to be applied for class 4 is the same as the tolerance of dimensional difference DDmp of average outside diameter.

A-38


●Bearing Tolerances

Unitμm

Inner ring width deviation

Inner ring axial runout

Combination width deviation of double row bearings

Assembly width deviation of single-row tapered roller bearings

∆Bs

               ∆Ts

∆B1s,

Sia class 4 max

class 0,6

class 6X

class 4,5

high low

high low

class 0,6

class 6X

class 4,5

Combination width deviation of 4-row bearings

∆C1s

∆B2s,

class 0,6,5

∆C2s

class 0,6,5

high

low

high

low

high

low

high

low

high

low

high

low

3 4 4

0 0 0

-120 -120 -120

0 0 0

-50 -50 -50

0 0 0

-200 -200 -240

+200 +200 +200

0 0 0

+100 +100 +100

0 0 0

+200 +200 +200

-200 -200 -200

ー ー +240

ー ー -240

ー ー ー

ー ー ー

4 5 7

0 0 0

-150 -200 -250

0 0 0

-50 -50 -50

0 0 0

-300 -400 -500

+200 +200 +350

0 -200 -250

+100 +100 +150

0 0 0

+200 +200 +350

-200 -200 -250

+300 +400 +500

-300 -400 -500

ー +500 +600

ー -500 -600

8 ー ー

0 0 0

-300 -350 -400

0 0 0

-50 -50 -50

0 ー ー

-600 ー ー

+350 +350 +400

-250 -250 -400

+150 +200 +200

0 0 0

+350 ー ー

-250 ー ー

+600 +700 +800

-600 -700 -800

+750 +900 +1 000

-750 -900 -1 000

ー ー ー

ー ー ー

ー ー ー

ー ー ー ー ー ー

ー ー ー

ー ー ー

ー ー ー

ー ー ー

ー ー ー

ー ー ー

ー ー ー

ー ー ー

+900 +1 000 +1 500

-900 -1 000 -1 500

+1 200 +1 200 +1 500

-1 200 -1 200 -1 500

ー ー

+1 500

-1 500

+1 500

-1 500

Unitμm

Outer ring axial runout

Outer ring width deviation ∆Cs

Sea

class 4

class 0,6,5,4

class 6X

4

Table 6.4 (3) Effective width of outer and inner rings with roller Unitμm  Nominal   bore  diameter

Effective width deviation of roller and inner ring assembly of tapered roller bearing

   d

      ∆T1s

Tapered roller bearing outer ring effective width deviation ∆T2s

  mm class 0

class 6X

class 0

class 6X

inf.

over

incl.

high

low

high

low

high

low

0 0 0

-100 -100 -100

10 18 30

18 30 50

+100 +100 +100

0 0 0

+50 +50 +50

0 0 0

+100 +100 +100

0 0 0

+50 +50 +50

0 0 0

0 0 0

-100 -100 -100

50 80 120

80 120 180

+100 +100 +150

0 -100 -150

+50 +50 +50

0 0 0

+100 +100 +200

0 -100 -100

+50 +50 +100

0 0 0

10 10 13

0 0 0

-100 -100 -100

180 250 315

250 315 400

+150 +150 +200

-150 -150 -200

+50 +100 +100

0 0 0

+200 +200 +200

-100 -100 -200

+100 +100 +100

0 0 0

― ―

0 0

-100 -100

max 5 5 5 6 7 8

sup.

inf. sup.

Depends on tolerance of ∆Bs in relation to d of same bearing

4 Applies to bearing where d is greater than 10 mm but is less than or equal to 400 mm.

T1

Master cup sub-unit

φd

A-39

T2

high low

Master cone sub-unit

φd


●Bearing Tolerances

Table 6.5 Tolerance of tapered roller bearings (Inch series) Table 6.5 (1) Inner rings

Unitμm

Nominal bore diameter

Single bore diameter deviation

d

 ∆ds  

mm (inch) over

incl.

  Class 2

Class 4

  Class 3

  Class 0

Class 00

high

low

high

low

high

low

high

low

high

low

76.2 ( 3 ) 266.7 (10.5) 304.8 (12 )

+13 +25 +25

0 0 0

+13 +25 +25

0 0 0

+13 +13 +13

0 0 0

+13 +13 +13

0 0 0

+8 +8 ―

0 0 ―

304.8 (12 ) 609.6 (24 ) 609.6 (24 ) 914.4 (36 ) 914.4 (36 ) 1 219.2 (48 )

+51 +76 +102

0 0 0

+51 ― ―

0 ― ―

+25 +38 +51

0 0 0

― ― ―

― ― ―

― ― ―

― ― ―

+127

0

+76

0

− 76.2 ( 3 ) 266.7 (10.5)

1 219.2 (48 )

Table 6.5 (2) Outer rings

Unitμm

Nominal outside diameter

Single outside diameter deviation

D

∆Ds

mm (inch)

Class 2

Class 4

Class 3

  Class 0

Class 00

over

incl.

high

low

high

low

high

low

high

low

high

low

− 266.7 (10.5) 304.8 (12 )

266.7 (10.5) 304.8 (12 ) 609.6 (24 )

+25 +25 +51

0 0 0

+25 +25 +51

0 0 0

+13 +13 +25

0 0 0

+13 +13 ― 

0 0 ―

+8 ―  ― 

0 ― ―

609.6 (24 ) 914.4 (36 ) 1 219.2 (48 )

914.4 (36 ) 1 219.2 (48 ) −

+76 +102 +127

0 0 0

+76 ―   ―  

0 ― ―

+38 +51 +76

0 0 0

―  ―  ― 

― ― ―

―  ―  ― 

― ― ―

Table 6.5 (3) Single-row tapered roller bearing assembly width, combination width of 4-row bearings, effective width of inner ring with rollers, effective width of outer ring Nominal bore diameter

Nominal outside diameter

d

D

mm (inch)

mm (inch)

Overall width deviation of assembled single row tapered roller bearing

∆B2s, ∆C2s   Class 4

over

incl.

over

101.6 ( 4) − 101.6 ( 4) 304.8 (12) 304.8 (12) 609.6 (24)

Overall width deviation of assembled 4-row tapered roller bearings

∆Ts

Class 2

Class 3

Class 0,00

Class 4,2,3,0

incl.

high

low

high

low

high

low

high

low

high

low

508.0 (20)

+203 +356 +381

0 -254 -381

+203 +203 +381

0 0 -381

+203 +203 +203

-203 -203 -203

+203 +203 ― 

-203 -203 ― 

+1 524 +1 524 +1 524

-1 524 -1 524 -1 524

+381 +381

-381 -381

+381 ― 

-381 ― 

+381 +381

-381 -381

―  ― 

―  ― 

+1 524 +1 524

-1 524 -1 524

304.8 (12) 609.6 (36) 508.0 (20) − 609.6 (24)

Table 6.5 (4) Radial deflection of inner and outer rings

Unitμm

Nominal outside diameter

Inner ring radial runout Kia

D

Outer ring radial runout Kea  

mm (inch)

Class 4

Class 2

Class 3

  Class 0

Class 00

max

over

incl.

― 304.8 (14) 609.6 (24)

304.8 (14) 609.6 (24) 914.4 (36)

51 51 76

38 38 51

8 18 51

4 ― ―

2 ― ―

914.4 (36)

76

76

A-40


●Bearing Tolerances

Master cup sub-unit

T1

Master cone sub-unit

T2

φd

φd

Unitμm

Effective width deviation of roller and inner ring assembly of tapered roller bearing

Tapered roller bearing outer ring effective width deviation ∆T2s

∆T1s

high

low

+102 +152 ― 

0 -152 ― 

―  ― 

―  ― 

high

low

+102 +102 +178

0 0 1 -178

―  ― 

―  ― 

high +102 +102 +102 ―  ― 

low

high +102 +203 ― 

0 -102 ― 

―  ― 

―  ― 

―  ― 

A-41

Class 3

Class 2

-102 -102 1 -102

1 To be applied for nominal bore diameters d of 406.400 mm (16 inch) or less.

  Class 4

Class 3

Class 2

Class 4

low

high

low

high

low

+102 +102 +203

0 0 1 -203

+102 +102 +102

-102 -102 1 -102

―  ― 

―  ― 

―  ― 

―  ― 


●Bearing Tolerances

Table 6.6 Tolerance of tapered roller bearings of J series (Metric series) Table 6.6 (1) Inner rings Nominal bore diameter

Mean bore diameter deviation

Bore diameter variation

∆dmp

Vdp

Mean bore diameter variation Vdmp

d mm

Class

Class

Class

Class

Class

Class

Class

Class

Class

Class

Class

Class

K

N

C

B

K

N

C

B

K

N

C

B

over

incl.

high

low

high

low

high

low

high

low

10 18 30

18 30 50

0 0 0

-12 -12 -12

0 0 0

-12 -12 -12

0 0 0

-7 -8 -10

0 0 0

-5 -6 -8

12 12 12

12 12 12

max 4 4 4

3 3 3

9 9 9

9 9 9

max 5 5 5

4 4 5

50 80 120

80 120 180

0 0 0

-15 -20 -25

0 0 0

-15 -20 -25

0 0 0

-12 -15 -18

0 0 0

-9 -10 -13

15 20 25

15 20 25

5 5 5

3 3 3

11 15 19

11 15 19

5 5 5

5 5 7

180

250

0

-30

0

-30

0

-22

0

-15

30

30

6

4

23

23

5

8

Note: Please consult NTN Engineering for Class A bearings.

Table 6.6 (2) Outer rings Mean outside diameter deviation

Nominal outside diameter

∆Dmp

Outside diameter variation

Mean outside diameter variation

outer ring axial runout

VDp

VDmp

Sea

D mm

Class

Class

Class

Class

K

N

C

B

Class Class Class Class K

N

C

Class Class Class Class

B

K

N

C

max

Class

B

B

over

incl.

high

low

high

low

high

low

high

low

18 30 50

30 50 80

0 0 0

-12 -14 -16

0 0 0

-12 -14 -16

0 0 0

-8 -9 -11

0 0 0

-6 -7 -9

12 14 16

12 14 16

4 4 4

3 3 3

9 11 12

9 11 12

5 5 6

4 5 5

3 3 4

80 120 150

120 150 180

0 0 0

-18 -20 -25

0 0 0

-18 -20 -25

0 0 0

-13 -15 -18

0 0 0

-10 -11 -13

18 20 25

18 20 25

5 5 5

3 3 3

14 15 19

14 15 19

7 8 9

5 6 7

4 4 5

180 250 315

250 315 400

0 0 0

-30 -35 -40

0 0 0

-30 -35 -40

0 0 0

-20 -25 -28

0 0 0

-15 -18 -20

30 35 40

30 35 40

6 8 10

4 5 5

23 26 30

23 26 30

10 13 14

8 9 10

6 6 6

max

max

Note: Please consult NTN Engineering for Class A bearings.

Table 6.6 (3) Effective width of inner and outer rings Nominal bore diameter   d

Tapered roller bearing outer ring effective width deviation      ∆T2s

Effective width deviation of roller and inner ring assembly of tapered roller bearing            ∆T1s  Class

mm

Unitμm

  

Class

Class

Class

Class

Class

Class

Class

N

C

B

K

N

C

B

K over

incl.

high

low

high

low

high

low high

10 80 120

80 120 180

+100 +100 +150

0 -100 -150

+50 +50 +50

0 0 0

+100 +100 +100

-100 -100 -100

180

250

+150

-150

+50

0

+100

-150

low

high

low

high

low

high

low high

* * *

* * *

+100 +100 +200

0 -100 -100

+50 +50 +100

0 0 0

+100 +100 +100

-100 -100 -150

* * *

* * *

*

*

+200

-100

+100

0

+100

-150

*

*

Note 1: "*" mark are to be manufactured only for combined bearings. 2: Please consult NTN Engineering for Class A bearings.

A-42

low


●Bearing Tolerances

Unitμm

Overall width deviation of assembled tapered roller bearing

Inner ring axial runout

∆Ts

Sia Class

Class

Class

Class

Class

B

K

N

C

B

max

sup

inf

sup

3 4 4

+200 +200 +200

inf

0 +100 0 +100 0 +100

sup

0 0 0

+200 +200 +200

-200 +200 -200 +200 -200 +200

inf

sup

-200 -200 -200

inf

4 5 7

+200 +200 +350

0 +100 -200 +100 -250 +150

0 0 0

+200 +200 +350

-200 +200 -200 +200 -250 +200

-200 -200 -250

8

+350

-250 +150

0

+350

-300 +200

-300

Table 6.6 (4) Radial runout of inner and outer rings Unitμm

Nominal outside diameter

Inner ring radial runout Kia and Outer ring radial runout Kea

D mm

Class

Class

Class

Class

K

N

C

B

max

over

incl.

18 30 50

30 50 80

18 20 25

18 20 25

5 6 6

3 3 4

80 120 150

120 150 180

35 40 45

35 40 45

6 7 8

4 4 4

180 250 315

250 315 400

50 60 70

50 60 70

10 11 13

5 5 5

Note: Please consult NTN Engineering for Class A bearings.

T1

Master cup sub-unit

φd

T2

Master cone sub-unit

φd

A-43


●Bearing Tolerances

Table 6.7 Tolerance of thrust ball bearings Table 6.7 (1) Shaft raceway washer Nominal bore diameter

Unitμm

Mean bore diameter deviation

Raceway thickness variation

Bore diameter variation

∆dmp

Si

Vdp

  d mm

Class

Class

Class

Class

Class

Class

Class

Class

0,6,5

4

0,6,5

4

0

6

5

4

over

incl.

high

low

high

low

― 18 30

18 30 50

0 0 0

-8 -10 -12

0 0 0

-7 -8 -10

6 8 9

max 5 6 8

10 10 10

5 5 6

max 3 3 3

2 2 2

50 80 120

80 120 180

0 0 0

-15 -20 -25

0 0 0

-12 -15 -18

11 15 19

9 11 14

10 15 15

7 8 9

4 4 5

3 3 4

180 250 315

250 315 400

0 0 0

-30 -35 -40

0 0 0

-22 -25 -30

23 26 30

17 19 23

20 25 30

10 13 15

5 7 7

4 5 5

400 500

500 630

0 0

-45 -50

0 0

-35 -40

34 38

26 30

30 35

18 21

9 11

6 7

Table 6.7 (2) Housing raceway washer Nominal outside diameter

Unitμm

Mean outside diameter deviation

Raceway thickness variation

Outside diameter variation

∆Dmp

Se

VDp

  D Class

mm

Class

0,6,5

Class

4

0,6,5

Class

Class

Class

4

0

6

over

incl.

high

low

high

low

10 18 30

18 30 50

0 0 0

-11 -13 -16

0 0 0

-7 -8 -9

8 10 12

5 6 7

50 80 120

80 120 180

0 0 0

-19 -22 -25

0 0 0

-11 -13 -15

14 17 19

8 10 11

180 250 315

250 315 400

0 0 0

-30 -35 -40

0 0 0

-20 -25 -28

23 26 30

15 19 21

400 500 630

500 630 800

0 0 0

-45 -50 -75

0 0 0

-33 -38 -45

34 38 55

25 29 34

Table 6.7 (3) Bearing height Nominal bore diameter

max

Unitμm

Single direction Bearing height 1 deviation

  d ∆Ts

mm over

incl.

high

low

― 30 50

30 50 80

0 0 0

-75 -100 -125

80 120 180

120 180 250

0 0 0

-150 -175 -200

250 315 400 500

315 400 500 630

0 0 0 0

-225 -300 -350 -400

1 This standard is applied for flat back face bearing of class 0.

A-44

Class

Class

5

4

max

According to the tolerance of S1 against "d" of the same bearings


●Bearing Tolerances

Table 6.8 Tolerance of spherical thrust roller bearing Table 6.8 (1) Shaft raceway washer Nominal bore diameter d mm over incl.

Mean bore Bore Side diameter deviation diameter runout variation with bore ∆dmp Vdp Sd

Unitμm

Bearing height deviation ∆Ts

high

low

max

max

high

low

50 80 120

80 120 180

0 0 0

-15 -20 -25

11 15 19

25 25 30

+150 +200 +250

-150 -200 -250

180 250 315

250 315 400

0 0 0

-30 -35 -40

23 26 30

30 35 40

+300 +350 +400

-300 -350 -400

400

500

0

-45

34

45

+450

-450

Table 6.8 (2) Housing raceway washer Unitμm

Nominal outside diameter D

Single plane mean outside diameter deviation

mm

∆Dmp

over

incl.

high

low

120 180 250

180 250 315

0 0 0

-25 -30 -35

315 400 500

400 500 630

0 0 0

-40 -45 -50

630 800

800 1,000

0 0

-75 -100

A-45


●Bearing Tolerances

6.2 Chamfer measurements and tolerance or allowable values of tapered bore

1

1

1

Bore diameter face rs min or r1s min of bearing or outer rs max or r1s max diameter face of bearing (Axial direction)

Table 6.9 Allowable critical-value of bearing chamfer Table 6.9 (1) Radial bearing (Except tapered roller bearing)

rs min or r s min

rs min or r s min

(Radial direction)

rs max or r s max

Side face of inner ring or center washer, or side face of outer ring

Table 6.9 (2) Tapered roller bearings of metric series Unit mm

Unit mm 1

rs min or

r1s min

Nominal bore diameter d over incl.

rs max or r1s max

rs min

Radial direction

Axial direction 0.2

0.1

0.08

0.16

0.3

0.1

0.2

0.4

0.15

0.3

0.6

0.2

0.5

0.8

40

0.6

1

40

0.8

1

40

1

2

40

1.3

2

50

1.5

3

50

1.9

3

120

2

3.5

0.05

0.3

0.6

1

1.1

1.5

2

2.1

2.5

120

2.5

4

120

2.3

4

120

3

5

80

3

4.5

or r1s min 0.3

0.6

1

1.5

2

2.5

3

Nominal bore diameter of bearing "d" or nominal outside diameter "D"

rs max or r1s max

over

incl.

Radial direction

Axial direction

40

0.7

1.4

40

0.9

1.6

40

1.1

1.7

40

1.3

2

50

1.6

2.5

50

1.9

3

120

2.3

3

120

250

2.8

3.5

250

3.5

4

120

2.8

4

120

250

3.5

4.5

250

4

5

120

3.5

5

120

250

4

5.5

250

4.5

6

120

4

5.5

80

220

3.5

5

120

250

4.5

6.5

220

3.8

6

250

400

5

7

400

5.5

7.5

120

5

7

120

250

5.5

7.5

250

400

6

8

400

6.5

8.5

280

4

6.5

280

4.5

7

100

3.8

6

100

280

4.5

6

280

5

7

280

5

8

280

5.5

8

4

6.5

5

8

10

6

10

13

7.5

12.5

17

9.5

3

2

3

4

5

9

15

19

12

18

24

15

21

30

19

25

38

6

180

6.5

8

180

7.5

9

180

7.5

10

180

9

11

2 These are the allowable minimum dimensions of the chamfer dimension "r" or "r1" and are described in the dimensional table. 3 Inner rings shall be in accordance with the division of "d" and outer rings with that of "D". Note: This standard will be applied to the bearings whose dimensional series (refer to the dimensional table) are specified in the standard of ISO 355 or JIS B 1512. For further information concerning bearings outside of these standards or tapered roller bearings using US customary unit, please contact NTN Engineering.

1 These are the allowable minimum dimensions of the chamfer dimension "r" or "r1" and are described in the dimensional table.

A-46


φd1

φd

α

φ (d+∆dmp) 

α

B

B

Tapered bore having dimensional difference of the average bore diameter within the flat surface

Theoretical tapered bore

Table 6.10 (1) Tolerance of and tolerance values for tapered bore of radial bearings Standard taper ratio 1:12 tapared hole (class 0) Unitμm

Table 6.9 (3) Thrust bearings Unit mm

rs min or r1 min

4

φ (d1+∆d1mp) 

∆d1mp−∆dmp 2

●Bearing Tolerances

d mm

rs max or r1s max Radial and axial direcition

∆dmp

∆d1mp - ∆dmp

Vdp 1

over

incl.

high

low

high

low

max

10 18

10 18 30

+ 22 + 27 + 33

0 0 0

+ 15 + 18 + 21

0 0 0

9 11 13

30 50 80

50 80 120

+ 39 + 46 + 54

0 0 0

+ 25 + 30 + 35

0 0 0

16 19 22

120 180 250

180 250 315

+ 63 + 72 + 81

0 0 0

+ 40 + 46 + 52

0 0 0

40 46 52

315 400 500

400 500 630

+ 89 + 97 +110

0 0 0

+ 57 + 63 + 70

0 0 0

57 63 70

630 800 1,000 1,250

800 1,000 1,250 1,600

+125 +140 +165 +195

0 0 0 0

+ 80 + 90 +105 +125

0 0 0 0

― ― ― ―

0.05

0.1

0.08

0.16

0.1

0.2

0.15

0.3

0.2

0.5

0.3

0.8

0.6

1.5

1

2.2

1.1

2.7

1.5

3.5

2

4

2.1

4.5

3

5.5

4

6.5

over

incl.

low

high

low

max

5

8

6

10

50 80 120

80 120 180

+15 +20 +25

0 0 0

+30 +35 +40

0 0 0

19 22 40

7.5

12.5

9.5

15

180 250 315

250 315 400

+30 +35 +40

0 0 0

+46 +52 +57

0 0 0

46 52 57

12

18

15

21

19

25

2

Table 6.10 (2) Tolerance of and tolerance values for tapered bore of radial bearings Standard taper ratio 1:30 tapered bore (class 0) Units μm ∆dmp

d mm

high

∆d1mp - ∆dmp

Vdp 1

400 500 +45 0 +63 0 63 500 630 +50 0 +70 0 70 1 Applies to all radial flat planes of inner ring tapered bore. 2 Does not apply to diameter series 7 and 8. Note: Quantifiers

1 For a standard taper ratio of 1:12 d1=d+  B 12

4 These are the allowable minimum dimensions of the chamfer dimension "r" or "r1" and are described in the dimensional table.

1 For a standard taper ratio of 1:30 d1=d+  B 30 ∆dmp :Dimensional difference of the average bore diameter within the flat surface at the theoretical small end of the tapered bore. ∆d1mp :Dimensional difference of the average bore diameter within the flat surface at the theoretical large end of the tapered bore. Vdp :Unevenness of the bore diameter with the flat surface B :Nominal width of inner ring α :Half of the tapered bore’s nominal taper angle         For a standard taper ratio of 1:12 α=2° 23′ 9.4″         For a standard taper ratio of 1:30 α=0° 57′ 7.4″

A-47

2


â—?Bearing Tolerances

6.3 Bearing tolerance measurement methods

Table 6.11 shows some of the major methods of measuring rotation tolerances.

For reference, measurement methods for rolling bearing tolerances are in JIS B 1515.

Table 6.11 Rotation tolerance measurement methods

Characteristic tolerance

Measurement method Measuring load

Measuring load

Inner ring radial runout (Kia)

Measuring load

Measuring load

Outer ring radial runout (Kea)

Measuring load

Measuring load

Inner ring axial runout (Sia)

Radial runout of the inner ring is the difference between the maximum and minimum reading of the measuring device when the inner ring is turned one revolution.

Radial runout of the outer ring is the difference between the maximum and minimum reading of the measuring device when the outer ring is turned one revolution.

Axial runout of the inner ring is the difference between the maximum and minimum reading of the measuring device when the inner ring is turned one revolution.

Outer ring axial runout (Sea)

Axial runout of the outer ring is the difference between the maximum and minimum reading of the measuring device when the outer ring is turned one revolution.

Inner ring side runout with bore (Sd)

Inner ring side runout with bore is the difference between the maximum and minimum reading of the measuring device when the inner ring is turned one revolution together with the tapered mandrel.

Measuring load

Measuring load

1.2rs max

Outer ring outside surface inclination (SD)

1.2rs max Reinforcing plate

A-48

Outer ring outside surface inclination is the difference between the maximum and minimum reading of the measuring device when the outside ring is turned one revolution along the reinforcing plate.


●Bearing Fits 7. Bearing Fits ¡Increased noise and deteriorated rotational accuracy due to raceway groove deformation

7.1 Fitting For rolling bearings, inner and outer rings are fixed on the shaft or in the housing so that relative movement does not occur between fitting surfaces during operation or under load. This relative movement between the fitting surfaces of the bearing and the shaft or housing can occur in a radial direction, an axial direction, or in the direction of rotation. Types of fitting include tight, transition and loose fitting, which may be selected depending on whether or not there is interference. The most effective way to fix the fitting surfaces between a bearing's raceway and shaft or housing is to apply a "tight fit." The advantage of this tight fit for thin walled bearings is that it provides uniform load support over the entire ring circumference without any loss of load carrying capacity. However, with a tight fit, ease of installation and disassembly is lost; and when using a non-separable bearing as the floating-side bearing, axial displacement is not possible. For this reason, a tight fit cannot be recommended in all cases.

Please refer to insert pages A-96 ∼ A-99 for information concerning diagnosis of these conditions.

7.3 Fit selection Selection of a proper fit is dependent upon thorough analysis of bearing operating conditions, including consideration of: ¡Shaft and housing material, wall thickness, finished surface accuracy, etc. ¡Machinery operating conditions (nature and magnitude of load, rotational speed, temperature, etc.) 7.3.1 "Tight fit" or "Loose fit" (1) For raceways under rotating loads, a tight fit is necessary. (Refer to Table 7.1) "Raceways under rotating loads" refers to raceways receiving loads rotating relative to their radial direction. For raceways under static loads, on the other hand, a loose fit is sufficient. (Example) Rotating inner ring load = the direction of the radial load on the inner ring is rotating relatively (2) For non-separable bearings, such as deep groove ball bearings, it is generally recommended that either the inner ring or outer ring be given a loose fit.

7.2 The necessity of a proper fit In some cases, improper fit may lead to damage and shorten bearing life, therefore it is necessary to make a careful investigation in selecting a proper fit. Some of the bearing failure caused by improper fit are listed below. ¡Raceway cracking, early flaking and displacement of raceway ¡Raceway and shaft or housing abrasion caused by creeping and fretting corrosion ¡Seizing caused by negative internal clearances

Table 7.1 Radial load and bearing fit

Illustration Static load

Ring load

Fit

Rotating inner ring load

Inner ring : Tight fit

Static outer ring load

Outer ring : Loose fit

Outer ring: Rotating

Static inner ring load

Inner ring : Loose fit

Inner ring: Rotating

Rotating outer ring load

Outer ring : Tight fit

Bearing rotation Inner ring: Rotating Outer ring: Stationary

Unbalanced load

Inner ring: Stationary Outer ring: Rotating

Static load

Unbalanced load

Inner ring: Stationary

Outer ring: Stationary

A-49


●Bearing Fits

shown in formula (7.3).

7.3.2 Recommended Fits Bearing fit is governed by the selection tolerances for bearing shaft diameters and housing bore diameters. Widely used fits for 0 Class tolerance bearings and various shaft and housing bore diameter tolerances are shown in Fig. 7.1. Generally-used, standard fits for most types of bearings and operating conditions are shown in Tables 7.2 - 7.7.

∆ dT = 0.0015・d・∆T ……………………………………(7.3) ∆ dT : Required effective interference for temperature difference μm ∆T : Difference between bearing temperature

and ambient temperature ˚C d : Bearing bore diameter mm

(3) Fitting surface variation and required interference Interference decreases because the fitting surface is smoothened by fitting (surface roughness is reduced). The amount the interference decreases depends on roughness of the fitting surface. It is generally necessary to anticipate the following decrease in interference. For ground shafts: 1.0∼2.5μm For lathed shafts: 5.0∼7.0μm

Table 7.2: Fits for radial bearings Table 7.3: Fits for thrust bearings Table 7.4: Fits for electric motor bearings Table 7.6: Fits for inch series tapered roller bearings (ANSI Class 4) Table 7.7: Fits for inch series tapered roller bearings (ANSI Class 3 and 0) Table 7.5. shows fits and their numerical values. For special fits or applications, please consult NTN Engineering.

(4) Maximum interference When bearing rings are installed with an interference fit, tension or compression stress may occur along their raceways. If interference is too great, this may cause damage to the rings and reduce bearing life. You should try to obtain the previously described upper limit.

7.3.3 Interference minimum and maximum values The following points should be considered when it is necessary to calculate the interference for an application: ¡In calculating the minimum required amount of interference keep in mind that: 1) interference is reduced by radial loads 2) interference is reduced by differences between bearing temperature and ambient temperature 3) interference is reduced by variation of fitting surfaces ¡The upper limit value should not exceed 1/1000 of the shaft diameter. Required interference calculations are shown below.

7.3.4 Other details (1) Tight interference fits are recommended for, ¡Operating conditions with large vibration or shock loads ¡Applications using hollow shafts or housings with thin walls ¡Applications using housings made of light alloys or plastic (2) Small interference fits are preferable for, ¡Applications requiring high running accuracy ¡Applications using small sized bearings or thin walled bearings (3) Consideration must also be given to the fact that fit selection will effect internal bearing clearance selection. (refer to page insert A-58)

(1) Radial loads and required interference Interference of the inner ring and shaft decreases when a radial load is applied to the bearing. The interference required to secure effective interference is expressed by formulae (7.1) and (7.2). Fr ≦ 0.3 Cor 1/2 ∆ dF = 0.08 (d・Fr / B) 1/2 = 0.25 (d・Fr / B) Fr > 0.3 Cor ∆ dF = 0.02 (Fr / B) = 0.2 (Fr / B)

N {kgf }

}………(7.1)

N {kgf }

Housing JIS class 0 bearing

………(7.2)

G6

G7

H8 H7 H6

J6 J7 K6 K7

∆ Dmp

M6 M7

Where,

N6 N7

∆ dF : Required effective interference according to radial load μm d : Bearing bore diameter mm B : Inner ring width mm Fr : Radial load N{kgf} Cor : Basic static load rating N{kgf}

P6 P7

Loose fit

Transition fit Tight fit

Types of fits Tight fit

Transition fit

p6

(2) Temperature difference and required interference Interference between inner rings and steel shafts is reduced as a result of temperature increases (difference between bearing temperature and ambient temperature, ∆T) caused by bearing rotation. Calculation of the minimum required amount of interference in such cases is

JIS class 0 bearing

k5 h5 h6

∆dmp

J5

k6

J6

g5 g6

Shafts Fig 7.1 State of fitting

A-50

m5 m6

n5 n6


●Bearing Fits

(4) A particular type of fit is recommended for SL type cylindrical roller bearings.

Table 7.2 General standards for radial bearing fits (JIS Class 0, 6X, 6) Table 7.2 (1) Tolerance class of shafts commonly used for radial bearings (classes 0, 6X and 6) Ball bearings Conditions

Shaft diameter (mm)

1

Inner ring rotational load or load of undetermined direction

Light load or fluctuating load

Ordinary load

Cylindrical roller bearing Spherical roller bearing Tapered roller bearing

1

Heavy load 1 or impact load

Shaft tolerance class

Remarks

Over

Under

― 18 100 ―

18 100 200 ―

― ― 40 140

― 40 140 200

― ― ― ―

― ― ― ―

h5 js6 k6 m6

When greater accuracy is required js5, k5, and m5 may be substituted for js6, k6, and m6.

― 18 100 140 200 ― ―

18 100 140 200 280 ― ―

― ― 40 100 140 200 ―

― 40 100 140 200 400 ―

― ― 40 65 100 140 280

― 40 65 100 140 280 500

 js5 k5 m5 m6 n6 p6 r6

Alteration of inner clearances to accommodate fit is not a consideration with single-row angular contact bearings and tapered roller bearings. Therefore, k5 and m5 may be substituted for k6 and m6.

― ― ―

― ― ―

50 140 200

140 200 ―

50 100 140

100 140 200

n6 p6 r6

Use bearings with larger internal clearances than CN clearance bearings.

Over Under Over Under Cylindrical bore bearing (Classes 0, 6X and 6)

Inner ring static load

Inner ring must move easily over shaft

Overall shaft diameter

g6

When greater accuracy is required use g5. For large bearings, f6 will suffice for to facilitate movement.

Inner does not have to move easily over shaft

Overall shaft diameter

h6

When greater accuracy is required use h5.

Overall shaft diameter

js6

Generally, shaft and inner rings are not fixed using interferance.

Center axial load

Tapered bore bearing (class 0) (with adapter or withdrawal sleeve) 2

Overall load

Overall shaft diameter

h9/IT5

2

h10/IT7 will suffice for power transmitting shafts.

Table 7.2 (2) Fit with shaft (fits for tapered bore bearings (Class 0) with adapter assembly/withdrawal sleeve) All loads

All bearing types

All shaft diameters

Tolerance class

h9 / IT5 2 h10 / IT7

2

1 Standards for light loads, normal loads, and heavy loads Light loads: equivalent radial load ≦ 0.06 Cr Normal loads: 0.06 Cr <equivalent radial load ≦ 0.12 Cr Heavy loads: 0.12 Cr <equivalent radial load 2 IT5 and IT7 show shaft roundness tolerances, cylindricity tolerances, and related values. Note: All values and fits listed in the above tables are for solid steel shafts.

A-51

General applications Transmission shafts, etc.


●Bearing Fits

Table 7.2 (3) Tolerance class of housing bore commonly used for radial bearings (classes 0, 6X and 6) Conditions Housing

Types of load

Single housing or divided housing Outer ring static load

Single housing

Outer ring rotational load

Toleration class of housing bore

Remarks G7 will suffice for large bearings or bearings with large temperature differential between the outer ring and housing.

All types of loads

Able to move.

H7

Light load 1 or ordinary load 1

Able to move.

H8

Shaft and inner ring become hot.

Able to move easily.

G7

F7 will suffice for large bearings or bearings with large temperature differential between the outer ring and housing.

As a rule, cannot move.

K6

Primarily applies to roller bearings.

Able to move.

JS6

Primarily applies to ball bearings.

Requires quiet operation.

Able to move.

H6

Light or ordinary load

Able to move.

JS7

Ordinary load or heavy load 1

As a rule, cannot move.

K7

Large impact load

Cannot move.

M7

Light or fluctuating load

Cannot move.

M7

Ordinary or heavy load

Cannot move.

N7

Primarily applies to ball bearings.

Heavy load or large impact load with thin housing

Cannot move.

P7

Primarily applies to roller bearings.

Requires precision rotation with light or ordinary loads.

Indeterminate load

Outer ring axial 2 direction movement

If precision is required, JS6 and K6 are used in place of JS7 and K7.

1 Standards for light loads, normal loads, and heavy loads Light loads:       equivalent radial load ≦ 0.06 Cr Normal loads: 0.06 Cr <equivalent radial load ≦ 0.12 Cr Heavy loads: 0.12 Cr < equivalent radial load 2 Indicates whether or not outer ring axial displacement is possible with non-separable type bearings. Note 1: All values and fits listed in the above tables are for cast iron or steel housings. 2: If only center axial load is applied to the bearing, select a tolerance class that provides clearance for the outer ring in the axial direction.

A-52


●Bearing Fits

Table 7.3 Standard fits for thrust bearings (JIS Class 0 and 6) Table 7.3 (1) Shaft fits Load conditions

Fit

Shaft diameter mm over   incl.

Tolerance class

All thrust bearings

Centered axial load only

Transition fit

All sizes

js6 or h6

Inner ring static load

Transition fit

All sizes

js6

Inner ring rotating load or Indeterminate load

Transition fit

  ∼ 200 200 ∼ 400 400 ∼  

k6 or js6 m6 or k6 n6 or m6

Spherical roller thrust bearings

Combined load

Bearing type

Tight fit

Table 7.3 (2) Housing fits Bearing type

Load conditions

All thrust bearings

Centered axial load only Outer ring static load Indeterminate load or outer ring rotating load

Remarks

Select a tolerance class that will provide clearance between outer ring and housing. Loose fit

Combined load

Spherical roller thrust bearings

Tolerance class

Fit

H8

Greater accuracy required with thrust ball bearings

H7 Transition fit

K7

Normal operating conditions

M7

For relatively large radial loads

Note: All values and fits listed in the above tables are for cast iron or steel housings.

Table 7.4 Fits for electric motor bearings Bearing type

Shaft fits Shaft diameter mm Tolerance class over incl.

Housing fits Housing bore Tolerance class diameter

Deep groove ball bearings

∼ 18 18 ∼ 100 100 ∼ 160

j5 k5 m5

All sizes

H6 or J6

Cylindrical roller bearings

∼ 40 40 ∼ 160 160 ∼ 200

k5 m5 n6

All sizes

H6 or J6

A-53


●Bearing Fits

Table 7.5 Numeric value table of fitting for radial bearing of 0 class Table 7.5 (1) Fitting against shaft Nominal bore diameter of bearing

Mean bore 1 diameter deviation

g5 bearing

g6 shaft

bearing

h5 shaft

bearing

h6 shaft

bearing

j5 shaft

bearing

js5 shaft

bearing

j6 shaft

bearing

shaft

∆dmp

d mm over

incl.

high

low

3

6

0

-8

4T∼ 9L

4T∼ 12L

8T∼ 5L

8T∼ 8L

11T∼ 2L

10.5T ∼ 2.5L

14T∼ 2L

6

10

0

-8

3T∼ 11L

3T∼ 14L

8T∼ 6L

8T∼ 9L

12T∼ 2L

11T ∼ 3L

15T∼ 2L

10

18

0

-8

2T∼ 14L

2T∼ 17L

8T∼ 8L

8T∼ 11L

13T∼ 3L

12T ∼ 4L

16T∼ 3L

18

30

0

-10

3T∼ 16L

3T∼ 20L

10T∼ 9L

10T∼ 13L

15T∼ 4L

14.5T ∼ 4.5L

19T∼ 4L

30

50

0

-12

3T∼ 20L

3T∼ 25L

12T∼ 11L

12T∼ 16L

18T∼ 5L

17.5T ∼ 5.5L

23T∼ 5L

50

80

0

-15

5T∼ 23L

5T∼ 29L

15T∼ 13L

15T∼ 19L

21T∼ 7L

21.5T ∼ 6.5L

27T∼ 7L

80

120

0

-20

8T∼ 27L

8T∼ 34L

20T∼ 15L

20T∼ 22L

26T∼ 9L

27.5T ∼ 7.5L

33T∼ 9L

120 140 160

140 160 180

0

-25

11T∼ 32L

11T∼ 39L

25T∼ 18L

25T∼ 25L

32T∼ 11L

34T ∼ 9L

39T∼ 11L

180 200 225

200 225 250

0

-30

15T∼ 35L

15T∼ 44L

30T∼ 20L

30T∼ 29L

37T∼ 13L

40T ∼10L

46T∼ 13L

250 280

280 315

0

-35

18T∼ 40L

18T∼ 49L

35T∼ 23L

35T∼ 32L

42T∼ 16L

46.5T∼11.5L

51T∼ 16L

315 355

355 400

0

-40

22T∼ 43L

22T∼ 54L

40T∼ 25L

40T∼ 36L

47T∼ 18L

52.5T∼12.5L

58T∼ 18L

400 450

450 500

0

-45

25T∼ 47L

25T∼ 60L

45T∼ 27L

45T∼ 40L

52T∼ 20L

58.5T∼13.5L

65T∼ 20L

J7

Js7

K6

1 Above table is not applicable to tapered roller bearings whose bore diameter d is 30mm or less.

Table 7.5 (2) Fitting against housing Nominal outside diameter of bearing

Mean outside2 diameter deviation

D

∆Dmp

G7 housing

bearing

H6 housing

bearing

H7 housing

bearing

J6 housing

bearing

housing

bearing

housing

bearing

housing

bearing

mm over

incl.

high

low

6

10

0

-8

5L∼ 28L

0∼ 17L

0∼ 23L

4T∼ 13L

7T∼ 16L

7.5T∼15.5L

7T∼ 10L

10

18

0

-8

6L∼ 32L

0∼ 19L

0∼ 26L

5T∼ 14L

8T∼ 18L

9T ∼17L

9T∼ 10L

18

30

0

-9

7L∼ 37L

0∼ 22L

0∼ 30L

5T∼ 17L

9T∼ 21L

10.5T∼19.5L

11T∼ 11L

30

50

0

-11

9L∼ 45L

0∼ 27L

0∼ 36L

6T∼ 21L

11T∼ 25L

12.5T∼23.5L

13T∼ 14L

50

80

0

-13

10L∼ 53L

0∼ 32L

0∼ 43L

6T∼ 26L

12T∼ 31L

15T ∼28L

15T∼ 17L

80

120

0

-15

12L∼ 62L

0∼ 37L

0∼ 50L

6T∼ 31L

13T∼ 37L

17.5T∼32.5L

18T∼ 19L

120

150

0

-18

14L∼ 72L

0∼ 43L

0∼ 58L

7T∼ 36L

14T∼ 44L

20T ∼38L

21T∼ 22L

150

180

0

-25

14L∼ 79L

0∼ 50L

0∼ 65L

7T∼ 43L

14T∼ 51L

20T ∼45L

21T∼ 29L

180

250

0

-30

15L∼ 91L

0∼ 59L

0∼ 76L

7T∼ 52L

16T∼ 60L

23T ∼53L

24T∼ 35L

250

315

0

-35

17L∼104L

0∼ 67L

0∼ 87L

7T∼ 60L

16T∼ 71L

26T ∼61L

27T∼ 40L

315

400

0

-40

18L∼115L

0∼ 76L

0∼ 97L

7T∼ 69L

18T∼ 79L

28.5T∼68.5L

29T∼ 47L

400

500

0

-45

20L∼128L

0∼ 85L

0∼108L

7T∼ 78L

20T∼ 88L

31.5T∼76.5L

32T∼ 53L

2 Above table is not applicable to tapered roller bearings whose outside diameter D is 150mm or less. Note: Fitting symbol "L" indicates clearance and "T" indicates interference.

A-54


●Bearing Fits

Unitμm

js6

k5

bearing

shaft

k6

bearing

shaft

m5

bearing

shaft

bearing

m6 shaft

bearing

n6 shaft

bearing

p6 shaft

bearing

r6 shaft

bearing

shaft

Nominal bore diameter of bearing d mm over

incl.

12T ∼ 4L

14T∼ 1T

17T∼ 1T

17T∼ 4T

20T∼ 4T

24T∼ 8T

28T∼ 12T

3

6

12.5T∼ 4.5L

15T∼ 1T

18T∼ 1T

20T∼ 6T

23T∼ 6T

27T∼10T

32T∼ 15T

6

10

13.5T∼ 5.5L

17T∼ 1T

20T∼ 1T

23T∼ 7T

26T∼ 7T

31T∼12T

37T∼ 18T

10

18

16.5T∼ 6.5L

21T∼ 2T

25T∼ 2T

27T∼ 8T

31T∼ 8T

38T∼15T

45T∼ 22T

18

30

20T ∼ 8L

25T∼ 2T

30T∼ 2T

32T∼ 9T

37T∼ 9T

45T∼17T

54T∼ 26T

30

50

24.5T∼ 9.5L

30T∼ 2T

36T∼ 2T

39T∼11T

45T∼11T

54T∼20T

66T∼ 32T

50

80

31T ∼11L

38T∼ 3T

45T∼ 2T

48T∼13T

55T∼13T

65T∼23T

79T∼ 37T

80

120

120 140 160

140 160 180

37.5T∼12.5L

46T∼ 3T

53T∼ 3T

58T∼15T

65T∼15T

77T∼27T

93T∼ 43T

113T∼ 63T 115T∼ 65T 118T∼ 68T

44.5T∼14.5L

54T∼ 4T

63T∼ 4T

67T∼17T

76T∼17T

90T∼31T

109T∼ 50T

136T∼ 77T 139T∼ 80T 143T∼ 84T

180 200 225

200 225 250

51T ∼16L

62T∼ 4T

71T∼ 4T

78T∼20T

87T∼20T

101T∼34T

123T∼ 56T

161T∼ 94T 165T∼ 98T

250 280

280 315

58T ∼18L

69T∼ 4T

80T∼ 4T

86T∼21T

97T∼21T

113T∼37T

138T∼ 62T

184T∼108T 190T∼114T

315 355

355 400

65T ∼20L

77T∼ 5T

90T∼ 4T

95T∼23T

108T∼23T

125T∼40T

153T∼ 68T

211T∼126T 217T∼132T

400 450

450 500

Unitμm

K7 housing

bearing

M7 housing

bearing

N7 housing

bearing

P7 housing

bearing

Nominal outside diameter of bearing D mm over

incl.

10T∼ 13L

15T∼ 8L

19T∼ 4L

24T∼ 1T

6

10

12T∼ 14L

18T∼ 8L

23T∼ 3L

29T∼ 3T

10

18

15T∼ 15L

21T∼ 9L

28T∼ 2L

35T∼ 5T

18

30

18T∼ 18L

25T∼ 11L

33T∼ 3L

42T∼ 6T

30

50

21T∼ 22L

30T∼ 13L

39T∼ 4L

51T∼ 8T

50

80

25T∼ 25L

35T∼ 15L

45T∼ 5L

59T∼ 9T

80

120

28T∼ 30L

40T∼ 18L

52T∼ 6L

68T∼10T

120

150

28T∼ 37L

40T∼ 25L

52T∼ 13L

68T∼ 3T

150

180

33T∼ 43L

46T∼ 30L

60T∼ 16L

79T∼ 3T

180

250

36T∼ 51L

52T∼ 35L

66T∼ 21L

88T∼ 1T

250

315

40T∼ 57L

57T∼ 40L

73T∼ 24L

98T∼ 1T

315

400

45T∼ 63L

63T∼ 45L

80T∼ 28L

400

500

108T∼ 0

A-55


●Bearing Fits

Table 7.6 General fitting standards for tapered roller bearings using US customary unit (ANSI class 4) Table 7.6 (1) Fit with shaft

Unitμm

Nominal bearing bore diameter d mm over incl.

Bore diameter tolerance ∆ds high low

Shaft diameter tolerance high

low

max

Ordinary load

∼ 76.2 76.2 ∼ 304.8 304.8 ∼ 609.6 609.6 ∼ 914.4

+13 +25 +51 +76

0 0 0 0

+ 38 + 64 +127 +190

+ 25 + 38 + 76 +114

38T 64T 127T 190T

Heavy load Impact load

∼ 76.2 76.2 ∼ 304.8 304.8 ∼ 609.6 609.6 ∼ 914.4

+13 +25 +51 +76

0 0 0 0

+ 64 + 38 38T ∼ 12T 0.5 μm mean interference per 1 mm of inner ring bore diameter. Minimum interference is 25 μm. Tolerance for the shaft is adjusted to match tolerance of bearing bore diameter.

Inner ring does not have to move easily over shaft with ordinary load.

∼ 76.2 76.2 ∼ 304.8 304.8 ∼ 609.6 609.6 ∼ 914.4

+13 +25 +51 +76

0 0 0 0

+ + + +

Inner ring must move easily over shaft with ordinary load.

∼ 76.2 76.2 ∼ 304.8 304.8 ∼ 609.6 609.6 ∼ 914.4

+13 +25 +51 +76

0 0 0 0

Operating conditions

Inner ring rotational load Outer ring rotational load

13 25 51 76 0 0 0 0

-

Fitting

1

Remark min ∼ ∼ ∼ ∼

12T 13T 25T 38T

0 0 0 0

13T 25T 51T 76T

∼ ∼ ∼ ∼

13L 25L 51L 76L

13 25 51 76

0 0 0 0

∼ ∼ ∼ ∼

13L 50L 102L 152L

Applicable when slight impact load is applied as well.

Not applicable when impact load is applied.

Table 7.6 (2) Fit with housing

Operating conditions

Unitμm

Nominal bearing outer diameter D mm over incl.

Outer diameter tolerance ∆Ds high low

Housing bore diameter tolerance

Fitting

1

Types of fit

high

low

max

min

Inner ring rotational load Outer ring rotational load

When used on floating- or fixed side

76.2 127.0 304.8 609.6

∼ ∼ ∼ ∼ ∼

76.2 127.0 304.8 609.6 914.4

+25 +25 +25 +51 +76

0 0 0 0 0

+ 76 + 76 + 76 +152 +229

+ 51 + 51 + 51 +102 +152

26L 26L 26L 51L 76L

∼ ∼ ∼ ∼ ∼

76L 76L 76L 152L 229L

loose fit

When outer ring is adjusted in axial direction

76.2 127.0 304.8 609.6

∼ ∼ ∼ ∼ ∼

76.2 127.0 304.8 609.6 914.4

+25 +25 +25 +51 +76

0 0 0 0 0

+ 25 + 25 + 51 + 76 +127

0 0 0 + 26 + 51

25T 25T 25T 25T 25T

∼ ∼ ∼ ∼ ∼

25L 25L 51L 76L 127L

transition fit

When outer ring is not adjusted in axial direction

76.2 127.0 304.8 609.6

∼ ∼ ∼ ∼ ∼

76.2 127.0 304.8 609.6 914.4

+25 +25 +25 +51 +76

0 0 0 0 0

-

13 25 25 25 25

- 38 - 51 - 51 - 76 -102

63T 76T 76T 127T 178T

∼ ∼ ∼ ∼ ∼

13T 25T 25T 25T 25T

76.2 127.0 304.8 609.6

∼ ∼ ∼ ∼ ∼

76.2 127.0 304.8 609.6 914.4

+25 +25 +25 +51 +76

0 0 0 0 0

-

13 25 25 25 25

- 38 - 51 - 51 - 76 -102

63T 76T 76T 127T 178T

∼ ∼ ∼ ∼ ∼

13T 25T 25T 25T 25T

When outer ring is not adjusted in axial direction

1 Fitting symbol "L" indicates clearance and "T" indicates interference.

A-56

tight fit


●Bearing Fits

Table 7.7 General fitting standards for tapered roller bearings using US customary unit (ANSI classes 3 and 0) Table 7. (1) Fit with shaft

Operating conditions

Unitμm

Nominal bearing bore diameter d mm over incl.

Bore diameter tolerance ∆ds high low

Shaft diameter tolerance high

low

Fitting max

1

min

Outer ring Inner ring rotational load rotational load

30T ∼ 5T 64T ∼ 13T 102T ∼ 26T

Precision machine tool spindles

∼ 304.8 304.8 ∼ 609.6 609.6 ∼ 914.4

+13 +25 +38

0 0 0

+ 30 + 64 +102

Heavy load Impact load High-speed rotation

∼ 76.2 76.2 ∼ 304.8 304.8 ∼ 609.6 609.6 ∼ 914.4

+13 +13 +25 +38

0 0 0 0

Minimum interference is 0.25 μm per 1 mm of inner ring bore diameter.

Precision machine tool spindles

∼ 304.8 304.8 ∼ 609.6 609.6 ∼ 914.4

+13 +25 +38

0 0 0

+ 13 + 25 +102

+ 18 + 38 + 64

0 0 0

30T ∼ 5T 64T ∼ 13T 102T ∼ 26T

Note: For class 0, bearing bore diameter d applies to 241.3 mm or less.

Table 7.7 (2) Fit with housing

Operating conditions

Unitμm

Nominal bearing outer diameter D mm over incl.

Outer diameter tolerance ∆Ds high low

Housing bore diameter tolerance high

low

Fitting

1

Type of fit max

min

∼ 152.4 ∼ 304.8 ∼ 609.6 ∼

152.4 304.8 609.6 914.4

+13 +13 +25 +38

0 0 0 0

+ + + +

38 38 64 89

+ + + +

25 25 38 51

12L 12L 13L 13L

∼ ∼ ∼ ∼

38L 38L 64L 89L

When used for fixed side

∼ 152.4 ∼ 304.8 ∼ 609.6 ∼

152.4 304.8 609.6 914.4

+13 +13 +25 +38

0 0 0 0

+ + + +

25 25 51 76

+ + + +

13 13 25 38

0 0 0 0

∼ ∼ ∼ ∼

25L 25L 51L 76L

When outer ring is adjusted in axial direction

∼ 152.4 152.4 ∼ 304.8 304.8 ∼ 609.6 609.6 ∼ 914.4

+13 +13 +13 +38

0 0 0 0

+ + + +

13 13 25 38

0 0 0 0

13T 13T 25T 38T

∼ ∼ ∼ ∼

13L 13L 25L 38L

When outer ring is not adjusted in axial direction

∼ 152.4 152.4 ∼ 304.8 304.8 ∼ 609.6 609.6 ∼ 914.4

+13 +13 +25 +38

0 0 0 0

Ordinary load When outer ring is not adjusted in axial direction

∼ 152.4 ∼ 304.8 ∼ 609.6 ∼

+13 +13 +25 +38

0 0 0 0

When used for floating-side Inner ring rotational load Outer ring rotational load

152.4 304.8 609.6 914.4

-

0 0 0 0

-

13 25 25 38

26T 38T 50T 76T

∼ ∼ ∼ ∼

0 0 0 0

13 13 13 13

-

25 38 38 51

38T 51T 63T 89T

∼ ∼ ∼ ∼

13T 13T 13T 13T

1 Fitting symbol "L" indicates clearance and "T" indicates interference.

Note: For class 0, bearing outer diameter D applies to 304.8 mm or less.

A-57

loose fit

transition fit

tight fit


●Bearing Internal Clearance and Preload 8. Bearing Internal Clearance and Preload 8.1

8.2.1 Criteria for selecting bearing internal clearance A bearing's life is theoretically maximum when operating clearance is slightly negative at steady operation. In reality it is however difficult to constantly maintain this optimal condition. If the negative clearance becomes enlarged by fluctuating operating conditions, heat will be produced and life will decrease dramatically. Under ordinary circumstances you should therefore select an initial internal clearance where the operating clearance is slightly larger than zero. For ordinary operating conditions, use fitting for ordinary loads. If rotational speed and operating temperature are ordinary, selecting normal clearance enables you to obtain the proper operating clearance. Table 8.2 gives examples applying internal clearances other than CN (normal) clearance.

Bearing internal clearance

Bearing internal clearance is the amount of internal free movement before mounting. As shown in Fig. 8.1, when either the inner ring or the outer ring is fixed and the other ring is free to move, displacement can take place in either an axial or radial direction. This amount of displacement (radially or axially) is termed the internal clearance and, depending on the direction, is called the radial internal clearance or the axial internal clearance. When the internal clearance of a bearing is measured, a slight measurement load is applied to the raceway so the internal clearance may be measured accurately. However, at this time, a slight amount of elastic deformation of the bearing occurs under the measurement load, and the clearance measurement value (measured clearance) is slightly larger than the true clearance. This difference between the true bearing clearance and the increased amount due to the elastic deformation must be compensated for. These compensation values are given in Table 8.1. For roller bearings the amount of elastic deformation can be ignored.

8.2.2 Calculation of operating clearance Operating clearance of a bearing can be calculated from initial bearing internal clearance and decrease in internal clearance due to interference and decrease in internal clearance due to difference in temperature of the inner and outer rings. δeff =δo −(δf +δt )…………………(8.1) where, δeff : Effective internal clearance, mm δo : Bearing internal clearance, mm δf : Reduced amount of clearance due to

The internal clearance values for each bearing class are shown in Tables 8.3 through 8.11.

8.2

Internal clearance selection

The internal clearance of a bearing under operating conditions (effective clearance) is usually smaller than the same bearing's initial clearance before being installed and operated. This is due to several factors including bearing fit, the difference in temperature between the inner and outer rings, etc. As a bearing's operating clearance has an effect on bearing life, heat generation, vibration, noise, etc.; care must be taken in selecting the most suitable operating clearance.

Table 8.1 Adjustment of radial internal clearance based on measured load (deep groove ball bearing) Unitμm Nominal Bore Diameter Measuring Load d mm N{kgf} over incl. 10 1 18 50

18 50 200

24.5 49 147

{2.5} {5} {15}

Internal clearance adjustment C2

CN

C3

C4

C5

3∼4 4∼5 6∼8

4 5 8

4 6 9

4 6 9

4 6 9

1 This diameter is included in the group.

Table 8.2 Examples of applications where bearing clearances other than CN (normal) clearance are used

δ2

Operating conditions

δ

Applications Railway vehicle axles

With heavy or shock load, clearance is large. Vibration screens

Railway vehicle traction With indeterminate load, motors both inner and outer rings are tight-fitted. Tractors and final speed regulators

δ1

Fig. 8.1 Internal clearance

A-58

C3 C3,C4 C4 C4

Paper making machines and driers

C3,C4

Rolling mill table rollers

C3

Reduction of noise and vibration when rotating.

Micromotors

C2,CM

Adjustment of clearance to minimize shaft runout.

Main spindles of lathes (Double-row cylindrical roller bearings)

C9NA, C0NA

Loose fitting for both inner and outer rings.

Compressor roll neck

C2

Shaft or inner ring is heated.

Radial clearance =δ     Axial clearance =δ1+δ2

Selected clearance


●Bearing Internal Clearance and Preload

interference, mm δt : Reduced amount of clearance due to temperature differential of inner and outer rings, mm

shaft is connected to a heat source, or a heated substance is conducted through the hollow shaft; the temperature difference between the two rings can be even greater. The amount of internal clearance is thus further reduced by the differential expansion of the two rings.

(1) Reduced clearance due to interference When bearings are installed with interference fits on shafts and in housings, the inner ring will expand and the outer ring will contract; thus reducing the bearings' internal clearance. The amount of expansion or contraction varies depending on the shape of the bearing, the shape of the shaft or housing, dimensions of the respective parts, and the type of materials used. The differential can range from approximately 70% to 90% of the effective interference.

δt =α・∆T・Do ………………………… (8.3) where, δt : Amount of reduced clearance due to heat differential, mm α : Bearing material expansion coefficient 12.5 × 10-6/˚C ∆T : Inner/outer ring temperature differential, ℃ Do : Outer ring raceway diameter, mm

δf = (0.70∼0.90) ∆deff …………………… (8.2) where, δf : Reduced amount of clearance due to interference, mm ∆deff : Effective interference, mm

Outer ring raceway diameter, Do, values can be approximated by using formula (8.4) or (8.5). For ball bearings and spherical roller bearings, Do = 0.20 (d + 4.0D) ……………………… (8.4) For roller bearings (except Spherical roller bearing), Do = 0.25 (d + 3.0D) ……………………… (8.5) where, d : Bearing bore diameter, mm D : Bearing outside diameter, mm

(2) Reduced internal clearance due to inner/outer ring temperature difference. During operation, normally the outer ring will range from 5 to 10˚C cooler than the inner ring or rotating parts. However, if the cooling effect of the housing is large, the

Table 8.3 Radial internal clearance of deep groove ball bearings Nominal bore diameter d mm over incl.

C2

Unitμm

CN

C5

C4

C3

min

max

min

max

min

max

min

max

min

max

―  2.5 6

2.5 6 10

0 0 0

6 7 7

4 2 2

11 13 13

10 8 8

20 23 23

―  ―  14

―  ―  29

―  ―  20

―  ―  37

10 18 24

18 24 30

0 0 1

9 10 11

3 5 5

18 20 20

11 13 13

25 28 28

18 20 23

33 36 41

25 28 30

45 48 53

30 40 50

40 50 65

1 1 1

11 11 15

6 6 8

20 23 28

15 18 23

33 36 43

28 30 38

46 51 61

40 45 55

64 73 90

65 80 100

80 100 120

1 1 2

15 18 20

10 12 15

30 36 41

25 30 36

51 58 66

46 53 61

71 84 97

65 75 90

105 120 140

120 140 160

140 160 180

2 2 2

23 23 25

18 18 20

48 53 61

41 46 53

81 91 102

71 81 91

114 130 147

105 120 135

160 180 200

180 200 225

200 225 250

2 2 2

30 35 40

25 25 30

71 85 95

63 75 85

117 140 160

107 125 145

163 195 225

150 175 205

230 265 300

250 280 315

280 315 355

2 2 3

45 55 60

35 40 45

105 115 125

90 100 110

170 190 210

155 175 195

245 270 300

225 245 275

340 370 410

355 400 450

400 450 500

3 3 3

70 80 90

55 60 70

145 170 190

130 150 170

240 270 300

225 250 280

340 380 420

315 350 390

460 510 570

500 560

560 630

10 10

100 110

80 90

210 230

190 210

330 360

310 340

470 520

440 490

630 690

A-59


●Bearing Internal Clearance and Preload

Table 8.4 Radial internal clearance of self-aligning ball bearings Nominal bore diameter

Bearing with cylindrical bore

d mm over

   C2

incl.

min

   C3 min max

CN max

min

max

   C4 min

   C5 min max

max

2.5 6 10

6 10 14

1 2 2

8 9 10

5 6 6

15 17 19

10 12 13

20 25 26

15 19 21

25 33 35

21 27 30

33 42 48

14 18 24

18 24 30

3 4 5

12 14 16

8 10 11

21 23 24

15 17 19

28 30 35

23 25 29

37 39 46

32 34 40

50 52 58

30 40 50

40 50 65

6 6 7

18 19 21

13 14 16

29 31 36

23 25 30

40 44 50

34 37 45

53 57 69

46 50 62

66 71 88

65 80 100

80 100 120

8 9 10

24 27 31

18 22 25

40 48 56

35 42 50

60 70 83

54 64 75

83 96 114

76 89 105

108 124 145

120 140

140 160

10 15

38 44

30 35

68 80

60 70

100 120

90 110

135 161

125 150

175 210

Table 8.5 (1) Radial internal clearance for duplex angular contact ball bearings Unit μm

Table 8.5 (2) Radial internal clearance of double row angular contact ball bearings Unit μm

Nominal bore C1 diameter d mm min max over incl.

Nominal bore C2 diameter d mm min max over incl.

― 10 18

C2

CN

C3

C4

min max

min max

min max

min max

10 18 30

3 3 3

8 8 10

6 6 6

12 12 12

8 8 10

15 15 20

15 15 20

22 24 32

22 30 40

30 40 55

30 50 50 80 80 100

3 3 3

10 11 13

8 11 13

14 17 22

14 17 22

25 32 40

25 32 40

40 50 60

55 75 95

3 3 3 3

15 16 18 20

15 16 18 20

30 33 35 40

30 35 35 40

50 55 60 65

50 75 55 80 60 90 65 100

110 130 150 180

100 120 150 180

120 150 180 200

CN

C3

C4

C5

min max

min max

min max

min max

10 only 10 18 18 24

0 1 1

10 11 11

5 6 6

15 16 16

10 12 13

21 23 24

16 19 21

28 31 33

24 28 31

36 40 43

75 95 120

24 30 40

30 40 50

1 2 2

13 15 15

6 7 9

19 22 24

13 15 17

26 30 32

21 24 28

35 39 45

31 35 40

45 50 57

140 170 200 240

50 65 80

65 80 100

0 1 3

15 17 20

7 11 13

24 31 36

16 21 25

33 42 49

28 34 40

48 56 65

41 50 58

61 74 67

Note: The clearance group in the table is applied only to contact angles in the table below.

Table 8.6 Radial internal clearance of bearings for electric motor Unitμm

Contact angle symbol

C 1 A B

Nominal contact angle

15˚ 30˚ 40˚

Applicable clearance group 2

Nominal bore diameter    d mm over incl.

C1,C2   C2,CN,C3   CN,C3,C4

1 Not indicated for bearing number. 2 For information concerning clearance other than applicable clearance, please contact NTN Engineering.

Radial internal clearance CM Deep groove ball bearings Cylindrical roller bearings min max min max

10 (incl.) 18 24

18 24 30

4 5 5

11 12 12

― ― 15

― ― 30

30 40 50

40 50 65

9 9 12

17 17 22

15 20 25

30 35 40

65 80 100

80 100 120

12 18 18

22 30 30

30 35 35

45 55 60

120 140 160

140 160 180

24 24 ―

38 38 ―

40 50 60

65 80 90

180

200

65

100

Note 1: Suffix CM is added to bearing numbers. Example: 6205ZZCM 2: Clearance not interchangeable for cylindrical roller bearings.

A-60


●Bearing Internal Clearance and Preload

Unitμm

Nominal bore diameter

Bearing with tapered bore    C2 min max

CN min

max

   C3 min max

   C4 min max

   C5 min max

d mm  over

incl.

― ― ―

― ― ―

― ― ―

― ― ―

― ― ―

― ― ―

― ― ―

― ― ―

― ― ―

― ― ―

2.5 6 10

6 10 14

― 7 9

― 17 20

― 13 15

― 26 28

― 20 23

― 33 39

― 28 33

― 42 50

― 37 44

― 55 62

14 18 24

18 24 30

12 14 18

24 27 32

19 22 27

35 39 47

29 33 41

46 52 61

40 45 56

59 65 80

52 58 73

72 79 99

30 40 50

40 50 65

23 29 35

39 47 56

35 42 50

57 68 81

50 62 75

75 90 108

69 84 100

98 116 139

91 109 130

123 144 170

65 80 100

80 100 120

40 45

68 74

60 65

98 110

90 100

130 150

120 140

165 191

155 180

205 240

120 140

140 160

Table 8.7 Interchangeable radial internal clearance for cylindrical roller bearing (cylindrical bore) Nominal bore diameter d mm over incl.

CN

C2

C3

Unitμm

C4

C5

min

max

min

max

min

max

min

max

min

max

―  10 24

10 24 30

0 0 0

25 25 25

20 20 20

45 45 45

35 35 35

60 60 60

50 50 50

75 75 75

30 40 50

40 50 65

5 5 10

30 35 40

25 30 40

50 60 70

45 50 60

70 80 90

60 70 80

85 100 110

80 95 110

105 125 140

65 80 100

80 100 120

10 15 15

45 50 55

40 50 50

75 85 90

65 75 85

100 110 125

90 105 125

125 140 165

130 155 180

165 190 220

120 140 160

140 160 180

15 20 25

60 70 75

60 70 75

105 120 125

100 115 120

145 165 170

145 165 170

190 215 220

200 225 250

245 275 300

180 200 225

200 225 250

35 45 45

90 105 110

90 105 110

145 165 175

140 160 170

195 220 235

195 220 235

250 280 300

275 305 330

330 365 395

250 280 315

280 315 355

55 55 65

125 130 145

125 130 145

195 205 225

190 200 225

260 275 305

260 275 305

330 350 385

370 410 455

440 485 535

355 400 450

400 450 500

100 110 110

190 210 220

190 210 220

280 310 330

280 310 330

370 410 440

370 410 440

460 510 550

510 565 625

600 665 735

A-61

―  65 70

―  90 95


●Bearing Internal Clearance and Preload

Table 8.8 Non-interchangeable radial internal clearance for cylindrical roller bearing Nominal bore diameter    d mm over incl.

Bearing with cylindrical bore    C1NA

   NA1

   C2NA

min

max

min

max

min

max

   C3NA min max

   C4NA min max

   C5NA min max

― 10 18

10 18 24

5 5 5

10 10 10

10 10 10

20 20 20

20 20 20

30 30 30

35 35 35

45 45 45

45 45 45

55 55 55

― 65 65

― 75 75

24 30 40

30 40 50

5 5 5

10 12 15

10 12 15

25 25 30

25 25 30

35 40 45

40 45 50

50 55 65

50 55 65

60 70 80

70 80 95

80 95 110

50 65 80

65 80 100

5 10 10

15 20 25

15 20 25

35 40 45

35 40 45

50 60 70

55 70 80

75 90 105

75 90 105

90 110 125

110 130 155

130 150 180

100 120 140

120 140 160

10 15 15

25 30 35

25 30 35

50 60 65

50 60 65

80 90 100

95 105 115

120 135 150

120 135 150

145 160 180

180 200 225

205 230 260

160 180 200

180 200 225

15 20 20

35 40 45

35 40 45

75 80 90

75 80 90

110 120 135

125 140 155

165 180 200

165 180 200

200 220 240

250 275 305

285 315 350

225 250 280

250 280 315

25 25 30

50 55 60

50 55 60

100 110 120

100 110 120

150 165 180

170 185 205

215 240 265

215 240 265

265 295 325

330 370 410

380 420 470

315 355 400 450

355 400 450 500

30 35 45 50

65 75 85 95

65 75 85 95

135 150 170 190

135 150 170 190

200 225 255 285

225 255 285 315

295 330 370 410

295 330 370 410

360 405 455 505

455 510 565 625

520 585 650 720

1 For bearings with normal clearance, only NA is added to bearing numbers. Ex. NU310NA

Table 8.9 Axial internal clearance for double row and duplex tapered roller bearings (metric series) Nominal bore diameter    d mm over incl.

Contact angleα≦27˚ (e ≦ 0.76)     C2

    C3

CN

    C4

min

max

min

max

min

max

min

max

18 24 30

24 30 40

25 25 25

75 75 95

75 75 95

125 125 165

125 145 165

170 195 235

170 195 210

220 245 280

40 50 65

50 65 80

20 20 20

85 85 110

85 110 130

150 175 220

175 195 240

240 260 325

240 280 325

305 350 410

80 100 120

100 120 140

45 45 45

150 175 175

150 175 175

260 305 305

280 350 390

390 480 520

390 455 500

500 585 630

140 160 180

160 180 200

60 80 100

200 220 260

200 240 260

340 380 420

400 440 500

540 580 660

520 600 660

660 740 820

200 225 250

225 250 280

120 160 180

300 360 400

300 360 400

480 560 620

560 620 700

740 820 920

720 820 920

900 1,020 1,140

280 315 355 400

315 355 400 500

200 220 260 300

440 480 560 600

440 500 560 620

680 760 860 920

780 860 980 1,100

1,020 1,120 1,280 1,400

1,020 1,120 1,280 1,440

1,260 1,380 1,580 1,740

Note1: This table applies to bearings contained in the catalog. For information concerning other bearings or bearings using US customary unit, please contact NTN Engineering. 2: The correlation of axial internal clearance (∆a) and radial internal clearance (∆r) is expressed as ∆r = 0.667 ・ e・∆a. e: Constant (see dimensions table) 3: Bearing series 329X, 330, 322C and 323Cdo not apply to the table.

A-62


●Bearing Internal Clearance and Preload

Unitμm

Nominal bore diameter    d mm over incl.

Bearing with tapered bore 2

   C9NA min

max

2

   C0NA min max

   C1NA min max

   C2NA min max

1

   NA min

max

   C3NA min max

5 5 5

5 10 10

7 7 7

17 17 17

10 10 10

20 20 20

20 20 20

30 30 30

35 35 35

45 45 45

45 45 45

55 55 55

― 10 18

10 18 24

5 5 5

10 12 15

10 10 10

20 20 20

10 12 15

25 25 30

25 25 30

35 40 45

40 45 50

50 55 65

50 55 65

60 70 80

24 30 40

30 40 50

5 10 10

15 20 25

10 15 20

20 30 35

15 20 25

35 40 45

35 40 45

50 60 70

55 70 80

75 90 105

75 90 105

90 110 125

50 65 80

65 80 100

10 15 15

25 30 35

20 25 30

35 40 45

25 30 35

50 60 65

50 60 65

80 90 100

95 105 115

120 135 150

120 135 150

145 160 180

100 120 140

120 140 160

15 20 20

35 40 45

30 30 35

45 50 55

35 40 45

75 80 90

75 80 90

110 120 135

125 140 155

165 180 200

165 180 200

200 220 240

160 180 200

180 200 225

25 25 30

50 55 60

40 40 45

65 65 75

50 55 60

100 110 120

100 110 120

150 165 180

170 185 205

215 240 265

215 240 265

265 295 325

225 250 280

250 280 315

30 35 45 50

65 75 85 95

45 50 60 70

75 90 100 115

65 75 85 95

135 150 170 190

135 150 170 190

200 225 255 285

225 255 285 315

295 330 370 410

295 330 370 410

360 405 455 505

315 355 400 450

355 400 450  500

2 C9NA, C0NA and C1NA are applied only to precision bearings of Class 5 and higher.

Unitμm

Contact angleα> 27˚ (e > 0.76)     C2 min

Nominal bore diameter

    C3

CN

    C4

   d mm over

max

min

max

min

max

min

max

10 10 10

30 30 40

30 30 40

50 50 70

50 60 70

70 80 100

70 80 90

90 100 120

18 24 30

24 30 40

10 10 10

40 40 50

40 50 60

70 80 100

80 90 110

110 120 150

110 130 150

140 160 190

40 50 65

50 65 80

20 20 20

70 70 70

70 70 70

120 120 120

130 150 160

180 200 210

180 210 210

230 260 260

80 100 120

100 120 140

30 ― ―

100 ― ―

100 ― ―

160 ― ―

180 ― ―

240 ― ―

240 ― ―

300 ― ―

140 160 180

160 180 200

― ― ―

― ― ―

― ― ―

― ― ―

― ― ―

― ― ―

― ― ―

― ― ―

200 225 250

225 250 280

― ― ― ―

― ― ― ―

― ― ― ―

― ― ― ―

― ― ― ―

― ― ― ―

― ― ― ―

― ― ― ―

280 315 355 400

315 355 400 500

A-63

incl.


●Bearing Internal Clearance and Preload

Table 8.10 Radial internal clearance of spherical roller bearings Nominal bore diameter   d mm

Bearing with cylindrical bore    C2

over

incl.

14 18 24

   C3 min max

CN

   C4 min max

   C5 min max

min

max

min

max

18 24 30

10 10 15

20 20 25

20 20 25

35 35 40

35 35 40

45 45 55

45 45 55

60 60 75

60 60 75

75 75 95

30 40 50

40 50 65

15 20 20

30 35 40

30 35 40

45 55 65

45 55 65

60 75 90

60 75 90

80 100 120

80 100 120

100 125 150

65 80 100

80 100 120

30 35 40

50 60 75

50 60 75

80 100 120

80 100 120

110 135 160

110 135 160

145 180 210

145 180 210

180 225 260

120 140 160

140 160 180

50 60 65

95 110 120

95 110 120

145 170 180

145 170 180

190 220 240

190 220 240

240 280 310

240 280 310

300 350 390

180 200 225

200 225 250

70 80 90

130 140 150

130 140 150

200 220 240

200 220 240

260 290 320

260 290 320

340 380 420

340 380 420

430 470 520

250 280 315

280 315 355

100 110 120

170 190 200

170 190 200

260 280 310

260 280 310

350 370 410

350 370 410

460 500 550

460 500 550

570 630 690

355 400 450

400 450 500

130 140 140

220 240 260

220 240 260

340 370 410

340 370 410

450 500 550

450 500 550

600 660 720

600 660 720

750 820 900

500 560 630

560 630 710

150 170 190

280 310 350

280 310 350

440 480 530

440 480 530

600 650 700

600 650 700

780 850 920

780 850 920

1,000 1,100 1,190

710 800 900

800 900 1,000

210 230 260

390 430 480

390 430 480

580 650 710

580 650 710

770 860 930

770 860 930

1,010 1,120 1,220

1,010 1,120 1,220

1,300 1,440 1,570

1,000 1,120 1,250

1,120 1,250 1,400

290 320 350

530 580 640

530 580 640

780 860 950

780 860 950

1,020 1,120 1,240

1,020 1,120 1,240

1,330 1,460 1,620

1,330 1,460 1,620

1,720 1,870 2,080

Table 8.11 Axial internal clearance of four points contact ball bearings Nominal bore diameter

    C2

Unit μm

    CN

    C3

    C4

  d mm over

incl.

min

max

min

max

min

max

min

max

17 40 60

40 60 80

26 36 46

66 86 96

56 76 86

106 126 136

96 116 126

146 166 176

136 156 166

186 206 226

80 100 140 180

100 140 180 220

56 66 76 96

106 126 156 176

96 116 136 156

156 176 196 216

136 156 176 196

196 216 236 256

186 206 226 246

246 266 296 316

A-64


●Bearing Internal Clearance and Preload

Unitμm

Nominal bore diameter

Bearing with tapered bore    C2 min max

CN min

max

   C3 min max

   C4 min max

   C5 min max

  d mm over

incl.

― 15 20

― 25 30

― 25 30

― 35 40

― 35 40

― 45 55

― 45 55

― 60 75

― 60 75

― 75 95

14 18 24

18 24 30

25 30 40

35 45 55

35 45 55

50 60 75

50 60 75

65 80 95

65 80 95

85 100 120

85 100 120

105 130 160

30 40 50

40 50 65

50 55 65

70 80 100

70 80 100

95 110 135

95 110 135

120 140 170

120 140 170

150 180 220

150 180 220

200 230 280

65 80 100

80 100 120

80 90 100

120 130 140

120 130 140

160 180 200

160 180 200

200 230 260

200 230 260

260 300 340

260 300 340

330 380 430

120 140 160

140 160 180

110 120 140

160 180 200

160 180 200

220 250 270

220 250 270

290 320 350

290 320 350

370 410 450

370 410 450

470 520 570

180 200 225

200 225 250

150 170 190

220 240 270

220 240 270

300 330 360

300 330 360

390 430 470

390 430 470

490 540 590

490 540 590

620 680 740

250 280 315

280 315 355

210 230 260

300 330 370

300 330 370

400 440 490

400 440 490

520 570 630

520 570 630

650 720 790

650 720 790

820 910 1,000

355 400 450

400 450 500

290 320 350

410 460 510

410 460 510

540 600 670

540 600 670

680 760 850

680 760 850

870 980 1,090

870 980 1,090

1,100 1,230 1,360

500 560 630

560 630 710

390 440 490

570 640 710

570 640 710

750 840 930

750 840 930

960 1,070 1,190

960 1,070 1,190

1,220 1,370 1,520

1,220 1,370 1,520

1,500 1,690 1,860

710 800 900

800 900 1,000

530 570 620

770 830 910

770 830 910

1,030 1,120 1,230

1,030 1,120 1,230

1,300 1,420 1,560

1,300 1,420 1,560

1,670 1,830 2,000

1,670 1,830 2,000

2,050 2,250 2,470

1,000 1,120 1,250

1,120 1,250 1,400

A-65


●Bearing Internal Clearance and Preload

(1) Bearing's rigidity increases, internal clearance tends not to be produced even when heavy load is applied. (2) The particular frequency of the bearing increases and is becomes suitable for high-speed rotation. (3) Shaft runout is suppressed; rotation and position precision are enhanced. (4) Vibration and noise are controlled. (5) Sliding of rolling elements by turning, spinning, or pivoting, is controlled and smearing is reduced. (6) Fretting produced by external vibration is prevented.

8.3 Preload Normally, bearings are used with a slight internal clearance under operating conditions. However, in some applications, bearings are given an initial load; this means that the bearings' internal clearance is negative before operation. This is called "preload" and is commonly applied to angular ball bearings and tapered roller bearings. 8.3.1 Purpose of preload The following results are obtained by constant elastic compressive force applied to the contact points of rolling elements and raceway by providing preload.

Applying excessive preload could result in reduction of life, abnormal heating, or increase in turning torque. You should therefore consider the objectives before determining the amount of preload.

Table 8.12 Preloading methods and characteristics Method

Basic pattern

Applicable bearings

Fixed position preload Constant pressure preload

Δ

Note: In the above formulas

Characteristics

Applications

Maintaining accuracy of rotating shaft, Angular contact preventing ball bearings vibration increasing rigidity

Preloading is accomplished by a predetermined offset of the rings or by using spacers. For the standard preload see Table 8.13.

Grinding machines, lathes, milling machines, measuring instruments

Tapered roller bearings, thrust Increasing ball bearings, bearing rigidity angular contact ball bearings

Preload is accomplished by adjusting a threaded screw. The amount of preload is set by measuring the starting torque or axial displacement.

Lathes, milling machines, differential gears of automotives, printing machines, wheel axles

Preloading is accomplished by using coil or belleville springs. for deep groove ball bearings: 4∼10 d N 0.4∼1.0 d {kgf} d: Shaft diameter mm for angular contact ball bearings: see Table 8.13.

Internal grinding machines, electric motors, high speed shafts in small machines, tension reels

Angular contact ball bearings, deep groove ball bearings, tapered roller bearings (high speed)

Δ

Object

Maintaining accuracy and preventing vibration and noise with a constant amount of preload without being affected by loads or temperature

Preload is accomplished by using coil or belleville springs. Recommended preloads are as follows: Preload is Spherical roller primarily used to for thrust ball bearings: 1.9 -13 thrust bearings, prevent Rolling mills, T1=0.42 (nCoa) ×10   N 1.9 -13  cylindrical roller smearing of extruding machines  =3.275(nC oa) ×10 {kgf} thrust bearings, opposite axial   load side when T2=0.00083 Coa N{kgf} thrust ball bearing an axial which ever is greater bearings for spherical roller thrust bearings, load. cylindrical roller thrust bearing T=0.025 Coa0.8  N =0.0158 Coa0.8 {kgf} T = preload, N {kgf}

n = number of revolutions, min-1 Coa = basic static axial load rating, N {kgf}

A-66


●Bearing Internal Clearance and Preload

8.3.2 Preloading methods and amounts The most common method of applying preload on a bearing is change the relative position of the inner and outer rings of the bearing in the axial direction while applying an axial load between bearings on opposing sides. There are two types of preload: fixed position preload and constant pressure preload.

8.3.3 Preload and rigidity The increased rigidity effect preloading has on bearings is shown in Fig. 8.2. When the offset inner rings of the two paired angular contact ball bearings are pressed together, each inner ring is displaced axially by the amount δ0 and is thus given a preload, F0, in the direction. Under this condition, when external axial load Fa is applied, bearing!will have an increased , displacement by the amount δa and bearing @s displacement will decrease. At this time the loads applied to bearing!and @ are F! and F@, respectively.

The basic pattern, purpose and characteristics of bearing preloads are shown in Table 8.12. The fixed position preload is effective for positioning the two bearings and also for increasing the rigidity. Due to the use of a spring for the constant pressure preload, the preloading amount can be kept constantly, even when the distance between the two bearings fluctuates under the influence of operating heat and load.

Under the condition of no preload, bearing!will be displaced by the amount δb when axial load Fa is applied. Since the amount of displacement, δa, is less than δb, it indicates a higher rigidity for δa.

Also, the standard preloading amount for the paired angular contact ball bearings is shown in Table 8.13. Light and normal preload is applied to prevent general vibration, and medium and heavy preload is applied especially when rigidity is required.

Bearing2 Bearing1

Axial load

Fa Fo

Fo

Bearing2 Outer ring Steel ball Inner ring

(1) Before preloading

δo δb

δo (2) Under preloading

δo

Bearing1 δa

δo δo

δo

Fo δa F2

(3) Under preloading and applied axial load

δa

Inner ring axial displacement Fo : Preload

Fa F1 Fa

Fo

Inner ring axial displacement F1= F2+ Fa Fa: External axial load

δa

F2 Axial displacement δ1 δo

δ2 δo F1= F2+ Fa

Fig. 8.2 Fixed position preload model diagram and preload diagram

A-67


●Bearing Internal Clearance and Preload

Table 8.13 The normal preload of duplex angular contact ball bearings Bearing

Nominal bore diameter d mm

79 Low GL

Normal GN

70 Central GM

Heavy GH

Low GL

Normal GN

Central GM

Heavy GH

over

incl.

− 12 18

12 18 32

―   ―   29{ 3}

39{ 4} 49{ 5} 98{ 10}

78{ 8} 147{ 15} 196{ 20}

147{ 15} 196{ 20} 294{ 30}

29{ 3} 29{ 3} 49{ 5}

78{ 8} 78{ 8} 147{ 15}

147{ 15} 147{ 15} 294{ 30}

32 40 50

40 50 65

49{ 5} 49{ 5} 78{ 8}

147{ 15} 196{ 20} 245{ 25}

294{ 30} 390{ 40} 490{ 50}

590{ 60} 685{ 70} 785{ 80}

78{ 8} 78{ 8} 147{15}

294{ 30} 294{ 30} 490{ 50}

590{ 60} 590{ 60} 880{ 90}

885{ 90} 980{ 100} 1,470{ 150}

65 80 90

80 90 95

98{10} 147{15} 147{15}

390{ 40} 490{ 50} 490{ 50}

785{ 80} 980{100} 980{100}

1,180{120} 1,470{150} 1,470{150}

147{15} 196{20} 196{20}

590{ 60} 885{ 90} 885{ 90}

1,470{150} 1,960{200} 1,960{200}

1,960{ 200} 2,940{ 300} 2,940{ 300}

95 100 105

100 105 110

196{20} 196{20} 196{20}

685{ 70} 685{ 70} 685{ 70}

1,270{130} 1,270{130} 1,270{130}

1,960{200} 1,960{200} 1,960{200}

196{20} 294{30} 294{30}

885{ 90} 980{100} 980{100}

1,960{200} 2,450{250} 2,450{250}

2,940{ 300} 3,900{ 400} 3,900{ 400}

110 120 140

120 140 150

245{25} 294{30} 390{40}

885{ 90} 980{100} 1,270{130}

1,780{180} 1,960{200} 2,450{250}

2,940{300} 3,450{350} 4,400{450}

294{30} 490{50} 490{50}

980{100} 1,470{150} 1,470{150}

2,450{250} 3,450{350} 3,450{350}

3,900{ 400} 5,900{ 600} 5,900{ 600}

150 160 170

160 170 180

390{40} 390{40} 490{50}

1,270{130} 1,270{130} 1,770{180}

2,450{250} 2,450{250} 3,450{350}

4,400{450} 4,400{450} 5,900{600}

685{70} 685{70} 685{70}

2,450{250} 2,450{250} 2,450{250}

4,900{500} 4,900{500} 4,900{500}

8,850{ 900} 8,850{ 900} 8,850{ 900}

180 190

190 200

490{50} 685{70}

1,770{180} 2,450{250}

3,450{350} 4,900{500}

5,900{600} 7,850{800}

885{90} 885{90}

3,450{350} 3,450{350}

6,850{700} 6,850{700}

9,800{1,000} 9,800{1,000}

A-68

196{ 294{ 490{

20} 30} 50}


●Bearing Internal Clearance and Preload

unit N {kgf} series 72, 72B Low GL

73, 73B

Normal GN

Central GM

Heavy GH

Low GL

Normal GN

Central GM

3} 3} 8}

98{ 10} 98{ 10} 196{ 20}

196{ 20} 294{ 30} 490{ 50}

294{ 390{ 785{

30} 40} 80}

49{ 5} 49{ 5} 98{ 10}

147{ 15} 147{ 15} 294{ 30}

294{ 390{ 590{

98{ 10} 147{ 15} 196{ 20}

390{ 40} 590{ 60} 785{ 80}

885{ 90} 980{100} 1,470{150}

1,470{ 150} 1,960{ 200} 2,940{ 300}

147{ 15} 196{ 20} 294{ 30}

294{ 30} 490{ 50} 490{ 50}

980{100} 1,470{150} 1,960{200}

2,450{250} 2,940{300} 3,900{400}

3,900{ 400} 4,900{ 500} 5,900{ 600}

490{ 50} 590{ 60} 590{ 60}

1,960{200} 2,450{250} 2,450{250}

3,900{400} 4,900{500} 4,900{500}

590{ 60} 785{ 80} 785{ 80}

2,450{250} 2,940{300} 2,940{300}

885{ 90} 885{ 90} 885{ 90} 980{100} 980{100}

29{ 29{ 78{

Heavy GH 30} 40} 60}

390{ 40} 490{ 50} 980{ 100}

490{ 50} 785{ 80} 980{100}

980{ 100} 1,470{ 150} 2,450{ 250}

1,960{ 200} 2,450{ 250} 3,900{ 400}

390{ 40} 590{ 60} 590{ 60}

1,470{150} 1,960{200} 2,450{250}

3,450{ 350} 3,900{ 400} 4,900{ 500}

4,900{ 500} 5,900{ 600} 6,850{ 700}

5,900{ 600} 7,850{ 800} 7,850{ 800}

590{ 60} 685{ 70} 685{ 70}

2,450{250} 2,940{300} 2,940{300}

4,900{ 500} 5,900{ 600} 5,900{ 600}

6,850{ 700} 8,850{ 900} 8,850{ 900}

4,900{500} 5,900{600} 5,900{600}

7,850{ 800} 9,800{1,000} 9,800{1,000}

685{ 70} 885{ 90} 885{ 90}

2,940{300} 3,900{400} 3,900{400}

5,900{ 600} 7,850{ 800} 7,850{ 800}

8,850{ 900} 11,800{1,200} 11,800{1,200}

3,900{400} 3,900{400} 3,900{400}

7,850{800} 7,850{800} 7,850{800}

11,800{1,200} 11,800{1,200} 11,800{1,200}

980{100} 980{100} 980{100}

4,400{450} 4,400{450} 4,400{450}

8,800{ 900} 8,800{ 900} 8,800{ 900}

13,700{1,400} 13,700{1,400} 13,700{1,400}

4,400{450} 4,400{450}

8,850{900} 8,850{900}

13,700{1,400} 13,700{1,400}

1,470{150} 1,470{150}

5,900{600} 5,900{600}

11,800{1,200} 11,800{1,200}

15,700{1,600} 15,700{1,600}

A-69


●Allowable Speed 9. Allowable Speed As rotational speed of the bearing increase, the temperature of the bearing also rises due to heat produced inside the bearing by friction. This causes damage to the bearing such as seizure, and the bearing will be unable to continue stable operation. Therefore, the maximum speed at which it is possible for the bearing to continuously operate without the generation of excessive heat beyond specified limits, is called the allowable speed (min-1). The allowable speed of a bearing depends on the type of bearing, bearing dimensions, type of cage, load, lubricating conditions, and cooling conditions.

Under such high speed operating conditions, when special care is taken, the standard allowable speeds given in the bearing tables can be adjusted upward. The maximum speed adjustment values, f B, by which the bearing table speeds can be multiplied, are shown in Table 9.1. However, for any application requiring speeds in excess of the standard allowable speed, please consult NTN Engineering.

1.0

The bearing dimensions table gives approximate allowable rotational speeds for grease and oil lubrication. The values are based on the following: ¡The bearing must have the proper internal clearance prescribed in the NTN Engineering standard design specifications and must be properly installed. ¡A quality lubricant must be used. The lubricant must be replenished and changed when necessary. ¡The bearing must be operated at normal operating temperature under ordinary load conditions (P≦0.09 Cr, Fa / Fa≦0.3).

0.9

fL

0.8

0.7

0.6

0.5 5

6

7

8

9

10

11

Cr P

If load is P≦0.04 Cor, the rolling elements may not turn smoothly. If so, please contact NTN Engineering for more information. Allowable rotational speed for deep groove ball bearings with contact seal (LLU type) or low-torque seal (LLH type) is determined according to the circumferential speed of the seal.

Fig. 9.1 Value of adjustment factor fL depends on bearing load

1.0

Angular

For bearings to be used under heavier than normal load conditions, the allowable speed values listed in the bearing tables must be multiplied by an adjustment factor. The adjustment factors f L and f C are given in Figs. 9.1 and 9.2.

contact ba

0.9 Deep g

roove b

ll bearings

all beari

ngs

fC

0.8

Tap Cyli ered ro ndr ical ller be rolle arin r be gs arin gs ( F

0.7

Also, when radial bearings are mounted on vertical shafts, lubricant retentions and cage guidance are not favorable compared to horizontal shaft mounting. Therefore, the allowable speed should be reduced to approximately 80% of the listed speed.

0.6

a/F r≦

2e)

0.5

0

0.5

1.0

1.5

2.0

Fa Fr

For speeds other than those mentioned above, and for which data is incomplete, please consult NTN Engineering.

Fig. 9.2 Value of adjustment factor fC depends on combined load

Table 9.1 Adjustment factor, fB, for allowable number of revolutions

If rotational speed is to exceed allowable rotational speed given in the dimensions table, it will require special considerations such as using a bearing for which cage specifications, internal clearance and precision have been thoroughly checked. It will also require adopting forced circulation, jet oil or mist oil lubrication as the lubrication method.

Type of bearing Deep groove ball bearings Angular contact ball bearings Cylindrical roller bearings Tapered roller bearings

A-70

Adjustment factor fB 3.0 2.0 2.5 2.0


●Friction and Temperature Rise 10. Friction and Temperature Rise 10.1 Friction

10.2 Temperature rise

One of the main functions required of a bearing is that it must have low friction. Under normal operating conditions rolling bearings have a much smaller friction coefficient than the slide bearings, especially starting friction.

Almost all friction loss in a bearing is transformed into heat within the bearing itself and causes the temperature of the bearing to rise. The amount of thermal generation caused by friction moment can be calculated using formula (10.2).

The friction coefficient for rolling bearings is expressed by formula (10.1).

Q=0.105×10 Mn N ……………… (10.2) -6 =1.03×10 Mn{kgf} where, Q:Thermal value, kW M:Friction moment, N・mm{kgf・fmm} n:Rotational speed, min-1

-6

2M μ= Pd …………………………………… (10.1) where, μ:Friction coefficient M :Friction moment, N・mm{kgf・fmm} P :Load, N{kgf} d :Bearing bore diameter, mm

Bearing operating temperature is determined by the equilibrium or balance between the amount of heat generated by the bearing and the amount of heat conducted away from the bearing. In most cases the temperature rises sharply during initial operation, then increases slowly until it reaches a stable condition and then remains constant. The time it takes to reach this stable state depends on the amount of heat produced, heat capacity/diffusion of the shaft and bearing housing, amount of lubricant and method of lubrication. If the temperature continues to rise and does not become constant, it must be assumed that there is some improper function.

Although the dynamic friction coefficient for rolling bearings varies with the type of bearings, load, lubrication, speed, and other factors; for normal operating conditions, the approximate friction coefficients for various bearing types are listed in Table 10.1.

Table 10.1 Friction coefficient for bearings (reference) -3

Bearing type

Coefficient μ×10

Deep groove ball bearings Angular contact ball bearings Self-aligning ball bearings Cylindrical roller bearings Needle roller bearings Tapered roller bearings Spherical roller bearings Thrust ball bearings Thrust roller bearings

1.0∼1.5 1.2∼1.8 0.8∼1.2 1.0∼1.5 2.0∼3.0 1.7∼2.5 2.0∼2.5 1.0∼1.5 2.0∼3.0

Possible causes of abnormal temperature include bearing misalignment (due to moment load or incorrect installation), insufficient internal clearance, excessive preload, too much or too little lubricant, or heat produced from sealed units. Check the mechanical equipment, and if necessary, remove and inspect the bearing.

A-71


●Lubrication 11. Lubrication Fig. 11.1 shows the relationship between oil volume, friction loss, and bearing temperature. Table 11.1 details the characteristics of this relationship.

11.1 Purpose of lubrication The purpose of bearing lubrication is to prevent direct metallic contact between the various rolling and sliding elements. This is accomplished through the formation of a thin oil (or grease) film on the contact surfaces. However, for rolling bearings, lubrication has the following advantages:

11.2 Lubrication methods and characteristics Lubrication method for bearings can be roughly divided into grease and oil lubrication. Each of these has its own features, so the lubrication method that best offers the required function must be selected. The characteristic are shown in Table 11.2.

(1) Reduction of friction and wear (2) Dissipation of friction heat (3) Prolonged bearing life (4) Prevention of rust (5) Protection against harmful elements

Table 11.2 Comparison of grease lubrication and oil lubrication characteristics Method

high

high

In order to exhibit these effects, a lubrication method that matches service conditions. In addition to this, a quality lubricant must be selected, the proper amount of lubricant must be used and the bearing must be designed to prevent foreign matter from getting in or lubricant from leaking out.

Friction loss

A

B

C

D

Grease lubrication

Handling

Reliability

Cooling effect

×

○ necessary)

Seal structure

Power loss

Environment contamination

High speed rotation

×

Oil lubrication

(Circulation

◎: Very good ○:Good △:Fair ×:Poor

Friction loss

Temperature increase

Temperature increase

Concern

11.3 Grease lubrication Grease lubricants are relatively easy to handle and require only the simplest sealing devices. For these reasons, grease is the most widely used lubricant for rolling bearings. It is used a bearing that is pre-sealed with grease (sealed/shield bearing), or if using an unsealed bearing, fill the bearing and housing with the proper amount of grease, and replenish or change the grease regularly.

E

Oil volume great Fig. 11.1

11.3.1 Types and characteristics of grease Lubricating grease are composed of either a mineral oil base or a synthetic oil base. To this base a thickener and other additives are added. The properties of all greases are mainly determined by the kind of base oil used and by the combination of thickening agent and various additives. Table 11.5 shows general grease varieties and characteristics, and Table 11.6 shows grease brand names and their natures. (See pages A-74 and A-75.) As performance characteristics of even the same type of grease will vary widely from brand to brand, it is necessary to check the manufacturers' data when selecting a grease.

Table 11.1 Oil volume, friction loss, bearing temperature (See Fig. 11.1) Range

Characteristics

Lubrication method

A

When oil volume is extremely low, direct metallic contact occurs in places between the rolling elements and raceway surfaces. Bearing abrasion and seizing occur.

――

B

A thin oil film develops over all surfaces, friction is minimal and bearing temperature is low.

Grease lubrication, oil mist, air-oil lubrication

C

As oil volume increases, heat buildup is balanced by cooling.

Circulating lubrication

D

Regardless of oil volume, temperature increases at a fixed rate.

Circulating lubrication

E

Forced circulation As oil volume increases, cooling predominates and bearing temperature lubrication, Oil jet lubrication decreases.

(1) Base oil Mineral oil or synthetics such as ester or ether oil are used as the base of the grease. Mainly, the properties of any grease is determined by the properties of the base oil. Generally, greases with low A-72


●Lubrication

viscosity base oil are best suited for low temperatures and high speeds; Grease using high-viscosity base oil has superior high-temperature and high-load characteristics.

Table 11.3 Consistency of grease

(2) Thickening agents Thickening agents are compounded with base oils to maintain the semi-solid state of the grease. Thickening agents consist of two types of bases, metallic soaps and non-soaps. Metallic soap thickeners include: lithium, sodium, calcium, etc.

NLGI Consistency No.

JIS (ASTM) 60 times blend consistency

0

355∼385

For centralized greasing use

1

310∼340

For centralized greasing use

2

265∼295

For general use and sealed bearing use

3

220∼250

For general use and high temperature use

4 

175∼205  For special use

Applications

Non-soap base thickeners are divided into two groups; inorganic (silica gel, bentonite, etc.) and organic (polyurea, fluorocarbon, etc.). 11.3.2 Amount of grease The amount of grease used in any given situation will depend on many factors relating to the size and shape of the housing, space limitations, bearing's rotating speed and type of grease used.

The various special characteristics of a grease, such as limiting temperature range, mechanical stability, water resistance, etc. depend largely on the type of thickening agent used. For example, a sodium based grease is generally poor in water resistance properties, while greases with bentone, poly-urea and other non-metallic soaps as the thickening agent are generally superior in high temperature properties.

As a rule of thumb, bearings should be filled to 30 to 40% of their space and housing should be filled 30 to 60%. Where speeds are high and temperature rises need to be kept to a minimum, a reduced amount of grease should be used. Excessive amount of grease cause temperature rise which in turn causes the grease to soften and may allow leakage. With excessive grease fills oxidation and deterioration may cause lubricating efficiency to be lowered.

(3) Additives Various additives are added to greases to improve various properties and efficiency. For example, there are anti-oxidents, high-pressure additives (EP additives), rust preventives, and anti-corrosives. For bearings subject to heavy loads and/or shock loads, a grease containing high-pressure additives should be used. For comparatively high operating temperatures or in applications where the grease cannot be replenished for long periods, a grease with an oxidation stabilizer is best to use.

Moreover, the standard bearing space can be found by formula (11.1) V=K・W ……………………………… (11.1) where, V : Quantity of bearing space open type (approx.), cm3 K : Bearing space factor (see value of K in Table 11.4) W : Mass of bearing, kg

(4) Consistency Consistency is an index that indicates hardness and fluidity of grease. The higher the number, the softer the grease is. The consistency of a grease is determined by the amount of thickening agent used and the viscosity of the base oil. For the lubrication of rolling bearings, greases with the NLGI consistency numbers of 1, 2, and 3 are used.

Table 11.4 Bearing space factor K

General relationships between consistency and application of grease are shown in Table 11.3.

   

(5) Mixing of greases When greases of different kinds are mixed together, the consistency of the greases will change (usually softer), the operating temperature range will be lowered, and other changes in characteristics will occur. As a rule, grease should not be mixed with grease of any other brand.

Bearing type    

Cage type  Pressed cage

61

  NU-type cylindrical roller bearings 2                

Pressed cage Machined cage

50 36

  N-type cylindrical roller bearings 3                 

Pressed cage Machined cage

55 37

 Tapered roller bearings

Pressed cage

46

Pressed cage Machined cage

35 28

Spherical roller bearings

1 Does not apply top 160 series bearings. 2 Does not apply to NU4 series bearings. 3 Does not apply to N4 series bearings.

However, if different greases must be mixed, at least greases with the same base oil and thickening agent should be selected.

A-73

K

 Ball bearings 1


●Lubrication

Table 11.5 Grease varieties and characteristics Grease name

Lithium grease

Sodium grease (Fiber grease)

Calcium compound base grease

Thickener

Li soap

Na soap

Ca+Na soap Ca+Li soap

Base oil

Mineral oil

Diester oil

Silicone oil

Mineral oil

Mineral oil

Dropping point ˚C

170 ∼ 190

170 ∼ 190

200 ∼ 250

150 ∼ 180

150 ∼ 180

Operating temperature range ˚C

-30 ∼ +130

-50 ∼ +130

-50 ∼ +160

-20 ∼ +130

-20 ∼ +120

Mechanical stability

Excellent

Good

Good

Excellent ∼ Good

Excellent ∼ Good

Pressure resistance

Good

Good

Poor

Good

Excellent ∼ Good

Water resistance

Good

Good

Good

Good ∼ Poor

Good ∼ Poor

Widest range of applications. Applications

Grease used in all types of rolling bearings.

Excellent low temperature and wear characteristics.

Suitable for high and low temperatures.

Some emulsification when water is introduced.

Excellent pressure resistance and mechanical stability.

Suitable for small sized and miniature bearings.

Unsuitable for heavy load applications due to low oil film strength.

Excellent characteristics at relatively high temperatures.

Suitable for bearings receiving shock loads.

Table 11.6 Grease brands and their nature Manufacturer

Brand name

NTN code

Thickener

Base oil

Alvania Grease S2

2AS

Lithium

Mineral oil

Alvania Grease S3

3AS

Lithium

Mineral oil

Alvania EP Grease 2

8A

Lithium

Mineral oil

Aero Shell Grease 7

5S

Microgel

Diester

Multemp PS No. 2

1K

Lithium

Diester

Multemp SRL

5K

Lithium

Tetraesterdiester

E5

L417

Urea

Ether

Temprex N3 / Unilex N3

2E

Complex Li

Synthetic hydrocarbon

Beacon 325

3E

Lithium

Diester

Isoflex Super LDS18

6K

Lithium

Diester

Barrierta JFE552

LX11

Fluoride

Fluoride oil

Grease J

L353

Urea

Ester

SH33L

3L

Lithium

Methyl phenyl oil

SH44M

4M

Lithium

Methyl phenyl oil

Multi Nok wide No. 2

6N

Sodium lithium

Diester mineral oil

U-4

L412

Urea

Synthetic hydrocarbon + dialkyldiphenyl ether

MP-1

L448

Diurea

PAO + ester

Apolo Autolex A

5A

Lithium

Mineral oil

Mobile Grease 28

9B

Bentone

Synthetic hydrocarbon

Cosmo Wide Grease WR3

2M

Na terephthalate

Diester mineral oil

Demnum L200

LX23

PTFE

Fluoride oil

Showa Shell Sekiyu

Kyodo Yushi

Esso Sekiyu

NOK Kluber

Toray Dow Corning, Silicone

Nippon Oil Nihon Grease Idemitsu Kosan Mobil Sekiyu Cosmo Oil Daikin

Note: For nature, see the manufacturer's catalog.

A-74


●Lubrication

Non-soap base grease

Aluminum grease

Bentone, silica gel, urea, carbon black, fluorine compounds, etc.

AI soap Mineral oil

Mineral oil

Synthetic oil

70 ∼ 90

250 or above

250 or above

-10 ∼ +80

-10 ∼ +130

-50 ∼ +200

Good ∼ Poor

Good

Good

Good

Good

Good

Good

Good

Good

Can be used in a wide range of low to high temperatures. Shows excellent heat resistance, cold resistance, chemical resistance, and other characteristics when matched with a suitable base oil and thickener.

Excellent adhesion

Suitable for bearings Grease used in all types of rolling bearings. receiving vibration

Base oil viscosity

Consistency

Dropping point˚C

Operating temperature˚C

Color

Characteristics

37.8˚C

140mm2/s

273

181

−25∼120

Amber

All-purpose grease

37.8˚C

140mm2/s

232

183

−25∼135

Amber

All-purpose grease

98.9˚C

15.3mm2/s

276

187

−20∼110

Brown

All-purpose extreme-pressure

98.9˚C

3.1mm2/s

288

Min. 260

−73∼149

Yellow-brown

37.8˚C

15.3mm /s

265∼295

190

−55∼130

White

For low temperature and low torque

40˚C

26mm2/s

250

192

−40∼150

White

Wide range

40˚C

72.3mm2/s

300

240

−30∼180

White

For high temperature

40˚C   113mm2/s

220∼250

Min. 300

−30∼160

Green

For high temperature

40˚C

 11.5mm /s

265∼295

177

−60∼120

Brown

For low temperature and low torque

40˚C

16.0mm2/s

265∼295

Min. 180

−60∼130

Yellow-green

For low temperature and low torque

40˚C

400mm2/s

290

−35∼250

White

40˚C

75mm2/s

280

−20∼180

Gray-white

For high temperature

25˚C

100mm /s

300

200

−70∼160

Light red-gray

For low temperature

40˚C

32mm2/s

260

210

−40∼180

Brown

For high temperature

37.8˚C

30.9mm2/s

265∼295

215

−40∼135

Light brown

40˚C

  58mm2/s

255

260

−40∼180

Milk-white

40˚C

40.6mm /s

243

254

−40∼150

Light brown

37.8˚C

50mm2/s

265∼295

192

−25∼150

Yellow

40˚C

28mm2/s

315

Min. 260

−62∼177

Red

37.8˚C

30.1mm2/s

265∼295

Min. 230

−40∼150

Light brown

40˚C

  200mm /s

−60∼300

White

2

2

2

2

2

280

A-75

MIL-G-23827

Wide range For high temperature Wide range All-purpose grease MIL-G-81322C Wide range Wide range


●Lubrication

therefore,

11.3.3 Grease replenishment As the lubricating efficiency of grease declines with the passage of time, fresh grease must be re-supplied at proper intervals. The replenishment time interval depends on the type of bearing, dimensions, bearing's rotating speed, bearing temperature, and type of grease.

The point where vertical line!intersects a horizontal line drawn from the point equivalent of d = 30 for the radial ball bearing shown in Fig. 11.2 shall be point A. Find intersection point C where vertical line@intersects the straight line formed by joining point B (no/n = 2.93) with A with a straight line. It shows that grease life in this case is approximately 5,500 hours.

An easy reference chart for calculating grease replenishment intervals is shown in Fig. 11.2.

11.4 Solid grease (For bearings with solid grease)

This chart indicates the replenishment interval for standard rolling bearing grease when used under normal operating conditions.

"Solid grease" is a lubricant composed mainly of lubricating grease and ultra-high polymer polyethylene. Solid grease has the same viscosity as grease at normal temperature, If heated once and cooled (this process is referred to as "calcination") the grease hardens while maintaining a large quantity of lubricant. The result of this solidification is that the grease does not easily leak from the bearing, even when the bearing is subjected to strong vibrations or centrifugal force. Bearings with solid grease are available in two types: the spot-pack type in which solid grease is injected into the cage, and the full-pack type in which all empty space around the rolling elements is filled with solid grease. Spot-pack solid grease is standard for deep groove ball bearings, small diameter ball bearings, and bearing units. Full-pack solid grease is standard for self-aligning ball bearings, spherical roller bearings, and needle roller bearings. Primary advantages: (1) Grease leakage is minimal. (2) Low bearing torque with spot-pack type solid grease

As operating temperatures increase, the grease resupply interval should be shortened accordingly. Generally, for every 10˚C increase in bearing temperature above 80˚C, the relubrication period is reduced to "1/1.5". no /n @ 20.0 15.0 400 300 200 100 50 40 30 20 10 7

Bearing bore d, mm

!

Relubrication interval, h # 20 000

10.0 9.0 8.0 7.0 6.0

10 000

5.0

30 000

A

200

20 10

100 50 30 20

500 300 200 100 50 30 20

Spherical roller bearings Tapered roller bearings Cylindrical roller bearings

100 50 30

Thrust ball bearings

Radial ball bearings

500 300 200

5 000 4 000 3 000

C

4.0 3.0

10,560 no = =2.93 n 3,600

For more details, please refer to NTN special catalog of Solid grease bearings.

B

2 000 2.0 1 000

Solid grease

1.5 500 400 300 1.0 0.9

no: fL×fC×limiting speed for grease (dimension tables) see Fig. 9.1, Fig. 9.2 n : actual rotational speed

0.8

0.7

Fig. 11.2 Diagram for relubrication interval of greasing

Fig. 11.3 Deep groove ball bearing with spot-pack solid grease (Z shield) (Standard for deep groove ball bearings)

――――――――――――――――――――――――――――――――――――

(Example) Find the grease relubrication time limit for deep groove ball bearing 6206, with a radial load of 2.0 kN {204kgf} operating at 3,600 min-1.

Solid grease

――――――――――――――――――――――――――――――――――――

Cr / Pr = 19.5/2.0 kN = 9.8 from Fig. 11.1, the ajustment factor, fL, is 0.96. Allowable rotational speed from the dimensions tables for bearing 6206 is 11,000 min-1. Allowable rotational speed no for a 2.0 kN {204 kgf} radial load is: Fig. 11.4 Spherical roller bearing with full-pack solid grease (Standard for spherical roller bearings)

no = 0.96×11,000 = 10,560 min-1 A-76


●Lubrication

11.5 Oil lubrication dissipated to the outside.Table 11.7 shows the main methods of oil lubrication.

Oil lubrication is suitable for applications requiring that bearing-generated heat or heat applied to the bearing from other sources be carried away from the bearing and Table 11.7 Oil lubrication methods Lubrication method (Oil bath lubrication) ¡Oil bath lubrication is the most generally used method of lubrication and is widely used for low to moderate rotation speed applications. ¡For horizontal shaft applications, oil level should be maintained at approximately the center of the lowest rolling element, according to the oil gauge, when the bearing is at rest. For vertical shafts at low speeds, oil level should be maintained at 50 80% submergence of the rolling elements.

Example

Lubrication method (Disc lubrication) ¡In this method, a partially submerged disc rotates and pulls oil up into a reservoir from which it then drains down through the bearing, lubricating it.

(Oil spray lubrication) ¡In this method, an impeller or similar device mounted on the shaft draws up oil and sprays it onto the bearing. This method can be used at considerably high speeds.

(Oil mist lubrication) ¡Using pressurized air, lubricating oil is atomized before passing through the bearing. ¡Due to the low lubricant resistance, this method is well suited to high speed applications.

(Drip lubrication)

(Air-oil lubrication)

¡In this method, oil is collected above the bearing and allowed to drip down into the housing where it becomes a lubricating mist as it strikes the rolling elements. Another version allows only slight amounts of oil to pass through the bearing. ¡Used at relatively high speeds for light to moderate load applications. ¡In most cases, oil volume is a few drops per minute.

(Circulating lubrication)

Example

¡In this method, the required minimum amount of lubricating oil is measured and fed to each bearing at ideal intervals using compressed air. ¡With fresh lubricating oil constantly being fed to the bearing, and with the cooling effect of the compressed air, bearing temperature rise can be minimized. ¡Because the required oil quantity is infinitesimal, the working environment can be kept clean.  Air-oil lubrication units are available from NTN.

(Oil jet lubrication)

¡Used for bearing cooling applications or for automatic oil supply systems in which the oil supply is centrally located. ¡One of the advantages of this method is that oil cooling devices and filters to maintain oil purity can be installed within the system. ¡In order for oil to thoroughly lubricate the bearing, oil inlets and outlets must be provided on opposite sides of the bearing.

¡This method lubricates by injecting oil under high pressure directly into the side of the bearing. This is a reliable system for high speed, high temperature or otherwise severe conditions. ¡Used for lubricating the bearings in jet engines, gas turbines, and other high speed equipment. ¡Under-race lubrication for machine tools is one example of this type of lubrication.

A-77

Mist separator

Reservoir (level switch) Oil

Air Air filter

Air oil line

Solenoid valve T Timer Air Pressure switch

Nozzle


●Lubrication

11.5.2 Oil quantity In forced oil lubrication systems, the heat radiated away by the housing and surrounding parts plus the heat carried away by the lubricating oil is approximately equal to the amount of heat generated by the bearing and other sources.

11.5.1 Selection of lubricating oil Under normal operating conditions, spindle oil, machine oil, turbine oil, and other mineral oils are widely used for the lubrication of rolling bearings. However, for temperatures above 150˚C or below -30˚C, synthetic oils such as diester oil, silicone oil, and fluorocarbon oil are used. For lubricating oils, viscosity is one of the most important properties and determines an oil’s lubricating efficiency. If viscosity is too low, formation of the oil film will be insufficient, and damage will occur to the raceways of the bearing. If viscosity is too high, viscous resistance will also be great and result in temperature increases and friction loss. In general, for higher speed applications a lower viscosity oil should be used; for heavier load applications, a higher viscosity oil should be used. In regard to operating temperature, Table 11.8 lists the required oil viscosity for different types of rolling bearings. Fig. 11.5 is an oil viscosity - operating temperature comparison chart for the purpose of selecting a lubrication oil with viscosity characteristics appropriate to an application. Table 11.9 lists the selection standards for lubricating oil viscosity with reference to bearing operating conditions.

For general housing applications, the required quantity of oil can be found by formula (11.2). Q=K・q ……………………………… (11.2) where, Q: Quantity of oil for one bearing cm3/min. K: Allowable oil temperature rise factor (Table 11.10) q : Amount of lubrication determined by diagram cm3/min. (Fig. 11.4) Because the amount of heat radiated will vary according to the type of housing, for actual operation it is advisable that the quantity of oil calculated by formula

3,000 2,000 500 300 200

Viscosity mm2/s

100

Table 11.8 Required lubricating oil viscosity for bearings Kinematic viscosity mm2 /s

Bearing type Ball bearings, Cylindrical roller bearings, Needle roller bearings Spherical roller bearings, Tapered roller bearings, Needle roller thrust bearings Self-aligning roller thrust bearings

1: 2: 3: 4: 5: 6: 7:

1,000

30 20 15

1 2

10

6 5

6

4

20

VG 320 VG 150 VG 68 VG 46 VG 32 VG 22 VG 15

50

8

13

ISO ISO ISO ISO ISO ISO ISO

3 4 5

7 3

30

- 30

- 20

- 10

0

10

20

30

40

50

60

70

80

90

100 110 120 130 140 150 160

Temperature ˚C

FIg. 11.5 Relation between lubricating oil viscosity and temperature Table 11.9 Selection standards for lubricating oils (Reference) Bearing operating temperature ˚C −30∼

0

0∼ 60

60∼100

dn-value Up to allowable rotational speed

Lubricating oil ISO viscosity grade (VG)

Suitable bearing

Normal load

Heavy load or shock load

22,32

46

All types

Up to 15,000

46,68

100

All types

15,000 ∼80,000

32,46

68

All types

80,000 ∼150,000

22,32

32

All types but thrust ball bearings

150,000∼500,000

10

22,32

Single row radial ball bearings, cylindrical roller bearings

Up to 15,000

150

220

All types

15,000 ∼80,000

100

150

All types

80,000 ∼150,000

68

100,150

All types but thrust ball bearings

150,000∼500,000

32

68

Single row radial ball bearings, cylindrical roller bearings

100 ∼150

Up to allowable rotational speed

320

0∼ 60

Up to allowable rotational speed

46,68

60∼100

Up to allowable rotational speed

150

All types Self-aligning roller bearings

Note 1: Applied when lubrication method is either oil bath or circulating lubrication. 2: Please consult NTN Engineering in cases where operating conditions fall outside the range covered by this table.

A-78


●Lubrication

11.5.3 Relubrication intervals The intervals at which lubricating oil should be changed varies depending upon operating conditions, oil quantity, and type of oil used. In general, for oil bath lubrication where the operating temperature is 50˚C or less, oil should be replaced once a year. When the operating temperature is between 80˚C – 100˚C, oil should be replaced at least every three months. For important equipment, it is advisable that lubricating efficiency and oil purity deterioration be checked regularly to determine when oil replacement is necessary.

Table 11.10 Factor K Expelled oil temp minus supplied oil temp ˚C

K

10       1.5 15       1 20       0.75 25       0.6

(11.2) be multiplied by a factor or 1.5 or 2.0. Then, the amount of oil can be adjusted to correspond to actual operating conditions. Furthermore, if it is assumed for calculation purposes that no heat is radiated by the housing, and that all bearing heat is removed by the oil, then the value for shaft diameter, d = 0. ――――――――――――――――――――――――――――――――――――

(Example) For tapered roller bearing 30220U mounted on a flywheel shaft with a radial load of 9.5 kN{969 kgf}, operating at 1,800 min-1, what is the amount of lubricating oil‘Q’required to keep the bearing temperature rise below 15˚C.

――――――――――――――――――――――――――――――――――――

d = 100 mm, dn = 100×1,800=18×104 From Fig. 11.6 q = 180cm3 / min Assume the bearing temperature is approximately equal to the expelled oil temperature, from Table 11.10, since K = 1 Q=1×180=180cm3 / min

r

1

2

dn×

10 4

3 4

5 6

Bearing type Spherical roller bearings Tapered roller bearings Angular contact ball bearings Deep groove ball bearings, Cylindrical roller bearings

8 10

dP Loa kgf kN 30,000 00 300 20,0 200 Shaft 0 diameter 0,00 1 0 d 100 7,00 mm 0 7 0 6,00 160 0 0 0 60 , 4 140 40 0 3,00 30 100 0 80 2,00 60 20 0 0 5 40 20 1, 15 0 0 1,00 10 800 8 600

6

15

4

20 30 40

2

400 200

Oil quantity q cm3/min

100 200 300 400 500 600 700 800 900 1,000 1,100 1,200

Fig. 11.6 Oil quantity guidelines

A-79


●External bearing sealing devices 12. External bearing sealing devices formed synthetic rubber lip on a steel plate is pressed against the shaft. Contact seals are generally far superior to non-contact seals in sealing efficiency, although their friction torque and temperature rise coefficients are higher. Furthermore, because the lip portion of a contact seal slides while in contact with the shaft, the allowable seal peripheral speed varies depending on seal type.

External seals have two main functions: to prevent lubricating oil from leaking out, and, to prevent dust, water, and other contaminants from entering the bearing. When selecting a seal, the following factors need to be taken into consideration: the type of lubricant (oil or grease), seal peripheral speed, shaft fitting errors, space limitations, seal friction and resultant heat increase, and cost. Sealing devices for rolling bearings fall into two main classifications: non-contact seals and contact seals.

Lubrication is required in the place where the seal lip makes contact with the shaft. Ordinary bearing lubricant can also be used for this purpose.

¡Non-contact seals: Non-contact seals utilize a small clearance between the shaft and the housing cover. Therefore friction is negligible, making them suitable for high speed applications. In order to improve sealing capability, clearance spaces are often filled with lubricant.

The following chart lists the special characteristics of seals and other points to be considered when choosing an appropriate seal.

¡Contact seals: A contact seal is a seal whereby a

Type

Seal construction

Name

Seal characteristics and selection considerations

Clearance seal

This is an extremely simple seal design with a small radial clearance.

Oil groove seal

Several concentric oil grooves are provided on the housing inner diameter to greatly improve the sealing effect. When the grooves are filled with lubricant, the intrusion of contaminants from the outside is prevented.

(oil grooves on housing side)

Oil groove seal

Non-contact seals

(oil grooves on shaft and housing side)

Oil grooves are provided on both the shaft outer diameter and housing inner diameter for a seal with even greater sealing efficiency.

Axial labyrinth seal

This seal has a labyrinth passageway on the axial side of the housing.

Radial labyrinth seal

A labyrinth passageway is affixed to the radial side of the housing. For use with split housings. This offers better sealing efficiency than axial labyrinth seals.

Aligning labyrinth seal

The seal's labyrinth passageway is slanted and has sufficient clearance to prevent contact between the housing projections and the shaft even as the shaft realigns.

A-80

Cautionary points regarding selection ・In order to improve sealing efficiency, clearances between the shaft and housing should be minimized. However, care should be taken to confirm shaft/bearing rigidity and other factors to avoid direct shaft-housing contact during operation.

Oil groove clearance (reference) Shaft diameter mm

Clearance mm

Up to 50       0.2∼0.4 50 or above    0.5∼1.0 ・Oil groove width, depth (reference) width : 2∼5 mm depth : 4∼5 mm ・Three or more oil grooves should be provided. ・Sealing efficiency can be further improved by filling the oil groove portion with grease of which the consistency grade is 150 to 200. ・Grease is generally used as the lubricant for labyrinth seals, and, except in low speed applications, is commonly used together with other sealing devices.

Cautionary points regarding selection ・In order to improve sealing efficiency, labyrinth passageway clearances should be minimized. However, care should be taken to confirm shaft/bearing rigidity, fit, internal clearances and other factors to avoid direct contact between labyrinth projections during operation.

Labyrinth clearance (reference) Shaft Clearance mm diameter mm Radial direction Axial direction ー∼ 50  0.2∼0.4  50∼200  0.5∼1.0 

1.0∼2.0 3.0∼5.0

・Sealing efficiency can be further improved by filling the labyrinth passageway with grease of which the consistency grade is 150 to 200. ・Labyrinth seals are suitable for high speed applications.


●External bearing sealing devices Type

Seal construction

Name Oil comb sleeve

Oil surface

Non-contact seals

Oil comb sleeve

Oil flow

Slinger

In this design, lubricating oil that makes its way out of the housing along the shaft is thrown off by projections on the oil comb sleeve and recirculated.

Cautionary points regarding selection ・Seal type whereby a slinger that utilizes centrifugal force is provided on the rotating shaft. ・If mounted on the inside of the housing, the slinger should function to seal in lubricant by centrifugal force produced by rotation.

Slinger provided in the housing

Seal type whereby a slinger is provided in the housing that prevents lubricant from leaking by centrifugal force produced by rotation.

Slinger provided outside the housing

By mounting a slinger on the outside of the housing, centrifugal force helps to prevent dust and other solid contaminants from entering.

Z grease seal

In cross section resembling the letter "Z," this seal's empty spaces are filled with grease. The seal is commonly used with a plummer block (bearing housing).

V-ring seal

This design enhances sealing efficiency with a lip that seals from the axial direction. With the aid of centrifugal force, this seal also offers effective protection against dust, water, and other contaminants entering the bearing. Can be used for both oil and grease lubrication. At seal peripheral speeds in excess of 12 m/s, seal ring fit is lost due to centrifugal force, and a clamping band is necessary to hold it in place.

Oil seal

Oil seals are widely used, and their shapes and dimensions are standardized under JIS B 2402. In this design, a ring-shaped spring is installed in the lip section. As a result, optimal contact pressure is exerted between the lip edge and shaft surface, and sealing efficiency is good.

Slinger

Air flow

Seal characteristics and selection considerations

・If mounted on the outside of the housing, the slinger should function to seal out foreign matter by fan effect produced by rotation. ・These seal types are commonly employed together with other sealing devices.

Z grease seal

V-ring seal

Back up metal

Spring

Contact seals

Seal lip

Lip edge

When the bearing and oil seal are in close proximity, the internal clearance of the bearing may be reduced by heat produced by the oil seal. In addition to considering the heat generated by contact seals at various peripheral speeds, internal bearing clearances must also be selected with caution.

For dust proof

For preventing lubricant leakage

Depending on its orientation, the seal may function to prevent lubricant from leaking out or foreign matter from getting in.

Cautionary points regarding selection Shaft surface roughness (reference) Peripheral speed m/s  ∼ 5 5∼10 10∼

Surface roughness Ra    Rmax 0.8a    3.2s 0.4a    1.6s 0.2a    0.8s

Shaft material (reference) Material

Machine structural carbon steel, Low carbon alloy steel, Stainless steel

Surface HRC 40 or higher necessary hardness HRC 55 or higher advisable Final grinding without Processing repeat (moving), or buffed method after hard chrome plating

Allowable speed/temperature according to seal type/material (reference) Seal type/material Oil seals Z-seal V-ring

Nitrile rubber Acrylic rubber Fluorinated rubber Nitrile rubber Nitrile rubber

A-81

Allowable peripheral speed

π×d(mm)×n(r/min)

m/s(V(m/s)=―――――――――― )Allowable temp ˚C 60,000

16 or less 26 or less 32 or less 6 or less 40 or less

-25 ∼+120 -15 ∼+150 -30 ∼+200 -25 ∼+120 -25 ∼+120


â—?External bearing sealing devices Type

Seal construction

Name

Seal characteristics and selection considerations

Combination seals

Z-seal + Labyrinth seal

This is an example of an axial labyrinth seal which has been combined with a Zseal to increase its sealing efficiency. The axial labyrinth seal is affixed to the shaft with a setting bolt or other method. In the diagram on the left, both the direction of the Z-seal and the labyrinth seal are oriented to keep dust and other contaminants out of the bearing. Because a Z-seal has been incorporated, the allowable peripheral speed should not exceed 6 m/s.

Labyrinth seal + Oil groove seal + Slinger

This is an example of a combination of three different non-contact seals. It has the advantage of preventing both lubricant leakage from inside the bearing and infiltration of dust and other contaminants from the outside. It is widely used on mining equipment and as a sealing system with plummer blocks in extremely dusty application conditions.

Oil groove seal + Slinger + Z-seal

This is an example where an oil groove seal and slinger have been combined with a Z-seal to increase its sealing efficiency. In the diagram on the left, all three seals have been oriented to keep dust and other contaminants out of the bearing. The combination is widely used on mining equipment and as a sealing system with plummer blocks in extremely dusty application conditions.

A-82


●Bearing Materials 13. Bearing Materials steel which have undergone standard heat treatment are used at temperatures above 120˚C for long durations, unacceptably large dimensional changes can occur. For this reason, a dimension stabilizing treatment (TS treatment) has been devised for very high temperature applications. This treatment however reduces hardness of the material, thereby reducing rolling fatigue life. (See item 3.3.2 on page A-18.)

13.1 Raceway and rolling element materials While the contact surfaces of a bearing's raceways and rolling elements are subjected to repeated heavy stress, they still must maintain high precision and rotational accuracy. To accomplish this, the raceways and rolling elements must be made of a material that has high hardness, is resistant to rolling fatigue, is wear resistant, and has good dimensional stability. The most common cause of fatigue in bearings is the inclusion of non-metallic impurities in the steel. Nonmetallic inclusion includes hard oxides that can cause fatigue crack. Clean steel with minimal non-metallic inclusion must therefore be used.

For standard high temperature bearings used at temperatures from 150˚C – 200˚C, the addition of silicone to the steel improves heat resistance and results in a bearing with excellent rolling fatigue life with minimal dimensional change or softening at high temperatures. A variety of heat resistant steels are also incorporated in bearings to minimize softening and dimensional changes when used at high temperatures. Two of these are high speed molybdenum steel and high speed tungsten steel. For bearings requiring heat resistance in high speed applications, there is also heat resistant case hardening molybdenum steel. (refer to Table 13.3)

For all NTN bearings, steel low in oxygen content and nonmetallic impurities, then refined by a vacuum degassing process as well as outside hearth smelting, is used. For bearings requiring especially high reliability and long life, steels of even higher in purity, such as vacuum melted steel (VIM, VAR) and electro-slag melted steel (ESR), are used. 1) High/mid carbon alloy steel In general, steel varieties which can be hardened not just on the surface but also deep hardened by the so-called "through hardening method" are used for the raceways and rolling elements of bearings. Foremost among these is high carbon chromium bearing steel, which is widely used. For large type bearings and bearings with large cross sectional dimensions, induction hardened bearing steel incorporating manganese or molybdenum is used. Also in use is midcarbon chromium steel incorporating silicone and manganese, which gives it hardening properties comparable to high carbon chromium steel. Table 13.1 gives chemical composition of representative high carbon chrome bearing steel that meets JIS standards. SUJ2 is frequently used. SUJ3 with enhanced hardening characteristics containing a large quantity of Mn is used for large bearings. SUJ5 is SUJ3 to which Mo has been added to further enhance hardening characteristics, and is used for oversized bearings or bearings with thick walls. The chemical composition of SUJ2 is equivalent to AISI 52100 (US) and DIN 100Cr6 (Germany).

4) Corrosion resistant bearing steel For applications requiring high corrosion resistance, stainless steel is used. To achieve this corrosion resistance a large proportion of the alloying element chrome is added to martensite stainless steel. (Table 13.4) 5) Induction hardened steel Besides the use of surface hardening steel, induction hardening is also utilized for bearing raceway surfaces, and for this purpose mid-carbon steel is used for its lower carbon content instead of through hardened steel. For induction hardening of the deep layers required for larger bearings and bearings with large surface dimensions, mid-carbon steel is fortified with chrome and molybdenum. 6) Other bearing materials For ultra high speed applications and applications requiring very high level corrosion resistance, ceramic bearing materials such as Si3N4 are also available.

13.2 Cage materials 2) Case hardened (carburizing) steel Carburizing hardens the steel from the surface to the proper depth, forming a relatively soft core. This provides hardness and toughness, making the material suitable for impact loads. NTN uses case hardened steel for almost all of its tapered roller bearings. In terms of case hardened steel for NTN's other bearings, chromium steel and chrome molybdenum steel are used for small to medium sized bearings, and nickel chrome molybdenum steel is used for large sized bearings. Table 13.2 gives the chemical composition of representative JIS case hardened steel.

Bearing cage materials must have the strength to withstand rotational vibrations and shock loads. These materials must also have a low friction coefficient, be light weight, and be able to withstand bearing operation temperatures. For small and medium sized bearings, pressed cages of cold or hot rolled steel with a low carbon content of approx. 0.1% are used. However, depending on the application, austenitic stainless steel is also used. Machined cages are generally used for large bearings. Carbon steel for machine structures or high-strength cast brass is frequently used for the cages, but other materials such as aluminum alloy are also used.

3) Heat resistant bearing steel When bearings made of ordinary high carbon chromium

A-83


●Bearing Materials

Tables 13.5 and 13.6 give the chemical composition for these representative cage materials.

also widely used for cages. Polyamide resin reinforced with glass fibers is generally used. Cages made of high-polymer materials are lightweight and corrosion resistant. They also have superior damping and characteristics and lubrication performance. Heat resistant polyimide resins now enable the production of cages that perform well in applications ranging between -40˚C – 120˚C. However, they are not recommended for use at temperatures exceeding 120˚C.

Besides high-strength brass, medium carbon nickel, chrome and molybdenum that has been hardened and tempered at high temperatures are also used for bearings used in aircraft. The materials are often plated with silver to enhance lubrication characteristics. High polymer materials that can be injection molded are

Table 13.1 Chemical composition of representative high carbon chrome bearing steels Standard

JIS G 4805 ASTM A295 ASTM A485

Symbol SUJ2 SUJ3 SUJ5 52100 Grade 1 Grade 3

C 0.95∼1.10 0.95∼1.10 0.95∼1.10 0.98∼1.10 0.90∼1.05 0.95∼1.10

Chemical composition (%) Mn P S Max. 0.50 Max. 0.025 Max. 0.025 0.90∼1.15 Max. 0.025 Max. 0.025 0.90∼1.15 Max. 0.025 Max. 0.025 0.25∼0.45 Max. 0.025 Max. 0.025 0.95∼1.25 Max. 0.025 Max. 0.025 0.65∼0.90 Max. 0.025 Max. 0.025

Si 0.15∼0.35 0.40∼0.70 0.40∼0.70 0.15∼0.35 0.45∼0.75 0.15∼0.35

Remarks

Cr 1.30∼1.60 0.90∼1.20 0.90∼1.20 1.30∼1.60 0.90∼1.20 1.10∼1.50

Mo Max. 0.08 Max. 0.08 0.10∼0.25 Max. 0.10 Max. 0.10 0.20∼0.30

SUJ2 equivalent SUJ3 equivalent SUJ5 equivalent

Ni ― ― 0.40∼0.70 1.60∼2.00 4.00∼4.50 ― ― 0.40∼0.70 1.65∼2.00 3.00∼3.50

Cr 0.90∼1.20 0.90∼1.20 0.40∼0.65 0.40∼0.65 0.70∼1.00 0.70∼0.90 0.40∼0.60 0.40∼0.60 0.40∼0.60 1.00∼1.40

Mo ― 0.15∼0.30 0.15∼0.30 0.15∼0.30 0.15∼0.30 ― 0.08∼0.15 0.15∼0.25 0.20∼0.30 0.08∼0.15

Table 13.2 Chemical composition of representative case hardened steel (carburizing steel) Standard JIS G 4104 JIS G 4105 JIS G 4103

ASTM A534

Symbol SCr420 SCM420 SNCM220 SNCM420 SNCM815 5120 4118 8620 4320 9310

C 0.18∼0.23 0.18∼0.23 0.17∼0.23 0.17∼0.23 0.12∼0.18 0.17∼0.22 0.18∼0.23 0.18∼0.23 0.17∼0.22 0.08∼0.13

Si 0.15∼0.35 0.15∼0.35 0.15∼0.35 0.15∼0.35 0.15∼0.35 0.15∼0.35 0.15∼0.35 0.15∼0.35 0.15∼0.35 0.15∼0.35

Chemical composition (%) P S Max. 0.030 Max. 0.030 Max. 0.030 Max. 0.030 Max. 0.030 Max. 0.030 Max. 0.030 Max. 0.030 Max. 0.030 Max. 0.030 Max. 0.030 Max. 0.040 Max. 0.030 Max. 0.040 Max. 0.030 Max. 0.040 Max. 0.030 Max. 0.040 Max. 0.025 Max. 0.025

Mn 0.60∼0.85 0.60∼0.85 0.60∼0.90 0.40∼0.70 0.30∼0.60 0.70∼0.90 0.70∼0.90 0.70∼0.90 0.45∼0.65 0.45∼0.65

Table 13.3 Chemical composition of high-speed steel Standard

AMS

6491 (M50) 5626 2315 (M50NiL)

Chemical composition (%) C Si Mn P S Cr Mo V Ni Cu 0.77∼0.85 Max. 0.25 Max. 0.35 Max. 0.015 Max. 0.015 3.75∼4.25 4.00∼4.50 0.90∼1.10 Max. 0.15 Max. 0.10 0.65∼0.80 0.20∼0.40 0.20∼0.40 Max. 0.030 Max. 0.030 3.75∼4.50 Max. 1.00 0.90∼1.30 ― ― 0.11∼0.15 0.10∼0.25 0.15∼035 Max. 0.015 Max. 0.010 4.00∼4.25 4.00∼4.50 1.13∼1.33 3.20∼3.60 Max. 0.10

Co W Max. 0.25 Max. 0.25 17.25∼18.25 ― Max. 0.25 Max. 0.25

Table 13.4 Chemical composition of stainless steel Standard JIS G 4303 AISI

Symbol

C 0.95∼1.20 0.95∼1.20

SUS440C 440C

Si Max. 1.00 Max. 1.00

Chemical composition (%) Mn P Max. 1.00 Max. 0.040 Max. 1.00 Max. 0.040

S Max. 0.030 Max. 0.030

Cr 16.00∼18.00 16.00∼18.00

Mo Max. 0.75 Max. 0.75

Table 13.5 Chemical composition of steel plate for pressed cages and carbon steel for machined cages

Pressed retainer Machined retainer

Standard

Symbol

JIS G 3141 JIS G 3131 BAS 361 JIS G 4305 JIS G 4051

SPCC SPHC SPB2 SUS304 S25C

C ― ― 0.13∼0.20 Max. 0.08 0.22∼0.28

Si ― ― Max. 0.04 Max. 1.00 0.15∼0.35

Chemical composition (%) Mn P ― ― ― Max. 0.050 0.25∼0.60 Max. 0.030 Max. 2.00 Max. 0.045 0.30∼0.60 Max. 0.030

S ― Max. 0.050 Max. 0.030 Max. 0.030 Max. 0.035

Ni Cr ― ― ― ― ― ― 8.00∼10.50 18.00∼20.00 ― ―

Table 13.6 Chemical composition of high-strength cast brass for machined cages Standard JIS H 5120

Symbol CAC301

Cu Zn 55.0∼60.0 33.0∼42.0

Chemical composition (%) Mn Fe Al 0.1∼1.5 0.5∼1.5 0.5∼1.5

A-84

Sn Max. 1.0

Ni Max. 1.0

Impurities Pb Si Max. 0.4 Max. 0.1


â—?Shaft and Housing Design 14. Shaft and Housing Design 14.1 Fixing of bearings

Depending upon the design of a shaft or housing, the shaft may be influenced by an unbalanced load or other factors which can then cause large fluctuations in bearing efficiency. For this reason, it is necessary to pay attention to the following when designing shaft and housing:

When fixing a bearing in position on a shaft or housing, there are many instances where the interference fit alone is not enough to hold the bearing in place. Bearings must be fixed in place by various methods so that they do not move axially when placed under load. Moreover, even bearings which are not subjected to axial loads (such as cylindrical roller bearings, etc.), must be fixed in place axially because of the potential for ring displacement due to shaft deflection by moment load which may cause damage. Table 14.1 shows general bearing fixing methods, and Table 14.2 shows fixing methods for bearings with tapered bores.

1) Bearing arrangement selection; most effective fixing method for bearing arrangement 2) Selection of shoulder height and fillet radius of housing and shaft. 3) Shape precision and dimensions of fitting; area runout tolerance of shoulder. 4) Machining precision and mounting error of housing and shaft suitable for allowable alignment angle and inclination of bearing.

Table 14.1 General bearing fixing methods Inner ring clamp

Outer ring clamp

Snap ring

The most common method of fixing bearings in place is to use clamping nuts or bolts to hold the bearing or housing abutment against the ring end face.

Use of snap rings regulated under JIS B 2804, B 2805, and B 2806, makes construction very simple. However, interference with chamfers, bearing installation dimensions, and other related specifications must be considered carefully. Snap rings are not suitable for applications requiring high accuracy and where the snap ring receives large axial loads.

Table 14.2 Fixing methods for bearings with tapered bores Adapter sleeve mounting

Withdrawal sleeve mounting

When installing bearings on cylindrical shafts, adapter sleeves or withdrawal sleeves can be used to fix bearings in place axially.

Split ring mounting

For installation of tapered bore bearings directly on tapered shafts, the bearing is held in place by a split ring inserted into a groove on the shaft, and is fixed in place by a split ring nut or screw.

The adapter sleeve is fastened in place by frictional force between the shaft and inner diameter of the sleeve.

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●Shaft and Housing Design

14.2.2 For spacer and ground undercut In cases where a fillet radius (ra max) larger than the bearing chamfer dimension is required to strengthen the shaft or to relieve stress concentration (Fig. 14.1a), or where the shaft abutment height is too low to afford adequate contact surface with the bearing (Fig. 14.1b), spacers may be used effectively.

14.2 Bearing fitting dimensions 14.2.1 Abutment height and fillet radius The shaft and housing abutment height (h) should be larger than the bearings' maximum allowable chamfer dimensions (rs max), and the abutment should be designed so that it directly contacts the flat part of the bearing end face. The fillet radius (ra) must be smaller than the bearing's minimum allowable chamfer dimension (rs min) so that it does not interfere with bearing seating. Table 14.3 lists abutment height (h) and fillet radius (ra). For bearings to be applied to very large axial loads as well, shaft abutments (h) should be higher than the values in the table.

rs min

ra

Relief dimensions for ground shaft and housing fitting surfaces are given in Table 14.4.

h

ra max

rs min h

ra

rs min

rs min

rs min rs min

(a)

(b)

Fig. 14.1 Bearing mounting with spacer

Table 14.3 Fillet radius and abutment height rs min

ras max

0.05 0.08 0.1 0.15 0.2 0.3 0.6 1 1.1 1.5 2 2.1 2.5 3 4 5 6 7.5 9.5 12 15 19

0.05 0.08 0.1 0.15 0.2 0.3 0.6 1 1 1.5 2 2 2 2.5 3 4 5 6 8 10 12 15

Unit mm h (min)

Normal use1

Special use2 0.3 0.3 0.4 0.6 0.8

1.25 2.25 2.75 3.5 4.25 5 6 6 7 9 11 14 18 22 27 32 42

b rs min t rc 1 2 2.5 3.25 4 4.5 5.5 5.5 6.5 8 10 12 16 20 24 29 38

rc t

rs min b

Table 14.4 Relief dimensions for ground shaft Unit mm

rs min 1 1.1 1.5 2 2.1 2.5 3 4 5 6 7.5

1 If bearing supports large axial load, the height of the shoulder must exceed the value given here. 2 Used when axial load is light. These values are not suitable for tapered roller bearings, angular ball bearings and spherical roller bearings. Note: ras max maximum allowable fillet radius.

A-86

Relief dimensions b t rc 2 2.4 3.2 4 4 4 4.7 5.9 7.4 8.6 10

0.2 0.3 0.4 0.5 0.5 0.5 0.5 0.5 0.6 0.6 0.6

1.3 1.5 2 2.5 2.5 2.5 3 4 5 6 7


●Shaft and Housing Design

14.2.3 Thrust bearings and fitting dimensions For thrust bearings, it is necessary to make the raceway washer back face sufficiently broad in relation to load and rigidity, and fitting dimensions from the dimension tables should be adopted. (Figs. 14.2 and 14.3) For this reason, shaft and abutment heights will be larger than for radial bearings. (Refer to dimension tables for all thrust bearing fitting dimensions.)

14.4 Allowable bearing misalignment A certain amount of misalignment of a bearing's inner and outer rings occurs as a result of shaft flexure, shaft or housing finishing irregularities, and minor installation error. In situations where the degree of misalignment is liable to be relatively large, self-aligning ball bearings, spherical roller bearings, bearing units and other bearings with aligning properties are advisable. Although allowable misalignment will vary according to bearing type, load conditions, internal clearances, etc., Table 14.6 lists some general misalignment standards for normal applications. In order to avoid shorter bearing life and cage failure, it is necessary to maintain levels of misalignment below these standard levels. Table 14.6 Bearing type and allowable misalignment/alignment allowance Allowable misalignment

Fig. 14.2

Deep groove ball bearings Angular contact ball bearings Single row Multi row back to back arrangement Face to face arrangement Cylindrical roller bearings Bearing series 2, 3, 4 Bearing series 22, 23, 49, 30

Fig. 14.3

14.3 Shaft and housing accuracy Table 14.5 shows the accuracies for shaft and housing fitting surface dimensions and configurations, as well as fitting surface roughness and abutment squareness for normal operating conditions.

Tapered roller bearings Single row/back to back arrangement Face-to-face arrangement Needle roller bearings Thrust bearings excluding self-aligning roller thrust bearings

Table 14.5 Shaft and housing accuracy Characteristics Dimensional accuracy Roundness (max.) Cylindricity

Shaft

Housing

IT6 (IT5)

IT7 (IT5)

IT3

IT4

1/1,000∼1/300 1/1,000 1/10,000 1/10,000 1/1,000 1/1,000 1/2,000 1/2,000 1/1,000 1/2,000 1/10,000

Alignment allowance

Abutment squareness

IT3

IT3

Fitting Small size bearings surface roughness Mid-large size bearings

0.8a

1.6a

1.6a

3.2a

Note: For precision bearings (P4, P5 accuracy), it is necessary to increase the circularity and cylindricity accuracies in this table by approximately 50%. For more specific information, please consult the NTN precision rolling bearing catalog.

A-87

Self-aligning ball bearings Spherical roller bearings

1/20∼1/15 1/50∼1/30

Self-aligning roller thrust bearings Ball bearing units Without cover With cover

1/30 1/30 1/50


â—?Bearing Handling 15. Bearing Handling Bearings are precision parts and, in order to preserve their accuracy and reliability, care must be exercised in their handling. In particular, bearing cleanliness must be maintained, sharp impacts avoided, and rust prevented.

15.2.1 Installation preparations Bearings should be fitted in a clean, dry work area. Especially for small and miniature bearings, a "clean room" should be provided as any contamination particles in the bearing will greatly affect bearing efficiency. All dirt, burrs or metal filings must be removed from the shaft, housing and tools used for mounting the bearings. Shaft and housing fitting surfaces should also be checked for roughness, dimensional and design accuracy, and to ensure that they are within allowable tolerance limits. Bearings should not be unwrapped until just prior to installation. Normally, bearings to be used with grease lubricant can be installed as is, without removing the rust prevent oil. However, for bearings which will use oil lubricant, or in cases where mixing the grease and rust prevent oil would result in loss of lubrication efficiency, the rust prevent oil should be removed by washing with benzene or petroleum solvent and dried before installation. Bearings should also be washed and dried before installation if the package has been damaged or there are other chances that the bearings have been contaminated. Double shielded bearings and sealed bearings should never be washed.

15.1 Bearing storage Most rolling bearings are coated with a rust prevent oil before being packed and shipped, and they should be stored at room temperature with a relative humidity of less than 60%.

15.2 Installation

When bearings are being installed on shafts or in housings, the bearing rings should never be struck directly with a hammer or a drift, as shown in Fig. 15.1, because damage to the bearing may result. Any force applied to the bearing should always be evenly distributed over the entire bearing ring face. Also, when fitting both rings simultaneously, applying pressure to one ring only, as shown in Fig. 15.2, should be avoided because indentations in the raceway surface may be caused by the rolling elements, or other internal damage may result.

15.2.2 Installing cylindrical bore bearings For bearings with relatively small interference, the entire circumference of the raceway can be uniformly press-fit at room temperature as shown in Fig. 15.3. Usually, bearings are installed by striking the sleeve with a hammer; however, when installing a large number of bearings, a mechanical or hydraulic press should be used. When installing non-separable bearings on a shaft and in a housing simultaneously, a pad which distributes the fitting pressure evenly over the inner and outer rings is used as shown in Fig. 15.4. If the fitting is too tight or bearing size is large, a considerable amount of force is required to install the bearing at room temperature. Installation can be facilitated by heating and expanding the inner ring beforehand. The required relative temperature difference between the inner ring and the shaft depends on the amount of interference and the shaft fitting surface diameter. FIg. 15.5 shows the relation between the bearing inner bore diameter temperature differential and the amount of thermal expansion. In any

Fig. 15.1

Pressure distribution pad

Fig. 15.3 Fitting sleeve pressure against inner ring

Fig. 15.2

A-88

Fig. 15.4 Fitting sleeve pressure against inner /outer ring simultaneously


●Bearing Handling

220

50 ℃

260 240

40 ℃

Diametric expansion of inner ring bore μm

240

60

260

280 8 0℃ 70 ℃

Ris diff e in te bef erence mp. hea ore/af bea ting ter ring 90℃

280

200 r6

inner ring

220 30

180

200 180

160

160

140

p6

140

120

n6

120

100

m6

100

80

Removal pawl Fig. 15.6 Removal of inner ring using an induction heater

80

60

k5

60

40

j5

40

20

20

50

100 150 200 250 300 350 400 450

500 550 600

Bearing bore diameter mm

Fig. 15.5 Temperature required for heat-fitting inner ring

event, bearings should never be heated above 120˚C. The most commonly used method of heating bearings is to immerse them in hot oil. This method must not be used for sealed bearings or shield bearings with grease sealed inside. To avoid overheating parts of the bearings they should never be brought into direct contact with the heat source, but instead should be suspended inside the heating tank or placed on a wire grid. If heating the bearing with air in a device such as a thermostatic chamber, the bearing can be handled while dry. For heating the inner rings of NU, NJ or NUP cylindrical and similar type bearings without any ribs or with only a single rib, an induction heater can be used to quickly heat bearings in a dry state (must demagnetize). When heated bearings are installed on shafts, the inner rings must be held against the shaft abutment until the bearing has been cooled in order to prevent clearance between the ring and the abutment face. As shown in Fig. 15.6, a removal pawl, or tool, can also be used to dismount the inner ring when using the induction heating method described above.

a) Installation on tapered bore b) Installation with adapter sleeve

c) Installation using withdrawal sleeve Fig. 15.7 Installation methods using locknuts

15.2.3 Installation of tapered bore bearings Small type bearings with tapered bores are installed over a tapered shaft, withdrawal sleeves, or adapter sleeves by driving the bearing into place using a locknut. The locknut is tightened using a hammer or impact wrench. (Fig. 15.7) Large size bearings require considerable fitting force and must be installed hydraulically. In Fig. 15.8 the fitting surface friction and nut tightening torque needed to install bearings with tapered bores directly onto tapered shafts are decreased by injecting

Fig. 15.8 Installation utilizing oil injection

A-89


â—?Bearing Handling

Fig. 15.10 Installation using hydraulic withdrawal sleeve a) Installation on tapered shaft

b) Installation with adapter sleeve

Thickness gauge

c) Installation with withdrawal sleeve Fig. 15.11 Internal clearance measurement method for spherical roller bearings

Fig. 15.9 Installation using hydraulic nut

high pressure oil between the fitting surfaces. Fig. 15.9 a) shows one method of installation where a hydraulic nut is used to drive the bearing onto a tapered shaft. Fig. 15.9 b) and c) show installation using a hydraulic nut with adapter sleeves and withdrawal sleeves. Fig. 15.10 shows an installation method using a hydraulic withdrawal sleeve. With tapered bore bearings, as the inner ring is driven axially onto the shaft or adapter or withdrawal sleeve, the interference will increase and the bearing internal radial clearance will decrease. Interference can be estimated by measuring decrease in internal radial clearance. As shown in Fig. 15.11, the internal radial clearance between the rollers and outer ring of spherical roller bearings should be measured with a thickness gauge under no load while the rollers are held in the correct position. Instead of using the decrease in amount of internal radial clearance to estimate the interference, it is possible to estimate by measuring the distance the bearing has been driven onto the shaft. For spherical roller bearings, Table 15.1 indicates the appropriate interference which will be achieved as a result of the internal radial clearance decrease, or the distance the bearing has been driven onto the shaft. For conditions such as heavy loads, high speeds, or when there is a large temperature differential between the inner and outer rings, etc. which require large interference fits, bearings which have a minimum internal radial clearance of C3 or greater should be used. Table 15.1 lists the maximum values for internal radial clearance

decrease and axial displacement. For these applications, the remaining clearance must be greater than the minimum allowable residual clearance listed in Table 15.1. 15.2.4 Installation of outer ring Even for tight interference fits, the outer rings of small type bearings can be installed by driving them into housings at room temperature. For large interference type bearings, the housing can be heated before installing the bearing, or the bearing's outer ring can be cooled with dry ice, etc. before installing. If dry ice or other cooling agent is used, atmospheric moisture will condense on bearing surfaces, and therefore appropriate rust preventative measures are necessary.

15.3 Internal clearance adjustment As shown in Fig. 15.12, for angular contact ball bearings and tapered roller bearings the desired amount of axial internal clearance can be set at the time of installation by tightening or loosening the adjustment nut. To adjust the suitable axial internal clearance or amount of bearing preload, the internal clearance can be measured while tightening the adjusting nut as shown in Fig. 15.13. Other methods are to check rotation torque by rotating the shaft or housing while adjusting the nut, or to insert shims of the proper thickness as shown in Fig. 15.14.

A-90


●Bearing Handling

Table 15.1 Installation of tapered bore spherical roller bearings Nominal bearing bore diameter d over incl.

Reduction of radial internal clearance

Units mm

Minimum allowable residual clearance

Axial displacement drive up Taper, 1:12

Taper, 1:30

Min

Max

Min

Max

Min

Max

CN

C3

C4

30 40 50

40 50 65

0.02 0.025 0.03

0.025 0.03 0.035

0.35 0.4 0.45

0.4 0.45 0.6

ー ー ー

ー ー ー

0.015 0.02 0.025

0.025 0.03 0.035

0.04 0.05 0.055

65 80 100

80 100 120

0.04 0.045 0.05

0.045 0.055 0.06

0.6 0.7 0.75

0.7 0.8 0.9

ー 1.75 1.9

ー 2.25 2.25

0.025 0.035 0.05

0.04 0.05 0.065

0.07 0.08 0.1

120 140 160

140 160 180

0.065 0.075 0.08

0.075 0.09 0.1

1.1 1.2 1.3

1.2 1.4 1.6

2.75 3 3.25

3 3.75 4

0.055 0.055 0.06

0.08 0.09 0.1

0.11 0.13 0.15

180 200 225

200 225 250

0.09 0.1 0.11

0.11 0.12 0.13

1.4 1.6 1.7

1.7 1.9 2

3.5 4 4.25

4.25 4.75 5

0.07 0.08 0.09

0.1 0.12 0.13

0.16 0.18 0.2

250 280 315

280 315 355

0.12 0.13 0.15

0.15 0.16 0.18

1.9 2 2.4

2.4 2.5 2.8

4.75 5 6

6 6.25 7

0.1 0.11 0.12

0.14 0.15 0.17

0.22 0.24 0.26

355 400 450

400 450 500

0.17 0.2 0.21

0.21 0.24 0.26

2.6 3.1 3.3

3.3 3.7 4

6.5 7.75 8.25

8.25 9.25 10

0.13 0.13 0.16

0.19 0.2 0.23

0.29 0.31 0.35

500 560 630

560 630 710

0.24 0.26 0.3

0.3 0.33 0.37

3.7 4 4.6

4.6 5.1 5.7

9.25 10 11.5

11.5 12.5 14.5

0.17 0.2 0.21

0.25 0.29 0.31

0.36 0.41 0.45

710 800 900

800 900 1,000

0.34 0.37 0.41

0.43 0.47 0.53

5.3 5.7 6.3

6.7 7.3 8.2

13.3 14.3 15.8

16.5 18.5 20.5

0.23 0.27 0.3

0.35 0.39 0.43

0.51 0.57 0.64

1,000 1,120

1,120 1,250

0.45 0.49

0.58 0.63

6.8 7.4

8.7 9.4

17 18.5

22.5 24.5

0.32 0.34

0.48 0.54

0.7 0.77

Fig. 15.12 Axial internal clearance adjustment

Shim

Fig. 15.13 Measurement of axial internal clearance adjustment

Fig. 15.14 Internal clearance adjustment using shims

A-91


â—?Bearing Handling

15.4 Post installation running test To insure that the bearing has been properly installed, a running test is performed after installation is completed. The shaft or housing is first rotated by hand and if no problems are observed low speed, no load power test is performed. If no abnormalities are observed, the load and speed are gradually increased to operating conditions. During the test if any unusual noise, vibration, or temperature rise is observed the test should be stopped and examine the equipment. If necessary, the bearing should be disassembled for inspection. To check bearing running noise, the sound can be amplified and the type of noise ascertained with a listening instrument placed against the housing. A clear, smooth and continuous running sound is normal. A high, metallic or irregular sound indicates some error in function. Vibration can be accurately checked with a vibration measuring instrument, and the amplitude and frequency characteristics measured guantitatively. Usually the bearing temperature can be estimated from the housing surface temperature. However, if the bearing outer ring is accessible through oil inlets, etc., the temperature can be more accurately measured. Under normal conditions, bearing temperature rises with operation time and then reaches a stable operating temperature after a certain period of time. If the temperature does not stable and continues to rise, or if there is a sudden temperature rise, or if the temperature is extremely high, the bearing should be inspected.

a

b

Fig. 15.15 Puller disassembly

Fig. 15.16 Press disassembly

15.5 Bearing disassembly Bearings are often removed as part of periodic inspection procedures or during the replacement of other parts. However, the shaft and housing are almost always reinstalled, and in more than a few cases the bearings themselves are reused. These bearings, shafts, housings, and other related parts must be designed to prevent damage during disassembly procedures, and the proper disassembly tools must be employed. When removing raceways with interference, pulling force should be applied to the raceway only. Do not remove the raceway through the rolling elements.

Groove

Groove

15.5.1 Disassembly of bearings with cylindrical bores For small type bearings, the pullers shown in Fig. 15.15 a) and b) or the press method shown in Fig. 15.16 can be used for disassembly. When used properly, these methods can improve disassembly efficiency and prevent damage to bearings. To facilitate disassembly procedures, attention should be given to planning the designs of shafts and housings, such as providing extraction grooves on the shaft and housing for puller claws as shown Figs. 15.17 and 15.18. Threaded bolt holes should also be provided in housings to facilitate the pressing out of outer rings as shown in Fig. 15.19.

Fig. 15.17 Extracting grooves

Groove

Fig. 15.18 Extraction groove for outer ring disassembly

A-92


â—?Bearing Handling

15.5.2 Disassembly of bearings with tapered bores Small bearings installed using an adapter are removed by loosening the locknut, placing a block on the edge of the inner ring as shown in Fig. 15.21, and tapping with a hammer. Bearings which have been installed with withdrawal sleeves can be disassembled by tightening down the lock nut as shown in Fig. 15.22. For large type bearings on tapered shafts, adapters, or withdrawal sleeves, disassembly is greatly facilitated by hydraulic methods. Fig. 15.23 shows the case where the bearing is removed by applying hydraulic pressure on the fitting surface of a bearing installed on a tapered shaft.

Large bearings, installed with tight fits, and having been in service for a long period of time, will likely have developed fretting corrosion on fitting surfaces and will require considerable dismounting force. In such instances, dismounting friction can be reduced by injecting oil under high pressure between the shaft and inner ring surfaces as shown in Fig. 15.20. For NU, NJ and NUP type cylindrical roller bearings, the induction heating unit shown in Fig. 15.6 can be used to facilitate removal of the inner ring by means of thermal expansion. This method is highly efficient for frequent disassembly of bearings with identical dimensions.

Reinforcing plate

Fig. 15.19 Outer ring disassembly bolt

Fig. 15.21 Disassembly of bearing with adapter

Hydraulic pressure

Hydraulic pressure

Fig. 15.20 Removal by hydraulic pressure

Fig. 15.22 Disassembly of bearing with withdrawal sleeve

Reinforcing plate

Fig. 15.23 Removal of bearing by hydraulic pressure

A-93


â—?Bearing Handling

Fig. 15.24 shows two methods of disassembling bearings with adapters or withdrawal sleeves using a hydraulic nut. Fig. 15.25 shows a disassembly method using a hydraulic withdrawal sleeve where high pressure oil is injected between fitting surfaces and a nut is then employed to remove the sleeve.

15.6 Bearing maintenance and inspection In order to get the use the bearing to its full potential and keep it in good working condition as long as possible, maintenance and inspections should be performed. Doing so will enable early detection of any problems with the bearing. This will enable you to prevent bearing failure before it happens, and will enhance productivity and cost performance. The following measures are often taken as a general method of maintaining and managing bearings. Maintenance management requires inspection items and frequency for performing routine inspections be determined according to the importance of the device or machine. 15.6.1 Inspection of machine while running The interval for replenishing and replacing lubricant is determined by a study of lubricant nature and checking the bearing temperature, noise and vibration.

a) Disassembly of adapter sleeve

15.6.2 Observation of bearing after use Take note of any problem that may appear after the bearing is used or when performing routine inspections, and take measures for preventing reoccurrence of any damage discovered. For types of bearing damage and countermeasures for preventing damage, see section 16. b) Disassembly of withdrawal sleeve Fig. 15.24 Disassembly using hydraulic nut

Fig. 15.25 Disassembly using hydraulic withdrawal sleeve

A-94


A-95


●Bearing Damage and Corrective Measures 16. Bearing Damage and Corrective Measures conditions and surrounding structure. By investigating several possible causes surmised from the type of damage and condition at the time the damage occurred, it is possible to prevent the same kind of damage from reoccurring. Table 16.1 gives the main causes of bearing damage and remedies for correcting the problem.

If handled correctly, bearings can generally be used for a long time before reaching their fatigue life. If damage occurs prematurely, the problem could stem from improper bearing selection, handling or lubrication. In this occurs, take note of the type of machine on which the bearings is used, the place where it is mounted, service

Table 16.1 Bearing damage, main causes of bearing damage and remedies for correcting the problem Description

¡Riview lubricant type and quantity. ¡Check for proper clearance. (Increase clearances.) ¡Take steps to prevent misalignment. ¡Review application conditions. ¡Improve assembly method and handling.

Causes

¡Excessive shock loads. ¡Improper handling (use of steel hammer, cutting by large particles of foreign matter) ¡Formation of decomposed surface layer due to improper lubrication ¡Excessive interference. ¡Large flaking. ¡Friction cracking. ¡Imprecision of mounting mate (oversized fillet radius)

Correction

A-96

¡Insufficient clearance (including clearances made smaller by local deformation). ¡Insufficient lubrication or improper lubricant. ¡Excessive loads (excessive preload). ¡Skewed rollers. ¡Reduction in hardness due to abnormal temperature rise

Correction

Localized flaking occurs. Little cracks or notches appear.

¡Select a different type of bearing. ¡Reevaluate the clearance. ¡Improve the precision of the shaft and housing. ¡Review application conditions. ¡Improve assembly method and handling. ¡Reevaluate the layout (design) of the area around the bearing. ¡Review lubricant type and lubrication methods.

Causes

Cracking and notching

The bearing heats up and becomes discolored. Eventually the bearing will seize up.

¡Excessive load, fatigue life, improper handling ¡Improper mounting. ¡Improper precision in the shaft or housing. ¡Insufficient clearance. ¡Contamination. ¡Rust. ¡Improper lubrication ¡Drop in hardness due to abnormally high temperatures.

Correction

Seizure

Surface of the raceway and rolling elements peels away in flakes Conspicuous hills and valleys form soon afterward.

Causes

Flaking

¡Review lubricant (friction crack prevention). ¡Select proper interference and review materials. ¡Review service conditions. ¡Improve assembly procedures and take more care in handling.


●Bearing Damage and Corrective Measures

Table 16.1 Bearing damage, main causes of bearing damage and remedies for correcting the problem Description

¡Shaft or housing of insufficient accuracy. ¡Improper installation. ¡Insufficient shaft or housing rigidity. ¡Shaft whirling caused by excessive internal bearing clearances.

Correction

¡Reinspect bearing’s internal clearances. ¡Review accuracy of shaft and housing finish. ¡Review rigidity of shaft and housing.

Causes

¡Inadequate lubrication. ¡Entrapped foreign particles. ¡Roller skewing due to a misaligned bearing. ¡Bare spots in the collar oil film due to large axial loading. ¡Surface roughness. ¡Excessive slippage of the rolling elements.

Correction

¡Reevaluation of the lubricant type and lubrication method. ¡Bolster sealing performance. ¡Review preload. ¡Review service conditions. ¡Improve assembly method and handling

Causes

¡Poor storage conditions. ¡Poor packaging. ¡Insufficient rust inhibitor. ¡Penetration by water, acid, etc. ¡Handling with bare hands.

Correction

Rust and corrosion

¡Reevaluation of lubrication conditions. ¡Review of cage type selection. ¡Investigate shaft and housing rigidity. ¡Review service conditions. ¡Improve assembly method and handling.

Causes

Smearing and scuffing

¡Excessive moment loading. ¡High speed or excessive speed fluctuations. ¡Inadequate lubrication. ¡Impact with foreign objects. ¡Excessive vibration. ¡Improper mounting. (Mounted misaligned)

Correction

Rolling path skewing

Causes

Cage damage

¡Take measures to prevent rusting while in storage. ¡Periodically inspect the lubricating oil. ¡Improve sealing performance. ¡Improve assembly method and handling.

Rivets break or become loose resulting in cage damage.

Abrasion or an irregular, rolling path skewing left by rolling elements along raceway surfaces.

The surface becomes rough and some small deposits form. Scuffing generally refers to roughness on the race collar and the ends of the rollers.

The surface becomes either partially or fully rusted, and occasionally rust even occurs along the rolling element pitch lines.

A-97


●Bearing Damage and Corrective Measures

Table 16.1 Bearing damage, main causes of bearing damage and remedies for correcting the problem Description

¡Electric current flowing through the rollers.

Correction

¡Create a bypass circuit for the current. ¡Insulate the bearing.

Causes

¡Entrapment of foreign objects. ¡Bite-in on the flaked-off side. ¡Dropping or other mechanical shocks due to careless handling. ¡Assembled misaligned.

Correction

A-98

¡Review lubricant type and lubrication methods. ¡Improve sealing performance. ¡Take steps to prevent misalignment.

Causes

Scoring during assembly, gouges due to hard foreign objects, and surface denting due to mechanical shock.

¡Entrapment of foreign particles in the lubricant. ¡Inadequate lubrication. ¡Skewed rollers.

Correction

Dents and scratches

Pits form on the raceway. The pits gradually grow into ripples.

¡Select a different kind of bearing. ¡Select a different type of lubricant. ¡Review the interference and apply a coat of lubricant to fitting surface. ¡Pack the inner and outer rings separately for transport.

Causes

Electrolytic corrosion

The surfaces wear and dimensional deformation results. Wear is often accompanied by roughness and scratches.

¡Insufficient interference. ¡Small bearing oscillation angle. ¡Insufficient lubrication.(unlubricated) ¡Fluctuating loads. ¡Vibration during transport, vibration while stopped.

Correction

Wear

There are two types of fretting. In one, a rusty wear powder forms on the mating surfaces. In the other, brinelling indentations form on the raceway at the rolling element pitch.

Causes

Fretting

¡Improve handling and assembly methods. ¡Bolster sealing performance. (measures for preventing foreign matter from getting in) ¡Check area surrounding bearing. (when caused by metal fragments)


●Bearing Damage and Corrective Measures

Table 16.1 Bearing damage, main causes of bearing damage and remedies for correcting the problem Description

¡Reevaluation of lubricant type and lubrication method. ¡Review sealing mechanisms. ¡Examine lubrication oil purity. (filter may be excessively dirty, etc.)

Causes

¡Infiltration of bearing by foreign matter. ¡Insufficient lubrication.

Correction

A-99

¡Infiltration of bearing by foreign matter. ¡Insufficient lubrication.

Correction

Patches of minute flaking or peeling (size, approx. 10μm). Innumerable hair-line cracks visible though not yet peeling. (This type of damage frequently seen on roller bearings.)

¡Reevaluate the interference. ¡Reevaluate usage conditions. ¡Review the precision of the shaft and housing. ¡Raceway end panel scuffing

Causes

Peeling

Luster of raceway surfaces is gone; surface is matted, rough, and / or evenly dimpled. Surface covered with minute dents.

¡Insufficient interference in the mating section. ¡Sleeve not fastened down properly. ¡Abnormal temperature rise. ¡Excessive loads.

Correction

Speckles and discoloration

Surface becomes mirrored by sliding of inside and outside diameter surfaces. May by accompanied by discoloration or score.

Causes

Creeping

¡Reevaluation of lubricant type and lubrication method. ¡Improve sealing performance. (to prevent infiltration of foreign matter) ¡Take care to operate smoothly.


â—?Technical Data 17. Technical data

0.50

0.50

0.40

0.40 Axial internal clearance mm

Axial internal clearance mm

17.1 Deep groove ball bearing radial internal clearances and axial internal clearances

0.30 0.20 30 68 20 68 15 05 68 10 68 68 00 68

0.10 0.08 0.06 0.05 0.003

0.005

0.01

0.02

0.03

0.30

0.10 0.08 0.06 0.05 0.003

0.05

0.50

0.50

0.40

0.40

0.30

30 69 0 2 69 15 69 10 69 05 69 00 69

0.08 0.06 0.05 0.003

0.005

0.01

0.02

0.03

0.01

0.02

0.03

0.05

Fig. 17.1.3 Series 60 radial internal/axial internal clearances

Axial internal clearance mm

Axial internal clearance mm

Fig. 17.1.1 Series 68 radial internal/axial internal clearances

0.10

0.005

Radial internal clearance mm

Radial internal clearance mm

0.20

30 60 20 60 15 05 60 10 60 60 00 60

0.20

0.30 0.20

0.10 0.08 0.06 0.05 0.003

0.05

30 62 20 2 6 15 62 10 62 05 62 00 62

0.005

0.01

0.02

0.03

0.05

Radial internal clearance mm

Radial internal clearance mm Fig. 17.1.2 Series 69 radial internal/axial internal clearances

Fig. 17.1.4 Series 62 radial internal/axial internal clearances

A-100


�Technical Data ”This data is based on typical dimensions. NTN do not guarantee at this data.

17.2 Angular contact ball bearing axial load and axial displacement

mm

0.04

0.03

Axial displacement

Axial displacement

mm

0.04

5

790

0.02

7910 7915 7920

0.01

7930

00

72

0.03 5

720

0.02

721

1.0

1.5

7230

0.01

0 0.5

0

0.5

2.5

2.0

5

7220

0 0

7210

1.0

1.5

2.0

2.5

Axial load kN

Axial load kN

Fig. 17.2.4 Series 72 axial load and axial displacement

Fig. 17.2.1 Series 79 axial load and axial displacement

0.04 mm

00

70

0.03

Axial displacement

Axial displacement mm

0.04

05

70

0.02

7010

5

701

0.01

7020

7030

0

0

0.5

1.0 1.5 Axial load kN

2.0

mm Axial displacement

0.03

0.01

B 7005 B 7010

7015B 7020B

7030B

0

0

0.5

1.0 1.5 Axial load kN

2.0

7205B 7210B

0.01

7215B

B

7220

7230B

0

0.5

1.0 1.5 Axial load kN

2.0

2.5

Fig. 17.2.5 Series 72 B axial load and axial displacement

0.04

0B 700

0B

720

0.02

0

2.5

Fig. 17.2.2 Series 70 axial load and axial displacement

0.02

0.03

2.5

Fig. 17.2.3 Series 70 B axial load and axial displacement

A-101


�Technical Data ”This data is based on typical dimensions. NTN do not guarantee at this data.

17.3 Tapered roller bearing axial load and axial displacement

17.4 Allowable axial load for ball bearings

32 T-

4

3201

0.01

0

X

010

32 4T-

0.02

5XU

0XU

3202

rie se

150

63

5X

00

0.03

s

200 Allowable axial load kN

Axial displacement mm

0.04

100

62

ies

ies ser 60 eries 69 s

50

eries

68 s

0 0

2000

1000

3000

ser

0

4000

50

100

150

Bearing bore diameter mm Axial load kN FIg. 17.3.1 Series 320 axial load and axial displacement

Fig. 17.4.1 Allowable axial load for deep groove ball bearings

U 0X 91 32 U 15X 329

0.02

Allowable axial load kN

Axial displacement mm

0.03

U

20X

329

0.01

200 ies ser ries e Bs 73 s erie ries 72 s B se 2 ies 7 ser 70

150

73

100 50

79 series

0 0

0 0

1000

2000

3000

4000

50

100

150

200

Bearing bore diameter mm

Axial load kN Fig. 17.4.2 Allowable axial load for angullar contact ball bearings

Fig. 17.3.2 Series 329 axial load and axial displacement

03 05

0 31 -30 T 4

4T -3

Axial displacement mm

0.03

Note: When an axial load acts upon deep groove or angular contact ball bearings, allowable axial load is the load whereby the contact ellipse exceeds the shoulder of the raceway.

5U

31

30

0U

32

30

0.02

5D

030

4T-3

310D

4T-30

0.01

30315D

U

0 0

1000

2000

3000

4000

Axial load kN FIg. 17.3.3 Series 303/303 D axial load and axial displacement Note: Values when bearing and housing are rigid bodies. Axial displacement may become large depending on shape of shaft/housing and fitting conditions.

A-102


●Technical Data

interference ∆d derived from the measured valued for the bearing bore diameter and shaft. This difference is due to the roughness or variations of the finished surfaces to be fitted, and therefore it is necessary to assume the following reductions in effective interference:

17.5 Fitting surface pressure Table 17.5.1 lists equations for calculating the pressure and maximum stress between fitting surfaces. Table 17.5.2 can be used to determine the approximate average groove diameter for bearing inner and outer rings. The effective interference, in other words the actual interference ∆deff after fitting, is smaller than the apparent

For ground shafts: 1.0 ∼ 2.5μm For lathed shafts : 5.0 ∼ 7.0μm

Table 17.5.1 Fitting surface pressure and maximum stress

∆deff

2

d

d

1- (

Di

)

2

do Di

Fitting surface pressure

Hollow steel shaft/ inner ring fit

P=

E

∆deff

2

2

2

[1- (d / Di) ][1- (do / d) ] 2

[1 - (do / Di) ]

∆d

∆deff E D

2

2

E

∆Deff [1 - (Do / D) ][1 - (D / Dh) ]

2

D

Steel housing/ MPa 2 {kgf / mm } outer ring fit

P=

Maximum Shaft / inner ring fit stress

σt max = P

MPa {kgf / mm2}

σt max = P

2

Housing/ outer ring fit

1 + (d / Di)

2

Outer ring inner diameter face maximum tangential stress

2

1 – (Do / D)

Average groove diameter Bearing type

Deep groove ball bearings

All types

Cylindrical roller bearings1 All types Spherical All types roller bearings

1.05

4d + D

Outer ring (Do ) 0.95

5 0.98 4 2d + D 3

d + 4D 5

3d + D 1.05

d + 3D 4

0.97

Dh ∆Deff

: Housing inner diameter, bearing outer diameter : Outer ring average groove diameter : Housing outer diameter : Effective interference

Inner ring bore diameter face maximum tangential stress

2

1 – (d / Di)

Table 17.5.2 Average groove diameter (approximate expression)

Inner ring (Di )

Do

2

[1 - (Do /Dh) ]

: Shaft diameter, inner ring bore diameter : Hollow shaft inner diameter : Inner ring average groove diameter : Effective interference : Elasticity factor = 208,000 MPa{ 21,200 kgf / mm2 }

d + 4D 5

d: Inner ring bore diameter mm D: Outer ring outer diameter mm 1 Average groove diameter values shown for double-flange type.

A-103

D Dh

P=

E

do d

d Solid steel shaft/ inner ring fit

Di

Codes (units: N {kgf}, mm)

Equation

Do

Fit conditions


Pm

2 MPa kgf/mm 250 25 200 20 150 15

kgf/mm2 MPa 5 50 4 40 3 30

2

20

1

10

100

10

50 40

5 4

30

3

20

2

10

1

p6 n6 m5 k5

0.5 0.4

5 4

0.3

3

0.2

2

0.1

1

js5

5 20

30

50

70 100

200 300

17.6 Necessary press fit and pullout force Equations (17.1) and (17.2) below can be used to calculate the necessary pullout force for press fit for inner rings and shafts or outer rings and housings. For shaft and inner rings: Kd = μ・P・π・d・B ………………………(17.1) For housing and outer rings: KD = μ・P・π・D・B ………………………(17.2) Where, Kd : Inner ring press fit or pullout force N{kgf} KD : Outer ring press fit or pullout force N{kgf} P : Fitting surface pressure MPa{kgf/mm2} (Refer to Table 17.5.1) d : Shaft diameter, inner ring bore diameter mm D : Housing inner diameter, outer ring outer diameter mm B : Inner or outer ring width μ : Sliding friction coefficient (Refer to Table 17.6.1)

Maximum stress

Fitting surface pressure

●Technical Data

σt max

0.5

500

Nominal bearing bore diameter (Class 0)

mm

Fig. 17.5.1 Average fit interference as it relates to surface pressure Pm and max. stress σt max

Pm

5 4

50 40

3

30

2

1

MPa kgf/mm2 400 40

p6

20

n6

10

m5 k5 js5

0.5 0.4

5 4

0.3

3

0.2

2

20

30

50

70 100

200 300

300 250 200

30 25 20

150

15

100

10

50

5

40 30

4 3

20

2

10

1

Table 17.6.1 Press fit and pullout sliding friction coefficient

Maximum stress

Fitting surface pressure

kgf/mm2 MPa 10 100

σt max

500

Nominal bearing bore diameter (Class 0)

mm

Fig. 17.5.2 Maximum fit interference as it relates to surface pressure Pm and max. stress σt max 1 For recommended fitting, see page A-50.

A-104

Type

μ

Inner (outer) ring press fit onto cylindrical shaft (bore) Inner (outer) ring pullout from cylindrical shaft (bore) Inner ring press fit onto tapered shaft or sleeve Inner ring pullout from tapered shaft Sleeve press fit onto shaft/bearing Sleeve pullout from shaft/bearing

0.12 0.18 0.17 0.14 0.30 0.33


Ball and Roller Bearings


INDEX OF BEARING TABLES

Deep Groove Ball Bearings ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ B-5 Deep groove ball bearings

67,68,69,160,60,62,63,64 ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ B-8

Expansion compensating bearings AC bearings

EC-60,EC-62,EC-63⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ B-26

AC-60, AC-A2, AC-63 ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ B-28

Miniature and Extra Small Ball Bearings ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ B-31 Metric series

67,68,69,60,62,63,BC ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ B-34

Inch series R,RA ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ B-38 With ring grooves, snap rings

SC⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ B-40

Angular Contact Ball Bearings ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ B-43 Single and duplex angular contact ball bearings Four-point contact ball bearings

79,70,72,72B,73,73B⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ B-46

QJ2,QJ3 ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ B-58

Double row angular contact ball bearings

52,53 ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ B-60

Self-Aligning Ball Bearings ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ B-65 12(K), 22(K), 13(K), 23(K) ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ B-66 Adapters for self-aligning ball bearings ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ B-72

Cylindrical Roller Bearings ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ B-77 NU,NJ,NUP,N,NF10,2,22,3,23,4 ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ B-80 L type loose rib

HJ2,22,3,23,4 ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ B-98

Double row cylindrical roller bearings Four-row cylindrical roller bearings

NN49(K),NNU49(K),NN30(K),NNU30(K) ⋯⋯⋯⋯⋯⋯ B-102

4R ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ B-108

B-2


Tapered Roller Bearings ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ B-119 Metric series

329X,320X,330,331,302,322,322C,332,303,303D,313X,323,323C ⋯⋯⋯⋯⋯ B-128

Inch series ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ B-146 Double row tapered roller bearings (back-to-back arrangement) 4130,4230,4131,4231,4302,4322,4303,4303D,4323 ⋯⋯⋯⋯⋯⋯⋯⋯⋯ B-184 Double row tapered roller bearings (face-to-face arrangement) 3230,3231 ⋯⋯⋯⋯⋯⋯⋯⋯ B-198 Four-row tapered roller bearings

CR0 ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ B-202

Spherical Roller Bearings ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ B-219 239(K),230(K),240(K30),231(K),241(K30),222(K),232(K),213(K),223(K) ⋯⋯⋯⋯⋯⋯⋯⋯⋯ B-222 Adapters for spherical roller bearings⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ B-242 Withdrawal sleeves for spherical roller bearings ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ B-247

Thrust Bearings ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ B-255 Single direction thrust ball bearings Spherical roller thrust bearings

511,512,513,514 ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ B-258

292,293,294 ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ B-262

B-3


●Deep Groove Ball Bearings

Open type

Shielded type

Sealed type (non-contact)

Expansion Compensating Bearing

1. Design features and special characteristics Deep groove ball bearings are very widely used. A deep groove is formed on each inner and outer ring of the bearing enabling them to sustain radial and axial loads in either direction as well as well as the complex loads which result from the combination of these forces. Deep groove ball bearings are suitable for high speed applications.

In addition to unsealed bearings, deep groove ball bearings include ball bearings with greased sealed inside (sealed or shielded) and bearings with a snap ring that simplify structure around the bearing and design. Table 1 shows the construction and special characteristics of various sealed deep groove ball bearings.

Table 1 Sealed ball bearings: construction and characteristics Type, code no.

Shielded type Non-contact type ZZ

Sealed type Non-contact type LLB

Contact type LLU

Low torque type LLH

¡Metal shield plate is affixed to outside ring; inner ring incorporates a V-groove and labyrinth clearance.

¡Outer ring incorporates synthetic rubber molded to a steel plate; seal edge is aligned with V-groove along inner ring surface with labyrinth clearance.

¡Outer ring incorporates synthetic rubber molded to a steel plate; seal edge contacts V-groove along inner ring surface.

¡Basic construction the same as LU type, but specially designed lip on edge of seal prevents penetration by foreign matter; low torque construction.

Torque

Low

Low

Rather high

Medium

Dust proofing

Very good

Better than ZZ-type

Excellent

Much better than LLB-type

Water proofing

Poor

Poor

Very good

Very good

High speed capacity

Same as open type

Same as open type

Limited by contact seals

Much better than LLU-type

Allowable temp.range 1

Depends on lubricant

-25 ℃∼120 ℃

-25 ℃∼110 ℃

-25 ℃∼120 ℃

Construction

Performance comparison

1 Please consult NTN Engineering about applications which exceed the allowable temperature range of products listed on this table. Note : This chart lists double shielded and double sealed bearings, but single shielded (Z) and single sealed (LB, LU, LH) are also available. Grease lubrication should be used with single shielded and single sealed bearings.

B-5


●Deep Groove Ball Bearings

2. Standard cage types As shown in Table 2, pressed cages are generally used in deep groove ball bearings. Machined cages are however used for large bearings and high-speed bearings.

advantage is a large reduction in the occurrence of outer ring creeping. (1) Allowable load Maximum allowable load Cp (refer to the table of boundary dimensions) has been determined in accordance with outer ring strength; therefore, it is necessary to select a bearing with a maximum allowable load greater than the largest anticipated bearing load.

Table 2 Standard cage for deep groove ball bearings Bearing series 67 68 69 160 60 62 63 64

Pressed cages

Machined cages

6700∼ 6706 6800∼ 6834 6900∼ 6934 16001∼16052 6000∼ 6052 6200∼ 6244 6300∼ 6344 6403∼ 6416

― 6836∼ 68/600 6936∼ 69/500 16056∼ 16072 6056∼ 6084 ― ― ―

(2) Housing and bearing fit Table 3 shows the recommended fits for bearings with light metal alloy housings. In cases where the bearing is going to be interference fit with the housing, it is very important not to damage the high polymer material. Therefore it is essential that the lip of the housing diameter be given a 10˚–15˚ chamfer as shown in Diagram 2. Furthermore, as shown in Diagram 2, it is also advisable to apply the interference fit using a press in order not force the bearing into the housing in a misaligned position. (Diagram 2)

3. Other bearing types 3. 1 Bearings with snap rings Some bearings accommodate a snap ring which is attached along the outer diameter of the outer ring. By using snap rings, positioning in the axial direction is possible and housing installation is simplified. In addition to open type, shielded and sealed types are also manufactured. Consult NTN Engineering.

(3) Radial internal clearance Regulations for radial internal clearance are the same as those for standard deep groove ball bearings. For standard fit and application conditions, a C3 clearance is used with

3. 2 Expansion compensating bearings (creep prevention bearings)

Table 3 Recommended fits for outer ring and housing bore

The boundary dimensions of expansion compensating deep groove ball bearings are the same as for standard bearings, but formed high polymer material with a high expansion rate is provided in the grooves on the outer circumference of the outer ring (see Diagram 1) . Due to the extremely small difference of thermal expansion attained between the fitted surfaces of the high polymer equipped outer ring and the light alloy bearing housing, a good interference fit can be achieved with stable performance across a wide temperature range. Another

Conditions

High polymer material

Load type, etc.

Housing material

Rotating outer ring load Rotating inner ring load; light load Direction indeterminate load; ordinary load

Al alloy Mg alloy Other light alloys

Rotating outer ring load; heavy load Direction indeterminate load; shock load

Al alloy Mg alloy Other light alloys

0.5mm over

Diagram 1. Expansion compensating bearings

Suitable bearing

Housing bore tolerance class

Deep groove ball bearing H6 Cylindrical roller bearing Thickwalled type deep groove ball bearing

N6

10° ∼15°

Diagram 2. Fitting method and housing inner diameter chamfer

B-6


●Deep Groove Ball Bearings

this bearing. For more detailed information concerning this bearing and the availability of roller bearings contact NTN Engineering.

in the outside circumference of the outer ring. (Diagram 3) This bearing has a steel housing, can withstand rotating outer ring loads, and is suitable for applications where a "tight fit" is not possible but the fear of creeping exists. With its capacity for axial load displacement, an AC bearing can also be installed as a floating side bearing to accommodate shaft fluctuations. Before installing the bearing into the housing, high viscosity oil (base oil viscosity, 100 mm2/s or more) or grease should be applied to the space between the two Orings. This lubricant forms a thin oil layer inside the bearing which prevents contact between the outer ring and housing, lowers the coefficient of friction, and is still able to prevent creeping by utilizing the friction force of the O-rings.Outer ring spin is prevented by friction force of the O-ring and housing.

(4) Allowable temperature range -20∼120˚C

3.3 Long-life bearings (TMB/TAB bearings) Boundary dimensions of long-life bearings are the same as those of standard deep groove ball bearings, but the bearings have undergone special heat treatment that considerably extends wear life. These bearings are especially effective in countering reduced wear life due to the effects of infiltration by dust and other foreign matter. Features are as follows: ¡Rated load is the same as standard bearings, but shaft characteristics factor is a2 = 2.2 for TMB bearings and a2 = 3.6 for TAB. ¡TMB 62 series bearings can be used in place of standard 63 series bearings enabling lighter weight, more compact designs ¡Greater resistance to reduced wear life due to infiltration by dust and other foreign matter

For dimensional specifications, handling procedures, and other detailed information concerning AC bearings, contact NTN Engineering. (1) Allowable load Because allowable load Cp that takes outer ring strength into account (see dimensions table) is established, selection must be made so that maximum load on the bearing does not exceed Cp. (2) Fit with housing Table 4 gives recommended fit with steel housing.

Dimensions for these bearings are not provided in the dimensions table. For details, please contact NTN Engineering.

30˚

Oil

Min. 0.006D

AC bearings have the same boundary dimensions as standard bearings with the addition of two O-rings imbedded

O-rings

φD G7

3.4 AC bearings (creep prevention bearings)

Diagram 4. Housing Table 4 dimensions and shape Housing bore tolerance

G7

Housing bore entrance chamfer

Max. 30˚C

Housing bore chamfer grinding undercut

Min. 0.006D

Housing bore finish roughness Housing bore roundness

2.5μm Ra 1/2 bearing housing dimension tolerance

(3) Allowable temperature range -25 ∼120˚C Diagram 3. AC bearing

B-7


● Deep Groove Ball Bearings

B r

r φD

φd

Shielded type (ZZ)

Open type

Non-contact sealed type (LLB, LLF)

Low torque sealed type (LLH)

Contact sealed type (LLU)

d 10 ∼ 20mm Boundary dimensions

Basic load ratings Factor dynamic static dynamic static

Limiting speeds

Bearing numbers

-1

mm

kN

kgf

rNS d

D

B

rs min1)

min

10

15 19 22 26 30 35

3 5 6 8 9 11

0.1 0.3 0.3 0.3 0.6 0.6

12

18 21 24 28 28 32 37

4 5 6 7 8 10 12

15

21 24 28 32 32 35 42

min grease oil open type open type ZZ LLB Z LB LLH

LLU

noncontact open shielded sealed type type type

low torque contact sealed sealed type type

Cr

Cor

Cr

Cor

fo

― ― 0.3 ― 0.5 0.5

0.855 1.83 2.7 4.55 5.10 8.20

0.435 0.925 1.27 1.96 2.39 3.50

87 187 275 465 520 835

44 94 129 200 244 355

15.7 14.8 14.0 12.4 13.2 11.4

10 000 32 000 30 000 29 000 25 000 23 000

12 000 38 000 36 000 34 000 30 000 27 000

― ― ― 25 000 21 000 20 000

― 24 000 21 000 21 000 18 000 16 000

6700 6800 6900 6000 6200 6300

― ZZ ZZ ZZ ZZ ZZ

― ― ― LLB ― LLU LLB ― LLU LLB LLH LLU LLB LLH LLU LLB LLH LLU

0.2 0.3 0.3 0.3 0.3 0.6 1

― ― 0.3 ― ― 0.5 0.5

0.930 1.92 2.89 5.10 5.10 6.10 9.70

0.530 1.04 1.46 2.39 2.39 2.75 4.20

95 195 295 520 520 620 990

54 106 149 244 244 280 425

16.2 15.3 14.5 13.2 13.2 12.7 11.1

8 300 29 000 27 000 26 000 26 000 22 000 20 000

9 500 35 000 32 000 30 000 30 000 26 000 24 000

― ― ― ― 21 000 20 000 19 000

― 20 000 19 000 ― 18 000 16 000 15 000

6701 6801 6901 16001 6001 6201 6301

― ZZ ZZ ― ZZ ZZ ZZ

LLF ― ― LLB ― LLU LLB ― LLU ― ― ― LLB LLH LLU LLB LLH LLU LLB LLH LLU

4 5 7 8 9 11 13

0.2 0.3 0.3 0.3 0.3 0.6 1

― 0.940 ― 2.08 0.3 3.65 ― 5.60 0.3 5.60 0.5 7.75 0.5 11.4

0.585 96 1.26 212 2.00 375 2.83 570 2.83 570 3.60 790 5.45 1 170

59 128 204 289 289 365 555

16.5 15.8 14.8 13.9 13.9 12.7 12.3

6 600 26 000 24 000 22 000 22 000 19 000 17 000

7 600 31 000 28 000 26 000 26 000 23 000 21 000

― ― ― ― 18 000 18 000 15 000

― 17 000 16 000 ― 15 000 15 000 12 000

6702 6802 6902 16002 6002 6202 6302

― ZZ ZZ ― ZZ ZZ ZZ

LLF ― ― LLB ― LLU LLB ― LLU ― ― ― LLB LLH LLU LLB LLH LLU LLB LLH LLU

17

23 26 30 35 35 40 47 62

4 5 7 8 10 12 14 17

0.2 0.3 0.3 0.3 0.3 0.6 1 1.1

― 1.00 0.660 102 67 ― 2.23 1.46 227 149 0.3 4.65 2.58 475 263 ― 6.80 3.35 695 345 0.3 6.80 3.35 695 345 0.5 9.60 4.60 980 465 0.5 13.5 6.55 1 380 665 ― 22.7 10.8 2 320 1 100

16.3 16.1 14.7 13.6 13.6 12.8 12.2 11.1

5 000 24 000 22 000 20 000 20 000 18 000 16 000 14 000

6 700 28 000 26 000 24 000 24 000 21 000 19 000 16 000

― ― ― ― 16 000 15 000 14 000 ―

― 15 000 14 000 ― 14 000 12 000 11 000 ―

6703 6803 6903 16003 6003 6203 6303 6403

― ZZ ZZ ― ZZ ZZ ZZ ―

LLF ― ― LLB ― LLU LLB ― LLU ― ― ― LLB LLH LLU LLB LLH LLU LLB LLH LLU ― ― ―

20

27 32 37 42 42 47 52

4 7 9 8 12 14 15

0.2 0.3 0.3 0.3 0.6 1 1.1

― 1.04 0.3 4.00 0.3 6.40 ― 7.90 0.5 9.40 0.5 12.8 0.5 15.9

16.1 15.5 14.7 14.5 13.9 13.2 12.4

5 000 21 000 19 000 18 000 18 000 16 000 14 000

5 700 25 000 23 000 21 000 21 000 18 000 17 000

― ― ― ― 13 000 12 000 12 000

― 13 000 12 000 ― 11 000 10 000 10 000

6704 6804 6904 16004 6004 6204 6304

― ZZ ZZ ― ZZ ZZ ZZ

LLF ― ― LLB ― LLU LLB ― LLU ― ― ― LLB LLH LLU LLB LLH LLU LLB LLH LLU

0.730 106 2.47 410 3.70 650 4.50 810 5.05 955 6.65 1 310 7.90 1 620

74 252 375 455 515 680 805

1)Smallest allowable dimension for chamfer dimension r.

B-8


● Deep Groove Ball Bearings CY a B rN

f b rNa

r ro

ro

r

φD φD1

Dynamic equivalent radial load Pr=XFr+YFa Fa Fa fo・Fa ≦e Fr Fr >e e Cor X Y X Y 0.172 0.19 2.30 0.345 0.22 1.99 0.689 0.26 1.71 1.03 0.28 1.55 0 0.56 1.45 1.38 0.30 1 2.07 0.34 1.31 3.45 0.38 1.15 5.17 0.42 1.04 6.89 0.44 1.00

CZ

ra

φd

With snap ring groove

Bearing numbers

φda

Static equivalent radial load Por=0.6Fr+0.5Fa When Por<Fr use Por=Fr

With snap ring

Snap ring groove dimensions mm

snap2) snap2) ring ring D1 groove max

φDXφDa

φD2

Snap ring dimensions mm

Mass4)

Abutment and fillet dimensions mm

a

b

ro

D2

f

max

min

max

max

max

min

da max3)

kg

Da

DX

CY

CZ

ras

r Nas

max

(approx.)

max

min

max

max

(approx.)

― ― N ―5) N N

― ― NR ―5) NR NR

― ― 20.8 ― 28.17 33.17

― ― ― ― 1.05 0.8 ― ― 2.06 1.35 2.06 1.35

― ― 0.2 ― 0.4 0.4

― ― 24.8 ― 34.7 39.7

― ― 0.7 ― 1.12 1.12

10.8 12 12 12 14 14

― 12.5 13 13.5 16 17

14.2 17 20 24 26 31

― ― 25.5 ― 35.5 40.5

― ― 1.5 ― 2.9 2.9

― ― 0.7 ― 1.2 1.2

0.1 0.3 0.3 0.3 0.6 0.6

― ― 0.3 ― 0.5 0.5

0.0015 0.005 0.009 0.019 0.032 0.053

― ― N ― ―5) N N

― ― NR ― ―5) NR NR

― ― 22.8 ― ― 30.15 34.77

― ― 1.05 ― ― 2.06 2.06

― ― 0.2 ― ― 0.4 0.4

― ― 26.8 ― ― 36.7 41.3

― ― 0.7 ― ― 1.12 1.12

13.6 14 14 14 14 16 17

13.8 14.5 15 ― 16 17 18.5

16.4 19 22 26 26 28 32

― ― 27.5 ― ― 37.5 42

― ― 1.5 ― ― 2.9 2.9

― ― 0.7 ― ― 1.2 1.2

0.2 0.3 0.3 0.3 0.3 0.6 1

― ― 0.3 ― ― 0.5 0.5

0.002 0.006 0.011 0.019 0.021 0.037 0.06

― ― N ― N N N

― ― NR ― NR NR NR

― ― 26.7 ― 30.15 33.17 39.75

― ― ― ― 1.3 0.95 ― ― 2.06 1.35 2.06 1.35 2.06 1.35

― ― 0.25 ― 0.4 0.4 0.4

― ― 30.8 ― 36.7 39.7 46.3

― ― 0.85 ― 1.12 1.12 1.12

16.6 17 17 17 17 19 20

16.8 17.5 17.5 ― 19 20 23

19.4 22 26 30 30 31 37

― ― 31.5 ― 37.5 40.5 47

― ― 1.9 ― 2.9 2.9 2.9

― ― 0.9 ― 1.2 1.2 1.2

0.2 0.3 0.3 0.3 0.3 0.6 1

― ― 0.3 ― 0.3 0.5 0.5

0.0025 0.007 0.016 0.025 0.03 0.045 0.082

― ― N ― N N N ―

― ― NR ― NR NR NR ―

― ― 28.7 ― 33.17 38.1 44.6 ―

― ― 1.3 ― 2.06 2.06 2.46 ―

― ― 0.95 ― 1.35 1.35 1.35 ―

― ― 0.25 ― 0.4 0.4 0.4 ―

― ― 32.8 ― 39.7 44.6 52.7 ―

― ― 0.85 ― 1.12 1.12 1.12 ―

18.6 19 19 19 19 21 22 23.5

18.8 19.5 20 ― 21 23 25 ―

21.4 24 28 33 33 36 42 55.5

― ― 33.5 ― 40.5 45.5 53.5 ―

― ― 1.9 ― 2.9 2.9 3.3 ―

― ― 0.9 ― 1.2 1.2 1.2 ―

0.2 0.3 0.3 0.3 0.3 0.6 1 1

― ― 0.3 ― 0.3 0.5 0.5 ―

0.0025 0.008 0.018 0.032 0.039 0.066 0.115 0.27

― N N ― N N N

― NR NR ― NR NR NR

― 30.7 35.7 ― 39.75 44.6 49.73

― ― 1.3 0.95 1.7 0.95 ― ― 2.06 1.35 2.46 1.35 2.46 1.35

― 0.25 0.25 ― 0.4 0.4 0.4

― 34.8 39.8 ― 46.3 52.7 57.9

― 0.85 0.85 ― 1.12 1.12 1.12

21.6 22 22 22 24 25 26.5

22.3 22.5 24 ― 26 28 28.5

25.4 30 35 40 38 42 45.5

― 35.5 40.5 ― 47 53.5 58.5

― 1.9 2.3 ― 2.9 3.3 3.3

― 0.9 0.9 ― 1.2 1.2 1.2

0.2 0.3 0.3 0.3 0.6 1 1

― 0.3 0.3 ― 0.5 0.5 0.5

0.0045 0.019 0.036 0.051 0.069 0.106 0.144

― ― 0.8 ― ― 1.35 1.35

2)Sealed and shielded bearings are also available. 3)This dimension applies to sealed and shielded bearings. 4)Does not include bearings with snap rings. 5)See page B-40.

B-9


● Deep Groove Ball Bearings

B r

r φD

φd

Shielded type (ZZ)

Open type

Non-contact sealed type (LLB, LLF)

Low torque sealed type (LLH)

Contact sealed type (LLU)

d 20 ∼ 35mm Boundary dimensions

Basic load ratings Factor dynamic static dynamic static

Limiting speeds

Bearing numbers

-1

mm

kN

kgf

rNS d

D

B

rs min1)

min

Cr

Cor

20

72

19

1.1

28.5

13.9

22

44 50 56

12 14 16

0.6 1 1.1

0.5 9.40 0.5 12.9 0.5 18.4

25

32 37 42 47 47 52 62 80

4 7 9 8 12 15 17 21

0.2 0.3 0.3 0.3 0.6 1 1.1 1.5

― 0.3 0.3 ― 0.5 0.5 0.5 ―

28

52 58 68

12 16 18

0.6 1 1.1

0.5 12.5 0.5 17.9 0.5 26.7

30

37 42 47 55 55 62 72 90

4 7 9 9 13 16 19 23

0.2 0.3 0.3 0.3 1 1 1.1 1.5

― 0.3 0.3 ― 0.5 0.5 0.5 ―

32

58 65 75

13 17 20

1 1 1.1

35

47 55 62 62 72 80 100

7 10 9 14 17 21 25

0.3 0.6 0.3 1 1.1 1.5 1.5

Cr

Cor

fo

min grease oil open type open type ZZ LLB Z LB LLH

LLU

noncontact open shielded sealed type type type

11.4

12 000

14 000

6404

515 690 945

13.9 13.5 12.4

17 000 14 000 13 000

20 000 17 000 15 000

13 000 12 000 11 000

10 000 9 700 9 200

60/22 62/22 63/22

ZZ ZZ ZZ

LLB LLH LLU LLB LLH LLU LLB LLH LLU

112 86 435 300 715 460 855 520 1 030 595 1 430 800 2 160 1 110 3 550 1 780

15.8 16.1 15.4 15.1 14.5 13.9 12.6 11.6

4 000 18 000 16 000 15 000 15 000 13 000 12 000 10 000

4 600 21 000 19 000 18 000 18 000 15 000 14 000 12 000

― ― ― ― 11 000 11 000 9 700 ―

― 10 000 9 800 ― 9 400 8 900 8 100 ―

6705 6805 6905 16005 6005 6205 6305 6405

― ZZ ZZ ― ZZ ZZ ZZ ―

LLF ― ― LLB ― LLU LLB ― LLU ― ― ― LLB LLH LLU LLB LLH LLU LLB LLH LLU ― ― ―

7.40 1 270 755 9.75 1 830 995 14.0 2 730 1 430

14.5 13.4 12.4

14 000 12 000 11 000

16 000 14 000 13 000

10 000 9 700 8 900

8 400 8 100 7 400

60/28 62/28 63/28

ZZ ZZ ZZ

LLB LLH LLU LLB LLH LLU LLB LLH LLU

117 97 480 370 740 510 1 150 750 1 350 845 1 980 1 150 2 720 1 530 4 400 2 440

15.7 16.5 15.8 15.2 14.8 13.8 13.3 12.3

3 300 15 000 14 000 13 000 13 000 11 000 10 000 8 800

3 800 18 000 17 000 15 000 15 000 13 000 12 000 10 000

― ― ― ― 9 200 8 800 7 900 ―

― 8.800 8 400 ― 7 700 7 300 6 600 ―

6706 6806 6906 16006 6006 6206 6306 6406

― ZZ ZZ ― ZZ ZZ ZZ ―

LLF ― ― LLB ― LLU LLB ― LLU ― ― ― LLB LLH LLU LLB LLH LLU LLB LLH LLU ― ― ―

0.5 11.8 0.5 20.7 0.5 29.8

8.05 1 200 820 11.6 2 110 1 190 16.9 3 050 1 730

15.4 13.6 13.1

12 000 11 000 9 500

15 000 12 000 11 000

8 700 8 400 7 700

7 200 7 100 6 500

60/32 62/32 63/32

ZZ ZZ ZZ

LLB LLH LLU LLB LLH LLU LLB LLH LLU

0.3 0.5 ― 0.5 0.5 0.5 ―

4.05 6.85 8.20 10.3 15.3 19.1 31.0

16.4 15.8 15.6 14.8 13.8 13.1 12.3

13 000 12 000 12 000 12 000 9 800 8 800 7 800

16 000 15 000 14 000 14 000 11 000 10 000 9 100

― ― ― 8 200 7 600 7 300 ―

7 600 7 100 ― 6 800 6 300 6 000 ―

6807 6907 16007 6007 6207 6307 6407

ZZ ZZ ― ZZ ZZ ZZ ―

LLB ― LLU LLB ― LLU ― ― ― LLB LLH LLU LLB LLH LLU LLB LLH LLU ― ― ―

5.05 955 6.80 1 320 9.25 1 880

1.10 0.840 4.30 2.95 7.05 4.55 8.35 5.10 10.1 5.85 14.0 7.85 21.2 10.9 34.5 17.5

1.14 0.950 4.70 3.65 7.25 5.00 11.2 7.35 13.2 8.3 19.5 11.3 26.7 15.0 43.5 23.9

4.90 9.55 11.7 16.0 25.7 33.5 55.0

2 900 1 420

500 975 1 190 1 630 2 620 3 400 5 600

410 695 835 1 050 1 560 1 950 3 150

1)Smallest allowable dimension for chamfer dimension r.

B-10

low torque contact sealed sealed type type


● Deep Groove Ball Bearings CY a B rN

f

Dynamic equivalent radial load Pr=XFr+YFa Fa Fa fo・Fa ≦e Fr Fr >e e Cor X Y X Y 0.172 0.19 2.30 0.345 0.22 1.99 0.689 0.26 1.71 1.03 0.28 1.55 0 0.56 1.45 1.38 0.30 1 2.07 0.34 1.31 3.45 0.38 1.15 5.17 0.42 1.04 6.89 0.44 1.00

CZ

b rNa

r ro

ro

r

φD φD1

ra

φd

With snap ring groove

Bearing numbers

N N N

NR NR NR

41.75 47.6 53.6

― N N ― N N N ―

― NR NR ― NR NR NR ―

― 35.7 40.7 ― 44.6 49.73 59.61 ―

N N N

NR NR NR

49.73 55.6 64.82

― N N ― N N N ―

― NR NR ― NR NR NR ―

― 40.7 45.7 ― 52.6 59.61 68.81 ―

N N N

NR NR NR

55.6 62.6 71.83

N N ― N N N

NR NR ― NR NR NR ―

45.7 53.7 ― 59.61 68.81 76.81 ―

φda

Static equivalent radial load Por=0.6Fr+0.5Fa When Por<Fr use Por=Fr

With snap ring

Snap ring groove dimensions mm

snap2) snap2) ring ring D1 groove max

φDXφDa

φD2

Snap ring dimensions mm

a

b

ro

D2

f

max

min

max

max

max

― 2.06 2.46 2.46

― 1.35 1.35 1.35

― ― 1.3 0.95 1.7 0.95 ― ― 2.06 1.35 2.46 1.35 3.28 1.9 ― ― 2.06 2.46 3.28

1.35 1.35 1.9

― ― 1.3 0.95 1.7 0.95 ― ― 2.08 1.35 3.28 1.9 3.28 1.9 ― ― 2.08 3.28 3.28

1.35 1.9 1.9

1.3 0.95 1.7 0.95 ― ― 2.08 1.9 3.28 1.9 3.28 1.9 ― ―

Mass4)

Abutment and fillet dimensions mm da min

max3)

kg

Da

DX

CY

CZ

ras

r Nas

max

(approx.)

max

min

max

max

26.5

65.5

1

(approx.)

0.4

0.4 0.4 0.4

48.3 55.7 61.7

1.12 1.12 1.12

26 27 28.5

26.5 29.5 31

40 45 49.5

49 56.5 62.5

2.9 3.3 3.3

1.2 1.2 1.2

0.6 1 1

0.5 0.5 0.5

0.074 0.117 0.176

― 0.25 0.25 ― 0.4 0.4 0.6 ―

― 39.8 44.8 ― 52.7 57.9 67.7 ―

― 0.85 0.85 ― 1.12 1.12 1.7 ―

26.6 27 27 27 29 30 31.5 33

27.3 28 29 ― 30.5 32 35 ―

30.4 35 40 45.0 43 47 55.5 72

― 40.5 45.5 ― 53.5 58.5 68.5 ―

― 1.9 2.3 ― 2.9 3.3 4.6 ―

― 0.9 0.9 ― 1.2 1.2 1.7 ―

0.2 0.3 0.3 0.3 0.6 1 1 1.5

― 0.3 0.3 ― 0.5 0.5 0.5 ―

0.005 0.022 0.042 0.06 0.08 0.128 0.232 0.53

0.4 0.4 0.6

57.9 63.7 74.6

1.12 1.12 1.7

32 33 34.5

34 35.5 38.5

48 53 61.5

58.5 64.5 76

2.9 3.3 4.6

1.2 1.2 1.7

0.6 1 1

0.5 0.5 0.5

0.098 0.171 0.284

― 0.25 0.25 ― 0.4 0.6 0.6 ―

― 44.8 49.8 ― 60.7 67.7 78.6 ―

― 0.85 0.85 ― 1.12 1.7 1.7 ―

31.6 32 32 32 35 35 36.5 38

32.3 33 34 ― 37 39 43 ―

35.4 40 45 53 50 57 65.5 82

― 45.5 50.5 ― 61.5 68.5 80 ―

― 1.9 2.3 ― 2.9 4.6 4.6 ―

― 0.9 0.9 ― 1.2 1.7 1.7 ―

0.2 0.3 0.3 0.3 1 1 1 1.5

― 0.3 0.3 ― 0.5 0.5 0.5 ―

0.006 0.026 0.048 0.091 0.116 0.199 0.36 0.735

0.4 0.6 0.6

63.7 70.7 81.6

1.12 1.7 1.7

37 37 38.5

39 40 43.5

53 60 68.5

64.5 71.5 83

2.9 4.6 4.6

1.2 1.7 1.7

0.5 0.5 0.5

0.129 0.226 0.382

0.25 0.25 ― 0.6 0.6 0.6 ―

49.8 57.8 ― 67.7 78.6 86.6 ―

0.85 0.85 ― 1.7 1.7 1.7 ―

37 39 37 40 41.5 43 43

38 40 ― 42 45 47 ―

45 51 60 57 65.5 72 92

50.5 58.5 ― 68.5 80 88 ―

1.9 2.3 ― 3.4 4.6 4.6 ―

0.9 0.9 ― 1.7 1.7 1.7 ―

0.3 0.5 ― 0.5 0.5 0.5 ―

0.029 0.074 0.11 0.155 0.288 0.457 0.952

1 1 1 0.3 0.6 0.3 1 1 1.5 1.5

2)Sealed and shielded bearings are also available. 3)This dimension applies to sealed and shielded bearings. 4)Does not include bearings with snap rings.

B-11


● Deep Groove Ball Bearings

B r

r φD

φd

Shielded type (ZZ)

Open type

Non-contact sealed type (LLB, LLF)

Low torque sealed type (LLH)

Contact sealed type (LLU)

d 40 ∼ 60mm Boundary dimensions

Basic load ratings Factor dynamic static dynamic static

Limiting speeds

Bearing numbers

-1

mm

kN

kgf

rNS d

D

B

rs min1)

min

40

52 62 68 68 80 90 110

7 12 9 15 18 23 27

0.3 0.6 0.3 1 1.1 1.5 2

0.3 0.5 ― 0.5 0.5 0.5 ―

45

58 68 75 75 85 100 120

7 12 10 16 19 25 29

0.3 0.6 0.6 1 1.1 1.5 2

50

65 72 80 80 90 110 130

7 12 10 16 20 27 31

55

72 80 90 90 100 120 140

60

78 85 95 95 110 130 150

Cr

fo

LLU

noncontact open shielded sealed type type type

low torque contact sealed sealed type type

Cor

Cr

5.10 12.2 12.6 16.8 29.1 40.5 63.5

4.40 8.90 9.65 11.5 17.8 24.0 36.5

520 1 240 1 290 1 710 2 970 4 150 6 500

445 910 985 1 170 1 820 2 450 3 750

16.3 15.8 16.0 15.2 14.0 13.2 12.3

12 000 11 000 10 000 10 000 8 700 7 800 7 000

14 000 13 000 12 000 12 000 10 000 9 200 8 200

― ― ― 7 300 6 700 6 400 ―

6 700 6 300 ― 6 100 5 600 5 300 ―

6808 6908 16008 6008 6208 6308 6408

ZZ ZZ ― ZZ ZZ ZZ ―

LLB ― LLU LLB ― LLU ― ― ― LLB LLH LLU LLB LLH LLU LLB LLH LLU ― ― ―

0.3 0.5 ― 0.5 0.5 0.5 ―

5.35 13.1 12.9 21.0 32.5 53.0 77.0

4.95 10.4 10.5 15.1 20.4 32.0 45.0

550 1 330 1 320 2 140 3 350 5 400 7 850

500 1 060 1 070 1 540 2 080 3 250 4 600

16.1 16.1 16.2 15.3 14.1 13.1 12.1

11 000 9 800 9 200 9 200 7 800 7 000 6 300

12 000 12 000 11 000 11 000 9 200 8 200 7 400

― ― ― 6 500 6 200 5 600 ―

5 900 5 600 ― 5 400 5 200 4 700 ―

6809 6909 16009 6009 6209 6309 6409

ZZ ZZ ― ZZ ZZ ZZ ―

LLB ― LLU LLB ― LLU ― ― ― LLB LLH LLU LLB LLH LLU LLB LLH LLU ― ― ―

0.3 0.6 0.6 1 1.1 2 2.1

0.3 0.5 ― 0.5 0.5 0.5 ―

6.60 13.4 13.2 21.8 35.0 62.0 83.0

6.10 11.2 11.3 16.6 23.2 38.5 49.5

670 1 370 1 350 2 230 3 600 6 300 8 450

620 1 140 1 150 1 690 2 370 3 900 5 050

16.1 16.3 16.4 15.5 14.4 13.2 12.5

9 600 8 900 8 400 8 400 7 100 6 400 5 700

11 000 11 000 9 800 9 800 8 300 7 500 6 700

― ― ― 6 000 5 700 5 000 ―

5 300 5 100 ― 5 000 4 700 4 200 ―

6810 6910 16010 6010 6210 6310 6410

ZZ ZZ ― ZZ ZZ ZZ ―

LLB ― LLU LLB ― LLU ― ― ― LLB LLH LLU LLB LLH LLU LLB LLH LLU ― ― ―

9 13 11 18 21 29 33

0.3 1 0.6 1.1 1.5 2 2.1

0.3 0.5 ― 0.5 0.5 0.5 ―

8.80 16.0 18.6 28.3 43.5 71.5 89.0

8.10 13.3 15.3 21.2 29.2 45.0 54.0

900 1 630 1 900 2 880 4 450 7 300 9 050

825 1 350 1 560 2 170 2 980 4 600 5 500

16.2 16.2 16.2 15.3 14.3 13.2 12.7

8 700 8 200 7 700 7 700 6 400 5 800 5 200

10 000 9 600 9 000 9 000 7 600 6 800 6 100

― ― ― ― ― ― ―

4 800 4 600 ― 4 500 4 300 3 900 ―

6811 6911 16011 6011 6211 6311 6411

ZZ ZZ ― ZZ ZZ ZZ ―

LLB LLB ― LLB LLB LLB ―

― ― ― ― ― ― ―

LLU LLU ― LLU LLU LLU ―

10 13 11 18 22 31 35

0.3 1 0.6 1.1 1.5 2.1 2.1

0.3 0.5 ― 0.5 0.5 0.5 ―

10.6 1 170 14.3 1 670 17.5 2 040 23.2 3 000 36.0 5 350 52.0 8 350 64.5 10 400

1 080 1 450 1 780 2 370 3 700 5 300 6 550

16.3 16.4 16.3 15.6 14.3 13.2 12.6

8 000 7 600 7 000 7 000 6 000 5 400 4 800

9 400 8 900 8 300 8 300 7 000 6 300 5 700

― ― ― ― ― ― ―

4 400 4 300 ― 4 100 3 800 3 600 ―

6812 6912 16012 6012 6212 6312 6412

ZZ ZZ ― ZZ ZZ ZZ ―

LLB LLB ― LLB LLB LLB ―

― ― ― ― ― ― ―

LLU LLU ― LLU LLU LLU ―

11.5 16.4 20.0 29.5 52.5 82.0 102

Cor

min grease oil open type open type ZZ LLB Z LB LLH

1)Smallest allowable dimension for chamfer dimension r.

B-12


● Deep Groove Ball Bearings CY a B rN

f b rNa

r ro

ro

r

φD φD1

Dynamic equivalent radial load Pr=XFr+YFa Fa Fa fo・Fa ≦e Fr Fr >e e Cor X Y X Y 0.172 0.19 2.30 0.345 0.22 1.99 0.689 0.26 1.71 1.03 0.28 1.55 0 0.56 1.45 1.38 0.30 1 2.07 0.34 1.31 3.45 0.38 1.15 5.17 0.42 1.04 6.89 0.44 1.00

CZ

ra

φd

With snap ring groove

Bearing numbers

φda

Static equivalent radial load Por=0.6Fr+0.5Fa When Por<Fr use Por=Fr

With snap ring

Snap ring groove dimensions mm

snap2) snap2) ring ring D1 groove max

φDXφDa

φD2

Snap ring dimensions mm

Mass4)

Abutment and fillet dimensions mm

a

b

ro

D2

f

max

min

max

max

max

min

da max3)

kg

Da

DX

CY

CZ

ras

r Nas

max

(approx.)

max

min

max

max

50 58 66 63 73.5 82 101

(approx.)

N N ― N N N ―

NR NR ― NR NR NR ―

50.7 60.7 ― 64.82 76.81 86.79 ―

1.3 0.95 1.7 0.95 ― ― 2.49 1.9 3.28 1.9 3.28 2.7 ― ―

0.25 0.25 ― 0.6 0.6 0.6 ―

54.8 64.8 ― 74.6 86.6 96.5 ―

0.85 0.85 ― 1.7 1.7 2.46 ―

42 44 42 45 46.5 48 49

43 45 ― 47 51 54 ―

55.5 65.5 ― 76 88 98 ―

1.9 2.3 ― 3.8 4.6 5.4 ―

0.9 0.9 ― 1.7 1.7 2.5 ―

0.3 0.6 0.3 1 1 1.5 2.0

0.3 0.5 ― 0.5 0.5 0.5 ―

0.033 0.11 0.125 0.19 0.366 0.63 1.23

N N ― N N N ―

NR NR ― NR NR NR ―

56.7 66.7 ― 71.83 81.81 96.8 ―

1.3 0.95 1.7 0.95 ― ― 2.49 1.9 3.28 1.9 3.28 2.7 ― ―

0.25 0.25 ― 0.6 0.6 0.6 ―

60.8 70.8 ― 81.6 91.6 106.5 ―

0.85 0.85 ― 1.7 1.7 2.46 ―

47 49 49 50 51.5 53 54

48 56 61.5 51 64 72 ― 71 ― 52.5 70 83 55.5 78.5 93 61.5 92 108 ― 111 ―

1.9 2.3 ― 3.8 4.6 5.4 ―

0.9 0.9 ― 1.7 1.7 2.5 ―

0.3 0.6 0.6 1 1 1.5 2

0.3 0.5 ― 0.5 0.5 0.5 ―

0.04 0.128 0.171 0.237 0.398 0.814 1.53

N N ― N N N ―

NR 63.7 NR 70.7 ― ― NR 76.81 NR 86.79 NR 106.81 ― ―

1.3 0.95 1.7 0.95 ― ― 2.49 1.9 3.28 2.7 3.28 2.7 ― ―

0.25 0.25 ― 0.6 0.6 0.6 ―

67.8 74.8 ― 86.6 96.5 116.6 ―

0.85 0.85 ― 1.7 2.46 2.46 ―

52 54 54 55 56.5 59 61

54 63 68.5 55.5 68 76 ― 76 ― 57.5 75 88 60 83.5 98 68.5 101 118 ― 119 ―

1.9 2.3 ― 3.8 5.4 5.4 ―

0.9 0.9 ― 1.7 2.5 2.5 ―

0.3 0.6 0.6 1 1 2 2

0.3 0.5 ― 0.5 0.5 0.5 ―

0.052 0.132 0.18 0.261 0.454 1.07 1.88

N N ― N N N ―

NR 70.7 NR 77.9 ― ― NR 86.79 NR 96.8 NR 115.21 ― ―

1.7 0.95 2.1 1.3 ― ― 2.87 2.7 3.28 2.7 4.06 3.1 ― ―

0.25 0.4 ― 0.6 0.6 0.6 ―

74.8 84.4 ― 96.5 106.5 129.7 ―

0.85 1.12 ― 2.46 2.46 2.82 ―

57 60 59 61.5 63 64 66

59 70 76 61.5 75 86 ― 86 ― 64 83.5 98 67 92 108 74 111 131.5 ― 129 ―

2.3 2.9 ― 5 5.4 6.5 ―

0.9 1.2 ― 2.5 2.5 2.9 ―

0.3 1 0.6 1 1.5 2 2

0.3 0.5 ― 0.5 0.5 0.5 ―

0.083 0.18 0.258 0.388 0.601 1.37 2.29

N N ― N N N ―

NR 76.2 NR 82.9 ― ― NR 91.82 NR 106.81 NR 125.22 ― ―

1.7 1.3 2.1 1.3 ― ― 2.87 2.7 3.28 2.7 4.06 3.1 ― ―

0.4 0.4 ― 0.6 0.6 0.6 ―

82.7 89.4 ― 101.6 116.6 139.7 ―

1.12 1.12 ― 2.46 2.46 2.82 ―

62 65 64 66.5 68 71 71

64.5 76 84 66.5 80 91 ― 91 ― 69 88.5 103 75 102 118 80.5 119 141.5 ― 139 ―

2.5 2.9 ― 5 5.4 6.5 ―

1.2 1.2 ― 2.5 2.5 2.9 ―

0.3 1 0.6 1 1.5 2 2

0.3 0.5 ― 0.5 0.5 0.5 ―

0.106 0.193 0.283 0.414 0.783 1.73 2.77

2)Sealed and shielded bearings are also available. 3)This dimension applies to sealed and shielded bearings. 4)Does not include bearings with snap rings.

B-13


● Deep Groove Ball Bearings

B r

r φD

φd

Open type

Shielded type (ZZ)

Non-contact sealed type (LLB)

Contact sealed type (LLU)

d 65 ∼ 85mm Boundary dimensions

Basic load ratings dynamic static dynamic

Factor

Limiting speeds -1

mm

kN

kgf

rNS rs min1)

Cr

fo

LLU

B

65

85 90 100 100 120 140 160

10 13 11 18 23 33 37

0.6 1 0.6 1.1 1.5 2.1 2.1

0.5 0.5 ― 0.5 0.5 0.5 ―

11.6 17.4 20.5 30.5 57.5 92.5 111

11.0 1 180 16.1 1 770 18.7 2 090 25.2 3 100 40.0 5 850 60.0 9 450 72.5 11 300

1 120 1 640 1 910 2 570 4 100 6 100 7 400

16.2 16.6 16.5 15.8 14.4 13.2 12.7

7 400 7 000 6 500 6 500 5 500 4 900 4 400

8 700 8 200 7 700 7 700 6 500 5 800 5 200

4 100 4 000 ― 3 900 3 600 3 300 ―

6813 6913 16013 6013 6213 6313 6413

ZZ ZZ ― ZZ ZZ ZZ ―

LLB LLB ― LLB LLB LLB ―

LLU LLU ― LLU LLU LLU ―

70

90 100 110 110 125 150 180

10 16 13 20 24 35 42

0.6 1 0.6 1.1 1.5 2.1 3

0.5 0.5 ― 0.5 0.5 0.5 ―

12.1 23.7 24.4 38.0 62.0 104 128

11.9 1 230 21.2 2 420 22.6 2 480 31.0 3 900 44.0 6 350 68.0 10 600 89.5 13 100

1 220 2 160 2 300 3 150 4 500 6 950 9 100

16.1 16.3 16.5 15.6 14.5 13.2 12.7

6 900 6 500 6 100 6 100 5 100 4 600 4 100

8 100 7 700 7 100 7 100 6 000 5 400 4 800

3 800 3 700 ― 3 600 3 400 3 100 ―

6814 6914 16014 6014 6214 6314 6414

ZZ ZZ ― ZZ ZZ ZZ ―

LLB LLB ― LLB LLB LLB ―

LLU LLU ― LLU LLU LLU ―

75

95 105 115 115 130 160 190

10 16 13 20 25 37 45

0.6 1 0.6 1.1 1.5 2.1 3

0.5 0.5 ― 0.5 0.5 0.5 ―

12.5 24.4 25.0 39.5 66.0 113 138

12.9 1 280 22.6 2 480 24.0 2 540 33.5 4 050 49.5 6 750 77.0 11 600 99.0 14 000

1 310 2 300 2 450 3 400 5 050 7 850 10 100

16.0 16.5 16.6 15.8 14.7 13.2 12.7

6 400 6 100 5 700 5 700 4 800 4 300 3 800

7 600 7 200 6 700 6 700 5 600 5 000 4 500

3 600 3 500 ― 3 300 3 200 2 900 ―

6815 6915 16015 6015 6215 6315 6415

ZZ ZZ ― ZZ ZZ ZZ ―

LLB LLB ― LLB LLB LLB ―

LLU LLU ― LLU LLU LLU ―

80

100 110 125 125 140 170 200

10 16 14 22 26 39 48

0.6 1 0.6 1.1 2 2.1 3

0.5 0.5 ― 0.5 0.5 0.5 ―

12.7 13.3 1 290 24.9 24.0 2 540 25.4 25.1 2 590 47.5 40.0 4 850 72.5 53.0 7 400 123 86.5 12 500 164 125 16 700

1 360 2 450 2 560 4 050 5 400 8 850 12 800

16.0 16.6 16.4 15.6 14.6 13.3 12.3

6 000 5 700 5 300 5 300 4 500 4 000 3 600

7 100 6 700 6 200 6 200 5 300 4 700 4 200

3 400 3 200 ― 3 100 3 000 2 700 ―

6816 6916 16016 6016 6216 6316 6416

ZZ ZZ ― ZZ ZZ ZZ ―

LLB LLB ― LLB LLB LLB ―

LLU LLU ― LLU LLU LLU ―

110 120 130 130 150 180

13 18 14 22 28 41

1 1.1 0.6 1.1 2 3

0.5 0.5 ― 0.5 0.5 0.5

18.7 32.0 25.9 49.5 83.5 133

1 940 3 000 2 670 4 400 6 500 9 850

16.2 16.4 16.4 15.8 14.7 13.3

5 700 5 400 5 000 5 000 4 200 3 800

6 700 6 300 5 900 5 900 5 000 4 500

3 100 3 000 ― 2 900 2 800 2 600

6817 6917 16017 6017 6217 6317

ZZ ZZ ― ZZ ZZ ZZ

LLB LLB ― LLB LLB LLB

LLU LLU ― LLU LLU LLU

19.0 1 910 29.6 3 250 26.2 2 640 43.0 5 050 64.0 8 500 97.0 13 500

Cor

nonlowcontact torque contact open shielded sealed sealed type type type type

D

85

Cor

min grease oil open type open type ZZ LLB Z LB

d

min

Cr

Bearing numbers

static

1)Smallest allowable dimension for chamfer dimension r.

B-14


● Deep Groove Ball Bearings CY a B rN

f b rNa

r ro

ro

r

φD φD1

Dynamic equivalent radial load Pr=XFr+YFa Fa Fa fo・Fa ≦e Fr Fr >e e Cor X Y X Y 0.172 0.19 2.30 0.345 0.22 1.99 0.689 0.26 1.71 1.03 0.28 1.55 0 0.56 1.45 1.38 0.30 1 2.07 0.34 1.31 3.45 0.38 1.15 5.17 0.42 1.04 6.89 0.44 1.00

CZ

ra

φd

With snap ring groove

Bearing numbers

φda

Static equivalent radial load Por=0.6Fr+0.5Fa When Por<Fr use Por=Fr

With snap ring

Snap ring groove dimensions mm

snap2) snap2) ring ring D1 groove max

φDXφDa

φD2

Snap ring dimensions mm

a

b

ro

D2

f

max

min

max

max

max

Mass4)

Abutment and fillet dimensions mm da min

max3)

kg

Da

DX

CY

CZ

ras

r Nas

max

(approx.)

max

min

max

max

(approx.)

N N ― N N N ―

NR 82.9 1.7 1.3 NR 87.9 2.1 1.3 ― ― ― ― NR 96.8 2.87 2.7 NR 115.21 4.06 3.1 NR 135.23 4.9 3.1 ― ― ― ―

0.4 0.4 ― 0.6 0.6 0.6 ―

89.4 94.4 ― 106.5 129.7 149.7 ―

1.12 1.12 ― 2.46 2.82 2.82 ―

69 70 69 71.5 73 76 76

70 81 91 71.5 85 96 ― 96 ― 74 93.5 108 80.5 112 131.5 86 129 152 ― 149 ―

2.5 2.9 ― 5 6.5 7.3 ―

1.2 1.2 ― 2.5 2.9 2.9 ―

0.6 1 0.6 1 1.5 2 2

0.5 0.5 ― 0.5 0.5 0.5 ―

0.128 0.206 0.307 0.421 0.99 2.08 3.3

N N ― N N N ―

NR 87.9 1.7 1.3 NR 97.9 2.5 1.3 ― ― ― ― NR 106.81 2.87 2.7 NR 120.22 4.06 3.1 NR 145.24 4.9 3.1 ― ― ― ―

0.4 0.4 ― 0.6 0.6 0.6 ―

94.4 104.4 ― 116.6 134.7 159.7 ―

1.12 1.12 ― 2.46 2.82 2.82 ―

74 75 74 76.5 78 81 83

75.5 77.5 ― 80.5 85 92.5 ―

86 95 106 103.5 117 139 167

96 106 ― 118 136.5 162 ―

2.5 3.3 ― 5 6.5 7.3 ―

1.2 1.2 ― 2.5 2.9 2.9 ―

0.6 1 0.6 1 1.5 2 2.5

0.5 0.5 ― 0.5 0.5 0.5 ―

0.137 0.334 0.441 0.604 1.07 2.52 4.83

N N ― N N N ―

NR NR ― NR NR NR ―

92.9 1.7 1.3 102.6 2.5 1.3 ― ― ― 111.81 2.87 2.7 125.22 4.06 3.1 155.22 4.9 3.1 ― ― ―

0.4 0.4 ― 0.6 0.6 0.6 ―

99.4 110.7 ― 121.6 139.7 169.7 ―

1.12 1.12 ― 2.46 2.82 2.82 ―

79 80 79 81.5 83 86 88

80 82.5 ― 85.5 90.5 99 ―

91 100 111 108.5 122 149 177

101 112 ― 123 141.5 172 ―

2.5 3.3 ― 5 6.5 7.3 ―

1.2 1.2 ― 2.5 2.9 2.9 ―

0.6 1 0.6 1 1.5 2 2.5

0.5 0.5 ― 0.5 0.5 0.5 ―

0.145 0.353 0.464 0.649 1.18 3.02 5.72

N N ― N N N ―

NR NR ― NR NR NR ―

97.9 1.7 1.3 107.6 2.5 1.3 ― ― ― 120.22 2.87 3.1 135.23 4.9 3.1 163.65 5.69 3.5 ― ― ―

0.4 0.4 ― 0.6 0.6 0.6 ―

104.4 115.7 ― 134.7 149.7 182.9 ―

1.12 1.12 ― 2.82 2.82 3.1 ―

84 85 85 88 84 ― 86.5 91.5 89 95.5 91 105 93 ―

96 105 121 118.5 131 159 187

106 117 ― 136.5 152 185 ―

2.5 3.3 ― 5.3 7.3 8.4 ―

1.2 1.2 ― 2.9 2.9 3.1 ―

0.6 1 0.6 1 2 2 2.5

0.5 0.5 ― 0.5 0.5 0.5 ―

0.154 0.373 0.597 0.854 1.4 3.59 6.76

N N ― N N N

NR NR ― NR NR NR

107.6 2.1 1.3 117.6 3.3 1.3 ― ― ― 125.22 2.87 3.1 145.24 4.9 3.1 173.66 5.69 3.5

0.4 0.4 ― 0.6 0.6 0.6

115.7 125.7 ― 139.7 159.7 192.9

1.12 1.12 ― 2.82 2.82 3.1

90 91 91.5 94 89 ― 91.5 97 94 103 98 112

105 113.5 126 123.5 141 167

117 127 ― 141.5 162 195

2.9 4.1 ― 5.3 7.3 8.4

1.2 1.2 ― 2.9 2.9 3.1

1 1 0.6 1 2 2.5

0.5 0.5 ― 0.5 0.5 0.5

0.27 0.536 0.626 0.89 1.79 4.23

2)Sealed and shielded bearings are also available. 3)This dimension applies to sealed and shielded bearings. 4)Does not include bearings with snap rings.

B-15


● Deep Groove Ball Bearings

B r

r φD

φd

Open type

Shielded type (ZZ)

Non-contact sealed type (LLB)

Contact sealed type (LLU)

d 90 ∼ 120mm Boundary dimensions

Basic load ratings dynamic static dynamic

Factor

Limiting speeds -1

mm

kN

Bearing numbers

static

kgf

rNS

min grease oil open type open type ZZ LLB Z LB

nonlowcontact torque contact open shielded sealed sealed type type type type

d

D

B

rs min1)

min

90

115 125 140 140 160 190

13 18 16 24 30 43

1 1.1 1 1.5 2 3

0.5 0.5 ― 0.5 0.5 0.5

19.0 19.7 1 940 33.0 31.5 3 350 33.5 33.5 3 400 58.0 49.5 5 950 96.0 71.5 9 800 143 107 14 500

2 010 3 200 3 400 5 050 7 300 10 900

16.1 16.5 16.5 15.6 14.5 13.3

5 400 5 100 4 700 4 700 4 000 3 600

6 300 6 000 5 600 5 600 4 700 4 200

3 000 2 900 ― 2 800 2 600 2 400

6818 6918 16018 6018 6218 6318

ZZ ZZ ― ZZ ZZ ZZ

LLB LLB ― LLB LLB LLB

LLU LLU ― LLU LLU LLU

95

120 130 145 145 170 200

13 18 16 24 32 45

1 1.1 1 1.5 2.1 3

0.5 0.5 ― 0.5 0.5 0.5

19.3 20.5 1 970 33.5 33.5 3 450 34.5 35.0 3 500 60.5 54.0 6 150 109 82.0 11 100 153 119 15 600

2 090 3 400 3 550 5 500 8 350 12 100

16.1 16.6 16.5 15.8 14.4 13.3

5 000 4 800 4 500 4 500 3 700 3 300

5 900 5 700 5 300 5 300 4 400 3 900

2 800 2 800 ― 2 600 2 500 2 300

6819 6919 16019 6019 6219 6319

ZZ ZZ ― ZZ ZZ ZZ

LLB LLB ― LLB LLB ―

LLU LLU ― LLU LLU LLU

100

125 140 150 150 180 215

13 20 16 24 34 47

1 1.1 1 1.5 2.1 3

0.5 0.5 ― 0.5 0.5 ―

19.6 21.2 2 000 41.0 39.5 4 200 35.0 36.5 3 600 60.0 54.0 6 150 122 93.0 12 500 173 141 17 600

2 160 4 050 3 750 5 500 9 450 14 400

16.0 16.4 16.4 15.9 14.4 13.2

4 800 4 500 4 200 4 200 3 500 3 200

5 600 5 300 5 000 5 000 4 200 3 700

2 700 2 600 ― 2 600 2 300 2 200

6820 6920 16020 6020 6220 6320

ZZ ZZ ― ZZ ZZ ZZ

LLB LLB ― LLB LLB ―

LLU LLU ― LLU LLU LLU

105

130 145 160 160 190 225

13 20 18 26 36 49

1 1.1 1 2 2.1 3

0.5 0.5 ― 0.5 0.5 ―

19.8 22.0 2 020 42.5 42.0 4 300 52.0 50.5 5 300 72.5 65.5 7 400 133 105 13 600 184 153 18 700

2 240 4 300 5 150 6 700 10 700 15 700

15.9 16.5 16.3 15.8 14.4 13.2

4 600 4 300 4 000 4 000 3 400 3 000

5 400 5 100 4 700 4 700 4 000 3 600

― 2 500 ― 2 400 2 300 2 100

6821 6921 16021 6021 6221 6321

― ZZ ― ZZ ZZ ZZ

― LLB ― LLB ― ―

― LLU ― LLU LLU LLU

110

140 150 170 170 200 240

16 20 19 28 38 50

1 1.1 1 2 2.1 3

0.5 0.5 ― 0.5 0.5 ―

24.9 28.2 2 540 43.5 44.5 4 450 57.5 56.5 5 850 82.0 73.0 8 350 144 117 14 700 205 179 20 900

2 880 4 550 5 800 7 450 11 900 18 300

16.0 16.6 16.3 15.6 14.3 13.1

4 300 4 100 3 800 3 800 3 200 2 900

5 100 4 800 4 500 4 500 3 800 3 400

― 2 400 ― 2 300 2 200 1 900

6822 6922 16022 6022 6222 6322

― ZZ ― ZZ ZZ ZZ

― LLB ― LLB ― ―

― LLU ― LLU LLU LLU

120

150 165 180 180

16 22 19 28

1 0.5 1.1 0.5 1 ― 2 0.5

3 350 5 500 6 450 8 100

16.0 16.5 16.4 15.9

4 000 3 800 3 500 3 500

4 700 4 400 4 100 4 100

― ― ― 2 100

6824 6924 16024 6024

― ― ― ZZ

― ― ― LLB

― ― ― LLU

Cr

28.9 53.0 63.0 85.0

Cor

33.0 54.0 63.5 79.5

Cr

2 950 5 400 6 450 8 650

Cor

fo

1)Smallest allowable dimension for chamfer dimension r.

B-16

LLU


● Deep Groove Ball Bearings CY a B rN

f b rNa

r ro

ro

r

φD φD1

Dynamic equivalent radial load Pr=XFr+YFa Fa Fa fo・Fa ≦e Fr Fr >e e Cor X Y X Y 0.172 0.19 2.30 0.345 0.22 1.99 0.689 0.26 1.71 1.03 0.28 1.55 0 0.56 1.45 1.38 0.30 1 2.07 0.34 1.31 3.45 0.38 1.15 5.17 0.42 1.04 6.89 0.44 1.00

CZ

ra

φd

With snap ring groove

Bearing numbers

φda

Static equivalent radial load Por=0.6Fr+0.5Fa When Por<Fr use Por=Fr

With snap ring

Snap ring groove dimensions mm

snap2) snap2) ring ring D1 groove max

φDXφDa

φD2

Snap ring dimensions mm

a

b

ro

D2

f

max

min

max

max

max

Mass4)

Abutment and fillet dimensions mm da min

max3)

kg

Da

DX

CY

CZ

ras

r Nas

max

(approx.)

max

min

max

max

(approx.)

N N ― N N N

NR NR ― NR NR NR

112.6 2.1 1.3 122.6 3.3 1.3 ― ― ― 135.23 3.71 3.1 155.22 4.9 3.1 183.64 5.69 3.5

0.4 0.4 ― 0.6 0.6 0.6

120.7 130.7 ― 149.7 169.7 202.9

1.12 1.12 ― 2.82 2.82 3.1

95 96 96.5 99 95 ― 98 102 99 109 103 118

110 118.5 135 132 151 177

122 132 ― 152 172 205

2.9 4.1 ― 6.1 7.3 8.4

1.2 1.2 ― 2.9 2.9 3.1

1 1 1 1.5 2 2.5

0.5 0.5 ― 0.5 0.5 0.5

0.285 0.554 0.848 1.02 2.15 4.91

N N ― N N N

NR NR ― NR NR NR

117.6 2.1 1.3 127.6 3.3 1.3 ― ― ― 140.23 3.71 3.1 163.65 5.69 3.5 193.65 5.69 3.5

0.4 0.4 ― 0.6 0.6 0.6

125.7 135.7 ― 154.7 182.9 212.9

1.12 1.12 ― 2.82 3.1 3.1

100 101.5 100 103 106 108

101 104 ― 109 116 125

115 123.5 140 137 159 187

127 137 ― 157 185 215

2.9 4.1 ― 6.1 8.4 8.4

1.2 1.2 ― 2.9 3.1 3.1

1 1 1 1.5 2 2.5

0.5 0.5 ― 0.5 0.5 0.5

0.3 0.579 0.885 1.08 2.62 5.67

N N ― N N N

NR NR ― NR NR NR

122.6 2.1 1.3 137.6 3.3 1.9 ― ― ― 145.24 3.71 3.1 173.66 5.69 3.5 208.6 5.69 3.5

0.4 0.6 ― 0.6 0.6 1

130.7 145.7 ― 159.7 192.9 227.8

1.12 1.7 ― 2.82 3.1 3.1

105 106.5 105 108 111 113

106 110 ― 110 122 133

120 133.5 145 142 169 202

132 147 ― 162 195 230

2.9 4.7 ― 6.1 8.4 8.4

1.2 1.7 ― 2.9 3.1 3.1

1 1 1 1.5 2 2.5

0.5 0.5 ― 0.5 0.5 0.5

0.313 0.785 0.91 1.15 3.14 7

N N ― N N N

NR NR ― NR NR NR

127.6 2.1 1.3 142.6 3.3 1.9 ― ― ― 155.22 3.71 3.1 183.64 5.69 3.5 217.0 6.5 4.5

0.4 0.6 ― 0.6 0.6 1

135.7 150.7 ― 169.7 202.9 237

1.12 1.7 ― 2.82 3.1 3.5

110 111.5 110 114 116 118

― 115 ― 119 125 134

125 138.5 155 151 179 212

137 152 ― 172 205 239

2.9 4.7 ― 6.1 8.4 9.6

1.2 1.7 ― 2.9 3.1 3.5

1 1 1 2 2 2.5

0.5 0.5 ― 0.5 0.5 0.5

0.33 0.816 1.2 1.59 3.7 8.05

N N ― N N N

NR NR ― NR NR NR

137.6 2.5 1.9 147.6 3.3 1.9 ― ― ― 163.65 3.71 3.5 193.65 5.69 3.5 232.0 6.5 4.5

0.6 0.6 ― 0.6 0.6 1

145.7 155.7 ― 182.9 212.9 252

1.7 1.7 ― 3.1 3.1 3.5

115 116.5 115 119 121 123

― 120 ― 126 132 149

135 143.5 165 161 189 227

147 157 ― 185 215 254

3.9 4.7 ― 6.4 8.4 9.6

1.7 1.7 ― 3.1 3.1 3.5

1 1 1 2 2 2.5

0.5 0.5 ― 0.5 0.5 0.5

0.515 0.849 1.46 1.96 4.36 9.54

N N ― N

NR 147.6 2.5 1.9 NR 161.8 3.7 1.9 ― ― ― ― NR 173.66 3.71 3.5

0.6 0.6 ― 0.6

155.7 171.5 ― 192.9

1.7 1.7 ― 3.1

125 ― 126.5 ― 125 ― 129 136

145 157 158.5 173 175 ― 171 195

3.9 5.1 ― 6.4

1.7 1.7 ― 3.1

1 1 1 2

0.5 0.5 ― 0.5

0.555 1.15 1.56 2.07

2)Sealed and shielded bearings are also available. 3)This dimension applies to sealed and shielded bearings. 4)Does not include bearings with snap rings.

B-17


● Deep Groove Ball Bearings

B r

r φD

φd

Open type

Shielded type (ZZ)

Contact sealed type (LLU)

d 120 ∼ 170mm Boundary dimensions dynamic

Basic load ratings static dynamic

Factor

Limiting speeds

Bearing numbers

static -1

mm

kN

kgf

rNS rs min1)

min

40 55

2.1 3

130

165 180 200 200 230 280

18 24 22 33 40 58

140

175 190 210 210 250 300

d

D

B

120

215 260

Cr

Cor

LLU

contact open shielded sealed type type type

Cr

Cor

― ―

155 207

131 185

15 900 21 100

13 400 18 800

14.4 13.5

2 900 2 600

3 400 3 100

2 000 ―

6224 6324

ZZ ―

LLU ―

1.1 1.5 1.1 2 3 4

0.5 0.5 ― 0.5 ― ―

37.0 65.0 80.0 106 167 229

41.0 67.5 79.5 101 146 214

3 750 6 650 8 150 10 800 17 000 23 400

4 200 6 850 8 100 10 300 14 900 21 800

16.1 16.5 16.2 15.8 14.5 13.6

3 700 3 500 3 200 3 200 2 700 2 400

4 300 4 100 3 800 3 800 3 100 2 800

― ― ― 1 900 ― ―

6826 6926 16026 6026 6226 6326

― ― ― ZZ ― ―

― ― ― LLU ― ―

18 24 22 33 42 62

1.1 1.5 1.1 2 3 4

0.5 0.5 ― ― ― ―

38.5 66.5 82.0 110 166 253

44.5 71.5 85.0 109 150 246

3 900 6 800 8 350 11 200 17 000 25 800

4 550 7 300 8 650 11 100 15 300 25 100

16.0 16.6 16.4 15.9 14.8 13.6

3 400 3 200 3 000 3 000 2 500 2 200

4 000 3 800 3 500 3 500 2 900 2 600

― ― ― 1 800 ― ―

6828 6928 16028 6028 6228 6328

― ― ― ZZ ― ―

― ― ― LLU ― ―

150

190 210 225 225 270 320

20 28 24 35 45 65

1.1 2 1.1 2.1 3 4

0.5 ― ― ― ― ―

47.5 85.0 96.5 126 176 274

55.0 90.5 101 126 168 284

4 850 8 650 9 850 12 800 18 000 28 000

5 600 9 200 10 300 12 800 17 100 28 900

16.1 16.5 16.4 15.9 15.1 13.9

3 100 3 000 2 800 2 800 2 300 2 100

3 700 3 500 3 200 3 200 2 700 2 400

― ― ― 1 700 ― ―

6830 6930 16030 6030 6230 6330

― ― ― ZZ ― ―

― ― ― LLU ― ―

160

200 220 240 240 290 340

20 28 25 38 48 68

1.1 2 1.5 2.1 3 4

0.5 ― ― ― ― ―

48.5 87.0 99.0 143 185 278

57.0 96.0 108 144 186 286

4 950 8 850 10 100 14 500 18 900 28 300

5 800 9 800 11 000 14 700 19 000 29 200

16.1 16.6 16.5 15.9 15.4 13.9

2 900 2 800 2 600 2 600 2 100 1 900

3 400 3 300 3 000 3 000 2 500 2 300

― ― ― 1 600 ― ―

6832 6932 16032 6032 6232 6332

― ― ― ZZ ― ―

― ― ― LLU ― ―

170

215 230 260 260 310 360

22 28 28 42 52 72

1.1 2 1.5 2.1 4 4

― ― ― ― ― ―

60.0 86.0 119 168 212 325

70.5 95.5 128 172 223 355

6 100 8 750 12 100 17 200 21 700 33 500

7 200 9 750 13 100 17 600 22 800 36 000

16.1 16.5 16.4 15.8 15.3 13.6

2 700 2 600 2 400 2 400 2 000 1 800

3 200 3 100 2 800 2 800 2 400 2 100

― ― ― ― ― ―

6834 6934 16034 6034 6234 6334

― ― ― ― ― ―

― ― ― ― ― ―

1)Smallest allowable dimension for chamfer dimension r.

B-18

fo

min grease oil open type open type ZZ Z


● Deep Groove Ball Bearings CY a B rN

f

Dynamic equivalent radial load Pr=XFr+YFa Fa Fa fo・Fa ≦e Fr Fr >e e Cor X Y X Y 0.172 0.19 2.30 0.345 0.22 1.99 0.689 0.26 1.71 1.03 0.28 1.55 0 0.56 1.45 1.38 0.30 1 2.07 0.34 1.31 3.45 0.38 1.15 5.17 0.42 1.04 6.89 0.44 1.00

CZ

b rNa

r ro

ro

r

φD φD1

ra

φd

With snap ring groove

Bearing numbers

Static equivalent radial load Por=0.6Fr+0.5Fa When Por<Fr use Por=Fr

Snap ring dimensions mm

a

b

ro

D2

f

max

min

max

max

max

6.5 ―

4.5 ―

N ―

NR 217.0 ― ―

N N ― N N ―

NR NR ― NR NR ―

N N ― ― N ―

NR 171.8 NR 186.8 ― ― ― ― NR 242.0 ― ―

3.3 3.7 ― ― 6.5 ―

N ― ― ― ― ―

NR 186.8 ― ― ― ― ― ― ― ― ― ―

N ― ― ― ― ― ― ― ― ― ― ―

mm da min

227.8 ―

3.1 ―

131 133

0.6 0.6 ― 0.6 1 ―

171.5 186.5 ― 212.9 242 ―

1.7 1.7 ― 3.1 3.5 ―

1.9 1.9 ― ― 4.5 ―

0.6 0.6 ― ― 1 ―

181.5 196.5 ― ― 262 ―

3.3 ― ― ― ― ―

1.9 ― ― ― ― ―

0.6 ― ― ― ― ―

NR 196.8 ― ― ― ― ― ― ― ― ― ―

3.3 ― ― ― ― ―

1.9 ― ― ― ― ―

0.6 ― ― ― ― ―

― ― ― ― ― ―

― ― ― ― ― ―

― ― ― ― ― ―

― ― ― ― ― ―

161.8 3.3 1.9 176.8 3.7 1.9 ― 193.65 5.69 3.5 222.0 6.5 4.5 ― ― ―

Mass4)

Abutment and fillet dimensions

1 ―

― ― ― ― ― ―

φda

With snap ring

Snap ring groove dimensions mm

snap2) snap2) ring ring D1 groove max

φDXφDa

φD2

max3)

Da

DX

CY

CZ

ras

r Nas

max

(approx.)

max

min

max

max

(approx.)

204 247

230 ―

9.2 ―

3.1 ―

2 2.5

0.5 ―

5.15 12.4

136.5 ― 138 ― 136.5 ― 139 148 143 ― 146 ―

158.5 172 193.5 191 217 264

173 188 ― 215 244 ―

4.7 5.1 ― 8.4 9.6 ―

1.7 1.7 ― 3.1 3.5 ―

1 1.5 1 2 2.5 3

0.5 0.5 ― 0.5 0.5 ―

0.8 1.52 2.31 3.16 5.82 15.3

1.7 1.7 ― ― 3.5 ―

146.5 ― 148 ― 146.5 ― 149 158 153 ― 156 ―

168.5 183 182 198 203.5 ― 201 ― 237 264 284 ―

4.7 5.1 ― ― 9.6 ―

1.7 1.7 ― ― 3.5 ―

1 1.5 1 2 2.5 3

0.5 0.5 ― ― 0.5 ―

0.85 1.62 2.45 3.35 7.57 18.5

196.5 ― ― ― ― ―

1.7 ― ― ― ― ―

156.5 ― 159 ― 156.5 ― 161 169 163 ― 166 ―

183.5 198 201 ― 218.5 ― 214 ― 257 ― 304 ―

4.7 ― ― ― ― ―

1.7 ― ― ― ― ―

1 2 1 2 2.5 3

0.5 ― ― ― ― ―

1.16 2.47 3.07 4.08 9.41 22

206.5 ― ― ― ― ―

1.7 ― ― ― ― ―

166.5 ― 169 ― 168 ― 171 183 173 ― 176 ―

193.5 208 211 ― 232 ― 229 ― 277 ― 324 ―

4.7 ― ― ― ― ―

1.7 ― ― ― ― ―

1 2 1.5 2 2.5 3

0.5 ― ― ― ― ―

1.23 2.61 3.64 5.05 11.7 26

― ― ― ― ― ―

176.5 179 178 181 186 186

― ― ― ― ― ―

― ― ― ― ― ―

1 2 1.5 2 3 3

― ― ― ― ― ―

1.63 2.74 4.93 6.76 14.5 30.7

― ― ― ― ― ―

143 ―

kg

― ― ― ― ― ―

208.5 221 252 249 294 344

― ― ― ― ― ―

2)Sealed and shielded bearings are also available. 3)This dimension applies to sealed and shielded bearings. 4)Does not include bearings with snap rings.

B-19


● Deep Groove Ball Bearings

B ra

r

ra

r φD

φDa

φd

φda

Open Type

d 180 ∼ 260mm Boundary dimensions

Basic load ratings static dynamic

dynamic

Factor

Limiting speeds

static min

mm

kN

Bearing numbers

-1

kgf fo

grease lubrication

oil lubrication

open type

7 450 12 200 13 600 20 300 24 600 41 500

16.1 16.5 16.5 15.6 15.1 13.9

2 600 2 400 2 300 2 300 1 900 1 700

3 000 2 900 2 700 2 700 2 200 2 000

6836 6936 16036 6036 6236 6336

7 450 11 500 13 700 20 100 26 000 36 000

9 000 13 000 15 900 21 900 28 700 42 500

16.1 16.6 16.6 15.8 15.0 14.1

2 400 2 300 2 100 2 100 1 800 1 600

2 900 2 700 2 500 2 500 2 100 1 900

6838 6938 16038 6038 6238 6338

91.5 168 160 243 310 500

7 550 16 000 14 400 22 200 27 400 42 000

9 300 17 100 16 300 24 800 31 500 51 000

16.1 16.2 16.6 15.6 15.2 13.8

2 300 2 200 2 000 2 000 1 700 1 500

2 700 2 600 2 400 2 400 2 000 1 800

6840 6940 16040 6040 6240 6340

76.5 160 181 241 297 410

98.0 180 216 289 365 520

7 800 16 400 18 500 24 600 30 500 42 000

10 000 18 400 22 000 29 400 37 000 53 000

16.0 16.4 16.5 15.8 15.3 14.3

2 100 2 000 1 800 1 800 1 500 1 400

2 400 2 300 2 200 2 200 1 800 1 600

6844 6944 16044 6044 6244 6344

2 2.1 2.1 3

85.0 170 178 249

112 203 217 310

8 650 17 300 18 200 25 400

11 400 20 700 22 100 32 000

15.9 16.5 16.5 16.0

1 900 1 800 1 700 1 700

2 200 2 100 2 000 2 000

6848 6948 16048 6048

2 2.1 3 4

87.0 222 227 291

120 280 299 375

8 900 22 600 23 200 29 700

12 200 28 500 30 500 38 500

15.8 16.3 16.5 15.8

1 700 1 600 1 500 1 500

2 000 1 900 1 800 1 800

6852 6952 16052 6052

rs min1)

d

D

B

180

225 250 280 280 320 380

22 33 31 46 52 75

1.1 2 2 2.1 4 4

190

240 260 290 290 340 400

24 33 31 46 55 78

200

250 280 310 310 360 420

Cr

Cor

Cr

Cor

60.5 110 117 189 227 355

73.0 119 134 199 241 405

6 200 11 200 11 900 19 300 23 200 36 000

1.5 2 2 2.1 4 5

73.0 113 134 197 255 355

88.0 127 156 215 281 415

24 38 34 51 58 80

1.5 2.1 2 2.1 4 5

74.0 157 142 218 269 410

220

270 300 340 340 400 460

24 38 37 56 65 88

1.5 2.1 2.1 3 4 5

240

300 320 360 360

28 38 37 56

260

320 360 400 400

28 46 44 65

1)Smallest allowable dimension for chamfer dimension r.

B-20


● Deep Groove Ball Bearings Dynamic equivalent radial load Pr=XFr+YFa Fa Fa fo・Fa ≦e Fr Fr >e e Cor X Y X Y 0.172 0.19 2.30 0.345 0.22 1.99 0.689 0.26 1.71 1.03 0.28 1.55 0 0.56 1.45 1.38 0.30 1 2.07 0.34 1.31 3.45 0.38 1.15 5.17 0.42 1.04 6.89 0.44 1.00 Static equivalent radial load Por=0.6Fr+0.5Fa When Por<Fr use Por=Fr

Abutment and fillet dimensions mm

Mass kg

da

Da

ras

min

max

max

(approx.)

186.5 189 189 191 196 196

218.5 241 271 269 304 364

1 2 2 2 3 3

2.03 4.76 6.49 8.8 15.1 35.6

198 199 199 201 206 210

232 251 281 279 324 380

1.5 2 2 2 3 4

2.62 4.98 6.77 9.18 18.2 41

208 211 209 211 216 220

242 269 301 299 344 400

1.5 2 2 2 3 4

2.73 7.1 8.68 11.9 21.6 46.3

228 231 231 233 236 240

262 289 329 327 384 440

1.5 2 2 2.5 3 4

3 7.69 11.3 15.7 30.2 60.8

249 251 251 253

291 309 349 347

2 2 2 2.5

4.6 8.28 12.1 16.8

269 271 273 276

311 349 387 384

2 2 2.5 3

5 13.9 18.5 25

B-21


● Deep Groove Ball Bearings

B ra

r

ra

r φD

φDa

φd

φda

Open Type

d 280 ∼ 440mm Boundary dimensions

Basic load ratings static dynamic

dynamic

Factor

Limiting speeds

static min

mm d

D

kN B

rs min1)

Cr

Bearing numbers

-1

kgf Cor

Cr

Cor

fo

grease lubrication

oil lubrication

open type

280

350 380 420 420

33 46 44 65

2 2.1 3 4

137 227 232 325

177 299 315 420

13 900 23 200 23 700 33 000

18 100 30 500 32 500 43 000

16.1 16.5 16.5 15.5

1 600 1 500 1 400 1 400

1 900 1 800 1 600 1 600

6856 6956 16056 6056

300

380 420 460 460

38 56 50 74

2.1 3 4 4

162 276 292 355

210 375 410 480

16 500 28 200 29 800 36 000

21 500 38 500 42 000 49 000

16.1 16.2 16.3 15.6

1 500 1 400 1 300 1 300

1 700 1 600 1 500 1 500

6860 6960 16060 6060

320

400 440 480 480

38 56 50 74

2.1 3 4 4

168 285 300 370

228 405 440 530

17 200 29 000 30 500 38 000

23 200 41 000 45 000 54 000

16.1 16.4 16.4 15.7

1 400 1 300 1 200 1 200

1 600 1 500 1 400 1 400

6864 6964 16064 6064

340

420 460 520 520

38 56 57 82

2.1 3 4 5

170 293 340 420

236 430 515 610

17 400 29 800 35 000 42 500

24 000 44 000 52 500 62 500

16.0 16.5 16.3 15.6

1 300 1 200 1 100 1 100

1 500 1 400 1 300 1 300

6868 6968 16068 6068

360

440 480 540 540

38 56 57 82

2.1 3 4 5

187 300 350 440

258 455 550 670

19 100 30 500 36 000 44 500

26 300 46 500 56 000 68 000

16.0 16.5 16.4 15.7

1 200 1 100 1 100 1 100

1 400 1 300 1 200 1 200

6872 6972 16072 6072

380

480 520 560

46 65 82

2.1 4 5

231 325 455

340 510 725

23 600 33 000 46 500

34 500 52 000 74 000

16.1 16.6 15.9

1 100 1 100 990

1 300 1 200 1 200

6876 6976 6076

400

500 540 600

46 65 90

2.1 4 5

226 335 510

340 535 825

23 100 34 000 52 000

34 500 54 500 84 000

16.0 16.5 15.7

1 100 990 930

1 200 1 200 1 100

6880 6980 6080

420

520 560 620

46 65 90

2.1 4 5

260 340 530

405 560 895

26 500 35 000 54 000

41 500 57 000 91 000

16.1 16.4 15.8

1 000 940 880

1 200 1 100 1 000

6884 6984 6084

440

540 600

46 74

2.1 4

264 365

420 615

26 900 37 500

43 000 63 000

16.0 16.4

950 890

1 100 1 000

6888 6988

1)Smallest allowable dimension for chamfer dimension r.

B-22


● Deep Groove Ball Bearings Dynamic equivalent radial load Pr=XFr+YFa Fa Fa fo・Fa ≦e Fr Fr >e e Cor X Y X Y 0.172 0.19 2.30 0.345 0.22 1.99 0.689 0.26 1.71 1.03 0.28 1.55 0 0.56 1.45 1.38 0.30 1 2.07 0.34 1.31 3.45 0.38 1.15 5.17 0.42 1.04 6.89 0.44 1.00 Static equivalent radial load Por=0.6Fr+0.5Fa When Por<Fr use Por=Fr

Abutment and fillet dimensions mm da

Da

ras

min

max

max

Mass kg

(approx.)

289 291 293 296

341 369 407 404

2 2 2.5 3

7.4 14.8 23 31

311 313 316 316

369 407 444 444

2 2.5 3 3

10.5 23.5 32.5 43.8

331 333 336 336

389 427 464 464

2 2.5 3 3

10.9 24.8 34.2 46.1

351 353 356 360

409 447 504 500

2 2.5 3 4

11.5 26.2 47.1 61.8

371 373 376 380

429 467 524 520

2 2.5 3 4

12.3 27.5 49.3 64.7

391 396 400

469 504 540

2 3 4

19.7 39.8 67.5

411 416 420

489 524 580

2 3 4

20.6 41.6 87.6

431 436 440

509 544 600

2 3 4

21.6 43.4 91.1

451 456

529 584

2 3

22.5 60 B-23


● Deep Groove Ball Bearings

B ra

r

ra

r φD

φDa

φd

φda

Open Type

d 460 ∼ 600mm Boundary dimensions

Basic load ratings static dynamic

dynamic

Factor

Limiting speeds

static min

mm

kN rs min1)

Cr

Bearing numbers

-1

kgf Cor

Cr

Cor

oil lubrication

open type

D

B

460

580 620

56 74

3 4

315 375

515 645

32 000 38 500

52 500 66 000

16.2 16.4

900 850

1 100 1 000

6892 6992

480

600 650

56 78

3 5

320 430

540 770

32 500 44 000

55 000 78 500

16.1 16.5

860 810

1 000 950

6896 6996

500

620 670

56 78

3 5

325 445

560 805

33 500 45 500

57 000 82 500

16.1 16.5

820 770

970 910

68/500 69/500

530

650

56

3

330

580

34 000

59 500

16.0

770

900

68/530

560

680

56

3

335

600

34 000

61 500

16.0

710

840

68/560

600

730

60

3

375

705

38 500

72 000

16.0

660

780

68/600

1)Smallest allowable dimension for chamfer dimension r.

B-24

fo

grease lubrication

d


● Deep Groove Ball Bearings Dynamic equivalent radial load Pr=XFr+YFa Fa Fa fo・Fa ≦e Fr Fr >e e Cor X Y X Y 0.172 0.19 2.30 0.345 0.22 1.99 0.689 0.26 1.71 1.03 0.28 1.55 0 0.56 1.45 1.38 0.30 1 2.07 0.34 1.31 3.45 0.38 1.15 5.17 0.42 1.04 6.89 0.44 1.00 Static equivalent radial load Por=0.6Fr+0.5Fa When Por<Fr use Por=Fr

Abutment and fillet dimensions mm

Mass kg

da

Da

ras

min

max

max

(approx.)

473 476

567 604

2.5 3

34.8 62.2

493 500

587 630

2.5 4

36.2 73.0

513 520

607 650

2.5 4

37.5 75.5

543

637

2.5

39.5

573

667

2.5

41.5

613

717

2.5

51.7

B-25


● Expansion Compensating Bearings B r r φD

φd

Open type

Shielded type (ZZ)

Non-contact sealed type (LLB)

d 10 ∼ 50mm Boundary dimensions

Basic load ratings dynamic static dynamic static

Contact sealed type (LLU)

d

D

B

rs min2)

Cr

Cor

Cr

Cor

Allowable Factor Limiting speeds load min-1 kN kgf grease oil open type open type Cp Cp fo ZZ,LLB Z,LB LU,LLU

10

26 30 35

8 9 11

0.3 0.6 0.6

4.55 5.10 8.20

1.96 2.39 3.50

465 520 835

200 244 355

1.65 2.39 3.45

168 244 355

12.4 29 000 13.2 25 000 11.4 23 000

34 000 30 000 27 000

21 000 18 000 16 000

EC-6000 EC-6200 EC-6300

ZZ ZZ ZZ

LLB LLB LLB

LLU LLU LLU

12

28 32 37

8 10 12

0.3 0.6 1

5.10 6.10 9.70

2.39 2.75 4.20

520 620 990

244 280 425

1.78 2.29 3.65

181 233 375

13.2 26 000 12.7 22 000 11.1 20 000

30 000 26 000 24 000

18 000 16 000 15 000

EC-6001 EC-6201 EC-6301

ZZ ZZ ZZ

LLB LLB LLB

LLU LLU LLU

15

32 35 42

9 11 13

0.3 0.6 1

5.60 7.75 11.4

2.83 570 3.60 790 5.45 1 170

289 365 555

2.83 2.78 4.40

289 284 450

13.9 22 000 12.7 19 000 12.3 17 000

26 000 23 000 21 000

15 000 15 000 12 000

EC-6002 EC-6202 EC-6302

ZZ ZZ ZZ

LLB LLB LLB

LLU LLU LLU

17

35 40 47

10 12 14

0.3 0.6 1

6.80 9.60 13.5

3.35 695 4.60 980 6.55 1 380

345 465 665

2.88 3.45 6.55

294 350 665

13.6 20 000 12.8 18 000 12.2 16 000

24 000 21 000 19 000

14 000 12 000 11 000

EC-6003 EC-6203 EC-6303

ZZ ZZ ZZ

LLB LLB LLB

LLU LLU LLU

20

42 47 52

12 14 15

0.6 1 1.1

9.40 12.8 15.9

5.05 955 6.65 1 310 7.90 1 620

515 680 805

5.05 5.05 7.90

515 515 805

13.9 18 000 13.2 16 000 12.4 14 000

21 000 18 000 17 000

11 000 10 000 10 000

EC-6004 EC-6204 EC-6304

ZZ ZZ ZZ

LLB LLB LLB

LLU LLU LLU

25

47 52 62

12 15 17

0.6 1 1.1

10.1 14.0 21.2

5.85 1 030 7.85 1 430 10.9 2 160

595 5.85 595 800 6.55 665 1 110 10.9 1 110

14.5 15 000 13.9 13 000 12.6 12 000

18 000 15 000 14 000

9 400 8 900 8 100

EC-6005 EC-6205 EC-6305

ZZ ZZ ZZ

LLB LLB LLB

LLU LLU LLU

30

55 62 72

13 16 19

1 1 1.1

13.2 19.5 26.7

8.30 1 350 11.3 1 980 15.0 2 720

845 8.30 845 1 150 9.85 1 000 1 530 15.0 1 530

14.8 13 000 13.8 11 000 13.3 10 000

15 000 13 000 12 000

7 700 7 300 6 600

EC-6006 EC-6206 EC-6306

ZZ ZZ ZZ

LLB LLB LLB

LLU LLU LLU

35

62 72 80

14 17 21

1 1.1 1.5

16.0 25.7 33.5

10.3 15.3 19.1

1 630 2 620 3 400

1 050 10.3 1 560 14.5 1 950 18.5

1 050 1 480 1 890

14.8 12 000 13.8 9 800 13.1 8 800

14 000 11 000 10 000

6 800 6 300 6 000

EC-6007 EC-6207 EC-6307

ZZ ZZ ZZ

LLB LLB LLB

LLU LLU LLU

40

68 80 90

15 18 23

1 1.1 1.5

16.8 29.1 40.5

11.5 17.8 24.0

1 710 2 970 4 150

1 170 11.5 1 820 17.5 2 450 23.4

1 170 1 780 2 380

15.2 10 000 14.0 8 700 13.2 7 800

12 000 10 000 9 200

6 100 5 600 5 300

EC-6008 EC-6208 EC-6308

ZZ ZZ ZZ

LLB LLB LLB

LLU LLU LLU

45

75 85 100

16 19 25

1 1.1 1.5

21.0 32.5 53.0

15.1 20.4 32.0

2 140 3 350 5 400

1 540 15.1 2 080 20.3 3 250 27.4

1 540 2 070 2 790

15.3 14.1 13.1

9 200 7 800 7 000

11 000 9 200 8 200

5 400 5 200 4 700

EC-6009 EC-6209 EC-6309

ZZ ZZ ZZ

LLB LLB LLB

LLU LLU LLU

50

80 90 110

16 20 27

1 1.1 2

21.8 35.0 62.0

16.6 23.2 38.5

2 230 3 600 6 300

1 690 16.6 2 370 17.7 3 900 33.0

1 690 1 810 3 350

15.5 14.4 13.2

8 400 7 100 6 400

9 800 8 300 7 500

5 000 4 700 4 200

EC-6010 EC-6210 EC-6310

ZZ ZZ ZZ

LLB LLB LLB

LLU LLU LLU

mm

kN

kgf

Bearing numbers non-1) contact contact open shielded1)sealed sealed type type type type

1)This bearing number is for double sealed and double shielded type bearings, but single sealed and single shielded type are also available. 2)Smallest allowable dimension for chamfer dimension r.

B-26


● Expansion Compensating Bearings ra

ra φDa

φda

Dynamic equivalent radial load Pr=XFr+YFa Fa Fa fo・Fa ≦e Fr Fr >e e Cor X Y X Y 0.172 0.19 2.30 0.345 0.22 1.99 0.689 0.26 1.71 1.03 0.28 1.55 0 0.56 1.45 1.38 0.30 1 2.07 0.34 1.31 3.45 0.38 1.15 5.17 0.42 1.04 6.89 0.44 1.00 Static equivalent radial load Por=0.6Fr+0.5Fa When Por<Fr use Por=Fr

Abutment and fillet dimensions mm

Mass kg

Da

ras

open type

min

max3)

max

max

(approx.)

12 14 14

13.5 16 17

24 26 31

0.3 0.6 0.6

0.019 0.031 0.051

14 16 17

16 17.5 18.5

26 28 32

0.3 0.6 1

0.021 0.036 0.058

17 19 20

19 20.5 23

30 31 37

0.3 0.6 1

0.029 0.043 0.079

19 21 22

21 23 25

33 36 42

0.3 0.6 1

0.037 0.062 0.11

24 25 26.5

26 28 28.5

38 42 45.5

0.6 1 1

0.066 0.101 0.139

29 30 31.5

30.5 32 35

43 47 55.5

0.6 1 1

0.075 0.122 0.223

35 35 36.5

37 39 43

50 57 65.5

1 1 1

0.11 0.191 0.334

40 41.5 43

42 45 47

57 65.5 72

1 1 1.5

0.148 0.277 0.44

45 46.5 48

47 51 54

63 73.5 82

1 1 1.5

0.183 0.352 0.609

50 51.5 53

52.5 55.5 61.5

70 78.5 92

1 1 1.5

0.233 0.391 0.80

55 56.5 59

57.5 60 68.5

75 83.5 101

1 1 2

0.246 0.444 1.03

da

3)This dimension applies to sealed and shielded bearings.

B-27


● AC Bearings B r r φD

φd

Open type

Shielded type (ZZ)

Non-contact sealed type (LLB)

d 10 ∼ 45mm Boundary dimensions

Basic load ratings dynamic static dynamic static

Contact sealed type (LLU)

d

D

B

rs min2)

Cr

Cor

Cr

Cor

Allowable Factor Limiting speeds load min-1 kN kgf grease oil open type open type Cp Cp fo ZZ,LLB Z,LB LU,LLU

10

26 30 35

8 9 11

0.3 0.6 0.6

4.55 5.10 8.20

1.96 2.39 3.50

465 520 835

200 244 355

1.53 2.39 2.98

156 244 305

12.4 29 000 13.2 25 000 11.4 23 000

34 000 30 000 27 000

21 000 18 000 16 000

AC-6000 AC-6200 AC-6300

ZZ ZZ ZZ

LLB LLB LLB

LLU LLU LLU

12

28 32 37

8 10 12

0.3 0.6 1

5.10 6.10 9.70

2.39 2.75 4.20

520 620 990

244 280 425

1.73 2.75 3.00

177 280 310

13.2 26 000 12.7 22 000 11.1 20 000

30 000 26 000 24 000

18 000 16 000 15 000

AC-6001 AC-6201 AC-6301

ZZ ZZ ZZ

LLB LLB LLB

LLU LLU LLU

15

32 35 42

9 11 13

0.3 0.6 1

5.60 7.75 11.4

2.83 570 3.60 790 5.45 1 170

289 365 555

2.43 2.71 3.90

247 277 400

13.9 22 000 12.7 19 000 12.3 17 000

26 000 23 000 21 000

15 000 15 000 12 000

AC-6002 AC-6202 AC-6302

ZZ ZZ ZZ

LLB LLB LLB

LLU LLU LLU

17

35 40 47

10 12 14

0.3 0.6 1

6.80 9.60 13.5

3.35 695 4.60 980 6.55 1 380

345 465 665

2.44 3.50 5.10

249 355 520

13.6 20 000 12.8 18 000 12.2 16 000

24 000 21 000 19 000

14 000 12 000 11 000

AC-6003 AC-6203 AC-6303

ZZ ZZ ZZ

LLB LLB LLB

LLU LLU LLU

20

42 47 52

12 14 15

0.6 1 1.1

9.40 12.8 15.9

5.05 955 6.65 1 310 7.90 1 620

515 680 805

3.80 4.20 5.40

385 430 550

13.9 18 000 13.2 16 000 12.4 14 000

21 000 18 000 17 000

11 000 10 000 10 000

AC-6004 AC-6204 AC-6304

ZZ ZZ ZZ

LLB LLB LLB

LLU LLU LLU

25

47 52 62

12 15 17

0.6 1 1.1

10.1 14.0 21.2

5.85 1 030 7.85 1 430 10.9 2 160

595 800 1 110

4.50 5.80 7.30

460 590 745

14.5 15 000 13.9 13 000 12.6 12 000

18 000 15 000 14 000

9 400 8 900 8 100

AC-6005 AC-6205 AC-6305

ZZ ZZ ZZ

LLB LLB LLB

LLU LLU LLU

30

55 62 72

13 16 19

1 1 1.1

13.2 19.5 26.7

8.30 1 350 11.3 1 980 15.0 2 720

845 6.85 695 1 150 7.55 770 1 530 11.0 1 120

14.8 13 000 13.8 11 000 13.3 10 000

15 000 13 000 12 000

7 700 7 300 6 600

AC-6006 AC-6206 AC-6306

ZZ ZZ ZZ

LLB LLB LLB

LLU LLU LLU

35

62 72 80

14 17 21

1 1.1 1.5

16.0 25.7 33.5

10.3 15.3 19.1

1 630 2 620 3 400

1 050 8.95 910 1 560 9.65 985 1 950 13.4 1 360

14.8 12 000 13.8 9 800 13.1 8 800

14 000 11 000 10 000

6 800 6 300 6 000

AC-6007 AC-6207 AC-6307

ZZ ZZ ZZ

LLB LLB LLB

LLU LLU LLU

40

80 90

18 23

1.1 1.5

29.1 40.5

17.8 24.0

2 970 4 150

1 820 11.6 2 450 16.6

1 190 1 690

14.0 13.2

8 700 7 800

10 000 9 200

5 600 5 300

AC-6208 AC-6308

ZZ ZZ

LLB LLB

LLU LLU

45

85 100

19 25

1.1 1.5

32.5 53.0

20.4 32.0

3 350 5 400

2 080 14.7 3 250 21.8

1 500 2 200

14.1 13.1

7 800 7 000

9 200 8 200

5 200 4 700

AC-6209 AC-6309

ZZ ZZ

LLB LLB

LLU LLU

mm

kN

kgf

Bearing numbers non-1) contact contact open shielded1)sealed sealed type type type type

1)This bearing number is for double sealed and double shielded type bearings, but single sealed and single shielded type are also available. 2)Smallest allowable dimension for chamfer dimension r.

B-28


● AC Bearings ra

ra φDa

φda

Dynamic equivalent radial load Pr=XFr+YFa Fa Fa fo・Fa ≦e Fr Fr >e e Cor X Y X Y 0.172 0.19 2.30 0.345 0.22 1.99 0.689 0.26 1.71 1.03 0.28 1.55 0 0.56 1.45 1.38 0.30 1 2.07 0.34 1.31 3.45 0.38 1.15 5.17 0.42 1.04 6.89 0.44 1.00 Static equivalent radial load Por=0.6Fr+0.5Fa When Por<Fr use Por=Fr

Abutment and fillet dimensions mm

Mass kg

Da

ras

open type

min

max3)

max

max

(approx.)

12 14 14

13.5 16 17

24 26 31

0.3 0.6 0.6

0.019 0.031 0.051

14 16 17

16 17.5 18.5

26 28 32

0.3 0.6 1

0.021 0.036 0.058

17 19 20

19 20.5 23

30 31 37

0.3 0.6 1

0.029 0.043 0.079

19 21 22

21 23 25

33 36 42

0.3 0.6 1

0.037 0.062 0.11

24 25 26.5

26 28 28.5

38 42 45.5

0.6 1 1

0.066 0.101 0.139

29 30 31.5

30.5 32 35

43 47 55.5

0.6 1 1

0.075 0.122 0.223

35 35 36.5

37 39 43

50 57 65.5

1 1 1

0.11 0.191 0.334

40 41.5 43

42 45 47

57 65.5 72

1 1 1.5

0.148 0.277 0.44

46.5 48

51 54

73.5 82

1 1.5

0.352 0.609

51.5 53

55.5 61.5

78.5 92

1 1.5

0.391 0.80

da

3)This dimension applies to sealed and shielded bearings.

B-29


●Miniature and Extra Small Bearings

Open type

Shielded type

Shielded type with snap ring

1. Design features and special characteristics The dimensional range of miniature and extra small ball bearings is given in Table 1. Boundary dimensions for both metric and inch systems are in accordance with the internationally specified ISO and ANSI/ABMA standards. The most widely used sealed and shielded type ball bearings have a 1–2 mm wider width dimension than open type bearings. The main variations of these bearings are shown in Table 2. Bearings with snap rings, which simplify the bearing housing construction and design, have also been serialized and are listed in dimension tables. Among the most generally used sealed and shielded bearings are standard ZZ and ZZA type which incorporate non-contact steel shield plates. Diagram 1 also shows non-contact type rubber sealed LLB and resin sealed SSA type bearings, and the contact-type rubber sealed LLU bearing.

Table 1 Dimensional range Bearing

Dimensional range

Miniature ball bearings

Nominal outer diameter D<9mm

Extra small ball bearings

Nominal bore diameter d<10mm Nominal outer diameter D≧9mm

Rubber sealed (non-contact type) LLB

Rubber sealed (contact type) LLU

Resin sealed (non-contact type) SSA

Diagram 1.

Table 2 Main types and construction Standard type code Type

Open type

Shielded type

Construction

Metric series

6 BC

6 X X ZZ W 6 X X ZZ WBC X X X ZZ

Flange-attached type code Inch series

Construction

Metric series

Inch series

R

FL6 FLBC

FLR

RA X X ZZ

FL 6 X X X ZZ FLW 6 X X X ZZ FLWBC X X ZZ

FLRA X X ZZ

Note: 1. Representative type codes are shown. For further details, please refer to dimension tables. 2. May change to ZA or SA for shielded type bearings, according to the bearing number.

B-31


●Miniature and Extra Small Bearings

2. Standard cage types

3. Dimensional and rotational accuracy

Pressed cage are standard for these bearings. However, molded resin cage are used for some bearings depending on the application.

The accuracy of miniature and extra small ball bearings complies with JIS standards. Accuracy standards are listed in the Bearings Tolerances clause on page A-35. Flange accuracies are listed in Table 3.

Table 3 Tolerance and tolerance values for outer ring flange

Accuracy class

Outer diameter dimensional tolerance ∆D1S or ∆D2S Upper Lower

Class 0 Class 6 ISO standard

Class 5 Class 4

* (see table below)

Class 2

Units Outer ring surface runout for rear surface SD1 Max.

Back face axial runout

Width dimension tolerance

Width unevenness

Sea1 Max.

∆C1S or ∆C2S Upper Lower

VC1S or VC2S Max.

8

11

4

7

1.5

31 4

1 Nominal outer diameter, 18 mm or less.

Units Flange nominal outer diameter D1 or D2 mm over incl.

μm

Outer diameter dimensional tolerance ∆D1S or ∆D2S Upper

Lower

10

+220

−36

10

18

+270

−43

18

30

+330

−52

30

50

+390

−62

μm

B-32

Identical to same bearing's inner ring VBS Identical to same bearing's inner ring VBS

5 2.5 1.5


●Miniature and Extra Small Bearings

4. Radial internal clearance Radial internal clearance values should be applied as listed in the table regarding the Bearing Internal Clearance and Preload clause on page A-58. However, for miniature and extra small bearings, the radial clearance values for high precision bearings given in Table 4

are applied in many cases. For more specific selection information, please refer to the NTN Miniature and Extra Small Ball Bearings Catalog, or contact NTN Engineering.

Table 4 Radial internal clearance for high precision bearings MIL Standard Code Internal clearance

Tight C2S Min.

Max.

5 0    

Units

Standard CNS

Min.

Max.

3    8

CNM Min.

Max.

5     10

CNL Min.

Max.

8    13

Loose C3S Min.

Max.

10    15

Note: 1. These standards are specified in accordance with MIL B-23063. However, NTN codes are shown. 2. Clearance values do not include compensation for measuring load.

B-33

C3M Min.

Max.

13    20

μm

Extra Loose C3L Min.

Max.

20    28


● Miniature and Extra Small Ball Bearings Metric series B B

B1

B1 C1

B1

C2

r

r

r

r φD

φd

φD

Open type

With single shield (Z)

With double shield (ZZ)

φdφD1

Open type with flange (FL)

φD2

With flanged outer ring and single shield (FL…Z)

d 1.5 ∼ 5mm Boundary dimensions

Basic load ratings dynamic static dynamic static N kgf

mm 1) s min

Factor

Limiting speeds min-1

fo

grease

oil

3.00 5.00 9.00

13.6 13.3 12.3

88 000 79 000 71 000

100 000 93 000 84 000

11.0 17.0 17.0 28.0 28.0 40.0 39.0

4.00 5.00 5.00 9.00 9.00 12.0 13.0

14.8 13.3 13.3 12.8 12.8 11.9 12.4

83 000 74 000 74 000 67 000 67 000 59 000 62 000

98 000 87 000 87 000 79 000 79 000 70 000 73 000

59.0 73.0 96.0 96.0 152 174

16.0 21.0 29.0 29.0 44.0 56.0

6.00 7.50 10.0 10.0 16.0 18.0

15.0 14.2 13.8 13.8 13.2 11.5

70 000 65 000 59 000 59 000 56 000 56 000

82 000 76 000 70 000 70 000 66 000 66 000

242 390 560 560 635 635 640

94.0 130 180 180 219 219 224

25.0 40.0 57.0 57.0 65.0 65.0 65.0

9.50 13.0 18.0 18.0 22.0 22.0 23.0

14.7 13.0 11.9 11.9 12.4 12.4 12.7

60 000 58 000 54 000 54 000 50 000 50 000 50 000

71 000 68 000 63 000 63 000 59 000 59 000 58 000

0.08 0.08 0.15 0.15 0.15 0.2 0.2 0.3

222 395 640 650 715 970 1 310 1 760

88.0 140 224 235 276 360 490 680

23.0 40.0 65.0 66.0 73.0 99.0 134 179

9.00 14.0 23.0 24.0 28.0 36.0 50.0 69.0

15.3 13.9 12.7 13.3 13.7 12.8 12.4 12.4

54 000 52 000 49 000 46 000 45 000 43 000 42 000 37 000

63 000 61 000 57 000 55 000 52 000 51 000 49 000 44 000

0.08 0.15 0.15

217 500 715

91.0 211 276

22.0 51.0 73.0

9.50 21.0 28.0

15.8 14.6 13.7

49 000 46 000 45 000

57 000 55 000 52 000

d

D

B

B1

D1

D2

C1

C2

r

Cr

1.5

4 5 6

1.2 2 2.5

2 2.6 3

5 6.5 7.5

5 6.5 7.5

0.4 0.6 0.6

0.6 0.8 0.8

0.15 0.15 0.15

102 171 274

29.0 51.0 86.0

10.0 17.0 28.0

2

4 5 5 6 6 7 7

1.2 1.5 2 2.3 2.5 2.5 2.8

― 2.3 2.5 3 ― ― 3.5

― 6.1 ― 7.5 7.2 ― 8.5

― 6.1 ― 7.5 ― ― 8.5

― 0.5 ― 0.6 0.6 ― 0.7

― 0.6 ― 0.8 ― ― 0.9

0.05 0.08 0.1 0.15 0.15 0.15 0.15

104 171 171 279 279 390 380

37.0 51.0 51.0 89.0 89.0 120 125

2.5

5 6 7 7 8 8

1.5 1.8 ― 2.5 2.5 2.8

2.3 2.6 3 3.5 2.8 4

― 7.1 ― 8.5 9.2 9.5

― 7.1 8.2 8.5 ― 9.5

― 0.5 ― 0.7 0.6 0.7

― 0.8 0.6 0.9 ― 0.9

0.08 0.08 0.15 0.15 0.15 0.15

153 209 284 284 430 550

3

6 7 8 8 9 9 10

2 2 2.5 3 2.5 3 4

2.5 3 ― 4 4 5 4

7.2 8.1 9.2 9.5 10.2 10.5 11.5

7.2 8.1 ― 9.5 10.6 10.5 11.5

0.6 0.5 0.6 0.7 0.6 0.7 1

0.6 0.8 ― 0.9 0.8 1 1

0.08 0.1 0.15 0.15 0.15 0.15 0.15

4

7 8 9 10 11 12 13 16

2 2 2.5 3 4 4 5 5

2.5 3 4 4 4 4 5 5

8.2 9.2 10.3 11.2 12.5 13.5 15 ―

8.2 9.2 10.3 11.6 12.5 13.5 15 ―

0.6 0.6 0.6 0.6 1 1 1 ―

0.6 0.6 1 0.8 1 1 1 ―

5

8 9 10

2 2.5 3

2.5 3 4

9.2 10.2 11.2

9.2 10.2 11.6

0.6 0.6 0.6

0.6 0.6 0.8

1)Smallest allowable dimension for chamfer dimension r.

B-34

Cor

Cr

Cor


● Miniature and Extra Small Ball Bearings

Dynamic equivalent radial load Pr=XFr+YFa Fa Fa fo・Fa ≦e Fr Fr >e e Cor X Y X Y 0.172 0.19 2.30 0.345 0.22 1.99 0.689 0.26 1.71 1.03 0.28 1.55 0 0.56 1.45 1.38 0.30 1 1.31 2.07 0.34 3.45 0.38 1.15 5.17 0.42 1.04 1.00 6.89 0.44 Static equivalent radial load Por=0.6Fr+0.5Fa

B1 C2 ra ra

ra φD2

φda φda

φDa

With flanged outer ring and double shield (FL…ZZ)

When Por<Fr use Por=Fr

Bearing numbers open

with single shield

with double unsealed type shield

with flange

Abutment and fillet dimensions mm with flanged OR and with flanged OR and da Da ras single shield

double shield

min

Mass (approx.) g unsealed type

max2)

max

max

open

with flange

68/1.5 69/1.5A 60/1.5

W68/1.5SA W69/1.5ASA W60/1.5ZA

SSA SSA ZZA

FL68/1.5 FL69/1.5A FL60/1.5

FLW68/1.5SA FLW69/1.5ASA FLW60/1.5ZA

SSA SSA ZZA

2.3 2.7 2.7

2.4 2.9 3.0

3.2 3.8 4.8

0.05 0.15 0.15

0.07 0.18 0.35

0.09 0.24 0.42

672 682 BC2-5 692 BC2-6 BC2-7A 602

  ― W682SA WBC2-5SA W692SA   ―   ― W602ZA

― SSA SSA SSA ― ― ZZA

  ― FL682   ― FL692 FLBC2-6   ― FL602

   ― FLW682SA    ― FLW692SA    ―    ― FLW602ZA

― SSA ― SSA ― ― ZZA

2.5 2.8 2.8 3.2 3.2 3.2 3.2

2.6 2.9 2.9 3.3 3.3 3.6 3.7

3.5 4.2 4.2 4.8 4.8 5.8 5.8

0.05 0.08 0.10 0.15 0.15 0.15 0.15

0.06 0.13 0.16 0.31 0.32 0.44 0.54

― 0.17 ― 0.38 0.38 ― 0.64

67/2.5 68/2.5  ― 69/2.5 BC2.5-8 60/2.5

W67/2.5ZA W68/2.5ZA WBC2.5-7ZA W69/2.5SA WBC2.5-8ZA W60/2.5ZA

ZZA ZZA ZZA SSA ZZA ZZA

  ― FL68/2.5   ― FL69/2.5 FLBC2.5-8 FL60/2.5

   ― FLW68/2.5ZA FLWBC2.5-7ZA FLW69/2.5SA    ― FLW60/2.5ZA

― ZZA ZZA SSA ― ZZA

3.1 3.1 3.7 3.7 3.7 3.7

3.3 3.6 4.0 4.0 4.3 4.1

4.4 4.8 5.8 5.8 6.8 6.8

0.08 0.08 0.15 0.15 0.15 0.15

0.11 0.22 0.63) 0.43 0.57 0.72

― 0.26 0.673) 0.53 0.65 0.83

673 683 BC3-8 693 BC3-9 603 623

WA673SA W683ZA   ― W693Z WBC3-9ZA W603Z 623Z

SSA ZZA ― ZZ ZZA ZZ ZZ

FL673 FL683 FLBC3-8 FL693 FLBC3-9 FL603 FL623

FLWA673SA FLW683ZA    ― FLW693Z FLAWBC3-9ZA FLW603Z FL623Z

SSA ZZA ― ZZ ZZA ZZ ZZ

3.6 3.9 4.2 4.2 4.2 4.2 4.2

4.1 4.1 4.4 4.4 5.0 5.0 5.2

5.4 5.8 6.8 6.8 7.8 7.8 8.8

0.08 0.1 0.15 0.15 0.15 0.15 0.15

0.2 0.33 0.52 0.61 0.71 0.92 1.6

0.26 0.38 0.6 0.72 0.79 1 1.8

674A BC4-8 684AX50 BC4-10 694 604 624 634

WA674ASA WBC4-8Z W684AX50Z WBC4-10Z 694Z 604Z 624Z 634Z

SSA ZZ ZZ ZZ ZZ ZZ ZZ ZZ

FL674A FLBC4-8 FL684AX50 FLBC4-10 FL694 FL604 FL624   ―

FLWA674ASA FLWBC4-8Z FLW684AX50Z FLAWBC4-10Z FL694Z FL604Z FL624Z    ―

SSA ZZ ZZ ZZ ZZ ZZ ZZ ―

4.6 4.8 5.0 5.2 5.2 5.6 5.6 6

5.0 5.0 5.2 6.0 6.4 6.6 6.2 7.6

6.4 6.8 7.8 8.8 9.8 10.4 11.4 14

0.08 0.08 0.1 0.15 0.15 0.2 0.2 0.3

0.28 0.38 0.67 1 1.8 2.1 3.2 5.1

0.35 0.46 0.76 1.1 2 2.3 3.5 ―

675 BC5-9 BC5-10

WA675Z WBC5-9Z WBC5-10Z

ZZ ZZ ZZ

FL675 FLBC5-9 FLBC5-10

FLWA675Z FLWBC5-9Z FLAWBC5-10Z

ZZ ZZ ZZ

5.6 5.2 6.2

6.0 6.1 6.4

7.4 7.8 8.8

0.08 0.15 0.15

0.32 0.55 0.88

0.4 0.63 0.97

2)This dimension applies to sealed and shielded bearings. 3)Values for double shielded bearings shown.

B-35


● Miniature and Extra Small Ball Bearings

B B

B1

B1 C1

B1

C2

r

r

r

r φD

φd

φD

Open type

With single shield (Z)

With double shield (ZZ)

φdφD1

Open type with flange (FL)

φD2

With flanged outer ring and single shield (FL…Z)

d 5 ∼ 9mm Boundary dimensions

Basic load ratings dynamic static dynamic static N kgf

mm d

D

5

11 11 13 13 14 16 19

6

10 12 13 15 16 17 19

B

Limiting speeds min-1

Cr

Cor

fo

grease

oil

282 282 430 430 505 680 885

73.0 73.0 110 110 135 179 238

29.0 29.0 44.0 44.0 52.0 69.0 90.0

14.0 14.0 13.4 13.4 12.8 12.4 12.1

43 000 43 000 40 000 40 000 39 000 37 000 34 000

51 000 51 000 47 000 47 000 46 000 44 000 40 000

196 365 440 530 695 865 885

47.0 85.0 110 137 181 224 238

20.0 37.0 45.0 54.0 71.0 88.0 90.0

15.2 14.5 13.7 13.3 12.7 12.3 12.1

43 000 40 000 39 000 37 000 36 000 35 000 34 000

51 000 47 000 46 000 44 000 42 000 42 000 40 000

0.1 0.15 0.15 0.3 0.3 0.3

555 269 825 375 1 170 505 1 610 715 2 240 910 3 350 1 400

56.0 84.0 120 164 228 340

27.0 38.0 51.0 73.0 93.0 142

15.6 14.9 14.0 14.0 12.9 12.5

40 000 38 000 37 000 35 000 34 000 32 000

47 000 45 000 44 000 41 000 40 000 37 000

0.8 0.8 1.1 1.5 1.5 ―

0.1 0.15 0.2 0.3 0.3 0.3

515 252 820 385 1 610 715 1 990 865 3 350 1 400 4 000 1 590

52.0 84.0 164 202 340 410

26.0 39.0 73.0 88.0 142 162

15.9 15.2 14.0 13.8 12.5 11.7

38 000 36 000 35 000 33 000 32 000 31 000

45 000 43 000 41 000 39 000 37 000 36 000

― 1.1 ― ― ―

0.1 0.2 0.3 0.3 0.6

920 465 1 720 820 2 480 1 090 3 400 1 450 4 550 1 960

94.0 176 253 345 465

48.0 83.0 111 148 200

15.5 14.4 13.5 12.9 12.4

36 000 33 000 32 000 31 000 30 000

42 000 39 000 38 000 36 000 35 000

D1

D2

C1

C2

4 5 4 5 5 5 6

― 12.5 15 ― 16 18 ―

12.6 12.5 15 15 16 18 ―

― 0.8 1 ― 1 1 ―

0.8 1 1 1 1 1 ―

0.15 0.15 0.2 0.2 0.2 0.3 0.3

715 715 1 080 1 080 1 330 1 760 2 340

2.5 3 3.5 5 6 6 6

3 4 5 5 6 6 6

11.2 13.2 15 17 ― 19 22

11.2 13.6 15 17 ― 19 22

0.6 0.6 1.0 1.2 ― 1.2 1.5

0.6 0.8 1.1 1.2 ― 1.2 1.5

0.1 0.15 0.15 0.2 0.2 0.3 0.3

465 830 1 080 1 350 1 770 2 190 2 340

7

11 13 14 17 19 22

2.5 3 3.5 5 6 7

3 4 5 5 6 7

12.2 14.2 16 19 ― ―

12.2 14.6 16 19 ― ―

0.6 0.6 1 1.2 ― ―

0.6 0.8 1.1 1.2 ― ―

8

12 14 16 19 22 24

2.5 3.5 4 6 7 8

3.5 4 5 6 7 8

13.2 15.6 18 22 25 ―

13.6 15.6 18 22 25 ―

0.6 0.8 1 1.5 1.5 ―

9

14 17 20 24 26

3 4 6 7 8

4.5 5 6 7 8

― 19 ― ― ―

― 19 ― ― ―

― 1 ― ― ―

― 3 4 ― 5 5 6

B1

1) s min

Factor

r

Cr

1)Smallest allowable dimension for chamfer dimension r.

B-36

Cor


● Miniature and Extra Small Ball Bearings

Dynamic equivalent radial load Pr=XFr+YFa Fa Fa fo・Fa ≦e Fr Fr >e e Cor X Y X Y 0.172 0.19 2.30 0.345 0.22 1.99 0.689 0.26 1.71 1.03 0.28 1.55 0 0.56 1.45 1.38 0.30 1 1.31 2.07 0.34 3.45 0.38 1.15 5.17 0.42 1.04 1.00 6.89 0.44 Static equivalent radial load Por=0.6Fr+0.5Fa

B1 C2 ra ra

ra φD2

φda φda

φDa

With flanged outer ring and double shield (FL…ZZ)

When Por<Fr use Por=Fr

Bearing numbers open

with single shield

with double unsealed type shield

with flange

WBC5-11Z W685Z 695Z WBC5-13Z 605Z 625Z 635Z

ZZ ZZ ZZ ZZ ZZ ZZ ZZ

676A BC6-12 686 696 BC6-16A 606 626

WA676AZ WBC6-12Z W686Z 696Z BC6-16AZ 606Z 626Z

677 BC7-13 687A 697 607 627

Abutment and fillet dimensions mm with flanged OR and with flanged OR and da Da ras max2)

single shield

double shield

min

  ― FL685 FL695   ― FL605 FL625   ―

FLWBC5-11Z FLW685Z FL695Z FLWBC5-13Z FL605Z FL625Z    ―

ZZ ZZ ZZ ZZ ZZ ZZ ―

6.2 6.2 6.6 6.6 6.6 7 7

6.8 6.8 6.9 6.9 7.4 7.6 9.5

ZZ ZZ ZZ ZZ ZZ ZZ ZZ

FL676A FLBC6-12 FL686 FL696   ― FL606 FL626

FLWA676AZ FLAWBC6-12Z FLW686Z FL696Z    ― FL606Z FL626Z

ZZ ZZ ZZ ZZ ― ZZ ZZ

6.6 7.2 7.0 7.6 7.6 8 8

WA677Z WBC7-13Z W687AZ 697Z 607Z 627Z

ZZ ZZ ZZ ZZ ZZ ZZ

FL677 FLBC7-13 FL687A FL697   ―   ―

FLWA677Z FLAWBC7-13Z FLW687AZ FL697Z    ―    ―

ZZ ZZ ZZ ZZ ― ―

678A BC8-14 688A 698 608 628

W678AZ WBC8-14Z W688AZ 698Z 608Z 628Z

ZZ ZZ ZZ ZZ ZZ ZZ

FL678A FLBC8-14 FL688A FL698 FL608   ―

FLAW678AZ FLWBC8-14Z FLW688AZ FL698Z FL608Z    ―

679 689 699 609 629X50

W679Z W689Z 699Z 609Z 629X50Z

ZZ ZZ ZZ ZZ ZZ

  ― FL689   −   −   −

   ― FLW689Z    −    −    −

 − 685 695  − 605 625 635

max

open

with flange

9.8 9.8 11.4 11.4 12.4 14 17

0.2 0.15 0.2 0.2 0.2 0.3 0.3

1.83) 1.1 2.4 3.43) 3.5 4.8 8

22) 1.3 2.7 3.73) 3.9 5.2 ―

6.7 7.9 7.2 7.8 8.0 8.6 9.5

9.2 10.8 11.8 13.4 14.4 15 17

0.1 0.15 0.15 0.2 0.2 0.3 0.3

0.65 1.3 1.9 3.8 5.2 6 8.1

0.74 1.4 2.2 4.3 ― 6.5 9.2

7.8 8.2 8.2 9 9 9

8.1 8.9 8.7 10.0 10.4 12.2

10.2 11.8 12.8 15 17 20

0.1 0.67 0.15 1.4 0.15 2.1 0.3 5.2 0.3 8 0.3 13

0.77 1.5 2.4 5.7 ― ―

ZZ ZZ ZZ ZZ ZZ ―

8.8 9.2 9.6 10 10 10

9.1 9.5 10.0 10.6 12.2 12.1

11.2 12.8 14.4 17 20 22

0.1 0.75 0.15 1.8 0.2 3.1 0.3 7.3 0.3 12 0.3 17

0.86 1.9 3.5 8.4 13 ―

― ZZ − − −

9.8 10.6 11 11 13

10.4 10.7 11.6 13.1 13.9

13.2 15.4 18 22 22

0.1 0.2 0.3 0.3 0.3

― 3.6 ― ― ―

2)This dimension applies to sealed and shielded bearings. 3)Values for double shielded bearings shown.

B-37

Mass (approx.) g unsealed type

max

1.4 3.2 8.2 14 20


● Miniature and Extra Small Ball Bearings Inch series B B

B1

B1 C1

B1

C2

r

r

r

r φD

φd

φD

Open type

With single shield (Z)

With double shield (ZZ)

φd φD1

Open type with flange (FL)

φD1

With flanged outer ring and single shield (FL…Z)

d 1.984 ∼ Boundary dimensions

Basic load ratings Factor dynamic static dynamic static N kgf

mm 1)

Limiting speeds min-1

fo

grease

oil

9

12.8

67 000

79 000

13 44

4.5 16

14.8 13.2

73 000 56 000

85 000 66 000

96.0 29 180 57 224 65 224 65 395 117

10 18 23 23 40

13.7 11.9 12.7 12.7 11.7

59 000 54 000 49 000 49 000 43 000

70 000 63 000 58 000 58 000 51 000

335

133

34

14

14.8

51 000

60 000

0.08 0.08 0.3 0.3

395 710 1 310 1 310

143 268 490 490

40 72 134 134

15 27 50 50

14.2 13.3 12.4 12.4

49 000 46 000 41 000 41 000

58 000 55 000 48 000 48 000

0.91 1.14 1.07 ―

0.08 0.13 0.3 0.41

210 830 1 480 2 340

94.0 21 370 84 615 151 885 238

9.5 38 63 90

16.4 14.7 13.6 12.1

43 000 39 000 36 000 34 000

51 000 46 000 43 000 40 000

1.57

0.41

3 300 1 400

142

12.7

31 000

37 000

d

D

B

B1

D1

C1

C2

1.984

6.35

2.38

3.571

7.52

0.58

0.79

2.380

4.762 7.938

1.588 2.779

2.38 3.571

5.94 9.12

0.46 0.58

3.175

6.35 7.938 9.525 9.525 12.7

2.38 2.779 2.779 3.967 4.366

2.779 3.571 3.571 3.967 4.366

7.52 9.12 10.72 11.18 ―

3.967

7.938

2.779

3.175

4.762

7.938 9.525 12.7 12.7

2.779 3.175 3.967 4.978

6.350

9.525 12.7 15.875 19.05

9.525

22.225

rs min

Cr

Cor

Cr

0.08

279

89.0

28

0.79 0.79

0.08 0.13

124 430

42.0 152

0.58 0.58 0.58 0.76 ―

0.79 0.79 0.79 0.76 ―

0.08 0.08 0.13 0.3 0.3

284 560 640 640 1 150

9.12

0.58

0.91

0.08

3.175 3.175 ― 4.978

9.12 10.72 ― 14.35

0.58 0.58 ― 1.07

0.91 0.79 ― 1.07

3.175 3.175 4.978 ―

3.175 4.762 4.978 7.142

10.72 13.89 17.53 ―

0.58 0.58 1.07 ―

7.142

24.61

1)Smallest allowable dimension for chamfer dimension r.

B-38

340

Cor


● Miniature and Extra Small Ball Bearings

Dynamic equivalent radial load Pr=XFr+YFa Fa Fa fo・Fa ≦e Fr Fr >e e Cor X Y X Y 0.172 0.19 2.30 0.345 0.22 1.99 0.689 0.26 1.71 1.03 0.28 1.55 0 0.56 1.45 1.38 0.30 1 1.31 2.07 0.34 3.45 0.38 1.15 5.17 0.42 1.04 1.00 6.89 0.44 Static equivalent radial load Por=0.6Fr+0.5Fa

B1 C2 ra ra

ra φD1

φda φda

Da

With flanged outer ring and double shield (FL…ZZ)

When Por<Fr use Por=Fr

Bearing numbers open

with single

with double unsealed type

Abutment and fillet dimensions mm with flanged OR and with flanged OR and da Da ras

Mass (approx.) g unsealed type

double shield

min

max2)

max

max

open

with flange

FLRA1-4ZA

ZZA

2.8

3.3

5.5

0.08

0.35

0.41

FLR133 FLR1-5

FLRA133ZA FLRA1-5ZA

ZZA ZZA

2.9 3.2

3.1 4.3

4 7.1

0.08 0.1

0.12 0.69

0.16 0.76

ZZA ZZ ZZA ZZA ZZ

FLR144 FLR2-5 FLR2-6 FLR2   ―

FLRA144ZA FLRA2-5Z FLRA2-6ZA FLRA2ZA    ―

ZZA ZZ ZZA ZZA ―

3.9 4 4 4.8 4.8

4.0 4.4 5.2 5.2 5.4

5.5 7 8.7 7.8 11

0.08 0.08 0.1 0.3 0.3

0.27 0.61 0.88 1.3 2.5

0.33 0.68 0.96 1.5 ―

RA155ZA

ZZA

FLR155

FLRA155ZA

ZZA

4.8

5.3

7

0.08

0.54

0.61

R156 R166 R3 RA3

RA156Z R166Z   ― RA3Z

ZZ ZZ ― ZZ

FLR156 FLR166   ― FLRA3

FLRA156Z FLRA166Z    ― FLRA3Z

ZZ ZZ ― ZZ

5.5 5.6 6.4 6.0

5.6 5.9 7.2 6.4

7 8.7 11 11

0.08 0.08 0.3 0.3

0.44 0.8 2.2 2.4

0.51 0.89 ― 2.7

R168A R188 R4  ―

R168AZ RA188ZA R4Z RA4Z

AZZ ZZA ZZ ZZ

  ― FLR188 FLR4   ―

FLRA168AZ FLRA188ZA FLR4Z    ―

ZZ ZZA ZZ ―

7.1 7.2 8 8.4

7.3 8.2 8.6 9.5

8.7 11.8 14.2 17

0.08 0.1 0.3 0.4

0.6 1.6 4.4 112)

 ―

R6Z

ZZ

  ―

FLR6Z

ZZ

11.5

11.9

20.2

0.4

143)

shield

shield

with flange

R1-4

RA1-4ZA

ZZA

FLR1-4

R133 R1-5

RA133ZA RA1-5ZA

ZZA ZZA

R144 R2-5 R2-6 R2 RA2

RA144ZA RA2-5Z RA2-6ZA RA2ZA RA2Z

R155

single shield

2)This dimension applies to sealed and shielded bearings. 3)Values for double shielded bearings shown.

B-39

0.69 1.7 4.8 ― 153)


● Miniature and Extra Small Ball Bearings With Snap Ring Grooves, Snap Rings a f

b rN

r ro

ro r φD φD1

φD2

φd

B Snap ring groove Shielded type (ZZ)

Snap ring Shielded type (ZZ)

d 5 ∼ 12mm Boundary dimensions dynamic mm

Basic load ratings static dynamic static N kgf

Limiting speeds

Bearing numbers

min-1

rNa d

D

B

rs min1)

min

Cr

Cor

Cr

Cor

fo

grease

oil

5

13 14

4 5

0.2 0.2

0.1 0.2

1 080 1 330

430 505

110 135

44 52

13.4 12.8

40 000 39 000

47 000 46 000

6

12 13 15 19

4 5 5 6

0.15 0.15 0.2 0.3

0.1 0.1 0.2 0.3

640 1 080 1 350 2 340

365 440 530 885

65 110 137 238

37 45 54 90

14.5 13.7 13.3 12.1

40 000 39 000 37 000 34 000

47 000 46 000 44 000 40 000

8

16 22

5 7

0.2 0.3

0.1 0.4

1 260 3 350

585 1 400

128 340

60 142

14.6 12.5

35 000 32 000

10

26

8

0.3

0.3

4 550

1 960

465

200

12.4

12

28

8

0.3

0.3

5 100

2 390

520

244

13.2

1)Smallest allowable dimension for chamfer dimension r. Note: " * " mark indicates stainless steel is used.

B-40

with snap ring groove shielded type

SC559ZZN SC571ZZN * F-SC6A06ZZ1N

with snap ring shielded type

ZZNR ZZNR

SC6A04ZZN SC6A17ZZN SC669ZZN

ZZ1NR ZZNR ZZNR ZZNR

41 000 37 000

SC890ZZN SC850ZZN

ZZNR ZZNR

29 000

34 000

SC0039ZZN

ZZNR

26 000

30 000

SC0142ZZN

ZZNR


● Miniature and Extra Small Ball Bearings CY

Dynamic equivalent radial load Pr=XFr+YFa Fa Fa fo・Fa ≦e Fr Fr >e e Cor X Y X Y 0.172 0.19 2.30 0.345 0.22 1.99 0.689 0.26 1.71 1.03 0.28 1.55 0 0.56 1.45 1.38 0.30 1 1.31 2.07 0.34 3.45 0.38 1.15 5.17 0.42 1.04 1.00 6.89 0.44 Static equivalent radial load Por=0.6Fr+0.5Fa

CZ

rNa

ra ra

φDX φDa

φda

When Por<Fr use Por=Fr

Snap ring groove dimensions mm

Snap ring dimensions mm

Abutment and fillet dimensions mm

Mass kg

D1

a

b

ro

D2

f

Da

DX

CY

CZ

ras

rNas with snap ring

max

max

min

max

max

max

min

max

max

(approx.)

max

min

max

max

da

(approx.)

12.15 13.03

0.88 1.28

0.55 0.65

0.2 0.06

15.2 16.13

0.55 0.54

6.6 6.6

6.9 7.4

11.4 12.4

15.9 16.9

1.2 1.6

0.6 0.6

0.2 0.2

0.1 0.2

0.002 0.004

11.15 12.15 14.03 17.9

0.78 1.08 1.03 0.93

0.60 0.55 0.65 0.80

0.02 0.2 0.06 0.2

14.2 15.2 17.2 22.0

0.55 0.55 0.60 0.70

7.2 7.0 7.6 8.0

7.9 7.2 7.8 9.5

10.8 11.8 13.4 17.0

14.9 15.9 17.9 22.8

1.1 1.4 1.4 1.4

0.6 0.6 0.7 0.7

0.15 0.15 0.2 0.3

0.1 0.1 0.2 0.3

0.001 0.002 0.004 0.008

14.95 20.8

0.53 2.35

0.65 0.80

0.05 0.2

18.2 24.8

0.54 0.70

9.6 10.0

10.0 12.7

14.4 20

18.9 25.5

0.9 2.8

0.6 0.7

0.2 0.3

0.1 0.4

0.003 0.013

24.5

2.20

0.90

0.3

28.8

0.85

12

13.5

24

29.5

2.8

0.9

0.3

0.3

0.02

26.44

2.20

0.90

0.3

32.7

0.85

14

16

26

33.4

2.8

0.9

0.3

0.3

0.022

B-41


●Angular Contact Ball Bearings

Angular contact ball bearing

Four-point contact ball bearing

Double row angular contact ball bearing

1. Design features and special characteristics

before being used in an application. Table 2 shows information concerning angular contact ball bearings, and Table 3 shows similar information for duplex angular contact ball bearings.

1.1 Angular contact ball bearing Angular contact ball bearings are non-separable bearings which have a certain contact angle in the radial direction relative to the straight line that runs through the point where each ball makes contact with the inner and outer rings (see Diagram 1). Table 1 gives contact angle and contact angle symbol. In addition to radial loads, single direction axial loads can also be accommodated by angular contact ball bearings. Furthermore, since an axial load is generated from a radial force, these bearings are generally used in pairs facing each other. Standard type, high speed use type and ultra high speed varieties of angular contact ball bearings are available through NTN, and there are also many duplex varieties. A bearing accuracy of JIS Class 5 or higher is applied to duplex type angular contact ball bearings, and in many cases they are given a preload, in compliance with standard preload levels,

Contact angle

Diagram 1. Table 1 Contact angle and contact angle codes Contact angle

15˚

Code

C

30˚ A1

40˚ B

1 Contact angle symbol A is omitted.

Table 2 Angular contact ball bearing types and characteristics Type

Design

Characteristics

Standard type

¡Available in bearing series 79, 70, 72, 72B, 73, and 73B. ¡Contact angles: 30˚and 40˚ (with B) available. ¡Standard bearing cage type differs depending on bearing no. (Refer to Table 4)

Table 3 Duplex angular contact ball bearings ― types and characteristics Duplex type Back-to-back duplex (DB) Face-to face duplex (DF) Tandem duplex (DT)

Characteristics ¡Can accommodate radial loads and axial loads in either direction. ¡Has a large distanceRbetween the acting load center of the bearing, and therefore a large  momentary force load capacity. ¡Allowable misalignment angle is small.

r

r

¡Can accommodate radial loads and axial loads in either direction. ¡Has a smaller distanceRbetween the acting load center of the bearing, and therefore a smaller  momentary force load capacity. ¡Has a larger allowable misalignment angle than back-to-back duplex type. ¡Can accommodate radial loads and single direction axial loads. ¡Axial loads are received by both bearings as a set, and therefore heavy axial loads can be  accommodated.

Note: 1. Duplex bearings are manufactured in a set to specified clearance and preload values, therefore they must be assembled together with identically numbered bearings and not mixed with other arrangements. 2. Triplex arrangements of angular contact bearings are also available. Consult NTN Engineering for details.

B-43


●Angular Contact Ball Bearings

1.2 Four-point angular contact ball bearings Four-point angular contact ball bearings have a contact angle of 30˚ and inner rings which are separated in half. As shown in Diagram 2, when the inner and outer rings receive a radial load the ball bearings contact the inner and outer rings at four points. This construction enables a single bearing to accommodate axial loads from either direction, and when generally under a simple axial load or heavy axial load, the bearing functions in reliance on two contact points like ordinary bearings.

■Flush ground "Flush ground" is the name given to the finishing method shown in Diagram 4 where the offset of the front and back faces of the bearing are ground to the same value. By doing this, a stated clearance or preload value can be achieved by using bearings with identical codes for these values, in other words by combining either DB or DF series bearings. DT series bearings can also be used in various arrangements to achieve uniform load distribution. All BNT type bearings are flush ground, but other angular contact ball bearing series are not. If it is necessary to flush grind any of these other bearings, please consult NTN Engineering. Offset B Back face

Front face

Diagram 2. Offset A

A=B

1.3 Double row angular contact ball bearings Diagram 4.

The structure of double row angular contact ball bearings is designed by arranging two single row angular contact bearings back-to-back in duplex (DB) to form one united bearing with a contact angle of 25˚. These bearings are capable of accommodating radial loads, axial loads in either direction, and have a high capacity for momentary loads as well. As shown in Diagram 3, sealed and shielded type double row angular contact ball bearings are also available. Standard loads vary from those of open type bearings.

Open type

Shielded type (ZZ)

Non-contact sealed type (LLM) Diagram 3.

B-44

Contact sealed type (LLD)


●Angular Contact Ball Bearings

2. Standard cage types Table 4 lists the standard cage types for angular contact ball bearings.

Table 4 Standard cages for angular contact ball bearings Type

Bearing series

Molded resin cage

Pressed cage      ―      ―    7200 ∼7222    7300 ∼7322    7200B∼7222B    7300B∼7322B

Machined cage 7914 ∼ 7960 7026 ∼ 7040 7224 ∼ 7240 7324 ∼ 7340 7224B ∼ 7240B 7324B ∼ 7340B

Standard

79 70 72 73 72B 73B

7904∼7913 7000∼7024 ― ― ― ―

4-point contact

QJ2 QJ3

― ―

― ―

QJ208 ∼ QJ224 QJ306 ∼ QJ324

Double row

52 53

― ―

5200S∼5217S 5302S∼5314S

― ―

Note: Due to the material characteristics of molded resin cages, use at application temperatures in excess of 120˚C is not possible.

B-45


● Single and Duplex Angular Contact Ball Bearings

2B

B r

ra

r1

r1

ra

r

φD

a

a

Single

φda

φDa

φd

a

a

Back-to-back arrangement (DB)

Tandem arrangement (DT)

Face-to-face arrangement (DF)

d 10 ∼ 30mm Boundary dimensions

Basic load ratings dynamic static dynamic static kN kgf

d

D

B

mm 2B

10

26 30 30 35 35

8 9 9 11 11

16 18 18 22 22

0.3 0.6 0.6 0.6 0.6

0.15 0.3 0.3 0.3 0.3

12

28 32 32 37 37

8 10 10 12 12

16 20 20 24 24

0.3 0.6 0.6 1 1

15

32 35 35 42 42

9 11 11 13 13

18 22 22 26 26

17

35 40 40 47 47

10 12 12 14 14

20

42 47 47 52 52

rs min3) rls min3)

Limiting speeds1)

Bearing2) numbers

min-1

Load center

Mass

mm

kg single

a

(approx.)

grease

oil

212 279 257 500 470

29 000 28 000 24 000 26 000 22 000

39 000 37 000 32 000 34 000 29 000

7000 7200 7200B 7300 7300B

9 10.5 13 12 15

0.023 0.029 0.029 0.04 0.041

515 775 775 1 140 1 080

251 405 405 535 505

26 000 25 000 21 000 23 000 19 000

35 000 33 000 28 000 30 000 26 000

7001 7201 7201B 7301 7301B

10 11.5 14 13 16.5

0.025 0.035 0.036 0.044 0.045

3.15 4.70 4.35 7.20 6.65

590 925 855 1 370 1 270

320 480 445 735 680

23 000 22 000 18 000 19 000 17 000

31 000 29 000 25 000 26 000 22 000

7002 7202 7202B 7302 7302B

11.5 12.5 16 15 19

0.035 0.046 0.046 0.055 0.057

7.15 12.0 11.0 15.9 14.8

3.85 6.60 6.10 8.65 8.00

730 1 220 1 120 1 630 1 510

390 675 625 880 820

21 000 19 000 17 000 18 000 15 000

28 000 26 000 22 000 24 000 20 000

7003 7203 7203B 7303 7303B

12.5 14.5 18 16 20.5

0.046 0.064 0.066 0.107 0.109

0.3 0.6 0.6 0.6 0.6

9.70 14.5 13.3 18.7 17.3

5.60 8.40 7.70 10.4 9.65

990 1 480 1 360 1 910 1 770

570 855 785 1 060 985

19 000 17 000 15 000 16 000 13 000

25 000 23 000 20 000 21 000 18 000

7004 7204 7204B 7304 7304B

15 17 21.5 18 22.5

0.08 0.1 0.102 0.138 0.141

0.3 0.6 1 1 1.1 1.1

0.15 0.3 0.6 0.6 0.6 0.6

7.15 10.7 16.2 14.8 26.4 24.4

4.95 6.85 10.3 9.40 15.8 14.6

730 1 100 1 650 1 510 2 690 2 490

505 700 1 050 960 1 610 1 490

17 000 16 000 14 000 12 000 13 000 11 000

22 000 21 000 19 000 16 000 17 000 15 000

7905 7005 7205 7205B 7305 7305B

14 16.5 19 24 21 27

0.05 0.093 0.125 0.129 0.23 0.234

0.3 1

0.15 0.6

7.55 13.9

5.75 9.45

770 1 410

585 965

14 000 13 000

19 000 18 000

7906 7006

15.5 19

0.058 0.135

Cr

Cor

Cr

4.65 5.45 5.00 10.1 9.50

2.07 2.74 2.52 4.95 4.60

470 555 510 1 030 970

0.15 0.3 0.3 0.6 0.6

5.05 7.60 7.00 11.2 10.5

2.46 3.95 3.65 5.25 4.95

0.3 0.6 0.6 1 1

0.15 0.3 0.3 0.6 0.6

5.80 9.05 8.35 13.5 12.5

20 24 24 28 28

0.3 0.6 0.6 1 1

0.15 0.3 0.3 0.6 0.6

12 14 14 15 15

24 28 28 30 30

0.6 1 1 1.1 1.1

25

42 47 52 52 62 62

9 12 15 15 17 17

18 24 30 30 34 34

30

47 55

9 13

18 26

Cor

1)This value achieved with machined cages; when pressed cages are used, 80% of this value is acceptable. 2)Bearing numbers appended with the code "B" have a contact angle of 40˚; bearings with this code have a contact angle of 30˚. 3)Smallest allowable dimension for chamfer dimension r. B-46


● Single and Duplex Angular Contact Ball Bearings

r1 a

Dynamic equivalent radial load Pr=XFr+YFa

ra

Contact angle

ra

r1a

φDb

φDa

φda

Single, DT DB, DF Fa / Fr≦e Fa / Fr>e Fa / Fr≦e Fa / Fr>e X Y X Y X Y X Y

e

30˚ 0.80 40˚ 1.14

φdb

1 1

0 0

0.39 0.76 0.35 0.57

1 1

0.78 0.63 1.24 0.55 0.57 0.93

Static equivalent radial load Por=Xo Fr+Yo Fa Contact angle

30˚ 40˚

Single, DT Xo Yo 0.5 0.5

DB, DF

Xo

0.33 0.26

1 1

Yo 0.66 0.52

For single and DT arrangement, When Por<Fr use Por=Fr

dynamic

Basic load ratings static dynamic static

(duplex)

(duplex)

kN

kgf

Cr

Cor

Cr

Limiting speeds1)

Bearing numbers2)

Abutment and fillet dimensions

(duplex)

min-1

mm da

db

Da

Db

ras

r1as

Cor

grease

oil

DB

DF

DT

min

min

max

max

max

max

7.50 8.80 8.10 16.5 15.4

4.15 5.45 5.05 9.85 9.20

765 900 825 1 680 1 570

425 560 515 1 000 940

23 000 22 000 19 000 20 000 18 000

31 000 30 000 26 000 27 000 24 000

DB DB DB DB DB

DF DF DF DF DF

DT DT DT DT DT

12.5 14.5 14.5 14.5 14.5

12.5 12.5 12.5 12.5 12.5

23.5 25.5 25.5 30.5 30.5

24.8 27.5 27.5 32.5 32.5

0.3 0.6 0.6 0.6 0.6

0.15 0.3 0.3 0.3 0.3

8.20 12.3 11.4 18.2 17.1

4.90 7.95 7.35 10.5 9.90

840 1 260 1 160 1 850 1 750

500 810 750 1 070 1 010

21 000 20 000 17 000 18 000 16 000

28 000 26 000 23 000 24 000 21 000

DB DB DB DB DB

DF DF DF DF DF

DT DT DT DT DT

14.5 16.5 16.5 17.5 17.5

14.5 14.5 14.5 16.5 16.5

25.5 27.5 27.5 31.5 31.5

26.8 29.5 29.5 32.5 32.5

0.3 0.6 0.6 1 1

0.15 0.3 0.3 0.6 0.6

9.40 14.7 13.6 21.9 20.3

6.30 9.40 8.70 14.4 13.3

960 1 500 1 390 2 230 2 070

640 960 885 1 470 1 360

18 000 17 000 15 000 15 000 13 000

24 000 23 000 20 000 21 000 18 000

DB DB DB DB DB

DF DF DF DF DF

DT DT DT DT DT

17.5 19.5 19.5 20.5 20.5

17.5 17.5 17.5 19.5 19.5

29.5 30.5 30.5 36.5 36.5

30.8 32.5 32.5 37.5 37.5

0.3 0.6 0.6 1 1

0.15 0.3 0.3 0.6 0.6

11.6 19.4 17.9 25.9 24.0

7.65 13.2 12.2 17.3 16.0

1 190 1 980 1 830 2 640 2 450

780 1 350 1 250 1 760 1 640

17 000 15 000 13 000 14 000 12 000

22 000 21 000 18 000 19 000 16 000

DB DB DB DB DB

DF DF DF DF DF

DT DT DT DT DT

19.5 21.5 21.5 22.5 22.5

19.5 19.5 19.5 21.5 21.5

32.5 35.5 35.5 41.5 41.5

33.8 37.5 37.5 42.5 42.5

0.3 0.6 0.6 1 1

0.15 0.3 0.3 0.6 0.6

15.8 23.6 21.6 30.5 28.2

11.2 16.8 15.4 20.8 19.3

1 610 2 400 2 200 3 100 2 870

1 140 1 710 1 570 2 130 1 970

15 000 14 000 12 000 12 000 11 000

20 000 18 000 16 000 17 000 14 000

DB DB DB DB DB

DF DF DF DF DF

DT DT DT DT DT

24.5 25.5 25.5 27 27

24.5 24.5 24.5 24.5 24.5

37.5 41.5 41.5 45 45

39.5 42.5 42.5 47.5 47.5

0.6 1 1 1 1

0.3 0.6 0.6 0.6 0.6

11.6 17.5 26.3 24.0 43.0 39.5

9.95 13.7 20.6 18.8 31.5 29.3

1 180 1 780 2 690 2 450 4 400 4 050

1 010 1 400 2 100 1 920 3 250 2 980

13 000 12 000 11 000 10 000 10 000 9 100

18 000 17 000 15 000 13 000 14 000 12 000

DB DB DB DB DB DB

DF DF DF DF DF DF

DT DT DT DT DT DT

27.5 29.5 30.5 30.5 32 32

27.5 29.5 29.5 29.5 29.5 29.5

39.5 42.5 46.5 46.5 55 55

40.8 44.5 47.5 47.5 57.5 57.5

0.3 0.6 1 1 1 1

0.15 0.3 0.6 0.6 0.6 0.6

12.3 22.5

11.5 18.9

1 250 2 300

1 170 1 930

12 000 11 000

15 000 14 000

DB DB

DF DF

DT DT

32.5 35.5

32.5 35.5

44.5 49.5

45.8 50.5

0.3 1

0.15 0.6

Note: For bearing series 79 and 70, inner rings are constructed with groove abutments on both sides. Therefore, the inner ring chamfer dimension r1 is identical to dimension r. Furthermore, the radius r1a of the shaft corner roundness is likewise identical to ra.

B-47


● Single and Duplex Angular Contact Ball Bearings

2B

B r

ra

r1

r1

ra

r

φD

a

a

Single

φda

φDa

φd

a

a

Back-to-back arrangement (DB)

Tandem arrangement (DT)

Face-to-face arrangement (DF)

d 30 ∼ 55mm Boundary dimensions

d

D

B

mm 2B

30

62 62 72 72

16 16 19 19

32 32 38 38

1 1 1.1 1.1

35

55 62 72 72 80 80

10 14 17 17 21 21

20 28 34 34 42 42

40

62 68 80 80 90 90

12 15 18 18 23 23

45

68 75 85 85 100 100

Basic load ratings dynamic static dynamic static kN kgf

rs min3) rls min3)

Limiting speeds1)

Bearing2) numbers

min-1

Load center

Mass

mm

kg single

a

(approx.)

Cr

Cor

grease

oil

14.8 13.5 22.3 20.5

2 300 2 090 3 450 3 150

1 510 1 380 2 280 2 090

12 000 11 000 11 000 9 600

16 000 14 000 15 000 13 000

7206 7206B 7306 7306B

21.5 27.5 24.5 31.5

0.193 0.197 0.345 0.352

12.0 17.5 29.7 27.1 40.0 36.5

8.85 12.6 20.1 18.4 26.3 24.2

1 220 1 790 3 050 2 760 4 050 3 750

905 1 280 2 050 1 870 2 680 2 470

13 000 12 000 11 000 9 300 9 800 8 400

17 000 16 000 14 000 12 000 13 000 11 000

7907 7007 7207 7207B 7307 7307B

18 21 24 31 27 34.5

0.088 0.18 0.281 0.287 0.462 0.469

0.3 0.6 0.6 0.6 1 1

12.7 18.8 35.5 32.0 49.0 45.0

10.2 14.6 25.1 23.0 33.0 30.5

1 290 1 910 3 600 3 250 5 000 4 550

1 040 1 490 2 560 2 340 3 350 3 100

11 000 10 000 9 600 8 300 8 600 7 400

15 000 14 000 13 000 11 000 12 000 9 900

7908 7008 7208 7208B 7308 7308B

20.5 23 26.5 34 30.5 39

0.13 0.222 0.355 0.375 0.625 0.636

0.6 1 1.1 1.1 1.5 1.5

0.3 0.6 0.6 0.6 1 1

15.7 22.3 39.5 36.0 63.5 58.5

12.9 17.7 28.7 26.2 44.0 40.0

1 600 2 270 4 050 3 650 6 450 5 950

1 310 1 800 2 930 2 680 4 500 4 100

10 000 9 500 8 700 7 400 7 800 6 600

14 000 13 000 12 000 9 900 10 000 8 900

7909 7009 7209 7209B 7309 7309B

22.5 25.5 28.5 37 33.5 43.0

0.15 0.282 0.404 0.41 0.837 0.854

24 32 40 40 54 54

0.6 1 1.1 1.1 2 2

0.3 0.6 0.6 0.6 1 1

16.6 23.7 41.5 37.5 74.5 68.0

14.5 20.1 31.5 28.6 52.5 48.0

1 690 2 410 4 200 3 800 7 600 6 950

1 470 2 050 3 200 2 920 5 350 4 950

9 200 8 600 7 900 6 700 7 100 6 000

12 000 11 000 10 000 9 000 9 400 8 100

7910 7010 7210 7210B 7310 7310B

23.5 27 30 39.5 36.5 47

0.157 0.306 0.457 0.466 1.09 1.11

26 36 42 42 58 58

1 1.1 1.5 1.5 2 2

0.6 0.6 1 1 1 1

17.3 31.0 51.0 46.5 86.0 79.0

16.1 26.3 39.5 36.0 61.5 56.5

1 770 3 150 5 200 4 700 8 750 8 050

1 640 2 680 4 050 3 700 6 300 5 800

8 400 7 900 7 100 6 100 6 400 5 500

11 000 11 000 9 500 8 200 8 600 7 300

7911 7011 7211 7211B 7311 7311B

26 30 33 43 40 52

0.214 0.447 0.6 0.612 1.39 1.42

Cr

Cor

0.6 0.6 0.6 0.6

22.5 20.5 33.5 31.0

0.6 1 1.1 1.1 1.5 1.5

0.3 0.6 0.6 0.6 1 1

24 30 36 36 46 46

0.6 1 1.1 1.1 1.5 1.5

12 16 19 19 25 25

24 32 38 38 50 50

50

72 80 90 90 110 110

12 16 20 20 27 27

55

80 90 100 100 120 120

13 18 21 21 29 29

1)This value achieved with machined cages; when pressed cages are used, 80% of this value is acceptable. 2)Bearing numbers appended with the code "B" have a contact angle of 40˚; bearings with this code have a contact angle of 30˚. 3)Smallest allowable dimension for chamfer dimension r or rl. B-48


● Single and Duplex Angular Contact Ball Bearings

r1 a

Dynamic equivalent radial load Pr=XFr+YFa

ra

Contact angle

ra

r1a

φDb

φDa

φda

Single, DT DB, DF Fa / Fr≦e Fa / Fr>e Fa / Fr≦e Fa / Fr>e X Y X Y X Y X Y

e

30˚ 0.80 40˚ 1.14

φdb

1 1

0 0

0.39 0.76 0.35 0.57

1 1

0.78 0.63 1.24 0.55 0.57 0.93

Static equivalent radial load Por=Xo Fr+Yo Fa Contact angle

30˚ 40˚

Single, DT Xo Yo 0.5 0.5

DB, DF

Xo

0.33 0.26

1 1

Yo 0.66 0.52

For single and DT arrangement, When Por<Fr use Por=Fr

dynamic

Basic load ratings static dynamic static

(duplex)

(duplex)

kN

kgf

Limiting speeds1)

Bearing numbers2)

Abutment and fillet dimensions

(duplex)

min-1

mm Db

ras

r1as

oil

DB

DF

DT

min

min

max

max

max

max

9 800 8 600 8 900 7 700

13 000 11 000 12 000 10 000

DB DB DB DB

DF DF DF DF

DT DT DT DT

35.5 35.5 37 37

34.5 34.5 34.5 34.5

56.5 56.5 65 65

57.5 57.5 67.5 67.5

1 1 1 1

0.6 0.6 0.6 0.6

1 810 2 560 4 100 3 750 5 350 4 950

10 000 9 400 8 600 7 500 7 800 6 800

13 000 13 000 11 000 10 000 10 000 9 000

DB DB DB DB DB DB

DF DF DF DF DF DF

DT DT DT DT DT DT

39.5 40.5 42 42 43.5 43.5

39.5 40.5 39.5 39.5 40.5 40.5

50.5 56.5 65 65 71.5 71.5

52.5 57.5 67.5 67.5 74.5 74.5

0.6 1 1 1 1.5 1.5

0.3 0.6 0.6 0.6 1 1

2 100 3 100 5 850 5 300 8 100 7 400

2 080 2 970 5 150 4 700 6 700 6 200

9 000 8 300 7 700 6 700 6 900 6 000

12 000 11 000 10 000 8 900 9 200 8 000

DB DB DB DB DB DB

DF DF DF DF DF DF

DT DT DT DT DT DT

44.5 45.5 47 47 48.5 48.5

44.5 45.5 44.5 44.5 45.5 45.5

57.5 62.5 73.0 73 81.5 81.5

59.5 63.5 75.5 75.5 84.5 84.5

0.6 1 1 1 1.5 1.5

0.3 0.6 0.6 0.6 1 1

25.7 35.5 57.5 52.5 88.0 80.5

2 600 3 700 6 550 5 950 10 500 9 650

2 620 3 600 5 850 5 350 8 950 8 250

8 100 7 500 6 900 6 000 6 200 5 400

11 000 10 000 9 200 8 000 8 200 7 200

DB DB DB DB DB DB

DF DF DF DF DF DF

DT DT DT DT DT DT

49.5 50.5 52 52 53.5 53.5

49.5 50.5 49.5 49.5 50.5 50.5

63.5 69.5 78 78 91.5 91.5

65.5 70.5 80.5 80.5 94.5 94.5

0.6 1 1 1 1.5 1.5

0.3 0.6 0.6 0.6 1 1

27.0 38.5 67.0 60.5 121 111

28.9 40.0 63.0 57.0 105 96.0

2 750 3 900 6 850 6 200 12 300 11 300

2 950 4 100 6 400 5 850 10 700 9 850

7 300 6 800 6 300 5 500 5 600 4 900

9 800 9 100 8 300 7 300 7 500 6 500

DB DB DB DB DB DB

DF DF DF DF DF DF

DT DT DT DT DT DT

54.5 55.5 57 57 60 60

54.5 55.5 54.5 54.5 55.5 55.5

67.5 69.5 74.5 75.5 83 85.5 83 85.5 100 104.5 100 104.5

0.6 1 1 1 2 2

0.3 0.6 0.6 0.6 1 1

28.1 50.5 83.0 75.0 139 128

32.0 52.5 79.0 72.0 123 113

2 870 5 150 8 450 7 650 14 200 13 000

3 300 5 350 8 050 7 350 12 600 11 600

6 700 6 300 5 700 5 000 5 100 4 500

8 900 8 400 7 600 6 600 6 800 5 900

DB DB DB DB DB DB

DF DF DF DF DF DF

DT DT DT DT DT DT

60.5 62 63.5 63.5 65 65

60.5 62 60.5 60.5 60.5 60.5

74.5 75.5 83 85.5 91.5 94.5 91.5 94.5 110 114.5 110 114.5

1 1 1.5 1.5 2 2

0.6 0.6 1 1 1 1

Cr

Cor

Cr

Cor

36.5 33.5 54.5 50.0

29.6 27.1 44.5 41.0

3 750 3 400 5 550 5 100

3 000 2 760 4 550 4 200

19.5 28.5 48.5 44.0 65.0 59.5

17.7 25.1 40.0 36.5 52.5 48.5

1 990 2 900 4 900 4 500 6 600 6 100

20.6 30.5 57.5 52.0 79.5 73.0

20.4 29.2 50.5 46.0 66.0 60.5

25.5 36.0 64.5 58.5 103 95.0

grease

da

db

Da

Note: For bearing series 79 and 70, inner rings are constructed with groove abutments on both sides. Therefore, the inner ring chamfer dimension r1 is identical to dimension r. Furthermore, the radius r1a of the shaft corner roundness is likewise identical to ra.

B-49


● Single and Duplex Angular Contact Ball Bearings

2B

B r

ra

r1

r1

ra

r

φD

a

a

Single

φda

φDa

φd

a

a

Back-to-back arrangement (DB)

Tandem arrangement (DT)

Face-to-face arrangement (DF)

d 60 ∼ 85mm Boundary dimensions

D

B

mm 2B

60

85 95 110 110 130 130

13 18 22 22 31 31

26 36 44 44 62 62

1 1.1 1.5 1.5 2.1 2.1

65

90 100 120 120 140 140

13 18 23 23 33 33

26 36 46 46 66 66

70

100 110 125 125 150 150

16 20 24 24 35 35

75

105 115 130 130 160 160

d

Basic load ratings dynamic static dynamic static kN kgf

rs min3) rls min3)

Limiting speeds1)

Bearing2) numbers

min-1

Load center

Mass

mm

kg single

a

(approx.)

Cor

grease

oil

1 840 3 250 6 300 5 700 10 000 9 200

1 780 2 860 5 000 4 550 7 300 6 700

7 800 7 200 6 600 5 700 5 900 5 100

10 000 9 600 8 800 7 600 7 900 6 800

7912 7012 7212 7212B 7312 7312B

27.5 31.5 36 47.5 43 56

0.23 0.478 0.765 0.78 1.74 1.77

18.0 31.5 58.0 52.5 82.0 75.0

1 860 3 450 7 150 6 500 11 300 10 400

1 840 3 200 5 900 5 350 8 350 7 700

7 200 6 700 6 100 5 200 5 500 4 700

9 600 9 000 8 100 7 000 7 300 6 300

7913 7013 7213 7213B 7313 7313B

29 33 38 50.5 46 59.5

0.245 0.509 0.962 0.981 2.11 2.15

26.2 39.5 63.5 58.0 93.5 86

2 670 4 350 7 800 7 050 12 700 11 700

2 670 4 000 6 500 5 900 9 550 8 800

6 700 6 200 5 700 4 900 5 100 4 400

9 000 8 300 7 600 6 500 6 800 5 800

7914 7014 7214 7214B 7314 7314B

32.5 36 40 53 49.5 63.5

0.397 0.705 1.09 1.11 2.56 2.61

26.50 27.1 43.50 41.5 79.0 68.5 71.5 62.0 136 106 125 97.5

2 710 2 760 4 450 4 250 8 050 7 000 7 300 6 350 13 800 10 800 12 700 9 900

6 300 5 800 5 300 4 500 4 800 4 100

8 400 7 800 7 100 6 000 6 300 5 400

7915 7015 7215 7215B 7315 7315B

34 37.5 42.5 56 52.5 68

0.42 0.745 1.17 1.19 3.07 3.13

0.6 0.6 1 1 1.1 1.1

26.9 53.5 89.0 80.5 147 135

28.0 50.5 76.0 69.5 119 109

2 740 2 860 5 450 5 150 9 100 7 750 8 200 7 050 15 000 12 100 13 800 11 100

5 900 5 500 5 000 4 300 4 500 3 800

7 800 7 300 6 600 5 700 5 900 5 100

7916 7016 7216 7216B 7316 7316B

35.5 40.5 45 59 55.5 72

0.444 0.994 1.39 1.42 3.65 3.72

0.6 0.6 1 1

36.0 54.5 99.5 90.0

38.0 53.5 88.5 80.5

3 700 5 600 10 100 9 150

5 500 5 100 4 700 4 000

7 400 6 900 6 200 5 300

7917 7017 7217 7217B

38.5 42 48 63.5

0.628 1.04 1.78 1.82

Cr

Cor

0.6 0.6 1 1 1.1 1.1

18.1 32.0 61.5 56.0 98.0 90.0

17.4 28.1 49.0 44.5 71.5 66.0

1 1.1 1.5 1.5 2.1 2.1

0.6 0.6 1 1 1.1 1.1

18.3 33.5 70.5 63.5 111 102

32 40 48 48 70 70

1 1.1 1.5 1.5 2.1 2.1

0.6 0.6 1 1 1.1 1.1

26.2 42.5 76.5 69.0 125 114

16 20 25 25 37 37

32 40 50 50 74 74

1 1.1 1.5 1.5 2.1 2.1

0.6 0.6 1 1 1.1 1.1

80

110 125 140 140 170 170

16 22 26 26 39 39

32 44 52 52 78 78

1 1.1 2 2 2.1 2.1

85

120 130 150 150

18 22 28 28

36 44 56 56

1.1 1.1 2 2

Cr

3 850 5 450 9 050 8 200

1)This value achieved with machined cages; when pressed cages are used, 80% of this value is acceptable. 2)Bearing numbers appended with the code "B" have a contact angle of 40˚; bearings with this code have a contact angle of 30˚. 3)Smallest allowable dimension for chamfer dimension r or rl. B-50


● Single and Duplex Angular Contact Ball Bearings

r1 a

Dynamic equivalent radial load Pr=XFr+YFa

ra

Contact angle

ra

r1a

φDb

φDa

φda

Single, DT DB, DF Fa / Fr≦e Fa / Fr>e Fa / Fr≦e Fa / Fr>e X Y X Y X Y X Y

e

30˚ 0.80 40˚ 1.14

φdb

1 1

0 0

0.39 0.76 0.35 0.57

1 1

0.78 0.63 1.24 0.55 0.57 0.93

Static equivalent radial load Por=Xo Fr+Yo Fa Contact angle

30˚ 40˚

Single, DT Xo Yo 0.5 0.5

DB, DF

Xo

0.33 0.26

1 1

Yo 0.66 0.52

For single and DT arrangement, When Por<Fr use Por=Fr

dynamic

Cr

Basic load ratings static dynamic static

(duplex)

(duplex)

kN

kgf Cor

Cr

Cor

Limiting speeds1)

Bearing numbers2)

Abutment and fillet dimensions

(duplex)

min-1 grease

mm da

db

Da

Db

ras

r1as

oil

DB

DF

DT

min

min

max

max

max

max

29.3 52.0 100 91.0 159 146

35.0 56.0 98.0 89.0 143 132

2 990 5 300 10 200 9 250 16 200 14 900

3 550 5 700 10 000 9 100 14 600 13 400

6 200 5 800 5 300 4 600 4 700 4 100

8 300 7 700 7 000 6 100 6 300 5 500

DB DB DB DB DB DB

DF DF DF DF DF DF

DT DT DT DT DT DT

65.5 67 68.5 68.5 72 72

65.5 67 65.5 65.5 67 67

79.5 88 101.5 101.5 118 118

80.5 90.5 104.5 104.5 123 123

1 1 1.5 1.5 2 2

0.6 0.6 1 1 1 1

29.7 55.0 114 103 180 166

36.0 62.5 116 105 164 151

3 050 5 600 11 600 10 500 18 400 16 900

3 700 6 400 11 800 10 700 16 700 15 400

5 700 5 400 4 900 4 200 4 400 3 800

7 600 7 100 6 500 5 600 5 800 5 100

DB DB DB DB DB DB

DF DF DF DF DF DF

DT DT DT DT DT DT

70.5 72 73.5 73.5 77 77

70.5 72 70.5 70.5 72 72

84.5 93 111.5 111.5 128 128

85.5 95.5 114.5 114.5 133 133

1 1 1.5 1.5 2 2

0.6 0.6 1 1 1 1

42.5 69.5 124 112 203 186

52.5 78.5 127 116 187 172

4 350 7 050 12 600 11 500 20 700 19 000

5 350 8 050 13 000 11 800 19 100 17 600

5 300 5 000 4 500 3 900 4 100 3 500

7 100 6 600 6 000 5 200 5 400 4 700

DB DB DB DB DB DB

DF DF DF DF DF DF

DT DT DT DT DT DT

75.5 77 78.5 78.5 82 82

75.5 77 75.5 75.5 77 77

94.5 103 116.5 116.5 138 138

95.5 105.5 119.5 119.5 143 143

1 1 1.5 1.5 2 2

0.6 0.6 1 1 1 1

43.0 71.0 128 116 221 202

54.0 83.5 137 124 212 195

4 400 7 250 13 100 11 800 22 500 20 600

5 500 8 500 14 000 12 700 21 600 19 800

5 000 4 600 4 200 3 700 3 800 3 300

6 700 6 200 5 600 4 900 5 000 4 400

DB DB DB DB DB DB

DF DF DF DF DF DF

DT DT DT DT DT DT

80.5 82 83.5 83.5 87 87

80.5 82 80.5 80.5 82 82

99.5 108 121.5 121.5 148 148

100.5 110.5 124.5 124.5 153 153

1 1 1.5 1.5 2 2

0.6 0.6 1 1 1 1

43.5 86.5 145 131 239 219

56.0 101 152 139 238 218

4 450 8 850 14 700 13 300 24 400 22 300

5 700 10 300 15 500 14 100 24 200 22 300

4 700 4 400 3 900 3 400 3 500 3 100

6 200 5 800 5 300 4 600 4 700 4 100

DB DB DB DB DB DB

DF DF DF DF DF DF

DT DT DT DT DT DT

85.5 87 90 90 92 92

85.5 87 85.5 85.5 87 87

104.5 118 130 130 158 158

105.5 120.5 134.5 134.5 163 163

1 1 2 2 2 2

0.6 0.6 1 1 1 1

59.0 89.0 162 146

76.0 107 177 161

6 000 9 050 16 500 14 900

7 750 10 900 18 100 16 400

4 400 4 100 3 700 3 200

5 900 5 500 5 000 4 300

DB DB DB DB

DF DF DF DF

DT DT DT DT

92 92 95 95

92 92 90.5 90.5

113 123 140 140

115.5 125.5 144.5 144.5

1 1 2 2

0.6 0.6 1 1

Note: For bearing series 79 and 70, inner rings are constructed with groove abutments on both sides. Therefore, the inner ring chamfer dimension r1 is identical to dimension r. Furthermore, the radius r1a of the shaft corner roundness is likewise identical to ra.

B-51


● Single and Duplex Angular Contact Ball Bearings

2B

B r

ra

r1

r1

ra

r

φD

a

a

Single

φda

φDa

φd

a

a

Tandem arrangement (DT)

Face-to-face arrangement (DF)

Back-to-back arrangement (DB)

d 85 ∼ 120mm Boundary dimensions

Basic load ratings dynamic static dynamic static kN kgf

D

B

mm 2B

85

180 180

41 41

82 82

3 3

1.1 1.1

159 146

133 122

90

125 140 160 160 190 190

18 24 30 30 43 43

36 48 60 60 86 86

1.1 1.5 2.0 2.0 3.0 3.0

0.6 1 1 1 1.1 1.1

36.0 65.0 118 107 171 156

95

130 145 170 170 200 200

18 24 32 32 45 45

36 48 64 64 90 90

1.1 1.5 2.1 2.1 3 3

0.6 1 1.1 1.1 1.1 1.1

100

140 150 180 180 215 215

20 24 34 34 47 47

40 48 68 68 94 94

1.1 1.5 2.1 2.1 3 3

105

145 160 190 190 225 225

20 26 36 36 49 49

40 52 72 72 98 98

110

150 170 200 200 240 240

20 28 38 38 50 50

120

165

22

d

rs min3) rls min3)

Limiting speeds1)

Bearing2) numbers

min-1

Load center

Mass

mm

kg single

a

(approx.)

grease

oil

16 200 13 500 14 800 12 400

4 200 3 600

5 600 4 800

7317 7317B

59 76

4.34 4.43

38.0 63.5 103 94.0 147 135

3 650 3 850 6 650 6 450 12 000 10 500 10 900 9 550 17 400 15 000 15 900 13 800

5 200 4 900 4 400 3 800 4 000 3 400

7 000 6 500 5 900 5 000 5 300 4 500

7918 7018 7218 7218B 7318 7318B

40 45 51 67.5 62 80.5

0.658 1.35 2.18 2.22 5.06 5.16

37.0 67.0 133 121 183 167

40.5 67.0 118 107 162 149

3 800 6 800 13 600 12 300 18 600 17 100

4 150 6 800 12 000 11 000 16 600 15 200

5 000 4 600 4 100 3 500 3 700 3 200

6 600 6 100 5 500 4 700 5 000 4 200

7919 7019 7219 7219B 7319 7319B

41.5 46.5 54.5 71.5 65 84.5

0.688 1.41 2.67 2.72 5.89 6

0.6 1 1.1 1.1 1.1 1.1

48.0 68.5 144 130 207 190

52.5 70.5 126 114 193 178

4 900 6 950 14 700 13 300 21 100 19 400

5 350 7 200 12 800 11 700 19 700 18 100

4 700 4 400 3 900 3 400 3 500 3 000

6 200 5 800 5 200 4 500 4 700 4 000

7920 7020 7220 7220B 7320 7320B

44.5 48 57.5 76 69 89.5

0.934 1.47 3.2 3.26 7.18 7.32

1.1 2 2.1 2.1 3 3

0.6 1 1.1 1.1 1.1 1.1

48.5 80.0 157 142 220 202

54.5 81.5 142 129 210 194

4 950 8 150 16 000 14 500 22 400 20 600

5 550 8 350 14 400 13 100 21 500 19 700

4 400 4 100 3 700 3 200 3 400 2 900

5 900 5 500 5 000 4 300 4 500 3 800

7921 7021 7221 7221B 7321 7321B

46 51.5 60.5 80 72 93.5

0.972 1.86 3.79 3.87 8.2 8.36

40 56 76 76 100 100

1.1 2 2.1 2.1 3 3

0.6 1 1.1 1.1 1.1 1.1

49.5 92.0 170 154 246 226

56.0 93.0 158 144 246 226

5 050 9 350 17 300 15 700 25 100 23 000

5 700 9 450 16 100 14 700 25 100 23 100

4 200 3 900 3 500 3 000 3 200 2 700

5 700 5 300 4 700 4 000 4 300 3 700

7922 7022 7222 7222B 7322 7322B

47.5 54.5 64 84 76 99

1.01 2.3 4.45 4.54 9.6 9.8

44

1.1

0.6

61.0

69.5

6 200

7 100

3 900

5 200

7924

52

1.66

Cr

Cor

Cr

Cor

1)This value achieved with machined cages; when pressed cages are used, 80% of this value is acceptable. 2)Bearing numbers appended with the code "B" have a contact angle of 40˚; bearings with this code have a contact angle of 30˚. 3)Smallest allowable dimension for chamfer dimension r or rl. B-52


● Single and Duplex Angular Contact Ball Bearings

r1 a

Dynamic equivalent radial load Pr=XFr+YFa

ra

Contact angle

ra

r1a

φDb

φDa

φda

Single, DT DB, DF Fa / Fr≦e Fa / Fr>e Fa / Fr≦e Fa / Fr>e X Y X Y X Y X Y

e

30˚ 0.80 40˚ 1.14

φdb

1 1

0 0

0.39 0.76 0.35 0.57

1 1

0.78 0.63 1.24 0.55 0.57 0.93

Static equivalent radial load Por=Xo Fr+Yo Fa Contact angle

30˚ 40˚

Single, DT Xo Yo 0.5 0.5

DB, DF

Xo

0.33 0.26

1 1

Yo 0.66 0.52

For single and DT arrangement, When Por<Fr use Por=Fr

dynamic

Cr

Basic load ratings static dynamic static

(duplex)

(duplex)

kN

kgf Cor

Cr

Cor

Limiting speeds1)

Bearing numbers2)

Abutment and fillet dimensions

(duplex)

min-1 grease

mm oil

DB

DF

DT

da

db

Da

Db

ras

r1as

min

min

max

max

max

max

258 236

265 244

26 300 24 100

27 000 24 900

3 300 2 900

4 500 3 900

DB DB

DF DF

DT DT

99 99

92 92

166 166

173 173

2.5 2.5

1 1

58.0 106 191 173 277 254

75.5 127 206 188 294 270

5 900 10 800 19 500 17 700 28 300 25 900

7 700 12 900 21 000 19 100 30 000 27 600

4 200 3 900 3 500 3 100 3 200 2 700

5 500 5 200 4 700 4 100 4 200 3 700

DB DB DB DB DB DB

DF DF DF DF DF DF

DT DT DT DT DT DT

97 98.5 100 100 104 104

97 98.5 95.5 95.5 97 97

118 131.5 150 150 176 176

120.5 134.5 154.5 154.5 183 183

1 1.5 2 2 2.5 2.5

0.6 1 1 1 1 1

60.5 109 217 196 297 272

81.5 134 236 215 325 298

6 150 11 100 22 100 20 000 30 500 27 700

8 300 13 600 24 100 21 900 33 000 30 500

3 900 3 700 3 300 2 900 3 000 2 600

5 300 4 900 4 400 3 800 3 900 3 400

DB DB DB DB DB DB

DF DF DF DF DF DF

DT DT DT DT DT DT

102 103.5 107 107 109 109

102 103.5 102 102 102 102

123 136.5 158 158 186 186

125.5 139.5 163 163 193 193

1 1.5 2 2 2.5 2.5

0.6 1 1 1 1 1

78.0 111 233 212 335 310

105 141 251 229 385 355

7 950 11 300 23 800 21 600 34 500 31 500

10 700 14 400 25 600 23 300 39 500 36 000

3 700 3 500 3 100 2 700 2 800 2 400

5 000 4 600 4 200 3 600 3 700 3 300

DB DB DB DB DB DB

DF DF DF DF DF DF

DT DT DT DT DT DT

107 108.5 112 112 114 114

107 108.5 107 107 107 107

133 141.5 168 168 201 201

135.5 144.5 173 173 208 208

1 1.5 2 2 2.5 2.5

0.6 1 1 1 1 1

79.0 130 254 231 355 330

109 163 283 258 420 385

8 050 13 300 25 900 23 500 36 500 33 500

11 100 16 700 28 900 26 300 43 000 39 500

3 500 3 300 3 000 2 600 2 700 2 300

4 700 4 400 4 000 3 500 3 600 3 100

DB DB DB DB DB DB

DF DF DF DF DF DF

DT DT DT DT DT DT

112 115 117 117 119 119

112 115 112 112 112 112

138 150 178 178 211 211

140.5 154.5 183 183 218 218

1 2 2 2 2.5 2.5

0.6 1 1 1 1 1

80.0 149 276 250 400 365

112 186 315 289 490 455

8 150 15 200 28 100 25 500 41 000 37 500

11 400 18 900 32 500 29 400 50 000 46 000

3 400 3 100 2 800 2 500 2 600 2 200

4 500 4 200 3 800 3 300 3 400 3 000

DB DB DB DB DB DB

DF DF DF DF DF DF

DT DT DT DT DT DT

117 120 122 122 124 124

117 120 117 117 117 117

143 160 188 188 226 226

145.5 164.5 193 193 233 233

1 2 2 2 2.5 2.5

0.6 1 1 1 1 1

99.0

139

10 100

14 200

3 100

4 100

DB

DF

DT

127

127

158

160.5

1

0.6

Note: For bearing series 79 and 70, inner rings are constructed with groove abutments on both sides. Therefore, the inner ring chamfer dimension r1 is identical to dimension r. Furthermore, the radius r1a of the shaft corner roundness is likewise identical to ra.

B-53


● Single and Duplex Angular Contact Ball Bearings

2B

B r

ra

r1

r

ra

r

φD

a

a

Single

φda

φDa

φd

a

a

Back-to-back arrangement (DB)

Face-to-face arrangement (DF)

Tandem arrangement (DT)

d 120 ∼ 170mm Boundary dimensions

D

B

mm 2B

120

180 215 215 260 260

28 40 40 55 55

56 80 80 110 110

2 2.1 2.1 3 3

130

180 200 230 230 280 280

24 33 40 40 58 58

48 66 80 80 116 116

140

190 210 250 250 300 300

24 33 42 42 62 62

150

210 225 270 270 320 320

d

Basic load ratings dynamic static dynamic static kN kgf

rs min2) rls min2)

Limiting speeds

Bearing1) numbers

min-1

Load center

Mass

mm

kg single

a

(approx.)

grease

oil

10 000 18 100 16 500 25 700 23 600

3 600 3 200 2 800 2 900 2 500

4 800 4 300 3 700 3 900 3 300

7024 7224 7224B 7324 7324B

57.5 68.5 90.5 82.5 107

2.47 6.26 6.26 14.7 14.7

7 650 12 000 20 000 18 100 27 900 25 500

8 900 12 800 20 200 18 300 29 800 27 400

3 600 3 300 3 000 2 500 2 700 2 300

4 700 4 400 4 000 3 400 3 600 3 100

7926 7026 7226 7226B 7326 7326B

56.5 64 72 95.5 88 115

1.82 3.73 7.15 7.15 17.6 17.6

90.0 133 215 195 335 310

7 700 12 200 20 700 18 700 30 500 28 100

9 150 13 500 21 900 19 900 34 500 31 500

3 300 3 100 2 700 2 300 2 500 2 100

4 400 4 100 3 600 3 100 3 300 2 800

7928 7028 7228 7228B 7328 7328B

59.5 67 77.5 103 94.5 123

1.94 3.96 8.78 8.78 21.5 21.5

97.5 137 232 210 330 300

117 154 259 235 380 350

9 900 14 000 23 700 21 400 33 500 30 500

11 900 15 700 26 400 24 000 39 000 36 000

3 100 2 800 2 500 2 200 2 300 2 000

4 100 3 800 3 400 2 900 3 100 2 600

7930 7030 7230 7230B 7330 7330B

66 71.5 83 111 100 131

2.96 4.82 11 11 25.1 25.1

1 1.1 1.1 1.1 1.5 1.5

98.5 155 263 238 345 315

121 176 305 279 420 385

10 000 15 800 26 800 24 200 35 500 32 000

12 300 18 000 31 500 28 400 43 000 39 500

2 800 2 700 2 400 2 000 2 100 1 800

3 800 3 600 3 200 2 700 2 800 2 400

7932 7032 7232 7232B 7332 7332B

69 77 89 118 106 139

3.13 5.96 13.7 13.7 29.8 29.8

1 1.1 1.5 1.5 1.5

102 186 295 266 390

129 214 360 325 485

10 400 18 900 30 000 27 200 39 500

13 100 21 900 36 500 33 000 49 500

2 700 2 500 2 200 1 900 2 000

3 600 3 300 3 000 2 500 2 700

7934 7034 7234 7234B 7334

71.5 83 95.5 127 113

3.29 7.96 17 17 35.3

Cr

Cor

Cr

1 1.1 1.1 1.1 1.1

93.5 183 165 246 225

98.5 177 162 252 231

9 550 18 600 16 900 25 100 23 000

1.5 2 3 3 4 4

1 1 1.1 1.1 1.5 1.5

75.0 117 196 177 273 250

87.5 125 198 180 293 268

48 66 84 84 124 124

1.5 2 3 3 4 4

1 1 1.1 1.1 1.5 1.5

75.5 120 203 183 300 275

28 35 45 45 65 65

56 70 90 90 130 130

2 2.1 3 3 4 4

1 1.1 1.1 1.1 1.5 1.5

160

220 240 290 290 340 340

28 38 48 48 68 68

56 76 96 96 136 136

2 2.1 3 3 4 4

170

230 260 310 310 360

28 42 52 52 72

56 84 104 104 144

2 2.1 4 4 4

Cor

1)Bearing numbers appended with the code "B" have a contact angle of 40˚; bearings with this code have a contact angle of 30˚. 2)Smallest allowable dimension for chamfer dimension r or rl.

B-54


● Single and Duplex Angular Contact Ball Bearings

r1 a

Dynamic equivalent radial load Pr=XFr+YFa

ra

Contact angle

ra

r1a

φDb

φDa

φda

Single, DT DB, DF Fa / Fr≦e Fa / Fr>e Fa / Fr≦e Fa / Fr>e X Y X Y X Y X Y

e

30˚ 0.80 40˚ 1.14

φdb

1 1

0 0

0.39 0.76 0.35 0.57

1 1

0.78 0.63 1.24 0.55 0.57 0.93

Static equivalent radial load Por=Xo Fr+Yo Fa Contact angle

30˚ 40˚

Single, DT Xo Yo 0.5 0.5

0.33 0.26

DB, DF

Xo

Yo 0.66 0.52

1 1

For single and DT arrangement, When Por<Fr use Por=Fr

dynamic

Cr

Basic load ratings static dynamic

Limiting speeds static

(duplex)

(duplex)

kN

kgf Cor

Bearing numbers1)

Abutment and fillet dimensions

(duplex)

min-1

Cr

Cor

grease

oil

DB

DF

DT

da

Da

mm Db

ras

r1as

min

max

max

max

max

152 297 269 400 365

197 355 325 505 460

15 500 30 500 27 400 41 000 37 500

20 100 36 000 33 000 51 500 47 000

2 900 2 600 2 300 2 300 2 000

3 800 3 400 3 000 3 100 2 700

DB DB DB DB DB

DF DF DF DF DF

DT DT DT DT DT

130 132 132 134 134

170 203 203 246 246

174.5 208 208 253 253

2 2 2 2.5 2.5

1 1 1 1 1

121 191 320 288 445 405

175 251 395 360 585 535

12 400 19 400 32 500 29 400 45 500 41 500

17 800 25 600 40 500 36 500 59 500 54 500

2 800 2 600 2 400 2 100 2 100 1 900

3 800 3 500 3 100 2 700 2 800 2 500

DB DB DB DB DB DB

DF DF DF DF DF DF

DT DT DT DT DT DT

138.5 140 144 144 148 148

171.5 190 216 216 262 262

174.5 194.5 223 223 271.5 271.5

1.5 2 2.5 2.5 3 3

1 1 1 1 1.5 1.5

123 194 330 297 490 445

180 265 430 390 670 615

12 500 19 800 33 500 30 500 50 000 45 500

18 300 27 000 44 000 40 000 68 500 63 000

2 600 2 400 2 200 1 900 2 000 1 700

3 500 3 300 2 900 2 500 2 600 2 300

DB DB DB DB DB DB

DF DF DF DF DF DF

DT DT DT DT DT DT

148.5 150 154 154 158 158

181.5 200 236 236 282 282

184.5 204.5 243 243 291.5 291.5

1.5 2 2.5 2.5 3 3

1 1 1 1 1.5 1.5

158 222 375 340 535 490

234 305 515 470 765 700

16 100 22 700 38 500 34 500 54 500 50 000

23 900 31 500 53 000 48 000 78 000 71 500

2 400 2 300 2 000 1 800 1 800 1 600

3 300 3 000 2 700 2 400 2 400 2 100

DB DB DB DB DB DB

DF DF DF DF DF DF

DT DT DT DT DT DT

160 162 164 164 168 168

200 213 256 256 302 302

204.5 218 263 263 311.5 311.5

2 2 2.5 2.5 3 3

1 1 1 1 1.5 1.5

160 252 425 385 565 515

241 355 615 555 845 770

16 300 25 700 43 500 39 500 57 500 52 500

24 600 36 000 62 500 57 000 86 000 79 000

2 300 2 100 1 900 1 600 1 700 1 500

3 000 2 800 2 500 2 200 2 300 2 000

DB DB DB DB DB DB

DF DF DF DF DF DF

DT DT DT DT DT DT

170 172 174 174 178 178

210 228 276 276 322 322

214.5 233 283 283 331.5 331.5

2 2 2.5 2.5 3 3

1 1 1 1 1.5 1.5

165 300 480 435 630

257 430 715 650 970

16 900 31 000 49 000 44 000 64 500

26 200 43 500 73 000 66 500 99 000

2 100 2 000 1 800 1 500 1 600

2 800 2 600 2 400 2 100 2 100

DB DB DB DB DB

DF DF DF DF DF

DT DT DT DT DT

180 182 188 188 188

220 248 292 292 342

224.5 253 301.5 301.5 351.5

2 2 3 3 3

1 1 1.5 1.5 1.5

B-55


● Single and Duplex Angular Contact Ball Bearings

2B

B r

ra

r1

r

ra

r

φD

a

a

Single

φda

φDa

φd

a

a

Tandem arrangement (DT)

Face-to-face arrangement (DF)

Back-to-back arrangement (DB)

d 170 ∼ 300mm Boundary dimensions

Basic load ratings dynamic static dynamic static kN kgf

D

B

mm 2B

170

360

72

144

4

1.5

355

445

180

250 280 320 320 380 380

33 46 52 52 75 75

66 92 104 104 150 150

2 2.1 4 4 4 4

1 1.1 1.5 1.5 1.5 1.5

131 219 305 276 410 375

190

260 290 340 340 400 400

33 46 55 55 78 78

66 92 110 110 156 156

2 2.1 4 4 5 5

1 1.1 1.5 1.5 2 2

200

280 310 360 360 420 420

38 51 58 58 80 80

76 102 116 116 160 160

2.1 2.1 4 4 5 5

220

300

38

76

240

320

38

260

360

280 300

d

rs min2) rls min2)

Limiting speeds

Bearing1) numbers

min-1

Load center

Mass

mm

kg single

a

(approx.)

grease

oil

36 000 45 500

1 700

2 300

7334B

147

35.3

163 266 385 350 535 490

13 400 22 300 31 000 28 100 41 500 38 000

16 600 27 100 39 000 35 500 54 500 50 000

2 500 2 300 2 100 1 800 1 900 1 600

3 300 3 100 2 800 2 400 2 500 2 100

7936 7036 7236 7236B 7336 7336B

78.5 89.5 98 131 118 155

4.87 10.4 17.7 17.7 40.9 40.9

133 224 305 273 430 390

169 280 390 355 585 535

13 500 22 800 31 000 27 800 44 000 40 000

17 200 28 600 39 500 36 000 59 500 54 500

2 400 2 200 2 000 1 700 1 800 1 500

3 200 2 900 2 600 2 200 2 300 2 000

7938 7038 7238 7238B 7338 7338B

81.5 92.5 104 139 124 163

5.1 10.8 21.3 21.3 47 47

1.1 1.1 1.5 1.5 2 2

185 252 335 305 450 410

231 325 450 410 605 555

18 900 25 700 34 500 31 000 46 000 42 000

23 600 33 000 46 000 41 500 62 000 56 500

2 200 2 100 1 900 1 600 1 700 1 400

3 000 2 800 2 500 2 100 2 200 1 900

7940 7040 7240 7240B 7340 7340B

88.5 99 110 146 130 170

7.15 14 25.3 25.3 53.1 53.1

2.1

1.1

187

239

19 000 24 300

2 000

2 700

7944

94

7.74

76

2.1

1.1

193

255

19 600 26 000

1 800

2 400

7948

100

8.34

46

92

2.1

1.1

258

375

26 300 38 000

1 700

2 200

7952

112

14

380

46

92

2.1

1.1

261

385

26 600 39 500

1 500

2 100

7956

118

14.8

420

56

112

3

1.1

325

520

33 500 53 000

1 400

1 900

7960

132

23.7

Cr

Cor

Cr

Cor

1)Bearing numbers appended with the code "B" have a contact angle of 40˚; bearings with this code have a contact angle of 30˚. 2)Smallest allowable dimension for chamfer dimension r or rl.

B-56


● Single and Duplex Angular Contact Ball Bearings

r1 a

Dynamic equivalent radial load Pr=XFr+YFa

ra

Contact angle

ra

r1a

φDb

φDa

φda

Single, DT DB, DF Fa / Fr≦e Fa / Fr>e Fa / Fr≦e Fa / Fr>e X Y X Y X Y X Y

e

30˚ 0.80 40˚ 1.14

φdb

1 1

0 0

0.39 0.76 0.35 0.57

1 1

0.78 0.63 1.24 0.55 0.57 0.93

Static equivalent radial load Por=Xo Fr+Yo Fa Contact angle

30˚ 40˚

Single, DT Xo Yo 0.5 0.5

0.33 0.26

DB, DF

Xo

Yo 0.66 0.52

1 1

For single and DT arrangement, When Por<Fr use Por=Fr

Basic load ratings static dynamic

dynamic

Cr

Limiting speeds static

(duplex)

(duplex)

kN

kgf Cor

Bearing numbers1)

Abutment and fillet dimensions

(duplex)

min-1 da

Da

mm Db

ras

r1as

min

max

max

max

max

Cr

Cor

grease

oil

DB

DF

DT

59 000

90 500

1 400

1 800

DB

DF

DT

188

342

351.5

3

1.5

575

890

213 355 495 450 665 605

325 530 770 700 1 070 975

21 700 33 500 36 500 54 000 50 500 78 500 45 500 71 000 68 000 109 000 62 000 99 500

2 000 1 900 1 700 1 400 1 500 1 300

2 700 2 500 2 200 1 900 2 000 1 700

DB DB DB DB DB DB

DF DF DF DF DF DF

DT DT DT DT DT DT

190 192 198 198 198 198

240 268 302 302 362 362

244.5 273 311.5 311.5 371.5 371.5

2 2 3 3 3 3

1 1 1.5 1.5 1.5 1.5

216 365 495 445 695 635

335 560 780 705 1 170 1 070

22 000 34 500 37 000 57 000 50 000 79 500 45 000 72 000 71 000 119 000 64 500 109 000

1 900 1 800 1 600 1 400 1 400 1 200

2 500 2 300 2 100 1 800 1 900 1 600

DB DB DB DB DB DB

DF DF DF DF DF DF

DT DT DT DT DT DT

200 202 208 208 212 212

250 278 322 322 378 378

254.5 283 331.5 331.5 390 390

2 2 3 3 4 4

1 1 1.5 1.5 2 2

300 410 550 495 730 665

465 650 900 815 1 210 1 110

30 500 47 000 41 500 66 000 56 000 92 000 50 500 83 000 74 500 124 000 68 000 113 000

1 800 1 700 1 500 1 300 1 300 1 200

2 400 2 200 2 000 1 700 1 800 1 500

DB DB DB DB DB DB

DF DF DF DF DF DF

DT DT DT DT DT DT

212 212 218 218 222 222

268 298 342 342 398 398

273 303 351.5 351.5 410 410

2 2 3 3 4 4

1 1 1.5 1.5 2 2

305

475

31 000

48 500

1 600

2 100

DB

DF

DT

232

288

293

2

1

315

510

32 000

52 000

1 500

1 900

DB

DF

DT

252

308

313

2

1

420

750

42 500

76 500

1 300

1 800

DB

DF

DT

272

348

353

2

1

425

775

43 000

79 000

1 200

1 600

DB

DF

DT

292

368

373

2

1

530

1 040

54 000 106 000

1 100

1 500

DB

DF

DT

314

406

413

2.5

1

B-57


● Four-Point Contact Ball Bearings QJ type B ra

r r

ra

φD

φd

φda

φDa

Dynamic equivalent axial load Pa=Fa Static equivalent axial load Poa= Fa

a

d 30 ∼ 90mm Boundary dimensions mm

Basic load ratings dynamic static dynamic kN kgf

rs min1)

Limiting speeds static min-1

Ca

Coa

Ca

Coa

grease

oil

1.1

39.5

57.5

4 050

5 850

8 000

11 000

21

1.5

49.5

73.0

5 050

7 450

7 000

80 90

18 23

1.1 1.5

44.0 60.5

70.5 91.5

4 500 6 200

7 200 9 350

45

85 100

19 25

1.1 1.5

49.5 81.0 79.0 121

5 050 8 050

50

90 110

20 27

1.1 2

52.0 89.0 92.0 145

55

100 120

21 29

1.5 2

60

110 130

22 31

65

120 140

70

d

D

B

30

72

19

35

80

40

Bearing numbers

Abutment and fillet dimensions mm da Da ras

Load center mm a

Mass kg

min

max

max

QJ306

37

65

1

30

0.42

9 300

QJ307

43.5

71.5

1.5

33

0.57

6 900 6 200

9 200 8 200

QJ208 QJ308

47 48.5

73 81.5

1 1.5

34.5 37.5

0.45 0.78

8 250 12 300

6 200 5 500

8 200 7 400

QJ209 QJ309

52 53.5

78 91.5

1 1.5

37.5 42

0.52 1.05

5 300 9 400

9 050 14 700

5 600 5 000

7 500 6 700

QJ210 QJ310

57 60

83 100

1 2

40.5 46

0.603 1.38

64.0 112 106 170

6 550 10 900

11 400 17 400

5 100 4 600

6 800 6 100

QJ211 QJ311

63.5 65

91.5 110

1.5 2

44.5 50.5

0.78 1.76

1.5 2.1

77.5 138 122 198

7 900 12 400

14 000 20 200

4 700 4 200

6 300 5 700

QJ212 QJ312

68.5 72

101.5 118

1.5 2

49 55

0.98 2.18

23 33

1.5 2.1

84.5 153 138 228

8 600 14 100

15 600 23 200

4 400 3 900

5 800 5 200

QJ213 QJ313

73.5 77

111.5 128

1.5 2

53.5 59

1.24 2.7

125 150

24 35

1.5 2.1

92.0 168 155 260

9 350 15 800

17 200 26 500

4 000 3 600

5 400 4 800

QJ214 QJ314

78.5 82

116.5 138

1.5 2

56.5 63.5

1.36 3.27

75

130 160

25 37

1.5 2.1

96.0 183 169 294

9 750 17 200

18 600 30 000

3 800 3 400

5 000 4 500

QJ215 QJ315

83.5 87

121.5 148

1.5 2

59 68

1.53 3.9

80

140 170

26 39

2 2.1

112 183

217 330

11 400 18 600

22 100 33 500

3 500 3 200

4 700 4 200

QJ216 QJ316

90 92

130 158

2 2

63.5 72

1.83 4.64

85

150 180

28 41

2 3

126 197

252 370

12 800 20 100

25 700 37 500

3 300 3 000

4 400 4 000

QJ217 QJ317

95 99

140 166

2 2.5

68 76.5

2.3 5.43

90

160 190

30 43

2 3

148 212

293 410

15 100 21 600

29 900 41 500

3 100 2 800

4 200 3 800

QJ218 100 QJ318 104

150 176

2 2.5

72 81

2.76 6.31

1)Smallest allowable dimension for chamfer dimension r. Note: 1. These bearings are also manufactured with a slot in the chamfer section of the outer ring to stop whirling. 2. This bearing is widely used in applications where the only type of load is axial. When considering it for use where radial loads are applied, consult NTN Engineering.

B-58

(approx.)


● Four-Point Contact Ball Bearings QJ type B ra

r r

ra

φD

φd

φda

φDa

Dynamic equivalent axial load Pa=Fa Static equivalent axial load Poa= Fa

a

d 95 ∼ 120mm Boundary dimensions mm d

Basic load ratings dynamic static dynamic kN kgf

rs min1)

oil

34 000 46 000

3 000 2 700

18 400 27 800

36 000 59 500

400 585

20 100 27 900

213 305

450 680

240 325

540 765

B

170 200

32 45

2.1 3

168 227

335 450

17 200 23 100

180

34 47

2.1 3

181 273

355 585

190

36 49

2.1 3

197 273

110 240

200

38 50

2.1 3

215

40 55

2.1 3

100 215 105 225

120 260

min-1 grease

D

95

Limiting speeds static

Ca

Coa

Ca

Coa

Bearing numbers

Abutment and fillet dimensions mm da Da ras

Load center mm

Mass kg

min

max

max

a

3 900 3 500

QJ219 107 QJ319 109

158 186

2 2.5

76.5 85

3.35 7.41

2 800 2 500

3 700 3 400

QJ220 112 QJ320 114

168 201

2 2.5

81 91

4.02 9.14

41 000 59 500

2 700 2 400

3 600 3 200

QJ221 117 QJ321 119

178 211

2 2.5

85 4.75 95.5 10.4

21 700 31 000

45 500 69 500

2 500 2 300

3 400 3 100

QJ222 122 QJ322 124

188 226

2 89.5 5.62 2.5 101 12

24 500 33 000

55 000 78 000

2 300 2 100

3 100 2 800

QJ224 132 QJ324 134

203 246

2 96.5 6.75 2.5 110 15.9

1)Smallest allowable dimension for chamfer dimension r. Note: 1. These bearings are also manufactured with a slot in the chamfer section of the outer ring to stop whirling. 2. This bearing is widely used in applications where the only type of load is axial. When considering it for use where radial loads are applied, consult NTN Engineering.

B-59

(approx.)


● Double Row Angular Contact Ball Bearings

B ra

r

ra

r φD

φd

φDa

Dynamic equivalent radial load Pr=XFr+YFa Fa Fa ≦e >e Fr Fr e X Y X Y 0.68 1 0.92 0.67 1.41

φda

Static equivalent radial load Por=Fr+0.76Fa

a

d 10 ∼ 65mm Boundary dimensions dynamic mm

Basic load ratings static dynamic static kN kgf

rs min1)

Cr

Cor

14.3

0.6

7.15

3.90

730

32

15.9

0.6

10.5

5.80

15

35 42

15.9 19

0.6 1

11.7 17.6

17

40 47

17.5 22.2

0.6 1

20

47 52

20.6 22.2

25

52 62

30

Limiting speeds min-1 grease

oil

400

17 000

22 000

1 070

590

15 000

7.05 10.2

1 190 1 800

715 1 040

14.6 21.0

9.05 12.6

1 490 2 140

1 1.1

19.6 24.6

12.4 15.0

20.6 25.4

1 1.1

21.3 32.5

62 72

23.8 30.2

1 1.1

35

72 80

27 34.9

40

80 90

45

d

D

B

10

30

12

Cr

Bearing numbers

Cor

Abutment and fillet dimensions mm da Da ras

Load Mass center mm kg

min

max

max

a

(approx.)

5200S

15

25

0.6

14.5

0.05

20 000

5201S

17

27

0.6

16.7

0.06

13 000 11 000

17 000 15 000

5202S 5302S

20 21

30 36

0.6 1

18.3 22.0

0.07 0.11

920 1 280

11 000 10 000

15 000 13 000

5203S 5303S

22 23

35 41

0.6 1

20.8 25.0

0.09 0.14

2 000 2 510

1 270 1 530

10 000 9 000

13 000 12 000

5204S 5304S

26 27

41 45

1 1

24.3 26.7

0.12 0.23

14.7 20.7

2 170 3 350

1 500 2 110

8 500 7 500

11 000 10 000

5205S 5305S

31 32

46 55

1 1

26.8 31.8

0.19 0.34

29.6 40.5

21.1 28.1

3 000 4 150

2 150 2 870

7 100 6 300

9 500 8 500

5206S 5306S

36 37

56 65

1 1

31.6 36.5

0.29 0.51

1.1 1.5

39.0 51.0

28.7 36.0

4 000 5 200

2 920 3 700

6 300 5 600

8 000 7 500

5207S 5307S

42 44

65 71

1 1.5

36.6 41.6

0.43 0.79

30.2 36.5

1.1 1.5

44.0 56.5

33.5 41.0

4 500 5 800

3 400 4 200

5 600 5 300

7 100 6 700

5208S 5308S

47 49

73 81

1 1.5

41.5 45.5

0.57 1.05

85 100

30.2 39.7

1.1 1.5

49.5 68.5

38.0 51.0

5 050 7 000

3 900 5 200

5 000 4 500

6 700 6 000

5209S 5309S

52 54

78 91

1 1.5

43.4 50.6

0.62 1.40

50

90 110

30.2 44.4

1.1 2

53.0 81.5

43.5 61.5

5 400 8 300

4 400 6 250

4 800 4 300

6 000 5 600

5210S 5310S

57 60

83 100

1 2

45.9 55.6

0.67 1.95

55

100 120

33.3 49.2

1.5 2

56.0 95.0

49.0 73.0

5 700 9 700

5 000 7 450

4 300 3 800

5 600 5 000

5211S 5311S

64 65

91 110

1.5 2

50.1 60.6

0.96 2.30

60

110 130

36.5 54

1.5 2.1

69.0 125

62.0 98.5

7 150 12 800

6 300 10 000

3 800 3 400

5 000 4 500

5212S 5312S

69 72

101 118

1.5 2

56.5 69.2

1.35 3.15

65

120 140

38.1 58.7

1.5 2.1

76.5 142

69.0 113

7 800 14 500

7 050 11 500

3 600 3 200

4 500 4 300

5213S 5313S

74 77

111 128

1.5 2

59.7 72.8

1.65 3.85

1)Smallest allowable dimension for chamfer dimension r.

B-60


● Double Row Angular Contact Ball Bearings

B ra

r

ra

r φD

φd

φDa

Dynamic equivalent radial load Pr=XFr+YFa Fa Fa ≦e >e Fr Fr e X Y X Y 0.68 1 0.92 0.67 1.41

φda

Static equivalent radial load Por=Fr+0.76Fa

a

d 70 ∼ 85mm Boundary dimensions mm rs min1)

Basic load ratings dynamic static dynamic static kN kgf

Limiting speeds min-1

Cr

Cor

grease

oil

82.0 128

9 600 16 200

8 400 13 100

3 400 3 000

4 500 3 800

93.5

83.0

9 550

8 500

3 200

99.0

93.0

10 100

9 500

11 800

11 200

d

D

B

Cr

70

125 150

39.7 63.5

1.5 2.1

94.0 159

75

130

41.3

1.5

80

140

44.4

2

85

150

49.2

2

116

Cor

110

Bearing numbers

1)Smallest allowable dimension for chamfer dimension r.

B-61

Abutment and fillet dimensions mm da Da ras

Load Mass center mm kg

min

max

max

a

(approx.)

5214S 5314S

79 82

116 138

1.5 2

63.8 78.3

1.80 4.90

4 300

5215S

84

121

1.5

66.1

1.90

3 000

3 800

5216S

90

130

2

69.6

2.50

2 800

3 600

5217S

95

140

2

75.3

3.40


● Double Row Angular Contact Ball Bearings

B r r φD

φd

a Shielded type (ZZ)

Non-contact sealed type (LLM)

Contact sealed type (LLD)

d 10 ∼ 40mm Boundary dimensions mm

Basic load ratings dynamic static dynamic static kN kgf

min-1 grease

rs min1)

d

D

B

10

30

14.3

0.6

12

32

15.9

15

35

17

Cr

Cor

Cr

Cor

7.15

3.90

730

0.6

8.50

5.30

15.9

0.6

8.50

40 47

17.5 22.2

0.6 1

20

47

20.6

25

52 62

30

Bearing numbers2)

Limiting speeds

oil sealed

non-contact contact type type

ZZ,LLM

LLD

Z,LM

400

17 000

15 000

22 000

5200SCZZ

LLM

LLD

865

540

15 000

12 000

20 000

5201SCZZ

LLM

LLD

5.30

865

540

13 000

12 000

17 000

5202SCZZ

LLM

LLD

12.7 19.6

8.30 12.4

1 290 2 000

850 1 270

11 000 10 000

10 000 9 500

15 000 13 000

5203SCZZ 5303SCZZ

LLM LLM

LLD LLD

1

15.9

10.7

1 620

1 090

10 000

9 000

13 000

5204SCZZ

LLM

LLD

20.6 25.4

1 1.1

16.9 25.2

12.3 18.2

1 730 2 570

1 260 1 850

8 500 7 500

7 500 6 300

11 000 10 000

5205SCZZ 3) LLM 5305SCZZ LLM

LLD LLD

62 72

23.8 30.2

1 1.1

25.2 39.0

18.2 28.7

2 570 4 000

1 850 2 920

7 100 6 300

6 300 5 300

9 500 8 500

5206SCZZ 5306SCZZ

LLM LLM

LLD LLD

35

72 80

27.0 34.9

1.1 1.5

34.0 44.0

25.3 33.5

3 500 4 500

2 580 3 400

6 300 5 600

5 300 4 800

8 500 7 500

5207SCZZ 5307SCZZ

LLM LLM

LLD LLD

40

80 90

30.2 36.5

1.1 1.5

36.5 49.5

29.0 38.0

3 700 5 050

2 960 3 900

5 600 5 300

4 800 4 500

7 100 6 700

5208SCZZ 3) LLM 5308SCZZ LLM

LLD LLD

1)Smallest allowable dimension for chamfer dimension r. 2)This bearing number is for double sealed and double shielded type bearings, but single sealed and single shielded type are also available. 3)Resin formed cage is standard for 5205SC and 5208SC. B-62


● Double Row Angular Contact Ball Bearings

Dynamic equivalent radial load Pr=XFr+YFa Fa Fa ≦e >e Fr Fr e X Y X Y 0.68 1 0.92 0.67 1.41 Static equivalent radial load Por=Fr+0.76Fa

ra ra

φDa

φda

Abutment and fillet dimensions mm da

Load center mm

Da

ras

min

max

max

max

a

14

15.5

26

0.6

14.5

16

19.0

28

0.6

16.3

19

19.0

31

0.6

16.3

21 23

23.5 25.5

36 41

0.6 1

20.1 24.3

26

26.5

41

1

23.0

31 32

32.0 38.5

46 55

1 1

25.4 30.9

36 37

38.5 44.5

56 65

1 1

30.9 36.6

42 44

45.0 50.5

65 71

1 1.5

36.3 41.5

47 49

50.5 53.0

73 81

1 1.5

39.4 43.0

B-63


â—?Self-Aligning Ball Bearings

1. Design features and characteristics

3. Ball protrusion

The outer ring raceway of self-aligning ball bearings forms a spherical surface whose center is common to the bearing center. The inner ring of the bearing has two raceways. The balls, cage, and inner ring of these bearings are capable of a shifting in order to compensate for a certain degree of misalignment with the outer rings. As a result, the bearing is able to align itself and compensate for shaft / housing finishing unevenness, bearing fitting error, and other sources of misalignment as shown in Diagram 1. However, since axial load capacity is limited, self-aligning ball bearings are not suitable for applications with heavy axial loads. Furthermore, if an adapter is used on the tapered bore of the inner diameter, installation and disassembly are much simpler and for this reason adapters are often used on equipment with drive shafts.

Bearings with part numbers listed in Diagram 2 below have balls which protrude slightly from the bearing face. B1 B

Diagram 2.

their degree of protrusion is listed below Units mm

Allowable misalignment

Bearing number

Width dimension B

Total width dimension B1

2222S (K)

53

54

2316S (K)

58

59

2319S (K)

67

68

2320S (K)

73

74

2321S

77

78

2322S (K)

80

81

1318S (K)

43

46

1319S (K)

45

49

1320S (K)

47

53

1321S

49

55

1322S (K)

50

56

Diagram 1.

4. Allowable misalignment angle 2. Standard cage types

Listed below are the allowable misalignment angles for bearings with self-aligning characteristics when placed under normal load conditions. This degree of allowable misalignment may be limited by the design of structures around the bearing.

All bearing series are equipped with a pressed cage, except 2322S, which is equipped with a machined cage.

Allowable misalignment under normal loads (loads equivalent to 0.09 Cr): 0.07 rad (4Ëš)

B-65


● Self-Aligning Ball Bearings

B ra

r

ra

r φd

φd

φD

Cylindrical bore

φDa

φda

Tapered bore

d 10 ∼ 35mm Boundary dimensions mm d

D

B

rs min1)

10

30 30 35 35

9 14 11 17

12

32 32 37 37

Basic load ratings dynamic static dynamic static kN kgf

Limiting speeds

Bearing numbers

min-1 cylindrical tapered2) bore bore

Cr

Cor

grease

oil

1.19 1.59 1.62 2.01

570 760 750 935

121 162 165 205

22 000 24 000 20 000 18 000

28 000 28 000 24 000 22 000

1200S 2200S 1300S 2300S

5.70 7.75 9.65 12.1

1.27 1.73 2.16 2.73

580 790 985 1 240

130 177 221 278

22 000 22 000 18 000 17 000

26 000 26 000 22 000 22 000

0.6 0.6 1 1

7.60 7.80 9.70 12.3

1.75 1.85 2.29 2.91

775 795 990 1 250

179 188 234 296

18 000 18 000 16 000 14 000

12 16 14 19

0.6 0.6 1 1

8.00 9.95 12.7 14.7

2.01 2.42 3.20 3.55

815 1 010 1 300 1 500

205 247 325 365

20

47 47 52 52

14 18 15 21

1 1 1.1 1.1

10.0 12.8 12.6 18.5

2.61 3.30 3.35 4.70

1 020 1 310 1 280 1 880

25

52 52 62 62

15 18 17 24

1 1 1.1 1.1

12.2 12.4 18.2 24.9

3.30 3.45 5.00 6.60

30

62 62 72 72

16 20 19 27

1 1 1.1 1.1

15.8 15.3 21.4 32.0

35

72 72 80 80

17 23 21 31

1.1 1.1 1.5 1.5

15.9 21.7 25.3 40.0

Cr

Cor

0.6 0.6 0.6 0.6

5.55 7.45 7.35 9.20

10 14 12 17

0.6 0.6 1 1

15

35 35 42 42

11 14 13 17

17

40 40 47 47

Abutment and fillet dimensions mm da Da ras min

max

max

― ― ― ―

14.0 14.0 14.0 14.0

26.0 26.0 31.0 31.0

0.6 0.6 0.6 0.6

1201S 2201S 1301S 2301S

― ― ― ―

16.0 16.0 17.0 17.0

28.0 28.0 32.0 32.0

0.6 0.6 1 1

22 000 22 000 20 000 18 000

1202S 2202S 1302S 2302S

― ― ― ―

19.0 19.0 20.0 20.0

31.0 31.0 37.0 37.0

0.6 0.6 1 1

16 000 16 000 14 000 13 000

20 000 20 000 17 000 16 000

1203S 2203S 1303S 2303S

― ― ― ―

21.0 21.0 22.0 22.0

36.0 36.0 42.0 42.0

0.6 0.6 1 1

266 340 340 480

14 000 14 000 12 000 11 000

17 000 17 000 15 000 14 000

1204S 2204S 1304S 2304S

1204SK 2204SK 1304SK 2304SK

25.0 25.0 26.5 26.5

42.0 42.0 45.5 45.5

1 1 1 1

1 250 1 270 1 850 2 530

335 350 510 675

12 000 12 000 10 000 9 500

14 000 14 000 13 000 12 000

1205S 2205S 1305S 2305S

1205SK 2205SK 1305SK 2305SK

30.0 30.0 31.5 31.5

47.0 47.0 55.5 55.5

1 1 1 1

4.65 4.55 6.30 8.75

1 610 1 560 2 190 3 250

475 460 645 895

10 000 10 000 8 500 8 000

12 000 12 000 11 000 10 000

1206S 2206S 1306S 2306S

1206SK 2206SK 1306SK 2306SK

35.0 35.0 36.5 36.5

57.0 57.0 65.5 65.5

1 1 1 1

5.10 6.60 7.85 11.3

1 620 2 210 2 580 4 100

520 675 800 1 150

8 500 8 500 7 500 7 100

10 000 10 000 9 500 9 000

1207S 2207S 1307S 2307S

1207SK 2207SK 1307SK 2307SK

41.5 41.5 43.0 43.0

65.5 65.5 72.0 72.0

1 1 1.5 1.5

1)Smallest allowable dimension for chamfer dimension r. 2)"K" indicates bearings have tapered bore with a taper ratio of 1: 12.

B-66


● Self-Aligning Ball Bearings

Equivalent bearing load dynamic Pr=XFr+YFa Fa Fa Fr ≦e Fr >e X Y X Y 1 Y1 0.65 Y2 static Por=Fr+Yo Fa For values of e, Y1, Y2 and Yo see the table below.

Constant

Axial load factors

e

Y1

0.32 0.64 0.35 0.71

2.00 0.98 1.80 0.89

0.36 0.58 0.33 0.60

Y2

Mass kg Yo

(approx.)

3.10 1.50 2.80 1.40

2.10 1.00 1.90 0.93

0.033 0.042 0.057 0.077

1.80 1.10 1.90 1.10

2.70 1.70 2.90 1.60

1.80 1.10 2.00 1.10

0.039 0.048 0.066 0.082

0.32 0.50 0.33 0.51

2.00 1.30 1.90 1.20

3.10 1.90 2.90 1.90

2.10 1.30 2.00 1.30

0.051 0.055 0.093 0.108

0.31 0.50 0.32 0.51

2.00 1.30 2.00 1.20

3.10 1.90 3.10 1.90

2.10 1.30 2.10 1.30

0.072 0.085 0.130 0.150

0.29 0.47 0.29 0.50

2.20 1.30 2.20 1.20

3.40 2.10 3.40 1.90

2.30 1.40 2.30 1.30

0.120 0.133 0.15 0.193

0.28 0.41 0.28 0.47

2.30 1.50 2.30 1.40

3.50 2.40 3.50 2.10

2.40 1.60 2.40 1.40

0.140 0.150 0.255 0.319

0.25 0.38 0.26 0.44

2.50 1.60 2.40 1.40

3.90 2.50 3.70 2.20

2.60 1.70 2.50 1.50

0.220 0.249 0.385 0.480

0.23 0.37 0.26 0.46

2.70 1.70 2.50 1.40

4.20 2.60 3.80 2.10

2.80 1.80 2.60 1.40

0.320 0.378 0.510 0.642

B-67


● Self-Aligning Ball Bearings

B ra

r

ra

r φd

φd

φD

Cylindrical bore

φDa

φda

Tapered bore

d 40 ∼ 75mm Boundary dimensions mm d

D

B

rs min1)

40

80 80 90 90

18 23 23 33

1.1 1.1 1.5 1.5

45

85 85 100 100

19 23 25 36

50

90 90 110 110

Basic load ratings dynamic static dynamic static kN kgf

Limiting speeds

Bearing numbers

min-1 cylindrical tapered2) bore bore

Cor

Cr

Cor

grease

oil

19.3 22.4 29.8 45.5

6.50 7.35 9.70 13.5

1 970 2 290 3 050 4 650

665 750 990 1 380

7 500 7 500 6 700 6 300

9 000 9 000 8 500 8 000

1208S 2208S 1308S 2308S

1.1 1.1 1.5 1.5

22.0 23.3 38.5 55.0

7.35 8.15 12.7 16.7

2 240 2 380 3 900 5 600

750 830 1 300 1 700

7 100 7 100 6 000 5 600

8 500 8 500 7 500 7 100

20 23 27 40

1.1 1.1 2 2

22.8 23.3 43.5 65.0

8.10 8.45 14.1 20.2

2 330 2 380 4 450 6 650

830 865 1 440 2 060

6 300 6 300 5 600 5 000

55

100 100 120 120

21 25 29 43

1.5 1.5 2 2

26.9 26.7 51.5 76.5

10.0 9.90 17.9 24.0

2 750 2 720 5 250 7 800

1 020 1 010 1 820 2 450

60

110 110 130 130

22 28 31 46

1.5 1.5 2.1 2.1

30.5 34.0 57.5 88.5

11.5 12.6 20.8 28.3

3 100 3 500 5 900 9 000

65

120 120 140 140

23 31 33 48

1.5 1.5 2.1 2.1

31.0 43.5 62.5 97.0

12.5 16.4 22.9 32.5

70

125 125 150 150

24 31 35 51

1.5 1.5 2.1 2.1

35.0 44.0 75.0 111

75

130 130 160 160

25 31 37 55

1.5 1.5 2.1 2.1

39.0 44.5 80.0 125

Cr

Abutment and fillet dimensions mm da Da ras min

max

max

1208SK 2208SK 1308SK 2308SK

46.5 46.5 48.0 48.0

73.5 73.5 82.0 82.0

1 1 1.5 1.5

1209S 2209S 1309S 2309S

1209SK 2209SK 1309SK 2309SK

51.5 51.5 53.0 53.0

78.5 78.5 92.0 92.0

1 1 1.5 1.5

8 000 8 000 6 700 6 300

1210S 2210S 1310S 2310S

1210SK 2210SK 1310SK 2310SK

56.5 83.5 56.5 83.5 59.0 101 59.0 101

1 1 2 2

6 000 6 000 5 000 4 800

7 100 7 100 6 300 6 000

1211S 2211S 1311S 2311S

1211SK 2211SK 1311SK 2311SK

63.0 92.0 63.0 92.0 64.0 111 64.0 111

1.5 1.5 2 2

1 180 1 290 2 130 2 880

5 300 5 300 4 500 4 300

6 300 6 300 5 600 5 300

1212S 2212S 1312S 2312S

1212SK 2212SK 1312SK 2312SK

68.0 68.0 71.0 71.0

102 102 119 119

1.5 1.5 2 2

3 150 4 450 6 350 9 900

1 280 1 670 2 330 3 300

4 800 4 800 4 300 3 800

6 000 6 000 5 300 4 800

1213S 2213S 1313S 2313S

1213SK 2213SK 1313SK 2313SK

73.0 73.0 76.0 76.0

112 112 129 129

1.5 1.5 2 2

13.8 17.1 27.7 37.5

3 550 4 500 7 650 11 300

1 410 1 740 2 830 3 850

4 800 4 500 4 000 3 600

5 600 5 600 5 000 4 500

1214S 2214S 1314S 2314S

― ― ― ―

78.0 78.0 81.0 81.0

117 117 139 139

1.5 1.5 2 2

15.7 17.8 30.0 43.0

4 000 4 550 8 150 12 700

1 600 1 820 3 050 4 400

4 300 4 300 3 800 3 400

5 300 5 300 4 500 4 300

1215S 2215S 1315S 2315S

1215SK 2215SK 1315SK 2315SK

83.0 83.0 86.0 86.0

122 122 149 149

1.5 1.5 2 2

1)Smallest allowable dimension for chamfer dimension r. 2)"K" indicates bearings have tapered bore with a taper ratio of 1: 12.

B-68


● Self-Aligning Ball Bearings

Equivalent bearing load dynamic Pr=XFr+YFa Fa Fa Fr ≦e Fr >e X Y X Y 1 Y1 0.65 Y2 static Por=Fr+Yo Fa For values of e, Y1, Y2 and Yo see the table below.

Constant

e

Axial load factors

Y1

Y2

Mass kg Yo

(approx.)

0.22 0.33 0.24 0.43

2.8 1.9 2.6 1.5

4.3 3.0 4.0 2.3

2.9 2.0 2.7 1.5

0.415 0.477 0.715 0.889

0.21 0.30 0.25 0.41

3.0 2.1 2.6 1.5

4.7 3.2 4.0 2.4

3.1 2.2 2.7 1.6

0.465 0.522 0.955 1.200

0.21 0.28 0.23 0.42

3.1 2.2 2.7 1.5

4.7 3.4 4.2 2.3

3.2 2.3 2.8 1.6

0.525 0.564 1.250 1.580

0.20 0.28 0.23 0.41

3.2 2.3 2.7 1.5

4.9 3.5 4.2 2.4

3.3 2.4 2.8 1.6

0.705 0.746 1.600 2.030

0.18 0.28 0.23 0.40

3.4 2.3 2.8 1.6

5.3 3.5 4.3 2.4

3.6 2.4 2.9 1.6

0.900 1.030 2.030 2.570

0.17 0.28 0.23 0.39

3.7 2.3 2.7 1.6

5.7 3.5 4.2 2.5

3.8 2.4 2.9 1.7

1.150 1.400 2.540 3.200

0.18 0.26 0.22 0.38

3.4 2.4 2.8 1.7

5.3 3.7 4.4 2.6

3.6 2.5 3.0 1.8

1.300 1.520 3.190 3.900

0.17 0.25 0.22 0.38

3.6 2.5 2.8 1.6

5.6 3.9 4.4 2.5

3.8 2.6 2.9 1.7

1.410 1.600 3.650 4.770

B-69


● Self-Aligning Ball Bearings

B ra

r

ra

r φd

φd

φD

Cylindrical bore

φDa

φda

Tapered bore

d 80 ∼ 110mm Boundary dimensions mm d

D

B

rs min1)

80

140 140 170 170

26 33 39 58

85

150 150 180 180

Basic load ratings dynamic static dynamic static kN kgf

Limiting speeds

Bearing numbers

min-1 cylindrical tapered2) bore bore

Cor

grease

oil

4 100 5 000 9 100 13 200

1 730 2 030 3 400 4 600

4 000 4 000 3 600 3 200

5 000 5 000 4 300 4 000

1216S 2216S 1316S 2316S

1216SK 2216SK 1316SK 2316SK

20.8 23.6 38.0 51.5

5 050 5 950 10 000 14 500

2 120 2 400 3 850 5 250

3 800 3 800 3 400 3 000

4 500 4 800 4 000 3 800

1217S 2217S 1317S 2317S

57.5 70.5 117 154

23.5 28.7 44.5 57.5

5 850 7 200 12 000 15 700

2 400 2 930 4 550 5 850

3 600 3 600 3 200 2 800

4 300 4 300 3 800 3 600

2.1 2.1 3 3

64.0 84.0 129 161

27.1 34.5 51.0 64.5

6 550 8 550 13 200 16 400

2 770 3 500 5 200 6 550

3 400 3 400 3 000 2 800

34 46 47 73

2.1 2.1 3 3

69.5 94.5 140 187

29.7 38.5 57.5 79.0

7 100 9 650 14 300 19 100

3 050 3 900 5 850 8 050

105

190 190 225 225

36 50 49 77

2.1 2.1 3 3

75.0 109 154 200

32.5 45.0 64.5 87.0

7 650 11 100 15 700 20 400

110

200 200 240 240

38 53 50 80

2.1 2.1 3 3

87.0 122 161 211

38.5 51.5 72.5 94.5

8 900 12 500 16 400 21 600

Cr

Cor

2 2 2.1 2.1

40.0 49.0 89.0 130

17.0 19.9 33.0 45.0

28 36 41 60

2 2 3 3

49.5 58.5 98.5 142

90

160 160 190 190

30 40 43 64

2 2 3 3

95

170 170 200 200

32 43 45 67

100

180 180 215 215

Cr

Abutment and fillet dimensions mm da Da ras max

max

89 89 91 91

131 131 159 159

2 2 2 2

1217SK 2217SK 1317SK 2317SK

94 94 98 98

141 141 167 167

2 2 2.5 2.5

1218S 2218S 1318S 2318S

1218SK 2218SK 1318SK 2318SK

99 99 103 103

151 151 177 177

2 2 2.5 2.5

4 000 4 000 3 600 3 400

1219S 2219S 1319S 2319S

1219SK 2219SK 1319SK 2319SK

106 106 108 108

159 159 187 187

2 2 2.5 2.5

3 200 3 200 2 800 2 400

3 800 3 800 3 400 3 200

1220S 2220S 1320S 2320S

1220SK 2220SK 1320SK 2320SK

111 111 113 113

169 169 202 202

2 2 2.5 2.5

3 300 4 550 6 600 8 850

3 000 3 000 2 600 2 400

3 600 3 600 3 200 3 000

1221S 2221S 1321S 2321S

― ― ― ―

116 116 118 118

179 179 212 212

2 2 2.5 2.5

3 950 5 250 7 300 9 650

2 800 2 800 2 400 2 200

3 400 3 400 3 000 2 800

1222S 1222SK 2222S 2222SK 1322S 1322SK 2322S3) 2322SK

121 121 123 123

189 189 227 227

2 2 2.5 2.5

1)Smallest allowable dimension for chamfer dimension r. 2)"K" indicates bearings have tapered bore with a taper ratio of 1: 12. 3)Machined cage is standard for 2322S (K).

B-70

min


● Self-Aligning Ball Bearings

Equivalent bearing load dynamic Pr=XFr+YFa Fa Fa Fr ≦e Fr >e X Y X Y 1 Y1 0.65 Y2 static Por=Fr+Yo Fa For values of e, Y1, Y2 and Yo see the table below.

Constant

Axial load factors

Mass kg

e

Y1

Y2

Yo

0.16 0.25 0.22 0.39

3.9 2.5 2.9 1.6

6.0 3.9 4.5 2.5

4.1 2.7 3.1 1.7

1.73 1.97 4.31 5.54

0.17 0.25 0.21 0.37

3.7 2.5 2.9 1.7

5.7 3.9 4.6 2.6

3.8 2.6 3.1 1.8

2.09 2.48 5.13 6.56

0.17 0.27 0.22 0.38

3.8 2.4 2.8 1.7

5.8 3.7 4.3 2.6

3.9 2.5 2.9 1.7

2.55 3.13 5.94 7.76

0.17 0.27 0.23 0.38

3.7 2.4 2.8 1.7

5.8 3.7 4.3 2.6

3.9 2.5 2.9 1.8

3.21 3.87 6.84 9.01

0.17 0.27 0.24 0.38

3.6 2.4 2.7 1.7

5.6 3.7 4.1 2.6

3.8 2.5 2.8 1.8

3.82 4.53 8.46 11.6

0.18 0.28 0.23 0.38

3.6 2.3 2.7 1.7

5.5 3.5 4.2 2.6

3.7 2.4 2.9 1.7

4.52 5.64 10.0 14.4

0.18 0.28 0.22 0.37

3.7 2.2 2.8 1.7

5.7 3.5 4.4 2.6

3.9 2.3 3.0 1.8

5.33 6.64 12.0 17.4

(approx.)

B-71


● Adapters (for self-aligning ball bearings) B2 ra

S1

B1 φd1 φd2

φdb φda

φDa

d 17 ∼ 50mm Boundary dimensions mm

Bearing numbers da

d1

B1

d2

B2

17

24 28 28 31

32 32 32 32

7 7 7 7

1204SK;H 204 2204SK;H 304 1304SK;H 304 2304SK;H2304

23 24 24 24

20

26 29 29 35

38 38 38 38

8 8 8 8

1205SK;H 205X 2205SK;H 305X 1305SK;H 305X 2305SK;H2305X

25

27 31 31 38

45 45 45 45

8 8 8 8

30

29 35 35 43

52 52 52 52

35

31 36 36 46

min

Abutment and fillet dimensions mm db S1 Da max

Mass1) kg ras

min

max

max

27 28 31 28

5 5 8 5

41 41 45 45

1 1 1 1

0.041 0.045 0.045 0.049

28 29 29 29

33 33 37 34

5 5 6 5

46 46 55 55

1 1 1 1

0.07 0.075 0.075 0.087

1206SK;H 206X 2206SK;H 306X 1306SK;H 306X 2306SK;H2306X

33 34 34 35

39 39 44 40

5 5 6 5

56 56 65 65

1 1 1 1

0.099 0.109 0.109 0.126

9 9 9 9

1207SK;H 207X 2207SK;H 307X 1307SK;H 307X 2307SK;H2307X

38 39 39 40

46 45 50 46

5 5 7 5

65 65 71.5 71.5

1 1 1.5 1.5

0.125 0.142 0.142 0.165

58 58 58 58

10 10 10 10

1208SK;H 208X 2208SK;H 308X 1308SK;H 308X 2308SK;H2308X

44 44 44 45

52 50 56 52

5 5 5 5

73 73 81.5 81.5

1 1 1.5 1.5

0.174 0.189 0.189 0.224

40

33 39 39 50

65 65 65 65

11 11 11 11

1209SK;H 209X 2209SK;H 309X 1309SK;H 309X 2309SK;H2309X

49 49 49 50

57 57 61 58

5 8 5 5

78 78 91.5 91.5

1 1 1.5 1.5

0.227 0.248 0.248 0.28

45

35 42 42 55

70 70 70 70

12 12 12 12

1210SK;H 210X 2210SK;H 310X 1310SK;H 310X 2310SK;H2310X

53 54 54 56

62 63 67 65

5 10 5 5

1 1 2 2

0.274 0.303 0.303 0.362

50

37

75

12

1211SK;H 211X

60

70

6

1.5

0.308

83 83 100 100 91.5

1)Refers to adapter mass. Note: 1. For bearing dimensions, basic rated loads, and mass, refer to pages B-68 to B-70. 2. Adapters for series 12 bearings can also be used with H2 and H3 series bearings. Caution: the B1 dimension of H3 series bearings is longer than that of H2 series bearings. 3. Adapter numbers which are appended with the code "X" indicate narrow slit type adapters which use washer with straight inner tabs. 4. For adapter locknut and washer dimensions, please refer to pages C-2 to C-7, and C-12 to C-14.

B-72

(approx.)


● Adapters (for self-aligning ball bearings) B2 ra

S1

B1 φd1 φd2

φdb φda

φDa

d 50 ∼ 85mm Boundary dimensions mm

Bearing numbers da

d1

B1

d2

B2

50

45 45 59

75 75 75

12 12 12

2211SK;H 311X 1311SK;H 311X 2311SK;H2311X

60 60 61

55

38 47 47 62

80 80 80 80

13 13 13 13

1212SK;H 212X 2212SK;H 312X 1312SK;H 312X 2312SK;H2312X

60

40 50 50 65

85 85 85 85

14 14 14 14

65

43 55 55 73

98 98 98 98

70

46 59 59 78

min

Abutment and fillet dimensions mm db S1 Da max

Mass1) kg ras

min

max

max

69 73 71

11 6 6

91.5 110 110

1.5 2 2

0.345 0.345 0.42

64 65 65 66

76 75 79 77

5 9 5 5

101.5 101.5 118 118

1.5 1.5 2 2

0.346 0.394 0.394 0.481

1213SK;H 213X 2213SK;H 313X 1313SK;H 313X 2313SK;H2313X

70 70 70 72

83 81 85 84

5 8 5 5

111.5 111.5 128 128

1.5 1.5 2 2

0.401 0.458 0.458 0.557

15 15 15 15

1215SK;H 215X 2215SK;H 315X 1315SK;H 315X 2315SK;H2315X

80 80 80 82

93 93 97 96

5 12 5 5

121.5 121.5 148 148

1.5 1.5 2 2

0.707 0.831 0.831 1.05

105 105 105 105

17 17 17 17

1216SK;H 216X 2216SK;H 316X 1316SK;H 316X 2316SK;H2316X

85 86 86 87

100 98 103 103

5 12 5 5

130 130 158 158

2 2 2 2

0.882 1.03 1.03 1.28

75

50 63 63 82

110 110 110 110

18 18 18 18

1217SK;H 217X 2217SK;H 317X 1317SK;H 317X 2317SK;H2317X

90 91 91 94

106 104 110 110

6 12 6 6

140 140 166 166

2 2 2.5 2.5

1.02 1.18 1.18 1.45

80

52 65 65 86

120 120 120 120

18 18 18 18

1218SK;H 218X 2218SK;H 318X 1318SK;H 318X 2318SK;H2318X

95 96 96 99

111 112 116 117

6 10 6 6

150 150 176 176

2 2 2.5 2.5

1.19 1.37 1.37 1.69

85

55 68

125 125

19 19

1219SK;H 219X 2219SK;H 319X

101 102

118 117

7 9

158 158

2 2

1.37 1.56

1)Refers to adapter mass. Note: 1. For bearing dimensions, basic rated loads, and mass, refer to pages B-70 to B-72. 2. Adapters for series 12 bearings can also be used with H2 and H3 series bearings. Caution: the B1 dimension of H3 series bearings is longer than that of H2 series bearings. 3. Adapter numbers which are appended with the code "X" indicate narrow slit type adapters which use washer with straight inner tabs. 4. For adapter locknut and washer dimensions, please refer to pages C-2 to C-7, and C-12 to C-14.

B-73

(approx.)


● Adapters (for self-aligning ball bearings) B2 ra

S1

B1 φd1 φd2

φdb φda

φDa

d 85 ∼ 100mm Boundary dimensions mm

Bearing numbers da

d1

B1

d2

B2

85

68 90

125 125

19 19

90

58 71 71 97

130 130 130 130

100

63 77 77 105

145 145 145 145

Abutment and fillet dimensions mm db S1 Da

min

max

min

1319SK;H 319X 2319SK;H2319X

102 105

123 123

20 20 20 20

1220SK;H 220X 2220SK;H 320X 1320SK;H 320X 2320SK;H2320X

106 107 107 110

21 21 21 21

1222SK;H 222X 2222SK;H 322X 1322SK;H 322X 2322SK;H2322X

116 117 117 121

Mass1) kg ras

max

max

(approx.)

7 7

186 186

2.5 2.5

1.56 1.92

125 123 130 129

7 8 7 7

168 168 201 201

2 2 2.5 2.5

1.49 1.69 1.69 2.15

138 137 150 142

7 6 9 7

188 188 226 226

2 2 2.5 2.5

1.93 2.18 2.18 2.74

1)Refers to adapter mass. Note: 1. For bearing dimensions, basic rated loads, and mass, refer to pages B-72 to B-73. 2. Adapters for series 12 bearings can also be used with H2 and H3 series bearings. Caution: the B1 dimension of H3 series bearings is longer than that of H2 series bearings. 3. Adapter numbers which are appended with the code "X" indicate narrow slit type adapters which use washer with straight inner tabs. 4. For adapter locknut and washer dimensions, please refer to pages C-2 to C-7, and C-12 to C-14.

B-74


â—? Adapters

B-75


●Cylindrical Roller Bearings

Cylindrical roller bearing

E Type cylindrical roller bearing

Double row cylindrical roller bearing

Four row cylindrical roller bearing

1. Types, design features, and characteristics Since the rolling elements in cylindrical roller bearings make line contact with raceways, these bearings can accommodate heavy radial loads. The rollers are guided by ribs on either the inner or outer ring, therefore these bearings are also suitable for high speed applications. Furthermore, cylindrical roller bearings are separable, and relatively easy to install and disassemble even when interference fits are required. Among the various types of cylindrical roller bearings, Type E has a high load capacity and its boundary dimensions are identical to standard type. HT type has a

large axial load capacity, and HL type provides extended wear life in conditions where the development of a lubricating film inside the bearing is difficult. Double and multiple row bearing arrangements are also available. For extremely heavy load applications, the non-separable full complement SL type bearing offers special advantages. Table 1 shows the various types and characteristics of single row cylindrical roller bearings. Table 2 shows the characteristics of non-standard type cylindrical roller bearings.

Table 1 Cylindrical roller bearing types and characteristics Type code

NU type

Design

Characteristics

NU type

¡NU type outer rings have double ribs; outer ring and roller as well as cage can be separated from inner ring. N type inner ring have double ribs; inner ring and roller as well as cage can be separated from outer ring. ¡Unable to accommodate even the lightest axial loads. ¡This type is extremely suitable for, and widely used as, the floating side bearing.

N type

N type

NJ type

NJ type

NF type

¡NJ type has double ribs on outer ring, single rib on inner ring; NF type has single rib on outer ring, and double rib on inner ring. ¡Can receive single direction axial loads. ¡When there is no distinction between the fixed side and floating side bearing, can be used as a pair in close proximity.

NF type

NUP type NUP type

NH type (NJ + HJ)

¡NUP type has a collar ring attached to the ribless side of the inner ring; NH type is NJ type with an L type collar ring attached. All of these collar rings are separable, and therefore it is necessary to fix the inner ring axially. ¡Can accommodate axial loads in either direction. ¡Widely used as the shaft's fixed-side bearing.

NH type

B-77


●Cylindrical Roller Bearings

Table 2 Non-standard type cylindrical roller bearing characteristics Bearing type

Characteristics ¡Boundary dimensions are the same as the standard type, but the diameter, length and number of the rollers have been increased, as well as load capacity. ¡Identified by addition of "E" to end of basic roller number. ¡Enables compact design due to its high load rating. ¡Rollers' inscribed circle diameter differs from standard type rollers and therefore cannot be interchanged.

180mm

E Type cylindrical roller bearing

E type Standard type

100mm

NU2220E Cr=335kN E type bearing

NU320 Cr=299kN Standard type bearing

215mm

120mm

NU224E Cr=335kN E type bearing

Remarks: In the dimension tables, both E type and standard type are listed, but in the future JIS will change to E type. Large axial load use cylindrical roller bearings (HT type)

¡Can accommodate larger axial loads than standard type thanks to improved geometry of the rib roller end surface. ¡Please consult NTN Engineering concerning the many factors which require consideration, such as load, lubricant, and installation conditions.

Double row cylindrical roller bearings

¡NN type and NNU type available. ¡Widely used for applications requiring thin-walled bearings, such the main shafts of machine tools, rolling machine rollers, and in printing equipment. ¡Internal radial clearance is adjusted for the spindle of machine tools by pressing the tapered bore of the inner ring on a tapered shaft.

Four row cylindrical roller bearings

¡Used mainly in the necks of rolling machine rollers; designed for maximum rated load to accommodate the severely limited space in the roller neck section of such equipment. ¡Many varieties exist, including sealed types, which have been specially designed for high speed use, to prevent creeping, provide dust and water proofing properties, etc. Contact NTN Engineering.

SL type cylindrical roller bearings

¡Full complement roller bearing capable of handling heavy loads. ¡Consult NTN Engineering regarding special application designs for SL type cylindrical roller bearings.

2. Standard cage types

The basic road ratings listed in the dimension charts correspond to values achieved with the standard cages listed in Table 3. Furthermore, please note that even for the identical bearing, in cases where the number of rolling elements or the cage type differs, the basic rated load will also differ from the values listed in the dimension charts.

Table 3 shows the standard varieties for cylindrical roller bearings. Table 3 Standard cage types Bearing series

Molded resin cage

Pressed cage

Machined cage

NU10

1005∼10/500

NU 2 NU2E

― 204E∼218E

208∼230 ―

232∼264 219E∼240E

NU22 NU22E

― 2204E∼2218E

2208∼2230 ―

2232∼2264 2219E∼2240E

NU3 NU3E

304E∼314E

308∼324 ―

326∼356 315E∼332E

NU23 NU23E

― 2304E∼2311E

2308∼2320 ―

2322∼2356 2312E∼2332E

NU4

405∼416

Note: 1) Within the same bearing series, cage type is identical even if the type code (NJ, NUP, N, NF) differs. 2) For high speed and other special applications, machined cages can be manufactured when necessary. Consult NTN Engineering. 3) Among E type bearings (those using molded resin cages), certain varieties may also use pressed cages. Consult NTN Engineering. 4) Although machined cages are standard for two row and four row cylindrical roller bearings, molded resin cages may also be used in some of these bearings for machine tool applications. 5) Due to their material properties, molded resin cages cannot be used in applications where temperatures exceed 120˚C. #04 - #07 however use resin material with superior ability to withstand heat and high temperatures, which are capable of withstanding temperatures up to 150˚C. 6) Formed resin cages capable of withstanding temperatures up to 150˚C can be manufactured by request for type E (formed resin cage) of #08 or greater. For information, please contact NTN Engineering.

B-78


●Cylindrical Roller Bearings

3. Allowable misalignment

are to support an axial load or moment load simultaneously, please contact NTN Engineering.

Although values vary somewhat depending on bearing type and internal specifications, under general load conditions, to avoid the occurrence of edge loading, allowable misalignments have been set as follows:

NTN Engineering also offers cylindrical roller bearings for high axial loads (HT type). For details, please contact NTN Engineering.

MPa

Bearing width series 0 or 1: ⋯⋯⋯⋯⋯⋯0.001 rad (3.5') Bearing width series 2: ⋯⋯⋯⋯⋯⋯⋯⋯0.0005 rad (1.5') Double row cylindrical roller bearings 1 :⋯⋯0.0005 rad (1.5')

100

Co

50

d loa

Allowable surface pressure Pz

150

oad ial al l ax axi nt itte erm Int

Cylindrical roller bearings with ribs on the inner and outer rings are capable of simultaneously bearing a radial load and an axial load of a certain degree. Unlike basic road ratings based on rolling fatigue, allowable axial load is determined by heat produced on the sliding surface between the ends of the rollers and rib, seizure and wear. Allowable axial load when center axial load is applied is approximately determined by formula (1), which is based upon experience and testing.

Grease lubrication

ary

4. Allowable axial load for cylindrical roller bearings

Primarily oil lubrication

Grease or oil lubrication

nt me Mo

1 Does not include high precision bearings for machine tool main shaft applications.

200

nst

ant

axi

al l

oad

0 0

5

10 15 20 25 30 4 ×10 mm・min-1 dp・n

dp:Roller pitch diameter mm dp≒(bearing bore + bearing outside diameter)/2 mm n:Rotational speed min-1 Diagram 1 Allowable surface pressure of rib

Pt = k ・ d2 ・ Pz …………………(1)

Table 4 Factor k values and allowable axial load (Fa max) Bearing series NJ, NUP10 NJ, NUP, NF, NH2, NJ, NUP, NH22 NJ, NUP, NF, NH3, NJ, NUP, NH23 NJ, NUP, NH2E, NJ, NUP, NH22E NJ, NUP, NH3E, NJ, NUP, NH23E NJ, NUP, NH4, SL01-48 SL01-49 SL04-50

Where: Pt : Allowable axial load when rotating N {kgf} k : Factor determined by internal design of bearing (see Table 4) d : Bearing bore mm Pz : Allowable surface pressure of rib MPa {kgf/mm2} (see Diagram 1) If axial load is greater than radial load, the rollers will not rotate properly. The allowable axial load therefore must not exceed the value for Fa max given in Table 4. The following are also important to operate the bearing smoothly under axial load: (1) Do not make the internal radial clearance any larger than necessary. (2) Use lubricant with extreme pressure additive. (3) Make the shoulder of the housing and shaft high enough for the rib of the bearing. (4) If the bearing is to support an extreme axial load, mounting precision should be improved and the bearing should rotate slowly before actual use. If large cylindrical roller bearings (bore of 300 mm or more)

B-79

k

Fa

0.040

0.4Fr

0.065

0.4Fr

0.050

0.4Fr

0.080

0.4Fr

0.100 0.022 0.034 0.044

0.4Fr 0.2Fr 0.2Fr 0.2Fr

max


● Cylindrical Roller Bearings

B

B r

r1 r

r1

φD

φd φFW

Type NU

r1

φJ

r1

r

φJ

Type NJ

r

r1

r

φD φEW

Type NUP

φd φJ

Type N

Type NF

d 20 ∼ 40mm Boundary dimensions mm B

rs min3)

Basic load ratings dynamic static dynamic static kN kgf r1s min3) Cr Cor Cr Cor

Limiting speeds1) min-1

type NJ

type NUP

type N

NU204E NU2204E NU304E NU2304E

NJ NJ NJ NJ

NUP NUP NUP NUP

― ― ― ―

19 000 15 000 13 000 13 000 11 000 10 000

NU1005 NU205E NU2205E NU305E NU2305E NU405

NJ NJ NJ NJ NJ NJ

NUP NUP NUP NUP NUP NUP

N ― ― ― ― N

14 000 11 000 9 700 9 300 8 300 7 300

16 000 13 000 11 000 11 000 9 700 8 500

NU1006 NU206E NU2206E NU306E NU2306E NU406

NJ NJ NJ NJ NJ NJ

NUP NUP NUP NUP NUP NUP

N ― ― ― ― N

2 360 5 100 6 650 7 200 11 100 7 050

12 000 9 500 8 500 8 100 7 200 6 400

15 000 11 000 10 000 9 600 8 500 7 500

NU1007 NU207E NU2207E NU307E NU2307E NU407

NJ NJ NJ NJ NJ NJ

NUP NUP NUP NUP NUP NUP

N ― ― ― ― N

2 950 4 350 5 650 6 300 7 900 5 800 8 300 8 950 12 500 9 100

11 000 9 400 8 500 8 500 7 600 8 000 7 200 7 000 6 400 5 700

13 000 11 000 10 000 10 000 8 900 9 400 8 500 8 200 7 500 6 700

NU1008 NU208 NU208E NU2208 NU2208E NU308 NU308E NU2308 NU2308E NU408

NJ NJ NJ NJ NJ NJ NJ NJ NJ NJ

NUP NUP NUP NUP NUP NUP NUP NUP NUP NUP

N N ― N ― N ― N ― N

grease

oil

2 310 2 890 2 740 3 950

15 000 14 000 13 000 12 000

18 000 16 000 15 000 14 000

1 540 2 990 3 550 4 250 5 800 4 750

1 430 2 830 3 550 3 800 5 700 4 050

16 000 13 000 11 000 11 000 9 700 8 500

19.6 37.5 50.0 50.0 77.5 55.0

2 000 4 000 5 000 5 400 7 600 6 400

2 000 3 800 5 100 5 100 7 900 5 600

22.6 50.5 61.5 71.0 99.0 75.5

23.2 50.0 65.5 71.0 109 69.0

2 310 5 150 6 300 7 200 10 100 7 700

27.3 43.5 55.5 58.0 72.5 58.5 83.0 82.5 114 95.5

29.0 43.0 55.5 62.0 77.5 57.0 81.5 88.0 122 89.0

2 780 4 450 5 700 5 950 7 400 6 000 8 500 8 400 11 600 9 750

d

D

20

47 47 52 52

14 18 15 21

1 1 1.1 1.1

0.6 0.6 0.6 0.6

25.7 30.5 31.5 42.0

22.6 28.3 26.9 39.0

2 620 3 100 3 200 4 300

25

47 52 52 62 62 80

12 15 18 17 24 21

0.6 1 1 1.1 1.1 1.5

0.3 0.6 0.6 1.1 1.1 1.5

15.1 29.3 35.0 41.5 57.0 46.5

14.1 27.7 34.5 37.5 56.0 40.0

30

55 62 62 72 72 90

13 16 20 19 27 23

1 1 1 1.1 1.1 1.5

0.6 0.6 0.6 1.1 1.1 1.5

19.7 39.0 49.0 53.0 74.5 62.5

35

62 72 72 80 80 100

14 17 23 21 31 25

1 1.1 1.1 1.5 1.5 1.5

0.6 0.6 0.6 1.1 1.1 1.5

40

68 80 80 80 80 90 90 90 90 110

15 18 18 23 23 23 23 33 33 27

1 1.1 1.1 1.1 1.1 1.5 1.5 1.5 1.5 2

0.6 1.1 1.1 1.1 1.1 1.5 1.5 1.5 1.5 2

Bearing numbers2)

1)This value achieved with machined cages; when pressed cages are used, 80% of this value is acceptable. 2)Production switched to E type only for bearing number for which there is no standard form. 3)Minimal allowable dimension for chamfer dimension r or r1.

B-80

type NU


● Cylindrical Roller Bearings

ra

r1a

r1a

ra

φda

φDa φdc

φdd

φde

φdc

φdb φDb

φDb

Dynamic equivalent radial load Pr=Fr Static equivalent radial load Por=Fr

Dimensions

Abutment and fillet dimensions

mm type NF

Fw

Ew

Mass

mm J

kg

da

db

dc

dd

de

Da

min

min

max

min

min

max

Db max

min4)

ras

r1as

max

max

type NU

type N

(approx.)

― ― ― ―

26.5 26.5 27.5 27.5

― ― ― ―

29.5 29.5 31.1 31.1

24 24 24 24

― ― ― ―

26 26 27 27

29 29 30 30

32 32 33 33

42 42 45.5 45.5

― ― ― ―

― ― ― ―

1 1 1 1

0.6 0.6 0.6 0.6

0.122 0.158 0.176 0.242

― ― ― ―

― ― ― ― ― NF

30.5 31.5 31.5 34 34 38.8

41.5 ― ― ― ― 62.8

32.7 34.5 34.5 38 38 43.6

27 29 29 31.5 31.5 33

29 ― ― ― ― 33

30 31 31 33 33 38

32 34 34 37 37 41

33 37 37 40 40 46

43 47 47 55.5 55.5 72

45 ― ― ― ― 72

42.5 ― ― ― ― 64

0.6 1 1 1 1 1.5

0.3 0.6 0.6 1 1 1.5

0.092 0.151 0.186 0.275 0.386 0.55

0.091 ― ― ― ― 0.536

― ― ― ― ― NF

36.5 37.5 37.5 40.5 40.5 45

48.5 ― ― ― ― 73

38.9 41.1 41.1 44.9 44.9 50.5

34 34 34 36.5 36.5 38

35 ― ― ― ― 38

35 37 37 40 40 44

38 40 40 44 44 47

39.5 44 44 48 48 52

50 57 57 65.5 65.5 82

51 ― ― ― ― 82

49.5 ― ― ― ― 74

1 1 1 1 1 1.5

0.6 0.6 0.6 1 1 1.5

0.13 0.226 0.297 0.398 0.58 0.751

0.128 ― ― ― ― 0.732

― ― ― ― ― NF

42 44 44 46.2 46.2 53

55 ― ― ― ― 83

44.6 48 48 51 51 59

39 39 39 41.5 41.5 43

40 ― ― ― ― 43

41 43 43 45 45 52

44 46 46 48 48 55

45 50 50 53 53 61

57 65.5 65.5 72 72 92

58 ― ― ― ― 92

56 ― ― ― ― 84

1 1 1 1.5 1.5 1.5

0.6 0.6 0.6 1 1 1.5

0.179 0.327 0.455 0.545 0.78 0.99

0.176 ― ― ― ― 0.965

― NF ― ― ― NF ― ― ― NF

47 50 49.5 50 49.5 53.5 52 53.5 52 58

61 70 ― 70 ― 77.5 ― 77.5 ― 92

49.8 54.2 53.9 54.2 53.9 58.4 57.6 58.4 57.6 64.8

44 46.5 46.5 46.5 46.5 48 48 48 48 49

45 46.5 ― 46.5 ― 48 ― 48 ― 49

46 49 49 49 49 51 51 51 51 57

49 52 52 52 52 55 55 55 55 60

50.5 56 56 56 56 60 60 60 60 67

63 73.5 73.5 73.5 73.5 82 82 82 82 101

64 73.5 ― 73.5 ― 82 ― 82 ― 101

62 72 ― 72 ― 80 ― 80 ― 93

1 1 1 1 1 1.5 1.5 1.5 1.5 2

0.6 1 1 1 1 1.5 1.5 1.5 1.5 2

0.22 0.378 0.426 0.49 0.552 0.658 0.754 0.951 1.06 1.3

0.217 0.37 ― 0.48 ― 0.643 ― 0.932 ― 1.27

4)Does not apply to side of the outer ring rib of type NF bearings.

B-81


● Cylindrical Roller Bearings

B

B r

r1 r

r1

φD

φd φFW

Type NU

r1

φJ

r1

r

φJ

Type NJ

r

r1

r

φD φEW

Type NUP

φd φJ

Type N

Type NF

d 45 ∼ 60mm Boundary dimensions mm B

rs min3)

Limiting speeds1)

Basic load ratings dynamic static dynamic static kN kgf r1s min3) Cr Cor Cr Cor

grease

oil

min-1

type NJ

type NUP

type N

NU1009 NU209 NU209E NU2209 NU2209E NU309 NU309E NU2309 NU2309E NU409

NJ NJ NJ NJ NJ NJ NJ NJ NJ NJ

NUP NUP NUP NUP NUP NUP NUP NUP NUP NUP

N N ― N ― N ― N ― N

11 000 9 000 8 100 8 100 7 300 7 700 6 900 6 700 6 100 5 500

NU1010 NU210 NU210E NU2210 NU2210E NU310 NU310E NU2310 NU2310E NU410

NJ NJ NJ NJ NJ NJ NJ NJ NJ NJ

NUP NUP NUP NUP NUP NUP NUP NUP NUP NUP

N N ― N ― N ― N ― N

8 200 6 900 6 300 6 300 5 600 5 900 5 300 5 200 4 700 4 300

9 700 8 200 7 400 7 400 6 600 7 000 6 300 6 100 5 600 5 000

NU1011 NU211 NU211E NU2211 NU2211E NU311 NU311E NU2311 NU2311E NU411

NJ NJ NJ NJ NJ NJ NJ NJ NJ NJ

NUP NUP NUP NUP NUP NUP NUP NUP NUP NUP

N N ― N ― N ― N ― N

7 500 6 400 5 800 5 800

8 800 7 600 6 800 6 800

NU1012 NU212 NU212E NU2212

NJ NJ NJ NJ

NUP NUP NUP NUP

N N ― N

d

D

45

75 85 85 85 85 100 100 100 100 120

16 19 19 23 23 25 25 36 36 29

1 1.1 1.1 1.1 1.1 1.5 1.5 1.5 1.5 2

0.6 1.1 1.1 1.1 1.1 1.5 1.5 1.5 1.5 2

31.0 46.0 63.0 61.5 76.0 74.0 97.5 99.0 137 107

34.0 47.0 66.5 68.0 84.5 71.0 98.5 104 153 102

3 200 4 700 6 450 6 250 7 750 7 550 9 950 10 100 14 000 10 900

3 450 4 800 6 800 6 900 8 600 7 250 10 000 10 600 15 600 10 400

9 900 8 400 7 600 7 600 6 800 7 200 6 500 6 300 5 700 5 100

12 000 9 900 9 000 9 000 8 000 8 400 7 600 7 400 6 800 6 000

50

80 90 90 90 90 110 110 110 110 130

16 20 20 23 23 27 27 40 40 31

1 1.1 1.1 1.1 1.1 2 2 2 2 2.1

0.6 1.1 1.1 1.1 1.1 2 2 2 2 2.1

32.0 48.0 66.0 64.0 79.5 87.0 110 121 163 129

36.0 51.0 72.0 73.5 91.5 86.0 113 131 187 124

3 300 4 900 6 750 6 550 8 100 8 850 11 200 12 300 16 600 13 200

3 700 5 200 7 350 7 500 9 350 8 800 11 500 13 400 19 000 12 600

8 900 7 600 6 900 6 900 6 200 6 500 5 900 5 700 5 200 4 700

55

90 100 100 100 100 120 120 120 120 140

18 21 21 25 25 29 29 43 43 33

1.1 1.5 1.5 1.5 1.5 2 2 2 2 2.1

1 1.1 1.1 1.1 1.1 2 2 2 2 2.1

37.5 58.0 82.5 75.5 97.0 111 137 148 201 139

44.0 62.5 93.0 87.0 114 111 143 162 233 138

3 850 5 900 8 400 7 700 9 900 11 300 14 000 15 100 20 500 14 200

4 450 6 350 9 500 8 900 11 700 11 400 14 600 16 500 23 800 14 100

60

95 110 110 110

18 22 22 28

1.1 1.5 1.5 1.5

1 1.5 1.5 1.5

40.0 68.5 97.5 96.0

48.5 75.0 107 116

4 100 7 000 9 950 9 800

4 950 7 650 10 900 11 800

1)This value achieved with machined cages; when pressed cages are used, 80% of this value is acceptable. 2)Production switched to E type only for bearing number for which there is no standard form. 3)Minimal allowable dimension for chamfer dimension r or r1.

B-82

Bearing numbers2) type NU


● Cylindrical Roller Bearings

ra

r1a

r1a

ra

φda

φDa φdc

φdd

φde

φdc

φdb φDb

φDb

Dynamic equivalent radial load Pr=Fr Static equivalent radial load Por=Fr

Dimensions

Abutment and fillet dimensions

mm type NF

Fw

Ew

Mass

mm J

kg

da

db

dc

dd

de

Da

min

min

max

min

min

max

Db max

min4)

ras

r1as

max

max

type NU

type N

(approx.)

― NF ― ― ― NF ― ― ― NF

52.5 55 54.5 55 54.5 58.5 58.5 58.5 58.5 64.5

67.5 75 ― 75 ― 86.5 ― 86.5 ― 100.5

55.5 59 58.9 59 58.9 64 64.5 64 64.5 71.8

49 51.5 51.5 51.5 51.5 53 53 53 53 54

50 51.5 ― 51.5 ― 53 ― 53 ― 54

52 54 54 54 54 57 57 57 57 63

54 57 57 57 57 60 60 60 60 66

56 61 61 61 61 66 66 66 66 74

70 78.5 78.5 78.5 78.5 92 92 92 92 111

71 68.5 78.5 77 ― ― 78.5 77 ― ― 92 89 ― ― 92 89 ― ― 111 102

1 1 1 1 1 1.5 1.5 1.5 1.5 2

0.6 1 1 1 1 1.5 1.5 1.5 1.5 2

0.28 0.432 0.495 0.53 0.6 0.877 0.996 1.27 1.41 1.62

0.276 0.423 ― 0.52 ― 0.857 ― 1.24 ― 1.58

― NF ― ― ― NF ― ― ― NF

57.5 60.4 59.5 60.4 59.5 65 65 65 65 70.8

72.5 80.4 ― 80.4 ― 95 ― 95 ― 110.8

60.5 64.6 63.9 64.6 63.9 71 71.4 71 71.4 78.8

54 56.5 56.5 56.5 56.5 59 59 59 59 61

55 56.5 ― 56.5 ― 59 ― 59 ― 61

57 58 58 58 58 63 63 63 63 69

59 62 62 62 62 67 67 67 67 73

61 67 67 67 67 73 73 73 73 81

75 83.5 83.5 83.5 83.5 101 101 101 101 119

76 73.5 83.5 83 ― ― 83.5 83 ― ― 101 98 ― ― 101 98 ― ― 119 112

1 1 1 1 1 2 2 2 2 2

0.6 1 1 1 1 2 2 2 2 2

0.295 0.47 0.54 0.571 0.652 1.14 1.3 1.7 1.9 2.02

0.291 0.46 ― 0.56 ― 1.11 ― 1.67 ― 1.97

― NF ― ― ― NF ― ― ― NF

64.5 66.5 66 66.5 66 70.5 70.5 70.5 70.5 77.2

80.5 88.5 ― 88.5 ― 104.5 ― 104.5 ― 117.2

67.7 70.8 70.8 70.8 70.8 77.2 77.7 77.2 77.7 85.2

60 61.5 61.5 61.5 61.5 64 64 64 64 66

61.5 63 ― 63 ― 64 ― 64 ― 66

63 65 65 65 65 69 69 69 69 76

66 68 68 68 68 72 72 72 72 79

68.5 73 73 73 73 80 80 80 80 87

83.5 92 92 92 92 111 111 111 111 129

85 81.5 93.5 91 ― ― 93.5 91 ― ― 111 107 ― ― 111 107 ― ― 129 119

1 1.5 1.5 1.5 1.5 2 2 2 2 2

1 1 1 1 1 2 2 2 2 2

0.442 0.638 0.718 0.773 0.968 1.45 1.65 2.17 2.37 2.48

0.435 0.626 ― 0.758 ― 1.42 ― 2.13 ― 2.42

― NF ― ―

69.5 73.5 72 73.5

85.5 97.5 ― 97.5

72.7 78.4 77.6 78.4

65 68 68 68

66.5 68 ― 68

68 71 71 71

71 75 75 75

73.5 80 80 80

88.5 102 102 102

90 102 ― 102

1 1.5 1.5 1.5

1 1.5 1.5 1.5

0.474 0.818 0.923 1.06

0.467 0.802 ― 1.04

4)Does not apply to side of the outer ring rib of type NF bearings.

B-83

86.5 100 ― 100


● Cylindrical Roller Bearings

B

B r

r1 r

r1

φD

φd φFW

r1

φJ

Type NU

r1

r

φJ

Type NJ

r

r1

r

φD φEW

Type NUP

φd φJ

Type N

Type NF

d 60 ∼ 75mm Boundary dimensions mm B

rs min3)

Limiting speeds1)

Basic load ratings dynamic static dynamic static kN kgf r1s min3) Cr Cor Cr Cor

grease

oil

min-1

type NJ

type NUP

type N

NU2212E NU312 NU312E NU2312 NU2312E NU412

NJ NJ NJ NJ NJ NJ

NUP NUP NUP NUP NUP NUP

― N ― N ― N

8 200 7 000 6 300 6 300 5 600 6 000 5 400 5 200 4 800 4 300

NU1013 NU213 NU213E NU2213 NU2213E NU313 NU313E NU2313 NU2313E NU413

NJ NJ NJ NJ NJ NJ NJ NJ NJ NJ

NUP NUP NUP NUP NUP NUP NUP NUP NUP NUP

N N ― N ― N ― N ― N

6 500 5 500 5 000 5 000 4 500 4 700 4 200 4 100 3 800 3 400

7 600 6 500 5 900 5 900 5 200 5 500 5 000 4 800 4 400 4 000

NU1014 NU214 NU214E NU2214 NU2214E NU314 NU314E NU2314 NU2314E NU414

NJ NJ NJ NJ NJ NJ NJ NJ NJ NJ

NUP NUP NUP NUP NUP NUP NUP NUP NUP NUP

N N ― N ― N ― N ― N

6 100 5 100 4 700 4 700 4 200 4 400 4 000 3 800

7 100 6 000 5 500 5 500 4 900 5 200 4 700 4 500

NU1015 NU215 NU215E NU2215 NU2215E NU315 NU315E NU2315

NJ NJ NJ NJ NJ NJ NJ NJ

NUP NUP NUP NUP NUP NUP NUP NUP

N N ― N ― N ― N

d

D

60

110 130 130 130 130 150

28 31 31 46 46 35

1.5 2.1 2.1 2.1 2.1 2.1

1.5 2.1 2.1 2.1 2.1 2.1

131 124 150 169 222 167

157 126 157 188 262 168

13 400 12 600 15 200 17 200 22 700 17 100

16 000 12 900 16 000 19 200 26 700 17 200

5 200 5 500 4 900 4 800 4 400 3 900

6 100 6 500 5 800 5 700 5 200 4 600

65

100 120 120 120 120 140 140 140 140 160

18 23 23 31 31 33 33 48 48 37

1.1 1.5 1.5 1.5 1.5 2.1 2.1 2.1 2.1 2.1

1 1.5 1.5 1.5 1.5 2.1 2.1 2.1 2.1 2.1

41.0 84.0 108 120 149 135 181 188 248 182

51.0 94.5 119 149 181 139 191 212 287 186

4 200 8 550 11 000 12 200 15 200 13 800 18 400 19 100 25 200 18 600

5 200 9 650 12 100 15 200 18 400 14 200 19 500 21 700 29 300 19 000

7 000 5 900 5 400 5 400 4 800 5 100 4 600 4 400 4 100 3 600

70

110 125 125 125 125 150 150 150 150 180

20 24 24 31 31 35 35 51 51 42

1.1 1.5 1.5 1.5 1.5 2.1 2.1 2.1 2.1 3

1 1.5 1.5 1.5 1.5 2.1 2.1 2.1 2.1 3

58.5 83.5 119 119 156 158 205 223 274 228

70.5 95.0 137 151 194 168 222 262 325 236

5 950 8 500 12 100 12 200 15 900 16 100 20 900 22 700 27 900 23 200

7 200 9 700 14 000 15 400 19 800 17 200 22 600 26 700 33 000 24 000

75

115 130 130 130 130 160 160 160

20 25 25 31 31 37 37 55

1.1 1.5 1.5 1.5 1.5 2.1 2.1 2.1

1 1.5 1.5 1.5 1.5 2.1 2.1 2.1

60.0 96.5 130 130 162 190 240 258

74.5 111 156 162 207 205 263 300

6 100 9 850 13 300 13 200 16 500 19 400 24 500 26 300

7 600 11 300 16 000 16 500 21 100 20 900 26 800 31 000

1)This value achieved with machined cages; when pressed cages are used, 80% of this value is acceptable. 2)Production switched to E type only for bearing number for which there is no standard form. 3)Minimal allowable dimension for chamfer dimension r or r1.

B-84

Bearing numbers2) type NU


● Cylindrical Roller Bearings

ra

r1a

r1a

ra

φda

φDa φdc

φdd

φde

φdc

φdb φDb

φDb

Dynamic equivalent radial load Pr=Fr Static equivalent radial load Por=Fr

Dimensions

Abutment and fillet dimensions

mm type NF

Fw

Ew

Mass

mm J

kg Db

dc

dd

de

Da

min

min

max

min

min

max

102 119 119 119 119 139

― 119 ― 119 ― 139

― 116 ― 116 ― 128

1.5 2 2 2 2 2

1.5 2 2 2 2 2

1.21 1.8 2.05 2.71 2.96 3

― 1.76 ― 2.66 ― 2.93

min4)

r1as

max

max

type N

db

max

ras

type NU

da

(approx.)

― NF ― ― ― NF

72 77 77 77 77 83

― 113 ― 113 ― 127

77.6 84.2 84.6 84.2 84.6 91.8

68 71 71 71 71 71

― 71 ― 71 ― 71

71 75 75 75 75 82

75 79 79 79 79 85

80 86 86 86 86 94

― NF ― ― ― NF ― ― ― NF

74.5 79.6 78.5 79.6 78.5 83.5 82.5 83.5 82.5 89.3

90.5 105.6 ― 105.6 ― 121.5 ― 121.5 ― 135.3

77.7 84.8 84.5 84.8 84.5 91 91 91 91 98.5

70 73 73 73 73 76 76 76 76 76

71.5 73 ― 73 ― 76 ― 76 ― 76

73 77 77 77 77 81 81 81 81 88

76 81 81 81 81 85 85 85 85 91

78.5 87 87 87 87 93 93 93 93 100

93.5 112 112 112 112 129 129 129 129 149

95 112 ― 112 ― 129 ― 129 ― 149

91.5 108 ― 108 ― 125 ― 125 ― 137

1 1.5 1.5 1.5 1.5 2 2 2 2 2

1 1.5 1.5 1.5 1.5 2 2 2 2 2

0.485 1.02 1.21 1.4 1.6 2.23 2.54 3.27 3.48 3.6

0.477 1 ― 1.37 ― 2.18 ― 3.2 ― 3.5

― NF ― ― ― NF ― ― ― NF

80 84.5 83.5 84.5 83.5 90 89 90 89 100

100 110.5 ― 110.5 ― 130 ― 130 ― 152

84 89.6 89.5 89.6 89.5 98 98 98 98 110.5

75 78 78 78 78 81 81 81 81 83

76.5 78 ― 78 ― 81 ― 81 ― 83

78 82 82 82 82 87 87 87 87 99

82 86 86 86 86 92 92 92 92 102

85 92 92 92 92 100 100 100 100 112

103.5 117 117 117 117 139 139 139 139 167

105 117 ― 117 ― 139 ― 139 ― 167

101 114 ― 114 ― 134 ― 134 ― 153

1 1.5 1.5 1.5 1.5 2 2 2 2 2.5

1 1.5 1.5 1.5 1.5 2 2 2 2 2.5

0.699 1.12 1.3 1.47 1.7 2.71 3.1 3.98 4.25 5.24

0.689 1.1 ― 1.44 ― 2.65 ― 3.9 ― 5.1

― NF ― ― ― NF ― ―

85 88.5 88.5 88.5 88.5 95.5 95 95.5

105 116.5 ― 116.5 ― 139.5 ― 139.5

89 94 94.5 94 94.5 104.2 104.6 104.2

80 83 83 83 83 86 86 86

81.5 83 ― 83 ― 86 ― 86

83 87 87 87 87 93 93 93

87 90 90 90 90 97 97 97

90 96 96 96 96 106 106 106

108.5 122 122 122 122 149 149 149

110 122 ― 122 ― 149 ― 149

106 120 ― 120 ― 143 ― 143

1 1.5 1.5 1.5 1.5 2 2 2

1 1.5 1.5 1.5 1.5 2 2 2

0.738 1.23 1.41 1.55 1.79 3.28 3.74 4.87

0.727 1.21 ― 1.52 ― 3.21 ― 4.77

4)Does not apply to side of the outer ring rib of type NF bearings.

B-85


● Cylindrical Roller Bearings

B

B r

r1 r

r1

φD

φd φFW

r1

φJ

Type NU

r1

r

φJ

Type NJ

r

r1

r

φD φEW

Type NUP

φd φJ

Type N

Type NF

d 75 ∼ 95mm Boundary dimensions mm B

rs min3)

Limiting speeds1)

Basic load ratings dynamic static dynamic static kN kgf r1s min3) Cr Cor Cr Cor

grease

oil

min-1

Bearing numbers2) type NJ

type NUP

type N

NU2315E NU415

NJ NJ

NUP NUP

― N

6 700 5 700 5 100 5 100 4 600 4 800 4 400 4 200 3 900 3 500

NU1016 NU216 NU216E NU2216 NU2216E NU316 NU316E NU2316 NU2316E NU416

NJ NJ NJ NJ NJ NJ NJ NJ NJ NJ

NUP NUP NUP NUP NUP NUP NUP NUP NUP NUP

N N ― N ― N ― N ― N

5 400 4 500 4 100 4 100 3 700 3 900 3 500 3 400 3 100

6 300 5 300 4 800 4 800 4 300 4 600 4 100 4 000 3 700

NU1017 NU217 NU217E NU2217 NU2217E NU317 NU317E NU2317 NU2317E

NJ NJ NJ NJ NJ NJ NJ NJ NJ

NUP NUP NUP NUP NUP NUP NUP NUP NUP

N N ― N ― N ― N ―

11 700 18 100 22 200 25 300 32 000 27 100 36 000 40 000 54 500

5 100 4 300 3 900 3 900 3 500 3 700 3 300 3 200 2 900

5 900 5 000 4 600 4 600 4 100 4 300 3 900 3 800 3 400

NU1018 NU218 NU218E NU2218 NU2218E NU318 NU318E NU2318 NU2318E

NJ NJ NJ NJ NJ NJ NJ NJ NJ

NUP NUP NUP NUP NUP NUP NUP NUP NUP

N N ― N ― N ― N ―

12 300 19 900 27 000

4 800 4 000 3 600

5 600 4 700 4 300

NU1019 NU219 NU219E

NJ NJ NJ

NUP NUP NUP

N N ―

d

D

75

160 190

55 45

2.1 3

2.1 3

330 262

395 274

33 500 26 800

40 000 27 900

3 500 3 200

4 100 3 700

80

125 140 140 140 140 170 170 170 170 200

22 26 26 33 33 39 39 58 58 48

1.1 2 2 2 2 2.1 2.1 2.1 2.1 3

1 2 2 2 2 2.1 2.1 2.1 2.1 3

72.5 106 139 147 186 190 256 274 355 299

90.5 122 167 186 243 207 282 330 430 315

7 400 10 800 14 200 15 000 19 000 19 400 26 100 27 900 36 500 30 500

9 250 12 500 17 000 19 000 24 800 21 100 28 800 34 000 44 000 32 000

5 700 4 800 4 400 4 400 3 900 4 100 3 700 3 600 3 300 3 000

85

130 150 150 150 150 180 180 180 180

22 28 28 36 36 41 41 60 60

1.1 2 2 2 2 3 3 3 3

1 2 2 2 2 3 3 3 3

74.5 120 167 170 217 212 291 315 395

95.5 140 199 218 279 228 330 380 485

7 600 12 300 17 000 17 300 22 200 21 600 29 700 32 000 40 000

9 750 14 300 20 300 22 200 28 400 23 300 33 500 39 000 49 500

90

140 160 160 160 160 190 190 190 190

24 30 30 40 40 43 43 64 64

1.5 2 2 2 2 3 3 3 3

1.1 2 2 2 2 3 3 3 3

88.0 152 182 197 242 240 315 325 435

114 178 217 248 315 265 355 395 535

9 000 15 500 18 500 20 100 24 700 24 500 32 000 33 500 44 500

95

145 170 170

24 32 32

1.5 2.1 2.1

1.1 2.1 2.1

90.5 166 220

120 195 265

9 250 16 900 22 500

1)This value achieved with machined cages; when pressed cages are used, 80% of this value is acceptable. 2)Production switched to E type only for bearing number for which there is no standard form. 3)Minimal allowable dimension for chamfer dimension r or r1.

B-86

type NU


● Cylindrical Roller Bearings

ra

r1a

r1a

ra

φda

φDa φdc

φdd

φde

φdc

φdb φDb

φDb

Dynamic equivalent radial load Pr=Fr Static equivalent radial load Por=Fr

Dimensions

Abutment and fillet dimensions

mm type NF

Fw

Ew

Mass

mm J

kg

da

db

dc

dd

de

Da

min

min

max

min

min

max

Db max

min4)

ras

r1as

max

max

type NU

type N

(approx.)

― NF

95 104.5

― 160.5

104.6 116

86 88

― 88

93 103

97 107

106 118

149 177

― 177

― 162

2 2.5

2 2.5

5.25 6.22

― 6.06

― NF ― ― ― NF ― ― ― NF

91.5 95.3 95.3 95.3 95.3 103 101 103 101 110

113.5 125.3 ― 125.3 ― 147 ― 147 ― 170

95.9 101.2 101.7 101.2 101.7 111.8 111 111.8 111 122

85 89 89 89 89 91 91 91 91 93

86.5 89 ― 89 ― 91 ― 91 ― 93

90 94 94 94 94 99 99 99 99 109

94 97 97 97 97 105 105 105 105 112

97 104 104 104 104 114 114 114 114 124

118.5 131 131 131 131 159 159 159 159 187

120 131 ― 131 ― 159 ― 159 ― 187

114.5 128 ― 128 ― 151 ― 151 ― 172

1 2 2 2 2 2 2 2 2 2.5

1 2 2 2 2 2 2 2 2 2.5

0.98 1.5 1.67 1.93 2.12 3.86 4.22 5.79 6.25 7.32

0.965 1.47 ― 1.89 ― 3.77 ― 5.67 ― 7.14

― NF ― ― ― NF ― ― ―

96.5 101.8 100.5 101.8 100.5 108 108 108 108

118.5 133.8 ― 133.8 ― 156 ― 156 ―

100.9 108.2 107.7 108.2 107.7 117.5 118.4 117.5 118.4

90 94 94 94 94 98 98 98 98

91.5 94 ― 94 ― 98 ― 98 ―

95 99 99 99 99 106 106 106 106

99 104 104 104 104 110 110 110 110

102 110 110 110 110 119 119 119 119

123.5 141 141 141 141 167 167 167 167

125 141 ― 141 ― 167 ― 167 ―

119.5 137 ― 137 ― 160 ― 160 ―

1 2 2 2 2 2.5 2.5 2.5 2.5

1 2 2 2 2 2.5 2.5 2.5 2.5

1.03 1.87 2.11 2.44 2.68 4.54 4.81 6.7 7.16

1.01 1.83 ― 2.39 ― 4.44 ― 6.57 ―

― NF ― ― ― NF ― ― ―

103 107 107 107 107 115 113.5 115 113.5

127 143 ― 143 ― 165 ― 165 ―

107.8 114.2 114.6 114.2 114.6 125 124.7 125 124.7

96.5 99 99 99 99 103 103 103 103

98 99 ― 99 ― 103 ― 103 ―

101 105 105 105 105 111 111 111 111

106 109 109 109 109 117 117 117 117

109 116 116 116 116 127 127 127 127

132 151 151 151 151 177 177 177 177

133.5 151 ― 151 ― 177 ― 177 ―

129 146 ― 146 ― 169 ― 169 ―

1.5 2 2 2 2 2.5 2.5 2.5 2.5

1 2 2 2 2 2.5 2.5 2.5 2.5

1.33 2.3 2.44 3.1 3.33 5.3 5.72 7.95 8.56

1.31 2.25 ― 3.04 ― 5.18 ― 7.79 ―

― NF ―

108 113.5 112.5

132 151.5 ―

112.8 121 121

101.5 106 106

103 106 ―

106 111 111

111 116 116

114 123 123

137 159 159

138.5 134 159 155 ― ―

1.5 2 2

1 2 2

1.4 2.78 3.02

1.38 2.72 ―

4)Does not apply to side of the outer ring rib of type NF bearings.

B-87


● Cylindrical Roller Bearings

B

B r

r1 r

r1

φD

φd φFW

r1

φJ

Type NU

r1

r

φJ

Type NJ

r

r1

r

φD φEW

Type NUP

φd φJ

Type N

Type NF

d 95 ∼ 120mm Boundary dimensions mm B

rs min3)

Limiting speeds1)

Basic load ratings dynamic static dynamic static kN kgf r1s min3) Cr Cor Cr Cor

grease

oil

min-1

Bearing numbers2) type NJ

type NUP

type N

NU2219 NU2219E NU319 NU319E NU2319 NU2319E

NJ NJ NJ NJ NJ NJ

NUP NUP NUP NUP NUP NUP

N ― N ― N ―

5 400 4 500 4 100 4 100 3 600 3 800 3 500 3 400 3 100

NU1020 NU220 NU220E NU2220 NU2220E NU320 NU320E NU2320 NU2320E

NJ NJ NJ NJ NJ NJ NJ NJ NJ

NUP NUP NUP NUP NUP NUP NUP NUP NUP

N N ― N ― N ― N ―

4 300 3 600 3 100

5 100 4 300 3 700

NU1021 NU221 NU321

NJ NJ NJ

NUP NUP NUP

N N N

17 700 29 500 37 000 42 000 52 500 41 000 53 500 80 500 89 500

4 100 3 400 3 100 3 100 2 800 3 000 2 700 2 600 2 400

4 800 4 000 3 700 3 700 3 300 3 500 3 100 3 100 2 800

NU1022 NU222 NU222E NU2222 NU2222E NU322 NU322E NU2322 NU2322E

NJ NJ NJ NJ NJ NJ NJ NJ NJ

NUP NUP NUP NUP NUP NUP NUP NUP NUP

N N ― N ― N ― N ―

19 500 32 500 43 000 47 000 63 000 52 000

3 800 3 200 2 900 2 900 2 600 2 700

4 400 3 700 3 400 3 400 3 000 3 200

NU1024 NU224 NU224E NU2224 NU2224E NU324

NJ NJ NJ NJ NJ NJ

NUP NUP NUP NUP NUP NUP

N N ― N ― N

d

D

95

170 170 200 200 200 200

43 43 45 45 67 67

2.1 2.1 3 3 3 3

2.1 2.1 3 3 3 3

230 286 259 335 370 460

298 370 285 385 460 585

23 500 29 200 26 400 34 000 38 000 47 000

30 500 38 000 29 500 39 500 47 000 59 500

3 600 3 300 3 400 3 100 3 000 2 700

4 300 3 800 4 000 3 600 3 500 3 200

100

150 180 180 180 180 215 215 215 215

24 34 34 46 46 47 47 73 73

1.5 2.1 2.1 2.1 2.1 3 3 3 3

1.1 2.1 2.1 2.1 2.1 3 3 3 3

93.0 183 249 258 335 299 380 410 570

126 217 305 340 445 335 425 505 715

9 500 18 600 25 400 26 300 34 000 30 500 38 500 42 000 58 000

12 800 22 200 31 000 34 500 45 500 34 500 43 500 51 500 73 000

4 600 3 800 3 500 3 500 3 100 3 300 2 900 2 900 2 600

105

160 190 225

26 36 49

2 2.1 3

1.1 2.1 3

105 201 320

142 241 360

10 700 20 500 32 500

14 500 24 600 36 500

110

170 200 200 200 200 240 240 240 240

28 38 38 53 53 50 50 80 80

2 2.1 2.1 2.1 2.1 3 3 3 3

1.1 2.1 2.1 2.1 2.1 3 3 3 3

131 240 293 320 385 360 450 605 675

174 290 365 415 515 400 525 790 880

13 400 24 500 29 800 32 500 39 000 36 500 46 000 61 500 69 000

120

180 215 215 215 215 260

28 40 40 58 58 55

2 2.1 2.1 2.1 2.1 3

1.1 2.1 2.1 2.1 2.1 3

139 260 335 350 450 450

191 320 420 460 620 510

14 100 26 500 34 000 35 500 46 000 46 000

1)This value achieved with machined cages; when pressed cages are used, 80% of this value is acceptable. 2)Production switched to E type only for bearing number for which there is no standard form. 3)Minimal allowable dimension for chamfer dimension r or r1.

B-88

type NU


● Cylindrical Roller Bearings

ra

r1a

r1a

ra

φda

φDa φdc

φdd

φde

φdc

φdb φDb

φDb

Dynamic equivalent radial load Pr=Fr Static equivalent radial load Por=Fr

Dimensions

Abutment and fillet dimensions

mm type NF

Fw

Ew

Mass

mm J

kg

da

db

dc

dd

de

Da

min

min

max

min

min

max

Db max

min4)

ras

r1as

max

max

type NU

type N

(approx.)

― ― NF ― ― ―

113.5 112.5 121.5 121.5 121.5 121.5

151.5 ― 173.5 ― 173.5 ―

121 121 132 132.7 132 132.7

106 106 108 108 108 108

106 ― 108 ― 108 ―

111 111 119 119 119 119

116 116 124 124 124 124

123 123 134 134 134 134

159 159 187 187 187 187

159 ― 187 ― 187 ―

155 ― 178 ― 178 ―

2 2 2.5 2.5 2.5 2.5

2 2 2.5 2.5 2.5 2.5

3.79 4.14 6.13 6.62 9.2 9.8

3.71 ― 5.99 ― 9.02 ―

― NF ― ― ― NF ― ― ―

113 120 119 120 119 129.5 127.5 129.5 127.5

137 160 ― 160 ― 185.5 ― 185.5 ―

117.8 128 128 128 128 140.5 140.3 140.5 140.3

106.5 111 111 111 111 113 113 113 113

108 111 ― 111 ― 113 ― 113 ―

111 117 117 117 117 125 125 125 125

116 122 122 122 122 132 132 132 132

119 130 130 130 130 143 143 143 143

142 169 169 169 169 202 202 202 202

143.5 169 ― 169 ― 202 ― 202 ―

139 164 ― 164 ― 190 ― 190 ―

1.5 2 2 2 2 2.5 2.5 2.5 2.5

1 2 2 2 2 2.5 2.5 2.5 2.5

1.45 3.33 3.66 4.57 5.01 7.49 8.57 11.7 12.8

1.43 3.26 ― 4.48 ― 7.32 ― 11.5 ―

― NF NF

119.5 126.8 135

145.5 168.8 195

124.7 135 147

111.5 116 118

114 116 118

118 124 132

122 129 137

126 137 149

151 179 212

153.5 147.5 179 173 212 199

2 2 2.5

1 2 2.5

1.84 3.95 8.53

1.81 3.87 8.33

― NF ― ― ― NF ― ― ―

125 132.5 132.5 132.5 132.5 143 143 143 143

155 178.5 ― 178.5 ― 207 ― 207 ―

131 141.5 142.1 141.5 142.1 155.5 156.6 155.5 156.6

116.5 121 121 121 121 123 123 123 123

119 121 ― 121 ― 123 ― 123 ―

124 130 130 130 130 140 140 140 140

128 135 135 135 135 145 145 145 145

132 144 144 144 144 158 158 158 158

161 189 189 189 189 227 227 227 227

163.5 189 ― 189 ― 227 ― 227 ―

157 182 ― 182 ― 211 ― 211 ―

2 2 2 2 2 2.5 2.5 2.5 2.5

1 2 2 2 2 2.5 2.5 2.5 2.5

2.33 4.63 4.27 6.56 7.4 10 11.1 17.1 19.4

2.3 4.54 ― 6.43 ― 9.77 ― 16.8 ―

― NF ― ― ― NF

135 143.5 143.5 143.5 143.5 154

165 191.5 ― 191.5 ― 226

141 153 153.9 153 153.9 168.5

126.5 131 131 131 131 133

129 131 ― 131 ― 133

134 141 141 141 141 151

138 146 146 146 146 156

142 156 156 156 156 171

171 204 204 204 204 247

173.5 204 ― 204 ― 247

167 196 ― 196 ― 230

2 2 2 2 2 2.5

1 2 2 2 2 2.5

2.44 5.57 5.97 8.19 9.18 12.8

2.4 5.46 ― 8.03 ― 12.5

4)Does not apply to side of the outer ring rib of type NF bearings.

B-89


● Cylindrical Roller Bearings

B

B r r1

r φd φFW

φD

r

r1

Type NU

r1

φJ

r1

r

Type NJ

r φD φEW

φJ

r1

Type NUP

φd φJ

Type N

Type NF

d 120 ∼ 160mm Boundary dimensions mm B

rs min3)

Limiting speeds1)

Basic load ratings dynamic static dynamic static kN kgf r1s min3) Cr Cor Cr Cor

grease

oil

min-1

type NJ

type NUP

type N

NU324E NU2324 NU2324E

NJ NJ NJ

NUP NUP NUP

― N ―

4 000 3 400 3 100 3 100 2 700 2 900 2 600 2 600 2 300

NU1026 NU226 NU226E NU2226 NU2226E NU326 NU326E NU2326 NU2326E

NJ NJ NJ NJ NJ NJ NJ NJ NJ

NUP NUP NUP NUP NUP NUP NUP NUP NUP

N N ― N ― N ― N ―

3 200 2 700 2 400 2 400 2 100 2 300 2 100 2 000 1 800

3 800 3 100 2 800 2 800 2 500 2 700 2 400 2 300 2 100

NU1028 NU228 NU228E NU2228 NU2228E NU328 NU328E NU2328 NU2328E

NJ NJ NJ NJ NJ NJ NJ NJ NJ

NUP NUP NUP NUP NUP NUP NUP NUP NUP

N N ― N ― N ― N ―

3 000 2 500 2 200 2 200 2 000 2 100 1 900 1 900 1 700

3 500 2 900 2 600 2 600 2 400 2 500 2 300 2 200 2 000

NU1030 NU230 NU230E NU2230 NU2230E NU330 NU330E NU2330 NU2330E

NJ NJ NJ NJ NJ NJ NJ NJ NJ

NUP NUP NUP NUP NUP NUP NUP NUP NUP

N N ― N ― N ― N ―

2 800 2 300 2 100

3 300 2 700 2 400

NU1032 NU232 NU232E

NJ NJ NJ

NUP NUP NUP

N N ―

d

D

120

260 260 260

55 86 86

3 3 3

3 3 3

530 710 795

610 920 1 030

54 000 62 000 72 500 93 500 81 000 105 000

2 400 2 400 2 200

2 800 2 800 2 500

130

200 230 230 230 230 280 280 280 280

33 40 40 64 64 58 58 93 93

2 3 3 3 3 4 4 4 4

1.1 3 3 3 3 4 4 4 4

172 270 365 380 530 560 615 840 920

238 340 455 530 735 665 735 1 130 1 230

17 500 24 200 27 600 35 000 37 000 46 000 38 500 54 000 54 000 75 000 57 000 68 000 63 000 75 000 85 500 115 000 94 000 126 000

3 400 2 900 2 600 2 600 2 300 2 500 2 200 2 200 2 000

140

210 250 250 250 250 300 300 300 300

33 42 42 68 68 62 62 102 102

2 3 3 3 3 4 4 4 4

1.1 3 3 3 3 4 4 4 4

176 310 395 445 575 615 665 920 1 020

250 400 515 635 835 745 795 1 250 1 380

17 900 25 500 31 500 40 500 40 000 52 500 45 500 64 500 58 500 85 000 63 000 76 000 67 500 81 500 94 000 127 000 104 000 141 000

150

225 270 270 270 270 320 320 320 320

35 45 45 73 73 65 65 108 108

2.1 3 3 3 3 4 4 4 4

1.5 3 3 3 3 4 4 4 4

202 345 450 500 660 665 760 1 020 1 160

294 435 595 710 980 805 920 1 400 1 600

20 600 29 900 35 000 44 500 45 500 60 500 51 000 72 500 67 500 100 000 67 500 82 500 77 500 94 000 104 000 143 000 118 000 163 000

160

240 290 290

38 48 48

2.1 3 3

1.5 3 3

238 430 500

340 570 665

24 200 43 500 51 000

35 000 58 000 68 000

1)This value achieved with machined cages; when pressed cages are used, 80% of this value is acceptable. 2)Production switched to E type only for bearing number for which there is no standard form. 3)Minimal allowable dimension for chamfer dimension r or r1.

B-90

Bearing numbers2) type NU


● Cylindrical Roller Bearings

ra

r1a

r 1a

ra φda

φDa φdc

φdd

φde

φdc

φdb φDb

φDb

Dynamic equivalent radial load Pr=Fr Static equivalent radial load Por=Fr

Dimensions

Abutment and fillet dimensions

mm type NF

Fw

Ew

― ― ―

154 154 154

― 226 ―

― NF ― ― ― NF ― ― ―

148 156 153.5 156 153.5 167 167 167 167

― NF ― ― ― NF ― ― ―

Mass

mm

kg

dc

dd

de

Da

min

min

max

min

min

max

169.2 168.5 169.2

133 133 133

― 133 ―

151 151 151

156 156 156

171 171 171

247 247 247

― 247 ―

― 230 ―

2.5 2.5 2.5

2.5 2.5 2.5

13.9 21.5 26.1

― 21.1 ―

182 204 ― 204 ― 243 ― 243 ―

154.8 165.5 164.7 165.5 164.7 182 183 182 183

136.5 143 143 143 143 146 146 146 146

139 143 ― 143 ― 146 ― 146 ―

146 151 151 151 151 164 164 164 164

151 158 158 158 158 169 169 169 169

156 168 168 168 168 184 184 184 184

191 217 217 217 217 264 264 264 264

193.5 217 ― 217 ― 264 ― 264 ―

184 208 ― 208 ― 247 ― 247 ―

2 2.5 2.5 2.5 2.5 3 3 3 3

1 2.5 2.5 2.5 2.5 3 3 3 3

3.69 6.3 6.9 10.2 11.8 17.4 19.4 26.9 30.9

3.63 6.17 ― 10 ― 17 ― 26.4 ―

158 169 169 169 169 180 180 180 180

192 221 ― 221 ― 260 ― 260 ―

164.8 179.5 180.2 179.5 180.2 196 196.8 196 196.8

146.5 153 153 153 153 156 156 156 156

149 153 ― 153 ― 156 ― 156 ―

156 166 166 166 166 176 176 176 176

161 171 171 171 171 182 182 182 182

166 182 182 182 182 198 198 198 198

201 237 237 237 237 284 284 284 284

203.5 237 ― 237 ― 284 ― 284 ―

194 225 ― 225 ― 265 ― 265 ―

2 2.5 2.5 2.5 2.5 3 3 3 3

1 2.5 2.5 2.5 2.5 3 3 3 3

4.05 7.88 8.73 12.9 15.8 21.2 23.2 33.8 38.7

3.98 7.72 ― 12.6 ― 20.7 ― 33.1 ―

― NF ― ― ― NF ― ― ―

169.5 182 182 182 182 193 193 193 193

205.5 238 ― 238 ― 277 ― 277 ―

176.7 193 194 193 194 210 211 210 211

158 163 163 163 163 166 166 166 166

161 163 ― 163 ― 166 ― 166 ―

167 179 179 179 179 190 190 190 190

173 184 184 184 184 195 195 195 195

178 196 196 196 196 213 213 213 213

214 257 257 257 257 304 304 304 304

217 257 ― 257 ― 304 ― 304 ―

207.5 242 ― 242 ― 282 ― 282 ―

2 2.5 2.5 2.5 2.5 3 3 3 3

1.5 2.5 2.5 2.5 2.5 3 3 3 3

4.77 9.92 11 16.3 19.7 25.3 28.4 40.6 47.2

4.7 9.72 ― 16 ― 24.7 ― 39.8 ―

― NF ―

180 195 195

220 255 ―

188 207 207.8

168 173 173

171 173 ―

178 192 192

184 197 197

189 210 210

229 277 277

232 277 ―

222 259 ―

2 2.5 2.5

1.5 2.5 2.5

5.9 13.7 15.6

5.81 13.4 ―

4)Does not apply to side of the outer ring rib of type NF bearings.

B-91

max

ras

type N

db

J

Db

r1as type NU

da

min4)

max

max

(approx.)


● Cylindrical Roller Bearings

B

B r r1

r φd φFW

φD

r

r1

Type NU

r1

φJ

r1

r

Type NJ

r φD φEW

φJ

r1

Type NUP

φd φJ

Type N

Type NF

d 160 ∼ 200mm Boundary dimensions

Limiting speeds1)

Basic load ratings dynamic static dynamic static kN kgf r1s min3) Cr Cor Cr Cor

grease

oil

min-1

d

D

mm B

160

290 290 340 340 340 340

80 80 68 68 114 114

3 3 4 4 4 4

3 3 4 4 4 4

630 810 700 860 1 070 1 310

940 1 190 875 1 050 1 520 1 820

64 500 82 500 71 000 87 500 109 000 134 000

96 000 121 000 89 500 107 000 155 000 186 000

2 100 1 900 2 000 1 800 1 700 1 600

2 400 2 200 2 300 2 100 2 000 1 900

170

260 310 310 310 310 360 360

42 52 52 86 86 72 120

2.1 4 4 4 4 4 4

2.1 4 4 4 4 4 4

278 475 605 715 965 795 1 220

400 635 800 1 080 1 410 1 010 1 750

28 300 48 500 61 500 73 000 98 500 81 500 125 000

41 000 65 000 81 500 110 000 144 000 103 000 179 000

2 600 2 200 2 000 2 000 1 800 1 800 1 600

180

280 320 320 320 320 380 380

46 52 52 86 86 75 126

2.1 4 4 4 4 4 4

2.1 4 4 4 4 4 4

340 495 625 745 1 010 905 1 380

485 675 850 1 140 1 510 1 150 1 990

35 000 50 500 64 000 76 000 103 000 92 000 141 000

49 500 69 000 87 000 117 000 154 000 118 000 203 000

190

290 340 340 340 340 400 400

46 55 55 92 92 78 132

2.1 4 4 4 4 5 5

2.1 4 4 4 4 5 5

350 555 695 830 1 100 975 1 520

510 770 955 1 290 1 670 1 260 2 220

36 000 56 500 71 000 84 500 113 000 99 500 155 000

200

310 360 360 360 360 420

51 58 58 98 98 80

2.1 4 4 4 4 5

2.1 4 4 4 4 5

390 620 765 925 1 220 975

580 865 1 060 1 440 1 870 1 270

40 000 63 500 78 000 94 000 125 000 99 500

rs min3)

Bearing numbers2) type NJ

type NUP

type N

NU2232 NU2232E NU332 NU332E NU2332 NU2332E

NJ NJ NJ NJ NJ NJ

NUP NUP NUP NUP NUP NUP

N ― N ― N ―

3 000 2 500 2 300 2 300 2 100 2 200 1 900

NU1034 NU234 NU234E NU2234 NU2234E NU334 NU2334

NJ NJ NJ NJ NJ NJ NJ

NUP NUP NUP NUP NUP NUP NUP

N N ― N ― N N

2 400 2 000 1 800 1 800 1 600 1 700 1 500

2 900 2 400 2 200 2 200 1 900 2 000 1 800

NU1036 NU236 NU236E NU2236 NU2236E NU336 NU2336

NJ NJ NJ NJ NJ NJ NJ

NUP NUP NUP NUP NUP NUP NUP

N N ― N ― N N

52 000 78 500 97 500 131 000 170 000 129 000 226 000

2 300 1 900 1 700 1 700 1 500 1 600 1 400

2 700 2 200 2 000 2 000 1 800 1 900 1 700

NU1038 NU238 NU238E NU2238 NU2238E NU338 NU2338

NJ NJ NJ NJ NJ NJ NJ

NUP NUP NUP NUP NUP NUP NUP

N N ― N ― N N

59 500 88 500 108 000 147 000 191 000 130 000

2 200 1 800 1 600 1 600 1 500 1 500

2 600 2 100 1 900 1 900 1 700 1 800

NU1040 NU240 NU240E NU2240 NU2240E NU340

NJ NJ NJ NJ NJ NJ

NUP NUP NUP NUP NUP NUP

N N ― N ― N

1)This value achieved with machined cages; when pressed cages are used, 80% of this value is acceptable. 2)Production switched to E type only for bearing number for which there is no standard form. 3)Minimal allowable dimension for chamfer dimension r or r1.

B-92

type NU


● Cylindrical Roller Bearings

ra

r1a

r 1a

ra φda

φDa φdc

φdd

φde

φdc

φdb φDb

φDb

Dynamic equivalent radial load Pr=Fr Static equivalent radial load Por=Fr

Dimensions

Abutment and fillet dimensions

mm type NF

Fw

Ew

― ― NF ― ― ―

195 193 208 204 208 204

255 ― 292 ― 292 ―

― NF ― ― ― NF ―

193 208 207 208 205 220 220

― NF ― ― ― NF ―

Mass

mm

kg

dc

dd

de

Da

min

min

max

min

min

max

207 206.6 225 223.2 225 223.2

173 173 176 176 176 176

173 ― 176 ― 176 ―

192 192 200 200 200 200

197 197 211 211 211 211

210 210 228 228 228 228

277 277 324 324 324 324

277 ― 324 ― 324 ―

259 ― 297 ― 297 ―

2.5 2.5 3 3 3 3

2.5 2.5 3 3 3 3

22 25.1 31.3 34 50.5 56

21.6 ― 30.6 ― 49.5 ―

237 272 ― 272 ― 310 310

201.8 220.5 221.4 220.5 220.2 238 238

181 186 186 186 186 186 186

181 186 ― 186 ― 186 186

190 204 204 204 204 216 216

197 211 211 211 211 223 223

203 223 223 223 223 241 241

249 294 294 294 294 344 344

249 294 ― 294 ― 344 344

239 277 ― 277 ― 315 315

2 3 3 3 3 3 3

2 3 3 3 3 3 3

7.88 17 19.6 27.2 31 37 59.5

7.76 16.7 ― 26.7 ― 36.1 58.3

205 218 217 218 215 232 232

255 282 ― 282 ― 328 328

215 230.5 231.4 230.5 230.2 252 252

191 196 196 196 196 196 196

191 196 ― 196 ― 196 196

203 214 214 214 214 227 227

209 221 221 221 221 235 235

216 233 233 233 233 255 255

269 304 304 304 304 364 364

269 304 ― 304 ― 364 364

257 287 ― 287 ― 333 333

2 3 3 3 3 3 3

2 3 3 3 3 3 3

10.3 17.7 20.4 28.4 31.9 44.2 69.5

10.1 17.3 ― 27.8 ― 43.2 68.1

― NF ― ― ― NF ―

215 231 230 231 228 245 245

265 299 ― 299 ― 345 345

225 244.5 245.2 244.5 244 265 265

201 206 206 206 206 210 210

201 206 ― 206 ― 210 210

213 227 227 227 227 240 240

219 234 234 234 234 248 248

226 247 247 247 247 268 268

279 324 324 324 324 380 380

279 324 ― 324 ― 380 380

267 304 ― 304 ― 351 351

2 3 3 3 3 4 4

2 3 3 3 3 4 4

10.7 21.3 24.2 34.4 39.5 49.4 80.5

10.5 20.8 ― 33.7 ― 48.3 78.9

― NF ― ― ― NF

229 244 243 244 241 260

281 316 ― 316 ― 360

239.4 258 259 258 257.8 280

211 216 216 216 216 220

211 216 ― 216 ― 220

226 240 240 240 240 254

233 247 247 247 247 263

241 261 261 261 261 283

299 344 344 344 344 400

299 344 ― 344 ― 400

283 321 ― 321 ― 366

2 3 3 3 3 4

2 3 3 3 3 4

13.9 25.3 28.1 41.3 47.8 55.8

13.7 24.8 ― 40.5

4)Does not apply to side of the outer ring rib of type NF bearings.

B-93

max

ras

type N

db

J

Db

r1as type NU

da

min4)

max

max

(approx.)

54.5


● Cylindrical Roller Bearings

B

B r r1

r φd φFW

φD

r

r1

Type NU

r1

φJ

r1

r

Type NJ

r φD φEW

φJ

r1

Type NUP

φd φJ

Type N

Type NF

d 200 ∼ 360mm Boundary dimensions

Limiting speeds1)

Bearing numbers2)

Basic load ratings dynamic static dynamic static kN kgf r1s min3) Cr Cor Cr Cor

grease

oil

type NU

type NJ

type NUP

type N

min-1

d

D

mm B

200

420

138

5

5

1 510

2 240

154 000 229 000

1 400

1 600

NU2340

NJ

NUP

N

220

340 400 400 460 460

56 65 108 88 145

3 4 4 5 5

3 4 4 5 5

500 760 1 140 1 190 1 780

750 1 080 1 810 1 570 2 620

51 000 77 500 116 000 122 000 181 000

76 500 110 000 184 000 161 000 268 000

2 000 1 600 1 500 1 400 1 200

2 300 1 900 1 700 1 600 1 400

NU1044 NU244 NU2244 NU344 NU2344

NJ NJ NJ NJ NJ

NUP NUP NUP NUP NUP

N N N N N

240

360 440 440 500 500

56 72 120 95 155

3 4 4 5 5

3 4 4 5 5

530 935 1 440 1 430 2 100

820 1 340 2 320 1 950 3 200

54 000 95 500 146 000 146 000 214 000

83 500 136 000 236 000 198 000 325 000

1 800 1 500 1 300 1 300 1 100

2 100 1 700 1 600 1 500 1 300

NU1048 NU248 NU2248 NU348 NU2348

NJ NJ NJ NJ NJ

NUP NUP NUP NUP NUP

N N N N N

260

400 480 480 540 540

65 80 130 102 165

4 5 5 6 6

4 5 5 6 6

645 1 150 1 780 1 620 2 340

1 000 1 660 2 930 2 230 3 600

65 500 117 000 182 000 165 000 239 000

102 000 170 000 299 000 228 000 365 000

1 600 1 300 1 200 1 200 1 000

1 900 1 600 1 400 1 400 1 200

NU1052 NU252 NU2252 NU352 NU2352

NJ NJ NJ NJ NJ

NUP NUP NUP NUP NUP

N N N N N

280

420 500 500 580 580

65 80 130 108 175

4 5 5 6 6

4 5 5 6 6

660 1 190 1 840 1 820 2 700

1 050 1 760 3 100 2 540 4 250

67 000 121 000 188 000 185 000 275 000

107 000 180 000 315 000 259 000 430 000

1 500 1 200 1 100 1 100 920

1 800 1 400 1 300 1 200 1 100

NU1056 NU256 NU2256 NU356 NU2356

NJ NJ NJ NJ NJ

NUP NUP NUP NUP NUP

N N N N N

300

460 540 540

74 85 140

4 5 5

4 5 5

855 1 400 2 180

1 340 2 070 3 650

87 000 137 000 143 000 211 000 223 000 370 000

1 400 1 100 1 000

1 600 1 300 1 200

NU1060 NU260 NU2260

NJ NJ NJ

NUP NUP NUP

N N N

320

480 580 580

74 92 150

4 5 5

4 5 5

875 1 600 2 550

1 410 2 390 4 350

89 500 143 000 164 000 244 000 260 000 445 000

1 300 1 000 950

1 500 1 200 1 100

NU1064 NU264 NU2264

NJ NJ NJ

NUP NUP NUP

N N N

340

520

82

5

5

1 050

1 670

107 000 170 000

1 200

1 400

NU1068

NJ

NUP

N

360

540

82

5

5

1 080

1 750

110 000 179 000

1 100

1 300

NU1072

NJ

NUP

N

rs min3)

1)This value achieved with machined cages; when pressed cages are used, 80% of this value is acceptable. 2)Production switched to E type only for bearing number for which there is no standard form. 3)Minimal allowable dimension for chamfer dimension r or r1.

B-94


● Cylindrical Roller Bearings

ra

r1a

r 1a

ra φda

φDa φdc

φdd

φde

φdc

φdb φDb

φDb

Dynamic equivalent radial load Pr=Fr Static equivalent radial load Por=Fr

Dimensions

Abutment and fillet dimensions

mm type NF

Fw

Ew

260

― NF ― NF ―

Mass

mm

kg

da

db

dc

dd

de

Da

Db

J

min

min

max

min

min

max

360

280

220

220

254

263

283

400

400

250 270 270 284 284

310 350 350 396 396

262 286 286 307 307

233 236 236 240 240

233 236 236 240 240

248 266 266 279 279

254 273 273 287 287

264 289 289 307 307

327 384 384 440 440

― NF ― NF ―

270 295 295 310 310

330 385 385 430 430

282 313 313 335 335

253 256 256 260 260

253 256 256 260 260

268 293 293 305 305

275 298 298 313 313

284 316 316 333 333

― NF ― NF ―

296 320 320 336 336

364 420 420 464 464

309.6 340 340 362 362

276 280 280 284 284

276 280 280 284 284

292 318 318 331 331

300 323 323 339 339

― NF ― NF ―

316 340 340 362 362

384 440 440 498 498

329.6 360 360 390 390

296 300 300 304 304

296 300 300 304 304

312 336 336 356 356

― NF ―

340 364 364

420 476 476

356 387 387

316 320 320

316 320 320

― NF ―

360 390 390

440 510 510

376 415 415

336 340 340

385

475

403

405

495

423

min4)

r1as type NU

type N

max

max

366

4

4

92.6

90.7

327 384 384 440 440

313 355 355 402 402

2.5 3 3 4 4

2.5 18.2 3 37.7 3 59 4 73.4 4 116

17.9 37 57.8 71.7 114

347 424 424 480 480

347 424 424 480 480

333 390 390 436 436

2.5 3 3 4 4

2.5 19.6 3 50.2 3 80 4 93.4 4 147

19.3 49.2 78.4 91.3 144

312 343 343 359 359

384 460 460 516 516

384 460 460 516 516

367 426 426 471 471

3 4 4 5 5

3 4 4 5 5

29.1 66.9 104 117 182

28.7 65.6 102 114 178

320 343 343 366 366

332 365 365 386 386

404 480 480 556 556

404 480 480 556 556

387 446 446 505 505

3 4 4 5 5

3 4 4 5 5

30.9 70.8 109 142 222

30.4 69.4 107 139 218

336 361 361

344 368 368

358 392 392

444 520 520

444 520 520

423 482 482

3 4 4

3 4 4

43.6 88.2 138

42.9 86.4 135

336 340 340

356 386 386

364 393 393

378 419 419

464 560 560

464 560 560

443 516 516

3 4 4

3 4 4

46 111 172

45.3 109 168

360

360

381

390

405

500

500

479

4

4

61.8

60.8

380

380

401

410

425

520

520

499

4

4

64.7

63.7

4)Does not apply to side of the outer ring rib of type NF bearings.

B-95

max

ras

(approx.)


● Cylindrical Roller Bearings

B

B r r1

r φd φFW

φD

r

r1

Type NU

r1

φJ

r1

r

Type NJ

r φD φEW

φJ

r1

Type NUP

φd φJ

Type N

Type NF

d 380 ∼ 500mm Boundary dimensions mm B

rs min3)

Limiting speeds1)

Bearing numbers2)

Basic load ratings dynamic static dynamic static kN kgf r1s min3) Cr Cor Cr Cor

grease

oil

type NU

type NJ

type NUP

type N

min-1

d

D

380

560

82

5

5

1 100

1 840

112 000 187 000

1 100

1 200

NU1076

NJ

NUP

N

400

600

90

5

5

1 320

2 190

134 000 223 000

990

1 200

NU1080

NJ

NUP

N

420

620

90

5

5

1 350

2 290

138 000 233 000

950

1 100

NU1084

NJ

NUP

N

440

650

94

6

6

1 430

2 430

146 000 248 000

900

1 100

NU1088

NJ

NUP

N

460

680

100

6

6

1 540

2 630

157 000 269 000

850

1 000

NU1092

NJ

NUP

N

480

700

100

6

6

1 580

2 750

161 000 280 000

810

960

NU1096

NJ

NUP

N

500

720

100

6

6

1 610

2 870

164 000 292 000

770

910

NU10/500

NJ

NUP

N

1)This value achieved with machined cages; when pressed cages are used, 80% of this value is acceptable. 2)Production switched to E type only for bearing number for which there is no standard form. 3)Minimal allowable dimension for chamfer dimension r or r1.

B-96


● Cylindrical Roller Bearings

ra

r1a

r 1a

ra φda

φDa φdc

φdd

φde

φdc

φdb φDb

φDb

Dynamic equivalent radial load Pr=Fr Static equivalent radial load Por=Fr

Dimensions

Abutment and fillet dimensions

mm type NF

Fw

Ew

425

Mass

mm

kg

dc

dd

de

Da

J

min

min

max

min

min

max

515

443

400

400

421

430

445

540

540

519

4

4

67.5

66.5

450

550

470

420

420

446

455

473

580

580

554

4

4

87.6

86.3

470

570

490

440

440

466

475

493

600

600

574

4

4

91

89.6

493

597

513.8

464

464

488

499

517

626

626

602

5

5

105

103

516

624

537.6

484

484

511

522

541

656

656

629

5

5

122

120

536

644

557.6

504

504

531

542

561

676

676

649

5

5

126

124

556

664

577.6

524

524

551

562

581

696

696

669

5

5

130

128

B-97

max

ras

type N

db

4)Does not apply to side of the outer ring rib of type NF bearings.

Db

r1as type NU

da

min4)

max

max

(approx.)


● L Type Loose Rib L type collar ring B2

B2

r1

r1

B1

B1 φd φd1

φd φd1

NH=NJ+HJ

NUJ=NU+HJ

d 20 ∼ 60mm Dimensions

Bearing numbers

mm d

r1s min1)

Dimensions

kg

mm

B1

B2

29.9 29.5 29.9 29.5 31.8 31.1 31.8 31.1

3 3 3 3 4 4 4 4

6.75 5.5 7.5 6.5 7.5 6.5 8.5 7.5

0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6

HJ204 HJ204E HJ2204 HJ2204E HJ304 HJ304E HJ2304 HJ2304E

0.012 0.009 0.013 0.01 0.017 0.014 0.018 0.015

34.8 34.5 34.8 34.5 39 38 39 38 43.6

3 3 3 3 4 4 4 4 6

7.25 6. 7.5 6.5 8 7 9 8 10.5

0.6 0.6 0.6 0.6 1.1 1.1 1.1 1.1 1.5

HJ205 HJ205E HJ2205 HJ2205E HJ305 HJ305E HJ2305 HJ2305E HJ405

0.015 0.012 0.015 0.013 0.025 0.021 0.027 0.024 0.057

30

41.7 41.1 41.7 41.1 45.9 44.9 45.9 44.9 50.5

4 4 4 4 5 5 5 5 7

8.25 7 8.5 7.5 9.5 8.5 11.5 9.5 11.5

0.6 0.6 0.6 0.6 1.1 1.1 1.1 1.1 1.5

HJ206 HJ206E HJ2206 HJ2206E HJ306 HJ306E HJ2306 HJ2306E HJ406

0.025 0.017 0.025 0.02 0.039 0.035 0.043 0.035 0.08

35

47.6 48 47.6 48 50.8 51 50.8 51 59

4 4 4 4 6 6 6 6 8

8 7 8.5 8.5 11 9.5 14 11 13

0.6 0.6 0.6 0.6 1.1 1.1 1.1 1.1 1.5

HJ207 HJ207E HJ2207 HJ2207E HJ307 HJ307E HJ2307 HJ2307E HJ407

0.03 0.027 0.031 0.031 0.056 0.048 0.064 0.055 0.12

20

25

d1

Mass

d

(approx.)

d1

Bearing numbers

Mass kg

r1s min1)

B1

B2

40

54.2 53.9 54.2 53.9 58.4 57.6 58.4 57.6 64.8

5 5 5 5 7 7 7 7 8

9 8.5 9.5 9 12.5 11 14.5 12.5 13

1.1 1.1 1.1 1.1 1.5 1.5 1.5 1.5 2

HJ208 HJ208E HJ2208 HJ2208E HJ308 HJ308E HJ2308 HJ2308E HJ408

0.046 0.042 0.047 0.045 0.083 0.07 0.09 0.08 0.14

45

59 58.9 58.9 64 64.5 64 64.5 71.8

5 5 5 7 7 7 7 8

9.5 8.5 9 12.5 11.5 15 13 13.5

1.1 1.1 1.1 1.5 1.5 1.5 1.5 2

* HJ209 HJ209E HJ2209E HJ309 HJ309E HJ2309 HJ2309E HJ409

0.053 0.047 0.05 0.099 0.093 0.109 0.103 0.175

50

64.6 63.9 64.6 71 71.4 71 71.4 78.8

5 5 5 8 8 8 8 9

10 9 9.5 14 13 17 14.5 14.5

1.1 1.1 1.1 2 2 2 2 2.1

HJ210 * HJ210E HJ2210 HJ310 HJ310E HJ2310 HJ2310E HJ410

0.063 0.055 0.061 0.142 0.134 0.157 0.15 0.23

55

70.8 70.8 70.8 77.2 77.7 77.2 77.7 85.2

6 6 6 9 9 9 9 10

11 9.5 10 15 14 18.5 15.5 16.5

1.1 1.1 1.1 2 2 2 2 2.1

* HJ211 HJ211E HJ2211E HJ311 HJ311E HJ2311 HJ2311E HJ411

0.084 0.072 0.076 0.182 0.168 0.203 0.185 0.29

60

78.4 77.6

6 6

11 10

1.5 1.5

* HJ212 * HJ212E

0.108 0.094

(approx.)

1)Minimal allowable dimension for chamfer dimension r. Note: 1. This L type collar ring is used with NU type cylindrical roller bearings; in duplex arrangements with NJ or NU type bearing numbers, they become NH type and NUJ type respectively. For bearing dimensions, allowable rotations, and mass, please refer to pages B-80 to B-84. 2. " * " indicates L type collar rings that can also be used with dimension series 22 bearings.

B-98


● L Type Loose Rib

B2

B2

r1

r1

B1

B1 φd φd1

φd φd1

NH=NJ+HJ

NUJ=NU+HJ

d 60 ∼ 105mm Dimensions

Bearing numbers

mm d

r1s min1)

Mass

Dimensions

kg

mm

d1

B1

B2

60

84.2 84.6 84.2 84.6 91.8

9 9 9 9 10

15.5 14.5 19 16 16.5

2.1 2.1 2.1 2.1 2.1

HJ312 HJ312E HJ2312 HJ2312E HJ412

0.22 0.205 0.245 0.23 0.34

65

84.8 84.5 84.8 84.5 91 91 91 91 98.5

6 6 6 6 10 10 10 10 11

11 10 11.5 10.5 17 15.5 20 18 18

1.5 1.5 1.5 1.5 2.1 2.1 2.1 2.1 2.1

HJ213 HJ213E HJ2213 HJ2213E HJ313 HJ313E HJ2313 HJ2313E HJ413

0.123 0.111 0.126 0.118 0.28 0.25 0.304 0.29 0.42

70

89.6 89.5 89.5 98 98 98 98 110.5

7 7 7 10 10 10 10 12

12.5 11 11.5 17.5 15.5 20.5 18.5 20

1.5 1.5 1.5 2.1 2.1 2.1 2.1 3

* HJ214 HJ214E HJ2214E HJ314 HJ314E HJ2314 HJ2314E HJ414

0.15 0.13 0.138 0.33 0.293 0.358 0.35 0.605

75

94 94.5 94.5 104.2 104.6 104.2 104.6 116.0

7 7 7 11 11 11 11 13

12.5 11 11.5 18.5 16.5 21.5 19.5 21.5

1.5 1.5 1.5 2.1 2.1 2.1 2.1 3

* HJ215 HJ215E HJ2215E HJ315 HJ315E HJ2315 HJ2315E HJ415

0.156 0.141 0.164 0.4 0.35 0.432 0.41 0.71

101.2 101.7 111.8 111 111.8

8 8 11 11 11

13.5 12.5 19.5 17 23

2 2 2.1 2.1 2.1

* HJ216 * HJ216E HJ316 HJ316E HJ2316

0.207 0.193 0.47 0.405 0.511

80

Bearing numbers

Mass kg

B2

r1s min1)

d

d1

B1

80

111 122

11 13

20 22

2.1 3

85

108.2 107.7 107.7 117.5 118.4 117.5 118.4

8 8 8 12 12 12 12

14 12.5 13 20.5 18.5 24 22

2 2 2 3 3 3 3

* HJ217 HJ217E HJ2217E HJ317 HJ317E HJ2317 HJ2317E

0.25 0.21 0.216 0.56 0.505 0.606 0.55

90

114.2 114.6 114.2 114.6 125 124.7 125 124.7

9 9 9 9 12 12 12 12

15 14 16 15 21 18.5 26 22

2 2 2 2 3 3 3 3

HJ218 HJ218E HJ2218 HJ2218E HJ318 HJ318E HJ2318 HJ2318E

0.305 0.272 0.315 0.308 0.63 0.548 0.704 0.69

95

121 121 121 121 132 132.7 132 132.7

9 9 9 9 13 13 13 13

15.5 14.0 16.5 15.5 22.5 20.5 26.5 24.5

2.1 2.1 2.1 2.1 3 3 3 3

HJ219 HJ219E HJ2219 HJ2219E HJ319 HJ319E HJ2319 HJ2319E

0.352 0.304 0.363 0.335 0.76 0.7 0.826 0.8

100

128 128 128 128 140.5 140.3 140.5 140.3

10 10 10 10 13 13 13 13

17 15 18 16 22.5 20.5 27.5 23.5

2.1 2.1 2.1 2.1 3 3 3 3

HJ220 HJ220E HJ2220 HJ2220E HJ320 HJ320E HJ2320 HJ2320E

0.444 0.38 0.456 0.385 0.895 0.8 0.986 0.92

105

135.0

10

17.5

2.1

HJ221

0.505

(approx.)

(approx.)

HJ2316E HJ416

0.45 0.78

1)Minimal allowable dimension for chamfer dimension r. Note: 1. This L type collar ring is used with NU type cylindrical roller bearings; in duplex arrangements with NJ or NU type bearing numbers, they become NH type and NUJ type respectively. For bearing dimensions, allowable rotations, and mass, please refer to pages B-84 to B-88. 2. " * " indicates L type collar rings that can also be used with dimension series 22 bearings.

B-99


● L Type Loose Rib L type collar ring B2

B2

r1

r1

B1

B1 φd φd1

φd φd1

NH=NJ+HJ

NUJ=NU+HJ

d 105 ∼ 200mm Dimensions

Bearing numbers

mm r1s min1)

Mass

Dimensions

kg

mm

d

d1

B1

B2

105

147.0

13

22.5

3

HJ321

0.97

110

141.5 142.1 141.5 142.1 155.5 156.6 155.5 156.6

11 11 11 11 14 14 14 14

18.5 17 20.5 19.5 23 22 28 26.5

2.1 2.1 2.1 2.1 3 3 3 3

HJ222 HJ222E HJ2222 HJ2222E HJ322 HJ322E HJ2322 HJ2322E

0.615 0.553 0.645 0.605 1.17 1.09 1.28 1.25

153 153.9 153 153.9 168.5 169.2 168.5 169.2

11 11 11 11 14 14 14 14

19 17 22 20 23.5 22.5 28 26

2.1 2.1 2.1 2.1 3 3 3 3

HJ224 HJ224E HJ2224 HJ2224E HJ324 HJ324E HJ2324 HJ2324E

0.715 0.634 0.767 0.705 1.4 1.28 1.53 1.42

165.5 164.7 165.5 164.7 182 183 182 183

11 11 11 11 14 14 14 14

19 17 25 21 24 23 29.5 28

3 3 3 3 4 4 4 4

HJ226 HJ226E HJ2226 HJ2226E HJ326 HJ326E HJ2326 HJ2326E

0.84 0.684 0.953 0.831 1.62 1.53 1.8 1.75

179.5 180.2 179.5 180.2 196 196.8 196 196.8

11 11 11 11 15 15 15 15

19 18 25 23 26 25 33.5 31

3 3 3 3 4 4 4 4

HJ228 HJ228E HJ2228 HJ2228E HJ328 HJ328E HJ2328 HJ2328E

1 0.929 1.14 1.11 1.93 1.91 2.21 2.3

193

12

20.5

3

HJ230

1.24

120

130

140

150

Bearing numbers

Mass kg

r1s min1)

d

d1

B1

B2

150

194 193 194 210 211 210 211

12 12 12 15 15 15 15

19.5 26.5 24.5 26.5 25 34 31.5

3 3 3 4 4 4 4

HJ230E HJ2230 HJ2230E HJ330 HJ330E HJ2330 HJ2330E

1.18 1.39 1.42 2.37 2.25 2.69 2.6

160

207 207.8 207 206.6 225 223.2 225 223.2

12 12 12 12 15 15 15 15

21 20 28 24.5 28 25 37 32

3 3 3 3 4 4 4 4

HJ232 HJ232E HJ2232 HJ2232E HJ332 HJ332E HJ2332 HJ2332E

1.48 1.34 1.69 1.61 2.75 2.4 3.16 2.85

170

220.5 221.4 220.5 220.2 238 238

12 12 12 12 16 16

22 20 29 24 29.5 38.5

4 4 4 4 4 4

HJ234 HJ234E HJ2234 HJ2234E HJ334 HJ2334

1.7 1.51 1.93 1.82 3.25 3.71

180

230.5 231.4 230.5 230.2 252 252

12 12 12 12 17 17

22 20 29 24 30.5 40

4 4 4 4 4 4

HJ236 HJ236E HJ2236 HJ2236E HJ336 HJ2336

1.8 1.7 2.04 1.91 3.85 4.42

190

244.5 245.2 244.5 244 265 265

13 13 13 13 18 18

23.5 21.5 31.5 26.5 32 41.5

4 4 4 4 5 5

HJ238 HJ238E HJ2238 HJ2238E HJ338 HJ2338

2.2 1.94 2.52 2.38 4.45 5.05

200

258

14

25

4

HJ240

2.6

(approx.)

(approx.)

1)Minimal allowable dimension for chamfer dimension r. Note: 1. This L type collar ring is used with NU type cylindrical roller bearings; in duplex arrangements with NJ or NU type bearing numbers, they become NH type and NUJ type respectively. For bearing dimensions, allowable rotations, and mass, please refer to pages B-88 to B-94. 2. " * " indicates L type collar rings that can also be used with dimension series 22 bearings.

B-100


● L Type Loose Rib

B2

B2

r1 B1

r1 B1

φd φd1

NH=NJ+HJ

φd φd1

NUJ=NU+HJ

d 200 ∼ 320mm Dimensions

Bearing numbers

mm

Mass kg

r1s min1)

d

d1

B1

B2

200

259 258 257.8 280 280

14 14 14 18 18

23 34 28 33 44.5

4 4 4 5 5

HJ240E HJ2240 HJ2240E HJ340 HJ2340

2.35 2.99 2.86 5 5.76

220

286 307

15 20

27.5 36

4 5

HJ244 HJ344

3.55 7.05

240

313 335

16 22

29.5 39.5

4 5

HJ248 HJ348

4.65 8.2

260

340 362

18 24

33 43

5 6

HJ252 HJ352

6.2 11.4

280

360 390

18 26

33 46

5 6

HJ256 HJ356

7.39 13.9

300

387

20

34.5

5

HJ260

9.14

320

415

21

37

5

HJ264

(approx.)

11.3

1)Minimal allowable dimension for chamfer dimension r. Note: 1. This L type collar ring is used with NU type cylindrical roller bearings; in duplex arrangements with NJ or NU type bearing numbers, they become NH type and NUJ type respectively. For bearing dimensions, allowable rotations, and mass, please refer to pages B-94 to B-97. 2. " * " indicates L type collar rings that can also be used with dimension series 22 bearings.

B-101


● Double Row Cylindrical Roller Bearings

B

B r

r r

r

φd

φd φFW

φD

φD φEw

φd

Type NNU Cylindrical bore

φd

Type NN

Tapered bore

Cylindrical bore

Tapered bore

d 25 ∼ 110mm Boundary dimensions

Basic load ratings dynamic static dynamic static kN kgf

mm rs min2)

d

D

B

Cr

25

47

16

0.6

25.8

30

55

19

1

35

62

20

40

68

45

Cor

Limiting speeds min-1 grease

oil

Bearing type NNU cylindrical tapered1) bore bore

Cr

Cor

30.0

2 630

3 050

14 000

17 000

31.0

37.0

3 150

3 800

12 000

15 000

1

38.0

47.5

3 850

4 850

11 000

13 000

21

1

43.5

55.5

4 400

5 650

9 700

11 000

75

23

1

52.0

68.5

5 300

7 000

8 800

10 000

50

80

23

1

53.0

72.5

5 400

7 400

8 000

9 400

55

90

26

1.1

69.5

96.5

7 050

9 850

7 300

8 600

60

95

26

1.1

71.0

102

7 250

10 400

6 700

7 900

65

100

26

1.1

75.0

111

7 650

11 400

6 200

7 300

70

110

30

1.1

94.5

143

9 650

14 600

5 800

6 800

75

115

30

1.1

96.5

149

9 850

15 200

5 400

6 300

80

125

34

1.1

116

179

11 800

18 200

5 100

5 900

85

130

34

1.1

122

194

12 400

19 800

4 800

5 600

90

140

37

1.5

143

228

14 600

23 200

4 500

5 300

95

145

37

1.5

146

238

14 900

24 200

4 300

5 000

100

140 150

40 37

1.1 1.5

131 153

260 256

13 300 15 600

26 500 26 100

4 300 4 000

5 100 4 800

NNU4920 ―

NNU4920K ―

105

145 160

40 41

1.1 2

133 198

268 320

13 500 20 200

27 400 33 000

4 100 3 800

4 800 4 500

NNU4921 ―

NNU4921K ―

110

150 170

40 45

1.1 2

137 229

284 375

14 000 23 300

28 900 38 000

3 900 3 600

4 600 4 300

NNU4922 ―

NNU4922K ―

1)"K" indicates bearings have tapered bore with a taper ratio of 1: 12. 2)Smallest allowable dimension for chamfer dimension r.

B-102


● Double Row Cylindrical Roller Bearings

ra

ra

ra

ra

φda φdd φDb

φDa φdc

ra

φdb

φda φDb φDb φda

Dynamic equivalent radial load Pr=Fr Static equivalent radial load Por=Fr

numbers

Dimensions

type NN cylindrical tapered1) bore bore

Fw

NN3005

NN3005K

NN3006

Abutment and fillet dimensions

mm

Mass (approx.) kg type NNU type NN

mm da

db

dc

dd

Da

ras

cylindrical

tapered

Ew

min

min

max

min

max

max

min

max

bore

bore

41.3

29

30

43

42

0.6

0.124 0.121

NN3006K

48.5

35

36.5

50

49

1

0.199 0.193

NN3007

NN3007K

55

40

41.5

57

56

1

0.242 0.235

NN3008

NN3008K

61

45

47

63

62

1

0.312 0.303

NN3009

NN3009K

67.5

50

52

70

69

1

0.405 0.393

NN3010

NN3010K

72.5

55

57

75

74

1

0.433 0.419

NN3011

NN3011K

81

61.5

63.5

83.5

82

1

0.651 0.631

NN3012

NN3012K

86.1

66.5

68.5

88.5

87

1

0.704 0.683

NN3013

NN3013K

91

71.5

73.5

93.5

92

1

0.758 0.735

NN3014

NN3014K

100

76.5

79

103.5 101

1

1.04

1.01

NN3015

NN3015K

105

81.5

84

108.5 106

1

1.14

1.11

NN3016

NN3016K

113

86.5

89.5

118.5 114

1

1.52

1.47

NN3017

NN3017K

118

91.5

94.5

123.5 119

1

1.61

1.56

NN3018

NN3018K

127

98

101

132

129

1.5

2.07

2.01

NN3019

NN3019K

132

103

106

137

134

1.5

2.17

2.1

NN4920 NN3020

NN4920K 113 NN3020K ―

129 137

106.5 110 108 111

111 ―

115 ―

133.5 ―

133.5 131 142 139

1 1.83 1.5 ―

1.75 ―

1.75 2.26

1.67 2.19

NN4921 NN3021

NN4921K 118 NN3021K ―

134 146

111.5 115 114 117

116 ―

120 ―

138.5 ―

138.5 136 151 148

1 2

1.91 ―

1.82 ―

1.82 2.89

1.73 2.8

NN4922 NN3022

NN4922K 123 NN3022K ―

139 155

116.5 120 119 123

121 ―

125 ―

143.5 ―

143.5 141 161 157

1 2

1.99 ―

1.9 ―

1.9 3.69

1.81 3.56

B-103

Db

cylindrical tapered bore

bore


● Double Row Cylindrical Roller Bearings

B

B r

r r

r

φd

φd φFW

φD

φD φEw

φd

Type NNU Cylindrical bore

φd

Type NN

Tapered bore

Cylindrical bore

Tapered bore

d 120 ∼ 280mm Boundary dimensions

Basic load ratings dynamic static dynamic static kN kgf

mm d

D

B

120

165 180

45 46

130

180 200

140

rs min2)

Limiting speeds min-1 grease

oil

Bearing type NNU cylindrical tapered1) bore bore

Cr

Cor

Cr

Cor

1.1 2

183 233

360 390

18 700 23 700

37 000 40 000

3 600 3 300

4 200 3 900

NNU4924 ―

NNU4924K ―

50 52

1.5 2

220 284

440 475

22 400 29 000

45 000 48 500

3 300 3 100

3 900 3 600

NNU4926 ―

NNU4926K ―

190 210

50 53

1.5 2

227 298

470 515

23 100 30 500

48 000 52 500

3 000 2 800

3 600 3 300

NNU4928 ―

NNU4928K ―

150

210 225

60 56

2 2.1

345 335

690 585

35 000 34 000

70 500 60 000

2 800 2 600

3 300 3 100

NNU4930 ―

NNU4930K ―

160

220 240

60 60

2 2.1

355 375

740 660

36 500 38 000

75 500 67 500

2 600 2 500

3 100 2 900

NNU4932 ―

NNU4932K ―

170

230 260

60 67

2 2.1

360 440

765 775

37 000 45 000

78 000 79 000

2 500 2 300

2 900 2 700

NNU4934 ―

NNU4934K ―

180

250 280

69 74

2 2.1

460 565

965 995

46 500 57 500

98 500 102 000

2 300 2 200

2 700 2 600

NNU4936 ―

NNU4936K ―

190

260 290

69 75

2 2.1

475 580

1 030 1 040

48 500 59 000

105 000 106 000

2 200 2 000

2 600 2 400

NNU4938 ―

NNU4938K ―

200

280 310

80 82

2.1 2.1

555 655

1 180 1 170

56 500 66 500

120 000 119 000

2 100 1 900

2 400 2 300

NNU4940 ―

NNU4940K ―

220

300 340

80 90

2.1 3

585 815

1 300 1 480

59 500 83 000

132 000 151 000

1 900 1 700

2 200 2 100

NNU4944 ―

NNU4944K ―

240

320 360

80 92

2.1 3

610 855

1 410 1 600

62 500 87 000

144 000 163 000

1 700 1 600

2 000 1 900

NNU4948 ―

NNU4948K ―

260

360 400

100 104

2.1 4

900 1 060

2 070 1 990

92 000 108 000

211 000 203 000

1 600 1 500

1 800 1 700

NNU4952 ―

NNU4952K ―

280

380 420

100 106

2.1 4

925 1 080

2 200 2 080

94 500 110 000

224 000 212 000

1 400 1 300

1 700 1 600

NNU4956 ―

NNU4956K ―

1)"K" indicates bearings have tapered bore with a taper ratio of 1: 12. 2)Smallest allowable dimension for chamfer dimension r.

B-104


● Double Row Cylindrical Roller Bearings

ra

ra

ra

ra

ra

φda φdd φDb

φDa φdc

φdb

φda φDb φDb φda

Dynamic equivalent radial load Pr=Fr Static equivalent radial load Por=Fr

numbers

Dimensions

type NN cylindrical tapered1) bore bore

Abutment and fillet dimensions

mm Fw

Ew

da

db

dc

dd

mm Da

min

min

max

min

max

Mass (approx.) kg type NNU type NN

Db max

min

ras

cylindrical

tapered

max

bore

bore

bore

bore

cylindrical tapered

NN4924 NN3024

NN4924K 134.5 154.5 126.5 130 NN3024K ― 165 129 133

133 ―

137 ―

158.5 ―

158.5 156.5 171 167

1 2

2.75 ―

2.63 ―

2.63 3.98

2.51 3.83

NN4926 NN3026

NN4926K 146 NN3026K ―

168 182

138 139

142 143

144 ―

148 ―

172 ―

172 191

170 183

1.5 2

3.69 ―

3.52 ―

3.52 5.92

3.35 5.71

NN4928 NN3028

NN4928K 156 NN3028K ―

178 192

148 149

152 153

154 ―

158 ―

182 ―

182 201

180 194

1.5 2

3.94 ―

3.76 ―

3.76 6.44

3.58 6.21

NN4930 NN3030

NN4930K 168.5 196.5 159 NN3030K ― 206 161

164 166

166 ―

171 ―

201 ―

201 214

198.5 208

2 2

6.18 ―

5.9 ―

5.9 7.81

5.62 7.53

NN4932 NN3032

NN4932K 178.5 206.5 169 NN3032K ― 219 171

174 176

176 ―

182 ―

211 ―

211 229

208.5 221

2 2

6.53 ―

6.23 ―

6.24 8.92

5.94 8.59

NN4934 NN3034

NN4934K 188.5 216.5 179 NN3034K ― 236 181

184 187

186 ―

192 ―

221 ―

221 249

218.5 238

2 2

6.87 ―

6.55 6.56 6.24 ― 12.6 12.2

NN4936 NN3036

NN4936K 202 NN3036K ―

234 255

189 191

195 197

199 ―

205 ―

241 ―

241 269

236 257

2 2

9.9 ―

9.46 9.45 9.01 ― 16.6 16

NN4938 NN3038

NN4938K 212 NN3038K ―

244 265

199 201

205 207

209 ―

215 ―

251 ―

251 279

246 267

2 2

10.4 ―

9.94 9.93 9.47 ― 18 17.4

NN4940 NN3040

NN4940K 225 NN3040K ―

261 282

211 211

218 218

222 ―

228 ―

269 ―

269 299

264 285

2 2

14.7 ―

14 ―

14 21.6

13.3 20.8

NN4944 NN3044

NN4944K 245 NN3044K ―

281 310

231 233

238 240

242 ―

248 ―

289 ―

289 327

284 313

2 2.5

15.9 ―

15.2 ―

15.2 29.3

14.5 28.2

NN4948 NN3048

NN4948K 265 NN3048K ―

301 330

251 253

258 261

262 ―

269 ―

309 ―

309 347

304 333

2 2.5

17.2 ―

16.4 ―

16.4 32.8

15.6 31.6

NN4952 NN3052

NN4952K 292 NN3052K ―

336 364

271 276

279 285

288 ―

296 ―

349 ―

349 384

339 367

2 3

29.6 ―

28.3 ―

28.3 47.4

27 45.8

NN4956 NN3056

NN4956K 312 NN3056K ―

356 384

291 296

299 305

308 ―

316 ―

369 ―

369 404

359 387

2 3

31.6 ―

30.2 ―

30.2 51.1

28.8 49.3

B-105


● Double Row Cylindrical Roller Bearings

B

B r

r r

r

φd

φd φFW

φD

φD φEw

φd

Type NNU Cylindrical bore

φd

Type NN

Tapered bore

Cylindrical bore

Tapered bore

d 300 ∼ 500mm Boundary dimensions

Basic load ratings dynamic static dynamic static kN kgf

mm rs min2)

d

D

B

300

420 460

118 118

3 4

320

440 480

118 121

340

460 520

360

Cr

Limiting speeds min-1 grease

oil

Bearing type NNU cylindrical tapered1) bore bore

Cor

Cr

Cor

1 200 1 330

2 800 2 560

122 000 135 000

285 000 261 000

1 300 1 200

1 500 1 500

NNU4960 ―

NNU4960K ―

3 4

1 240 1 350

2 970 2 670

126 000 138 000

305 000 272 000

1 200 1 100

1 400 1 300

NNU4964 ―

NNU4964K ―

118 133

3 5

1 270 1 620

3 150 3 200

130 000 165 000

320 000 325 000

1 100 1 100

1 300 1 300

NNU4968 ―

NNU4968K ―

480 540

118 134

3 5

1 270 1 650

3 250 3 300

130 000 169 000

330 000 340 000

1 100 1 000

1 300 1 200

NNU4972 ―

NNU4972K ―

380

520 560

140 135

4 5

1 630 1 690

4 050 3 450

167 000 172 000

415 000 355 000

1 000 940

1 200 1 100

NNU4976 ―

NNU4976K ―

400

540 600

140 148

4 5

1 690 2 040

4 300 4 150

172 000 208 000

435 000 420 000

940 880

1 100 1 000

NNU4980 ―

NNU4980K ―

420

560 620

140 150

4 5

1 740 2 080

4 500 4 300

177 000 212 000

460 000 440 000

900 840

1 100 990

NNU4984 ―

NNU4984K ―

440

600 650

160 157

4 6

2 150 2 420

5 550 5 100

219 000 247 000

565 000 520 000

850 800

1 000 940

NNU4988 ―

NNU4988K ―

460

620 680

160 163

4 6

2 220 2 550

5 850 5 350

226 000 260 000

595 000 545 000

800 750

950 890

NNU4992 ―

NNU4992K ―

480

650

170

5

2 280

5 900

233 000

600 000

770

910

NNU4996

NNU4996K

500

670

170

5

2 360

6 200

240 000

635 000

730

860

NNU49/500

NNU49/500K

1)"K" indicates bearings have tapered bore with a taper ratio of 1: 12. 2)Smallest allowable dimension for chamfer dimension r.

B-106


● Double Row Cylindrical Roller Bearings

ra

ra

ra

ra

ra

φda φdd φDb

φDa φdc

φdb

φda φDb φDb φda

Dynamic equivalent radial load Pr=Fr Static equivalent radial load Por=Fr

numbers

Dimensions

type NN cylindrical tapered1) bore bore

Abutment and fillet dimensions

mm

Mass (approx.) kg type NNU type NN

da

db

dc

dd

mm Da

cylindrical

tapered

min

max

min

max

max

min

max

bore

bore

bore

bore

Db

ras

cylindrical tapered

Fw

Ew

min

NN4960 NN3060

NN4960K 339 NN3060K ―

391 418

313 316

323 326

335 ―

343 ―

407 ―

407 444

394 421

2.5 3

48.6 ―

46.4 ―

46.4 70.8

44.2 68.6

NN4964 NN3064

NN4964K 359 NN3064K ―

411 438

333 336

343 346

355 ―

363 ―

427 ―

427 464

414 441

2.5 3

51.4 ―

49.1 ―

49 76.2

46.7 73.5

― NN3068

― 379 NN3068K ―

― 473

353 360

363 371

375 ―

383 ―

447 ―

― 500

― 477

2.5 4

54.2 ―

51.7 ―

― 102

― NN3072

― 398 NN3072K ―

― 493

373 380

383 391

394 ―

402 ―

467 ―

― 520

― 497

2.5 4

57 ―

54.4 ―

― 107

― 103

― NN3076

― 425 NN3076K ―

― 512

396 400

408 411

420 ―

430 ―

504 ―

― 540

― 516

3 4

84.5 ―

80.6 ―

― 113

― 109

― NN3080

― 445 NN3080K ―

― 547

416 420

428 432

440 ―

450 ―

524 ―

― 580

― 551

3 4

88.2 ―

84.1 ―

― 146

― 141

― NN3084

― 465 NN3084K ―

― 567

436 440

448 452

460 ―

470 ―

544 ―

― 600

― 571

3 4

92 ―

87.7 ―

― 154

― 148

― NN3088

― 492 NN3088K ―

― 596

456 464

469 477

487 ―

497 ―

584 ―

― 626

― 601

3 5

127 ―

121 ―

― 178

― 172

― NN3092

― 512 NN3092K ―

― 622

476 484

489 498

507 ―

517 ―

604 ―

― 656

― 627

3 5

132 ―

126 ―

― 202

― 195

― 98.5

534

500

514

531

541

630

4

156

149

556

520

534

551

561

650

4

162

155

B-107


● Four-Row Cylindrical Roller Bearings

C1 r1 r B1 φD

φd φFW

Drawing 1

d 120 ∼ 200mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm

kN rs min1)

r1s min1)

92 105

2.5 2.5

104

104

210

116

145

210 225

d

D

B1

120

180 180

92 105

130

200

140

C1

static kgf

Cr

Cor

Cr

Cor

2.5 2.5

400 445

785 855

40 500 45 500

80 000 87 000

2.5

2.5

490

955

49 500

97 000

116

2.5

2.5

510

1 030

52 000

105 000

155 156

155 156

2.5 2.5

2.5 2.5

705 810

1 640 1 750

71 500 82 500

168 000 178 000

150

220 230 230 250

150 130 156 150

150 130 156 150

2.5 2.5 2.5 2.5

2.5 2.5 2.5 2.5

750 725 930 885

1 640 1 520 2 040 1 640

76 500 73 500 95 000 90 500

168 000 155 000 208 000 167 000

160

220 230 230 240

180 130 168 170

180 130 168 170

2.5 2.5 2.5 2

2.5 2.5 2.5 2.5

920 665 915 980

2 490 1 340 2 170 2 290

93 500 68 000 93 500 100 000

254 000 136 000 222 000 234 000

170

230 240 240 250 255 260 260

120 156 160 168 180 150 225

120 156 160 168 180 150 225

2.5 2.5 2.5 2.5 2.5 2.5 2.5

2.5 2.5 2.5 2.5 2.5 2.5 2.5

620 905 905 970 1 100 835 1 310

1 520 2 170 2 180 2 220 2 430 1 750 3 150

63 000 92 500 92 000 99 000 112 000 85 000 134 000

155 000 222 000 222 000 226 000 247 000 179 000 320 000

180

250 260 265

156 168 180

156 168 180

2.5 2.5 2.5

2.5 2.5 2.5

895 1 020 1 090

2 180 2 400 2 510

91 500 104 000 111 000

223 000 244 000 256 000

190

260 270 270 280

168 170 200 200

168 170 200 200

2.5 2.5 2.5 2.5

2.5 2.5 2.5 2.5

980 1 090 1 260 1 240

2 600 2 660 3 100 2 910

100 000 111 000 128 000 126 000

265 000 272 000 315 000 297 000

200

270 280 280

170 190 200

170 190 200

2.5 2.5 2.5

2.5 2.5 2.5

970 1 190 1 310

2 610 3 150 3 300

99 000 121 000 134 000

266 000 320 000 335 000

1)Minimal allowable dimension for chamfer dimension r or r1. 2)An oil hole and groove are provided in the center of the outer ring. The oil groove is not provided on the side.

B-108


â—? Four-Row Cylindrical Roller Bearings

Bearing numbers

Dimensions Drawing no.

Mass kg

Fw

(approx.)

4R2437 4R2438

137 135

1 1

8.2 9.3

4R2628

150

1

12.1

4R2823

160

1

13.9

4R2906 4R2908

166 169

1 1

18 23.4

4R3031 4R3029 4R3040 4R3039

168 174 174 177

1 1 1 1

19.4 20 24.5 29.6

4R3224 4R3226 4R3232 4R3225

177 180 179 183

1 1 1 1

20.2 16.6 23.4 27.8

4R3426 4R3429 4R3423 4R3432 4R3425 4R3433 4R3431

187 189 190 193 193 192 196

1 1 1 1 1 1 1

14.2 22.2 22.8 28.2 19.3 29.5 44

4R3625 4R3628 4R3618

200 202 204

1 1 1

23.2 29.4 34.2

4R3820 4R3818 4R3821 4R3823

212 213 212 214

1 1 1 2) 1

26.9 31.7 37.5 41.5

4R4039 4R4026 4R4037

222 223 222

1 1 1

28.5 36.7 40.5

Note: Drawing 1 represents a bearing with solid rollers and machined cage.

B-109


● Four-Row Cylindrical Roller Bearings

C1

C1 r1

r1

r

r B1

B1

φD

φd φFW

φd φFW

φD

Drawing 1

Drawing 2

d 200 ∼ 300mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm

kN

static kgf

rs min1)

r1s min1)

192 216

2.5 3

2.5 3

1 290 1 750

3 150 3 650

132 000 179 000

320 000 375 000

192

192

2.5

2.5

1 230

3 350

126 000

340 000

220

290 300 310 310 310 310 310 320 320

192 160 192 204 215 225 265 160 210

192 160 192 204 215 225 265 160 210

2.5 2.5 2.5 2.5 2.5 2.5 2.5 3 2.5

2.5 2.5 2.5 2.5 2.5 2.5 2.5 3 2.5

1 190 1 000 1 390 1 420 1 530 1 480 1 630 1 190 1 550

3 350 2 590 3 400 3 750 3 750 3 950 4 500 2 550 3 650

122 000 102 000 141 000 144 000 156 000 151 000 167 000 121 000 158 000

340 000 264 000 350 000 385 000 380 000 405 000 460 000 260 000 370 000

230

330 340

206 260

206 260

2.5 3

2.5 3

1 520 2 050

3 800 5 100

155 000 209 000

385 000 520 000

240

330 340 360

220 220 220

220 220 220

3 3 2.5

3 3 2.5

1 490 1 670 1 760

4 150 4 200 4 050

152 000 170 000 179 000

420 000 425 000 415 000

250

350

220

220

3

3

1 730

4 300

176 000

440 000

260

370 380

220 280

220 280

3 3

3 3

1 760 2 420

4 450 6 250

179 000 247 000

455 000 635 000

270

380

280

280

2.5

2.5

2 580

6 850

263 000

700 000

280

390 390 420

220 275 280

220 275 280

3 2.5 4

3 2.5 4

1 780 2 290 2 430

4 650 6 250 6 150

181 000 233 000 248 000

475 000 635 000 630 000

290

410 420

240 300

240 300

3 3

3 3

2 240 2 830

5 550 7 500

228 000 288 000

565 000 765 000

300

400 420 420 420

300 240 300 300

300 240 300 300

3 3 3 3

3 3 3 3

2 480 2 020 2 720 2 900

7 500 5 450 7 600 7 850

253 000 206 000 278 000 295 000

765 000 555 000 775 000 800 000

d

D

B1

200

290 320

192 216

210

290

C1

Cr

Cor

Cr

1)Minimal allowable dimension for chamfer dimension r or r1. 2)An oil hole and groove are provided in the center of the outer ring. 3)An oil hole and groove are not provided on the outer ring spacer.

B-110

Cor


â—? Four-Row Cylindrical Roller Bearings

Bearing numbers

Dimensions Drawing no.

Mass kg

Fw

(approx.)

4R4041 4R4028

226 231

1 1

42.5 67

4R4206

236

1

39.5

4R4413 4R4419 4R4426 4R4425 4R4420 4R4416 4R4430 4R4428 4R4429

239 245 246 247 242 245 245 245 248

1 1 1 1 1 1 1 1 1

33.8 32.8 46.9 49.8 51.5 54.9 63.5 46.5 60.5

4R4614 4R4611

258 261

1 1

58.6 82.6

4R4811 4R4806 4R4807

270 268 274

1 1 1

56.8 63.6 79.6

4R5008

278

1

66

4R5217 4R5213

292 294

1 1

76.5 109

4R5405

299.7

2

105

4R5611 4R5612 4R5605

312 312 323

1 1 1

81.3 105 139

4R5806 4R5805

320 327

1 1

103 141

E-4R6014 E-4R6017 E-4R6015 E-4R6020

328 334 334 332

1 1 1 2

104 106 125 130

2)

3)

Note: Drawing 1 represents a bearing with solid rollers and machined cage; Drawing 2 represents a bearing with hollow rollers and pin type cage.

B-111


● Four-Row Cylindrical Roller Bearings

C1

C1 r1

r1

r

r B1

B1

φD

φd φFW

φd φFW

φD

Drawing 1

Drawing 2

d 300 ∼ 460mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm

kN

static kgf

rs min1)

r1s min1)

300 270

3 3

3 3

2 900 2 510

7 850 5 350

295 000 256 000

800 000 545 000

240

240

3

3

2 240

5 950

228 000

605 000

320

440 450 460 470

240 240 340 350

230 240 340 350

3 3 3 3

3 3 3 3

2 290 2 370 3 400 4 150

6 050 6 150 9 450 10 900

234 000 242 000 345 000 425 000

615 000 630 000 960 000 1 110 000

330

440 460

200 340

200 340

3 4

3 4

1 820 3 250

4 850 8 850

186 000 330 000

495 000 905 000

340

480 490

370 300

350 300

5 4

5 4

3 450 3 350

9 650 8 300

350 000 340 000

985 000 845 000

360

510

400

400

5

5

4 250

11 500

435 000

1 170 000

370

480 520

230 400

230 400

5 5

5 5

2 100 4 650

6 250 13 500

214 000 475 000

635 000 1 370 000

380

520 520 540

280 300 400

280 300 400

4 4 4

4 4 4

3 400 3 550 5 200

9 150 9 600 15 200

350 000 360 000 530 000

935 000 980 000 1 550 000

400

560 560

400 410

400 410

5 4

5 4

4 250 5 750

11 800 17 000

430 000 585 000

1 210 000 1 730 000

410

546

400

400

5

5

4 200

12 700

430 000

1 290 000

420

560 580 620

280 230 400

280 230 400

4 4 5

4 4 5

3 150 2 430 5 000

8 750 6 250 13 400

320 000 248 000 510 000

895 000 635 000 1 360 000

440

620

450

450

5

5

6 450

18 700

660 000

1 910 000

460

620 620 650

400 400 470

400 400 470

4 4 5

4 4 5

5 350 4 950 7 150

16 700 15 000 20 600

545 000 505 000 730 000

1 700 000 1 530 000 2 100 000

d

D

B1

300

420 460

320 270

310

430

C1

Cr

Cor

Cr

Cor

1)Minimal allowable dimension for chamfer dimension r or r1. 2)Oil inlet and oil groove are in center of the outer ring; no oil groove on the side. 3)Oil inlet in space of outer ring; no oil groove. 4)One-piece inner ring.

B-112


â—? Four-Row Cylindrical Roller Bearings

Bearing numbers

Dimensions Drawing no.

Mass kg

Fw

(approx.)

E-4R6018 E-4R6019

332 344

2 1

136 162

E-4R6202

344.5

1

108

E-4R6414 E-4R6411 E-4R6412 E-4R6406

351 358 360 361.7

1 1 1 2

106 125 178 212

E-4R6603 E-4R6605

360 365

1 1

83.6 181

E-4R6811 E-4R6804

378 377

1 1

198 187

E-4R7203

397

1

262

E-4R7405 E-4R7404

400 409

1 1

106 273

E-4R7605 E-4R7607 E-4R7604

417 416 422

1 3) 2 3) 2

174 210 325

E-4R8007 E-4R8010

446 445

1 2

303 349

E-4R8201

444

1

256

E-4R8403 E-4R8404 E-4R8401

457 466 478

1 1 1

189 181 410

E-4R8801

487

2

437

E-4R9211 E-4R9209 E-4R9216

502 502 509

2 1 2

2)

2)

2)

3)4)

383 341 540

Note: Drawing 1 represents a bearing with solid rollers and machined cage; Drawing 2 represents a bearing with hollow rollers and pin type cage.

B-113


● Four-Row Cylindrical Roller Bearings

C1

C1 r1

r1

r

r B1

B1

φD

φd φFW

φd φFW

φD

Drawing 1

Drawing 2

d 480 ∼ 690mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm B1

kN

d

D

C1

480

650 650 680

420 450 500

420 450 500

500

680 690 690 700 710 720

420 470 510 515 480 530

510

670 700

520

rs min1)

r1s min1)

static kgf

Cr

Cor

Cr

Cor

5 5 9.5X20° 5 6 6

5 950 7 100 7 950

18 100 21 600 24 000

605 000 720 000 810 000

1 840 000 2 200 000 2 450 000

405 470 510 515 480 530

5 5 5 5 6 5

5 5 5 5 6 5

7 100 7 650 7 750 7 900 8 650 8 250

22 900 22 500 24 600 24 100 24 700 25 000

725 000 780 000 790 000 805 000 880 000 840 000

2 340 000 2 290 000 2 500 000 2 450 000 2 520 000 2 550 000

320 540

320 540

5 6

5 6

4 550 8 300

13 500 25 000

465 000 845 000

1 380 000 2 550 000

700 735

540 535

540 535

6 5

6 5

8 200 9 000

25 500 26 600

835 000 915 000

2 600 000 2 710 000

530

700 760 780

540 520 570

540 520 570

6 6 6

6 6 6

7 850 9 150 10 300

25 400 26 700 29 100

800 000 935 000 1 050 000

2 590 000 2 730 000 2 970 000

550

800

520

520

6

6

9 450

27 000

965 000

2 750 000

560

680

360

360

3

3

4 650

16 500

475 000

1 680 000

570

815

594

594

6

6

11 800

34 500

1 200 000

3 500 000

600

820 870 870

575 540 640

575 540 640

6 7.5 7.5

10 000 10 600 13 600

31 500 29 600 40 500

1 020 000 1 090 000 1 390 000

3 200 000 3 000 000 4 150 000

610

870

660

660

9.5

7.5

12 600

40 000

1 280 000

4 100 000

650

920 920

670 690

670 690

7.5 7.5

4 7.5

14 600 14 300

46 000 46 500

1 490 000 1 460 000

4 700 000 4 750 000

660

820

440

440

5

4

7 300

27 800

745 000

2 840 000

690

980

715

715

7.5

7.5

16 800

54 500

1 720 000

5 550 000

12X20° 7.5 7.5

1)Minimal allowable dimension for chamfer dimension r or r1. 2)Oil inlet and oil groove are in center of the outer ring; no oil groove on the side. 3)Oil inlet in space of outer ring; no oil groove.

B-114


â—? Four-Row Cylindrical Roller Bearings

Bearing numbers

Dimensions Drawing no.

Mass kg

Fw

(approx.)

E-4R9607 E-4R9609 E-4R9604

523 525 532

2 4) 2 2

4)

369 395 640

E-4R10010 E-4R10016 E-4R10006 E-4R10011 E-4R10008 E-4R10015

550 547 552 554 556 568

2 2 2 2 2 2

3)

495 590 640 680 675 780

E-4R10201 E-4R10202

554 558

2 2

4)

335 689

E-4R10403 E-4R10402

564 574.5

2 2

658 740

E-4R10603 E-4R10601 E-4R10602

574 590 601

2 2 2

626 800 1 010

E-4R11001

622

2

965

E-4R11202

590

1

265

E-4R11402

628

2

1 040

E-4R12003 E-4R12002 E-4R12001

655 672 672

2 2 2

980 1 150 1 330

E-4R12202

680

2

E-4R13005 E-4R13003

723 723

2 2

1 500 1 550

E-4R13201

702

2

580

E-4R13802

767.5

2

1 850

2)

1 400

4One-piece inner ring. Note: Drawing 1 represents a bearing with solid rollers and machined cage; Drawing 2 represents a bearing with hollow rollers and pin type cage.

B-115


● Four-Row Cylindrical Roller Bearings

C1

C1 r1

r1

r

r B1

B1

φD

φd φFW

φd φFW

φD

Drawing 1

Drawing 2

d 700 ∼ 1 200mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm

kN C1

rs min1)

620

620

15X20°

1 000

715

715

725

1 000

700

750

1 050 1 090

760

d

D

700

930

710

B1

r1s min1)

static kgf

Cr

Cor

Cr

Cor

6

12 900

43 000

1 320 000

4 400 000

9.5

6

16 800

54 500

1 710 000

5 550 000

700

6

6

15 900

53 500

1 620 000

5 450 000

745 745

720 720

7.5 7.5

7.5 7.5

17 600 19 100

58 000 60 500

1 790 000 1 950 000

5 900 000 6 150 000

1 030 1 080 1 100

750 805 745

750 790 720

7.5 6 7.5

7.5 6 7.5

17 300 18 700 19 100

59 500 61 000 60 500

1 760 000 1 900 000 1 950 000

6 050 000 6 250 000 6 150 000

800

1 080 1 080

700 750

700 750

7.5 6

7.5 6

16 500 17 300

55 000 59 000

1 680 000 1 760 000

5 600 000 6 000 000

820

1 130 1 130 1 160

800 825 840

800 800 840

7.5 7.5 7.5

7.5 7.5 7.5

19 600 19 600 21 600

66 500 66 500 71 000

2 000 000 2 000 000 2 200 000

6 800 000 6 800 000 7 250 000

840

1 160

840

840

5

7.5

21 600

71 000

2 200 000

7 250 000

850

1 150 1 150 1 180 1 180

650 800 650 850

650 800 650 850

9.5 6 7.5 9.5

9.5 6 7.5 9.5

15 700 19 700 16 400 24 100

51 000 71 000 51 500 78 500

1 610 000 2 010 000 1 670 000 2 460 000

5 200 000 7 250 000 5 250 000 8 000 000

860

1 160

735

710

6

6

17 800

62 500

1 810 000

6 400 000

900

1 230

895

870

7.5

7.5

24 700

88 000

2 520 000

9 000 000

920

1 280

865

850

7.5

7.5

26 200

88 500

2 670 000

9 000 000

1000

1 310 1 360

880 800

880 800

9.5 7.5

9.5 7.5

23 400 25 000

88 500 85 000

2 380 000 2 550 000

9 000 000 8 650 000

1030

1 380

850

850

7.5

7.5

24 400

89 000

2 490 000

9 100 000

1200

1 590

1 050

1 050

7.5

7.5

36 000

133 000

3 650 000

13 600 000

1)Minimal allowable dimension for chamfer dimension r or r1. 2)Inner ring is divided into four. 3)The oil hole of the outer ring is provided with fitting nozzle for oil mist.

B-116


â—? Four-Row Cylindrical Roller Bearings

Bearing numbers

Dimensions Drawing no.

Mass kg

Fw

(approx.)

E-4R14003

763

2

E-4R14205

787.5

2

1 900

E-4R14501

796

2

1 730

E-4R15001 E-4R15002

830 845

2 3) 2

3)

2 180 2 530

E-4R15204 E-4R15207 E-4R15203

828 845 855

2 3) 2 3) 2

3)

2 000 2 550 2 560

E-4R16004 E-4R16005

870 880

2 2

1 950 2 090

E-4R16406 E-4R16405 E-4R16403

903 903 910

2 2 2

2 450 2 520 2 930

E-4R16801

920

2

2 840

E-4R17001 E-4R17003 E-4R17004 E-4R17002

941 930 945 928

2 2 2 2

1 980 2 430 2 270 2 970

E-4R17201

940

2

2 310

E-4R18001

985

2

3 250

E-4R18401

1 015

2

3 560

E-4R20001 E-4R20002

1 080 1 090

2 2

3 260 3 530

E-4R20601

1 124

2

3 800

E-4R24002

1 295

2

2)

3)

3)

2)

1 200

6 220

Note: Drawing 2 represents a bearing with hollow rollers and pin type cage.

B-117


●Tapered Roller Bearings

Single row tapered roller bearings

Double row tapered roller bearings

Four row tapered roller bearings

1. Types, design features, and characteristics Tapered roller bearings are designed so the tapered vertex of the raceway surfaces of the inner and outer rings and rollers converge at one point on the centerline of the bearing. Due to this design feature, rollers move along the center of the raceway surfaces. The tapered rollers are guided by the compound force of the inner and outer raceway surfaces which keep them pressed up against the large rib on the inner ring. A large variety of these bearings, including single, double, and four row arrangements, are in use both in metric and inch series.

Diagram 1.

Table 1 Tapered roller bearing types and characteristics Type

Characteristics (1) There are both metric and inch series, and they have been standardized as shown in the following table. Dimension series Metric series Regulations Basic number

Inch series

¡JIS B 1512 ¡ISO 355 

¡ABMA (includes metric J-series)

Example, 30210     *T2EE040

Inner ring no. / outer ring no. ("J" appears at the beginning of the basic number in the case of J-series.)

*Dimension series previously not covered by 3XX are regulated under JIS B 1512;  dimensions previously missing from 3XX will henceforth use the bearing number.

(2) In addition to level type, there are also medium contact angle and large contact angle types, and the contact angle code C and D, respectively, is appended to the basic numbers of the latter two types.

Single row tapered roller bearings

(3) Subunits Tapered roller bearings can be disassembled into parts ― the inner ring, rollers, and cage (collectively known as the "cone") ― and the outer ring (known as the "cup"). These are the bearing’s "subunits". Subunit dimensions are standardized under ISO or ABMA standards, and unified subunits are interchangeable within each dimensional standard. However, high precision grade bearings are generally not interchangeable, and these subunits must be used by assembling only subunits with identical manufacturing numbers. Aside from any cautionary notes that may appear, the single row tapered roller bearings listed in the dimension tables have subunits standardized for both metric and inch systems (including J series). (Refer to Diagram 2) Subunit dimensions

E

E : Outer ring (cup) nominal small-end diameter α : Nominal contact angle Diagram 2.

Continued on next page

B-119


●Tapered Roller Bearings

Table 1 (continued) Type

Characteristics (4) These bearings are constructed to have a high capacity for radial loads, axial loads, and combined loads. The larger the contact angle, the greater the axial load capacity becomes. When a pure radial load is placed on the bearings, an induced load in the axial direction is also generated, and so these bearings are generally used in pairs arranged face to face.

Single row tapered roller bearings

(5) When used in pairs, proper internal clearances and preload can be set by adjusting the distance between the two bearings' inner and outer rings. (6) Single row tapered roller bearings are separable, so both the inner and outer rings can be used with tight fits. (7) Tapered roller bearings are also manufactured with flanges attached to the outer rings. For more details, contact NTN Engineering. (Refer to Diagram 3)

Double row tapered roller bearings

Diagram 3.

(1) Back-to-back arrangement (using double row outer rings) and face-toface arrangement (using double row inner rings) are both available, and they have been adjusted so that each type's internal clearance values are fixed. Therefore, only parts with identical manufacturing numbers can be used and they must be assembled according to their code numbers. (Refer to Diagram 4) (2) The axial internal clearances for double and duplex bearings are listed in Table 8, 9 on pages A-58. (3) Pairs of duplex single row tapered roller bearings are also manufactured. For more details, contact NTN Engineering.

Face-to-face Back-to-back Diagram 4.

(1) As shown in Diagram 5, four row tapered roller bearings are constructed of two double row inner rings and two double row outer rings. Four row tapered roller bearings

(2) Life of large bearings is extended by using case hardened steel, hollow rollers and pin-type cages. (3) Used primarily where heavy load capacity is important, and in the roller necks of rolling mills. Diagram 5.

2. Standard cage type

4. Precautions when using

In general, pressed cages are used in tapered roller bearings. However, for large sized bearings, machined or pin type cages are also used; and for small sized bearings, molded resin cages are also used.

If bearing load is light during operation, or if the ratio of axial to radial load for duplex and double row bearings exceeds the value of e, slipping develops between the rollers and raceway, sometimes resulting in smearing. The mass of rollers and cages particularly tends to be large for large tapered roller bearings. For details, please contact NTN Engineering.

3. Allowable misalignment Single row and back-to-back arrangement: ⋯⋯⋯0.0005rad(1.5') Face-to-face arrangement: ⋯⋯⋯⋯0.001rad (3.5') In situations where large displacement is necessary, please consult NTN Engineering. B-120


â—?Tapered Roller Bearings

5. ECO-Top tapered roller bearings In recent years, there has been an increasing demand for small and medium tapered roller bearings that contribute to energy savings, higher output, longer life, higher speed and more efficient assembly, particularly for automobiles. NTN Engineering is responding to this demand by providing bearings with special specifications based on 4Top tapered roller bearings, which are standard bearings. In order to contribute to the ecology movement, in addition to enhancing existing special specifications, NTN Engineering has developed the next-generation NTN Engineering tapered roller bearing ECO-Top tapered roller bearing having improved long life, low torque, anti-seizure, easy assembly specifications. The features are as follows (compared with NTN Engineering standard bearings): (1) Ten times longer life using contaminated lubricant (2) Two times longer life using clean lubricant (3) At least 10% lower torque in practical rotation range (4) 25% better anti-seizure performance (5) Two times better loss-of-preload resistance (6) Half reduced number of revolutions to stable assembled bearing width For details, please contact NTN Engineering.

Eco-Top tapered roller bearings

B-121


●Tapered Roller Bearings Inch series Tapered Roller Bearings (single row) index Series number

Cone / cup number

335 335 335 355 355 355 355 355 365 365 365 365 365 365 365 365 385 385 385 385 385 385 385 385 385 385 395 395 395 395 395 395 395 415 415 435 435 455 455 455 455 455 455 455 475 475 475 475 475 495 495 495 495 495

336/332 339/332 344/332 350A/354A 355/354A 358/354A 359A/354A 359S/352 365/362A 366/362A 367/362A 368/362A 368A/362 368S/362A 369A/362A 370A/362A 385/382A 385A/382A 386A/382A 387/382A 387A/382A 387A/382A 387S/382A 388A/382A 389/382A 389A/382A 390/394A 390A/394A 392/394A 395A/394A 396/394A 397/394A 399A/394A 418/414 420/414 436/432 438/432 455/453X 460/453X 462/453X 463/453X 469/453A 469/453X 469/454 477/472 480/472 482/472 483/472 484/472 495/493 495A/493 495AS/493 496/493 497/492A

Page of bearing dimension table B-159 B-155 B-157 B-157 B-159 B-161 B-161 B-161 B-163 B-163 B-161 B-163 B-163 B-165 B-161 B-163 B-167 B-167 B-161 B-167 B-167 B-167 B-167 B-167 B-167 B-165 B-167 B-169 B-169 B-171 B-163 B-169 B-171 B-157 B-157 B-161 B-159 B-167 B-159 B-167 B-161 B-167 B-167 B-167 B-169 B-171 B-171 B-169 B-173 B-175 B-173 B-175 B-175 B-177

Series number

Cone / cup number

495 525 525 525 535 535 535 555 555 555 555 555 555 555 565 565 565 565 565 575 575 575 575 575 575 575 595 595 595 595 595 595 615 615 615 635 635 635 635 635 655 655 655 655 655 655 675 675 675 675 745 745 745 745

498/493 527/522 528/522 529/522 537/532X 539/532X 543/532X 555/552A 555S/552A 557S/552A 558/552A 559/552A 560/552A 560S/552A 565/563 566/563 567/563 567A/563 568/563 575/572 575S/572 576/572 577/572 580/572 581/572 582/572 593/592A 594/592A 594A/592XE 595/592A 596/592A 598A/592A 619/612 621/612 623/612 639/632 641/632 641/633 643/632 644/632 655/653 659/653 661/653 663/652 663/653 665/653 681/672 683/672 685/672 687/672 740/742 744/742 745A/742 748S/742

B-122

Page of bearing dimension table B-177 B-159 B-161 B-165 B-165 B-165 B-157 B-165 B-167 B-165 B-169 B-169 B-171 B-171 B-169 B-171 B-173 B-173 B-173 B-173 B-173 B-173 B-173 B-175 B-175 B-175 B-177 B-179 B-179 B-175 B-177 B-177 B-165 B-165 B-167 B-169 B-171 B-171 B-171 B-173 B-171 B-173 B-175 B-175 B-175 B-177 B-177 B-179 B-179 B-179 B-175 B-173 B-171 B-173

Series number

Cone / cup number

745 745 755 755 755 755 755 775 775 795 795 835 835 835 855 895 895 935 935 935 1200 1300 1300 1700 1700 1700 1700 1900 1900 1900 2400 2500 2500 2500 2500 2500 2500 2600 2600 2600 2600 2600 2700 2700 2700 2700 2700 2700 2700 2700 2800 2800 2900 3100

749/742 749A/742 756A/752 757/752 758/752 759/752 760/752 780/772 782/772 799/792 799A/792 835/832 842/832 850/832 861/854 896/892 898/892 936/932 938/932 941/932 1280/1220 1380/1328 1380/1329 1755/1729 1775/1729 1779/1729 1780/1729 1985/1930 1985/1931 1985/1932 2474/2420 2558/2523 2578/2523 2580/2520 2580/2523 2582/2523 2585/2523 2682/2631 2687/2631 2688/2631 2689/2631 2690/2631 2776/2720 2780/2720 2785/2720 2788/2720 2789/2720 2793/2720 2793/2729 2793/2735X 2878/2820 2879/2820 2984/2924 3187/3120

Page of bearing dimension table B-177 B-175 B-175 B-175 B-177 B-177 B-177 B-179 B-179 B-181 B-181 B-171 B-175 B-177 B-179 B-183 B-183 B-179 B-171 B-179 B-147 B-147 B-147 B-147 B-147 B-149 B-149 B-149 B-151 B-151 B-151 B-151 B-151 B-153 B-153 B-153 B-153 B-149 B-149 B-149 B-151 B-151 B-157 B-155 B-153 B-157 B-157 B-153 B-155 B-153 B-153 B-153 B-161 B-151


●Tapered Roller Bearings Inch series Tapered Roller Bearings (single row) index Series number

Cone / cup number

Page of bearing dimension table

3100 3100 3100 3300 3300 3300 3300 3400 3400 3400 3400 3500 3500 3500 3500 3500 3500 JS3500 3700 3700 3700 3700 3700 3700 3700 3700 3700 3700 3800 3800 3800 3900 3900 3900 3900 3900 3900 A4000 A4000 4300 4300 5300 5500 5500 5500 5700 A6000 6200 6300 6300 6400 6400 6400 6500

3188/3120 3193/3120 3196/3120 3379/3320 3382/3321 3382/3339 3386/3320 3476/3420 3478/3420 3479/3420 3490/3420 3576/3525 3578/3520 3578/3525 3579/3525 3580/3525 3586/3525 JS3549A/JS3510 3767/3720 3775/3720 3776/3720 3777/3720 3778/3720 3780/3720 3780/3726 3780/3732 3781/3720 3782/3720 3872/3820 3875/3820 3880/3820 3975/3920 3979/3920 3980/3920 3982/3920 3984/3925 3994/3920 A4050/A4138 A4059/A4138 4388/4335 4395/4335 5395/5335 5578/5535 5583/5535 5584/5535 5760/5735 A6075/A6157 6277/6220 6379/6320 6386/6320 6460/6420 6461/6420 6461A/6420 6559C/6535

B-153 B-153 B-153 B-155 B-157 B-157 B-157 B-153 B-155 B-155 B-157 B-159 B-159 B-159 B-159 B-157 B-161 B-154 B-165 B-163 B-161 B-161 B-161 B-163 B-163 B-163 B-163 B-159 B-154 B-157 B-159 B-165 B-167 B-169 B-169 B-171 B-171 B-147 B-147 B-159 B-159 B-163 B-165 B-169 B-169 B-173 B-147 B-161 B-171 B-171 B-173 B-175 B-173 B-175

Series number

Cone / cup number

6500 6500 02400 02400 02400 02800 02800 02800 02800 03000 05000 05000 05000 05000 07000 07000 07000 07000 07000 07000 07000 07000 07000 09000 09000 09000 09000 09000 11000 11000 11500 LM11700 LM11900 12000 12500 M12600 M12600 LM12700 13600 13600 13800 14000 14000 14000 14000 14000 14000 14000 14000 15000 15000 15000 15000 15000

6576/6535 6580/6535 02474/02420 02475/02420 02476/02420 02872/02820 02875/02820 02877/02820 02878/02820 03062/03162 05062/05185 05066/05185 05075/05185 05079/05185 07079/07196 07087/07196 07093/07196 07096/07196 07097/07196 07098/07196 07100/07196 07100/07204 07100S/07196 09062/09195 09067/09195 09067/09196 09078/09195 09081/09195 11162/11300 11162/11315 11590/11520 LM11749/LM11710 LM11949/LM11910 12175/12303 12580/12520 M12648/M12610 M12649/M12610 LM12749/LM12711 13685/13621 13687/13621 13889/13830 14116/14274 14116/14276 14117A/14276 14124/14276 14125A/14276 14130/14276 14137A/14276 14139/14276 15100/15245 15101/15243 15102/15245 15103/15245 15106/15245

B-123

Page of bearing dimension table B-175 B-177 B-151 B-153 B-153 B-151 B-153 B-153 B-153 B-147 B-147 B-147 B-147 B-147 B-147 B-147 B-149 B-149 B-149 B-149 B-149 B-149 B-149 B-147 B-147 B-147 B-147 B-147 B-157 B-157 B-147 B-147 B-147 B-159 B-147 B-147 B-147 B-147 B-155 B-155 B-155 B-151 B-151 B-151 B-153 B-153 B-153 B-153 B-155 B-149 B-149 B-149 B-149 B-149

Series number

Cone / cup number

15000 15000 15000 15000 15000 15000 15000 15000 15000 15500 15500 15500 16000 17000 17000 17000 17500 18500 18600 18600 18700 18700 19000 21000 22700 23000 24700 25500 25500 25500 25500 25500 25500 25500 25500 25500 25500 25500 25800 25800 25800 26800 26800 26800 26800 26800 26800 26800 27600 27600 27600 27600 27800 28000

15112/15245 15116/15245 15117/15245 15118/15245 15119/15245 15120/15245 15123/15245 15125/15245 15126/15245 15580/15523 15590/15520 15590/15523 16137/16284 16150/16282 17118/17244 17119/17244 17580/17520 18590/18520 18685/18620 18690/18620 18790/18720 18790/18724 19150/19281 21075/21212 22780/22720 23100/23256 24780/24720 25572/25520 25577/25520 25578/25520 25580/25520 25582/25520 25584/25520 25590/25519 25590/25520 25590/25522 25590/25526 25592/25520 25877/25820 25877/25821 25880/25821 26878/26822 26880/26822 26882/26823 26882/26824 26883/26822 26884/26822 26885/26822 27687/27620 27689/27620 27690/27620 27691/27620 27880/27820 28150/28300

Page of bearing dimension table B-151 B-151 B-151 B-151 B-151 B-151 B-151 B-151 B-153 B-149 B-149 B-151 B-153 B-155 B-151 B-151 B-147 B-157 B-159 B-161 B-163 B-163 B-155 B-147 B-159 B-149 B-157 B-157 B-159 B-159 B-159 B-159 B-161 B-161 B-161 B-161 B-161 B-161 B-153 B-153 B-155 B-157 B-157 B-157 B-159 B-155 B-159 B-157 B-175 B-175 B-175 B-175 B-157 B-157


●Tapered Roller Bearings Inch series Tapered Roller Bearings (single row) index Series number

Cone / cup number

Page of bearing dimension table

28000 28000 28500 28500 28500 28600 28600 28600 28900 28900 28900 29500 29500 29500 29500 29600 29600 29600 29600 LM29700 31500 31500 31500 33000 33000 33000 33000 33800 33800 33800 33800 34000 34000 34000 34000 36600 36900 37000 37000 39500 39500 39500 39500 39500 41000 42000 42000 42000 42000 42000 42600 42600 43000 44000

28150/28315 28158/28300 28579/28521 28580/28521 28584/28521 28678/28622 28680/28622 28682/28622 28985/28921 28990/28920 28995/28920 29585/29520 29585/29521 29586/29520 29590/29520 29675/29620 29675/29630 29685/29620 29688/29620 LM29748/LM29710 31593/31520 31594/31520 31597/31520 33225/33462 33275/33462 33281/33462 33287/33462 33885/33821 33889/33821 33890/33821 33895/33822 34274/34478 34300/34478 34301/34478 34306/34478 36690/36620 36990/36920 37425/37625 37431/37625 39575/39520 39580/39520 39581/39520 39585/39520 39590/39520 41125/41286 42346/42584 42350/42584 42368/42584 42375/42584 42381/42584 42687/42620 42690/42620 43131/43312 44143/44348

B-157 B-157 B-163 B-163 B-165 B-163 B-167 B-167 B-169 B-169 B-169 B-169 B-169 B-169 B-171 B-171 B-171 B-173 B-173 B-155 B-155 B-155 B-155 B-167 B-171 B-173 B-173 B-159 B-163 B-165 B-165 B-171 B-173 B-173 B-175 B-183 B-183 B-179 B-179 B-165 B-167 B-167 B-169 B-171 B-151 B-177 B-177 B-177 B-179 B-179 B-173 B-175 B-153 B-155

Series number

Cone / cup number

44000 44000 L44600 L44600 L44600 45200 45200 45200 45200 45200 L45400 46000 46000 46000 46000 47400 47400 47600 47600 47600 47800 47800 48200 48200 48300 48300 LM48500 LM48500 48600 48600 49500 52000 52000 52000 52000 53000 53000 55000C 55000C 55000C 55000C 56000 59000 64000 64000 65000 65000 66000 66000 66000 66000 LM67000 67300 67300

44150/44348 44158/44348 L44640/L44610 L44643/L44610 L44649/L44610 45280/45220 45282/45220 45284/45220 45287/45220 45289/45220 L45449/L45410 46162/46368 46175/46368 46780/46720 46790/46720 47487/47420 47490/47420 47678/47620 47681/47620 47686/47620 47890/47820 47896/47820 48286/48220 48290/48220 48385/48320 48393/48320 LM48548/LM48510 LM48548A/LM48510 48684/48620 48685/48620 49585/49520 52375/52618 52387/52618 52393/52618 52400/52618 53162/53375 53177/53375 55175C/55437 55176C/55437 55187C/55437 55200C/55443 56425/56650 59200/59412 64433/64700 64450/64700 65237/65500 65390/65320 66200/66462 66225/66462 66584/66520 66589/66520 LM67048/LM67010 67388/67322 67389/67322

B-124

Page of bearing dimension table B-157 B-157 B-149 B-149 B-149 B-161 B-163 B-165 B-165 B-167 B-151 B-159 B-159 B-183 B-183 B-171 B-173 B-173 B-175 B-175 B-177 B-179 B-181 B-181 B-183 B-183 B-153 B-153 B-183 B-183 B-165 B-179 B-179 B-179 B-179 B-159 B-159 B-161 B-161 B-163 B-165 B-179 B-165 B-181 B-181 B-169 B-163 B-165 B-167 B-165 B-167 B-151 B-181 B-181

Series number

Cone / cup number

Page of bearing dimension table

67300 67300 67700 68000 68000 L68100 L69300 71000 72000 72000C 72000C 72000C 72000C LM72800 74000 74000 74000 78000 78000 78000C LM78300 LM78300 M84500 M86600 M86600 M86600 M88000 HM88500 HM88500 HM88500 HM88500 HM88600 HM88600 HM88600 HM89400 HM89400 HM89400 HM89400 HM89400 HM89400 HM89400 90000 90000 95000 95000 95000 97000 99000 99000 LM102900 LM104900 LM104900 LM104900 M205100

67390/67322 67391/67322 67790/67720 68450/68712 68462/68712 L68149/L68111 JL69349/JL69310 71453/71750 72188/72487 72200C/72487 72212C/72487 72218C/72487 72225C/72487 LM72849/LM72810 74500/74850 74525/74850 74550/74850 78225/78551 78250/78551 78214C/78551 LM78349/LM78310C LM78349A/LM78310A M84548/M84510 M86643/M86610 M86647/M86610 M86649/M86610 M88048/M88010 JHM88540/JHM88513 HM88542/HM88510 HM88542/HM88512 HM88547/HM88510 HM88648/HM88610 HM88648/HM88611AS HM88649/HM88610 HM89440/HM89410 HM89443/HM89410 HM89444/HM89410 HM89446/HM89410 HM89448/HM89410 HM89449/HM89410 HM89449/HM89411 J90354/J90748 90381/90744 95475/95925 95500/95905 95525/95925 97500/97900 99550/99100 99575/99100 LM102949/LM102910 JLM104948/JLM104910 LM104947A/LM104911 LM104949/LM104911 JM205149/JM205110

B-183 B-183 B-183 B-181 B-181 B-155 B-155 B-181 B-163 B-165 B-165 B-167 B-167 B-149 B-181 B-183 B-183 B-167 B-169 B-165 B-155 B-155 B-149 B-149 B-151 B-151 B-153 B-151 B-153 B-153 B-153 B-155 B-155 B-153 B-153 B-153 B-153 B-155 B-155 B-155 B-155 B-177 B-179 B-181 B-181 B-183 B-181 B-183 B-183 B-161 B-163 B-163 B-163 B-163


●Tapered Roller Bearings Inch series Tapered Roller Bearings (single row) index Series number

Cone / cup number

Page of bearing dimension table

M207000 H211700 HM212000 HM212000 HM212000 L217800 LL217800 HM218200 HH221400 HH221400 HH221400 HH221400 HH221400 HH224300 HH224300 HH224300 HH228300 M231600 LM300800 H307700 HM318400 L319200 L327200 H414200 H414200 H414200 H415600 L432300 LM501300 LM501300 LM503300 HH506300 HH506300 LM506800 LM508700 M511900 M515600 HM516400 HM516400 HM516800 LM522500 LM522500 HM522600 HM534100 LM603000 L610500 M612900 HM617000 L630300 LL639200 LM704600 LM710900 LM714100 M714200

JM207049/JM207010 B-167 JH211749/JH211710 B-171 HM212044/HM212011 B-169 HM212046/HM212011 B-169 HM212049/HM21210 B-171 L217849/L217810 B-177 LL217849/LL217810 B-177 HM218248/HM218210 B-177 HH221430/HH221410 B-175 HH221431/HH221410 B-175 HH221440/HH221410 B-179 HH221449/HH221410 B-179 HH221449A/HH221410 B-179 HH224334/HH224310 B-179 HH224335/HH224310 B-179 HH224346/HH224310 B-181 HH228349/HH228310 B-181 M231648/M231610 B-183 LM300849/LM300811 B-157 JH307749/JH307710 B-167 JHM318448/JHM318410 B-177 L319249/L319210 B-179 L327249/L327210 B-181 H414242/H414210 B-171 H414245/H414210 B-171 H414249/H414210 B-173 JH415647/JH415610 B-173 L432349/L432310 B-183 LM501349/LM501310 B-157 LM501349/LM501314 B-157 LM503349A/LM503310 B-161 HH506348/HH506310 B-163 HH506349/HH506310 B-163 JLM506849/JLM506810 B-165 JLM508748/JLM508710 B-167 JM511946/JM511910 B-169 JM515649/JM515610 B-175 HM516442/HM516410 B-173 HM516448/HM516410 B-175 JHM516849/JHM516810 B-177 LM522546/LM522510 B-179 LM522548/LM522510 B-181 JHM522649/JHM522610 B-181 JHM534149/JHM534110 B-183 LM603049/LM603011 B-164 L610549/L610510 B-169 JM612949/JM612910 B-171 HM617049/HM617010 B-177 L630349/L630310 B-183 LL639249/L639210 B-183 JLM704649/JLM704610 B-163 JLM710949/JLM710910 B-169 JLM714149/JLM714110 B-173 JM714249/JM714210 B-173

Series number

Cone / cup number

H715300 H715300 H715300 H715300 M716600 M718100 M719100 M720200 L724300 M736100 M738200 HM801300 HM801300 M802000 HM803100 HM803100 M804000 M804800 M804800 M804800 HM804800 HM804800 LM806600 HM807000 HM807000 HM807000 HM807000 HM807000 HM807000 L812100 LM813000 HM813800 HM813800 HM813800 HM813800 L814700 LM814800 M822000 HM903200 HM903200 M903300 HM907600 HM911200 HM911200 HM911200 H913800 H913800 H913800 H917800 H924000 HM926700 HM926700

H715334/H715311 B-169 H715343/H715311 B-171 H715345/H715311 B-173 H715348/H715311 B-175 JM716648/JM716610 B-177 JM718149/JM718110 B-177 JM719149/JM719113 B-177 JM720249/JM720210 B-179 JL724348/JL724314 B-181 JM736149/JM736110 B-183 JM738249/JM738210 B-183 HM801346/HM801310 B-157 HM801349/HM801310 B-157 M802048/M802011 B-159 HM803145/HM803110 B-159 HM803149/HM803110 B-159 M804048/M804010 B-161 M804846/M804810 B-161 M804848/M804810 B-163 M804849/M804810 B-163 HM804840/HM804810 B-159 HM804842/HM804810 B-159 LM806649/LM806610 B-165 HM807040/HM807010 B-161 HM807044/HM807010 B-163 HM807046/HM807010 B-163 HM807048/HM807010 B-165 HM807049/HM807010 B-165 JHM807045/JHM807012 B-163 L812148/L812111 B-171 JLM813049/JLM813010 B-171 HM813840/HM813810 B-167 HM813841/HM813810 B-169 HM813842/HM813810 B-169 HM813844/HM813810 B-171 L814749/L814710 B-173 LM814849/LM814810 B-175 JM822049/JM822010 B-181 HM903245/HM903210 B-159 HM903249/HM903210 B-159 M903345/M903310 B-159 HM907643/HM907614 B-165 HM911242/HM911210 B-165 HM911245/HM911210 B-169 HM911244/JHM911211 B-169 H913840/H913810 B-167 H913842/H913810 B-169 JH913848/JH913811 B-173 H917840/H917810 B-175 H924045/H924010 B-181 HM926740/HM926710 B-181 HM926747/HM926710 B-181

B-125

Page of bearing dimension table


●Tapered Roller Bearings

Inch series Tapered Roller Bearings (four row) index

Series number

Cone / cup number

Page of bearing dimension table

Series number

Cone / cup number

Page of bearing dimension table

8500

T-8576D/8520/8520D

B-205

M263300

M263349D/M263310/M263310D

B-209

46700

46791D/46720/46721D

B-203

HM265000

HM265049D/HM265010/HM265010D

B-211

48200

T-48290D/48220/48220D

B-203

HM266400

T-HM266449D/HM266410/HM266410DG2

B-211

48300

T-48393D/48320/48320D

B-203

M268700

T-M268749D/M268710/M268710DG2

B-211

48600

T-48680D/48620/48620D

B-203

M270700

M270749D/M270710/M270710DAG2

B-211

67700

67791D/67720/67721D

B-203

LM272200

LM272249D/LM272210/LM272210DG2

B-213

67800

T-67885D/67820/67820D

B-205

M274100

M274149D/M274110/M274110DG2

B-213

81000

81576D/81962/81963D

B-203

LM274400

LM274449D/LM274410/LM274410D

B-213

82600

82681D/82620/82620D

B-203

275000

EE275106D/275155/275156D

B-207

126000

EE126096D/126150/126151D

B-205

275000

EE275109D/275160/275161D

B-207

127000

EE127097D/127137/127137D

B-205

M275300

M275349D/M275310/M275310DG2

B-213

132000

EE132082D/132125/132126D

B-205

M276400

M276449D/M276410/M276410DG2

B-213

134000

EE134102D/134143/134144D

B-207

M278700

M278749D/M278710/M278710DAG2

B-213

L163100

L163149D/L163110/L163110D

B-209

LM278800

LM278849D/LM278710/LM278710D

B-215

170000

EE171000D/171450/17145D

B-205

280000

EE280700D/281200/281201D

B-203

220000

EE221027D/221575/221576D

B-207

M280000

M280049D/M280010/M280010DG2

B-215

M224700

M224749D/M224710/M224710D

B-203

L281100

L281149D/L281110/L281110DG2

B-215

M231600

T-M231649D/M231610/M231610D

B-203

M281600

M281649D/M281610/M281610DG2

B-215

M238800

M238849D/M238810/M238810D

B-203

LM281800

LM281849D/LM281810/LM281810DG2

B-215

M241500

M241538D/M241510/M241510D

B-205

M282200

M282249D/M282210/M282210DG2

B-215

M244200

T-M244249D/M244210/M244210D

B-205

M283400

M283449D/M283410/M283410DG2

B-215

LM247700

LM247748D/LM247710/LM247710DA

B-205

LM283600

LM283649D/LM283610/LM283610DG2

B-215

M249700

T-M249748D/M249710/M249710D

B-205

M284200

M284249D/M284210/M284210DG2

B-215

HM252300

HM252349D/HM252310/HM252310D

B-207

M285800

M285848D/M285810/M288510DG2

B-215

M252300

T-M252349D/M252310/M252310D

B-207

LM286200

LM286249D/LM286210/LM286210DG2

B-217

M255400

M255449D/M255410/M255410DA

B-207

LM287600

LM287649D/LM2876100/LM287610DG2

B-217

HM256800

T-HM256849D/HM256810/HM256810DG2

B-207

LM288900

LM288949D/LM288910/LM288910DG2

B-217

M257100

M257149D/M257110/M257110D

B-207

290000

EE291202D/291750/291751D

B-207

M257200

M257248D/M257210/M257210D

B-209

329000

EE329119D/329172/329173D

B-207

LM258600

LM258649D/LM258610/LM258610D

B-209

LM377400

LM377449D/LM377410/LM377410DG2

B-213

HM259000

T-HM259049D/HM259010/HM259010D

B-209

LM451300

T-LM451349D/LM451310/LM451310D

B-207

HM261000

HM261049D/HM261010/HM261010DA

B-209

526000

EE526131D/526190/52619D

B-209

M262400

M262449D/M262410/M262410D

B-209

547000

EE547341D/547480/547481DG2

B-217

HM262700

T-HM262749D/HM262710/HM262710DG2

B-209

640000

T-EE640193D/640260/640261DG2

B-203

LM263100

LM263149D/LM263110/LM263110D

B-209

649000

EE649241D/649310/649311DG2

B-215

B-126


●Tapered Roller Bearings

Inch series Tapered Roller Bearings (four row) index

Series number

Cone / cup number

Page of bearing dimension table

LM654600

T-LM654644D/LM654610/LM654610D

B-207

LM654600

T-LM654648D/LM654610/LM654610D

B-207

655000

EE655271D/655345/655346DG2

B-215

LM665900

LM665949D/LM665910/LM665910D

B-211

M667900

M667947D/M667911/M667911DG2

B-211

700000

EE700090D/700167/700168D

B-205

LM742700

T-LM742749D/LM742714/LM742714D

B-205

755000

EE755281D/755360/755361DG2

B-215

M757400

M757448D/M757410/M757410D

B-207

M757400

M757449D/M757410/M757410D

B-209

LM761600

LM761648D/LM761610/LM761610D

B-209

LM761600

LM761649D/LM761610/LM761610D

B-209

LM763400

LM763449D/LM763410/LM763410D

B-209

LM765100

LM765149D/LM765110/LM765110D

B-211

LM767700

LM767745D/LM767710/LM767710D

B-211

LM767700

LM767749D/LM767710/LM767710D

B-211

LM769300

LM769349D/LM769310/LM769310D

B-211

L770800

L770849D/L770810/L770810DG2

B-213

LM772700

LM772749D/LM772710/LM772710DA

B-213

LM778500

LM778549D/LM778510/LM778510DG2

B-215

822000

EE822101D/822175/822176D

B-205

833000

EE833161D/833232/833233D

B-211

843000

EE843221D/843290/843291D

B-213

LM869400

T-LM869449D/LM869410/LM869410DG2

B-211

910000

EE911603D/912400/912401D

B-211

920000

EE921150D/921875/921876D

B-207

970000

EE971355D/972100/972103D

B-209

B-127


● Tapered Roller Bearings Metric series T r1

C

r B φd

φD

a

d 15 ∼ 30mm Boundary dimensions

Basic load ratings dynamic static dynamic static kN kgf

mm d

D

T

B

C

rs min

1)

r

1) ls min

Limiting speeds

Bearing numbers

min-1

Cr

Cor

Cr

Cor

grease

oil

15

42

14.25

13

11

1

1

23.2

20.8

2 370

2 120

9 900

13 000

4T-30302

17

40 40 40 47

13.25 17.25 17.25 15.25

12 16 16 14

11 14 14 12

1 1 1 1

1 1 1 1

20.5 27.3 26.2 28.9

20.3 28.3 28.2 26.3

2 090 2 790 2 670 2 940

2 070 2 880 2 870 2 680

9 900 9 900 9 900 9 000

13 000 13 000 13 000 12 000

4T-30203 4T-32203 4T-32203R2) 4T-30303

20

42 47 47 52 52 52

15 15.25 19.25 16.25 16.25 22.25

15 14 18 16 16 21

12 12 15 13 12 18

0.6 1 1 1.5 1.5 1.5

0.6 1 1 1.5 1.5 1.5

24.9 28.2 36.5 35.5 31.0 46.5

27.9 28.7 39.5 34.0 31.0 48.5

2 540 2 870 3 700 3 600 3 150 4 750

2 840 2 930 4 000 3 450 3 150 4 950

9 500 8 800 8 800 8 000 7 600 8 000

13 000 12 000 12 000 11 000 10 000 11 000

4T-32004X 4T-30204 4T-32204 4T-30304A 4T-30304CA 4T-32304

22

44

15

15

11.5

0.6

0.6

27.0

31.5

2 760

3 250

8 900

12 000

4T-320/22X

25

47 47 52 52 52 52 52 52 62 62 62 62

15 17 16.25 19.25 19.25 19.25 19.25 22 18.25 18.25 18.25 25.25

15 17 15 18 18 18 18 22 17 17 17 24

11.5 14 13 16 15 15 15 18 15 14 13 20

0.6 0.6 1 1 1 1 1 1 1.5 1.5 1.5 1.5

0.6 0.6 1 1 1 1 1 1 1.5 1.5 1.5 1.5

27.8 32.5 31.5 42.0 38.0 38.0 34.5 47.5 48.5 41.5 40.5 61.5

33.5 40.5 34.0 47.0 43.0 46.5 42.0 57.5 47.5 41.5 43.5 64.5

2 830 3 300 3 200 4 300 3 850 3 900 3 500 4 850 4 950 4 250 4 150 6 250

3 450 4 150 3 450 4 800 4 400 4 750 4 250 5 850 4 850 4 250 4 450 6 600

7 900 8 000 7 300 7 300 7 300 7 100 7 100 7 300 6 700 6 400 5 900 6 700

11 000 11 000 9 800 9 800 9 800 9 400 9 400 9 800 8 900 8 500 7 800 8 900

4T-32005X 4T-33005 4T-30205 4T-32205 4T-32205R2) 4T-32205C 4T-32205CR2) 4T-33205 4T-30305 4T-30305C 4T-30305D 4T-32305

28

52 58

16 24

16 24

12 19

1 1

1 1

33.0 58.0

40.5 69.5

3 400 5 950

4 150 7 100

7 300 6 700

9 700 8 900

4T-320/28X 4T-332/28

30

55 55 62 62 62 62 72

17 20 17.25 21.25 21.25 25 20.75

17 20 16 20 20 25 19

13 16 14 17 17 19.5 16

1 1 1 1 1 1 1.5

1 1 1 1 1 1 1.5

37.5 42.5 43.5 54.5 50.0 65.0 60.0

46.0 54.0 48.0 64.0 60.0 77.0 61.0

3 800 4 300 4 450 5 600 5 100 6 600 6 100

4 700 5 500 4 900 6 550 6 100 7 850 6 200

6 900 6 900 6 300 6 300 6 100 6 300 5 700

9 200 9 200 8 400 8 400 8 100 8 400 7 600

4T-32006X 4T-33006 4T-30206 4T-32206 4T-32206C 4T-33206 4T-30306

1)Minimal allowable dimension for chamfer dimension r or r1. 2)This bearing does not incorporate the subunit dimensions.

B-128


● Tapered Roller Bearings

Sb

Sa

Equivalent radial load dynamic Pr=XFr+YFa Fa Fa ≦e Fr Fr >e X Y X Y 1 0 0.4 Y2 static Por=0.5Fr+YoFa

r1 a ra φDa φdb

φda φDb

When Por<Fr use Por=Fr

For values of e, Y2 and Yo see the table below.

Dimensions series to ISO

Abutment and fillet dimensions

Load Constant center mm

mm da

db

Da

min

max

max

min

Axial load factors

Mass kg

Db

Sa

Sb

ras

r1as

min

min

min

max

max

a

e

Y2

Yo

(approx.)

2FB

20.5

22

36.5

35

38

2

3

1

1

9.5

0.29

2.11

1.16

0.098

2DB 2DD

22.5 22.5 22.5 22.5

23 23 22 24

34.5 34.5 34.5 41.5

33 33 33 40

37 37 36.5 42

2 2 2 3

2 3 3 3.5

1 1 1 1

1 1 1 1

9.5 11.5 11 10.5

0.35 0.31 0.35 0.29

1.74 1.92 1.74 2.11

0.96 1.06 0.96 1.16

0.08 0.102 0.104 0.134

2FD

24.5 25.5 25.5 28.5 28.5 28.5

25 27 26 28 27.5 27

37.5 41.5 41.5 43.5 43.5 43.5

36 40 39 42.5 39.5 43

39 44 43 47.5 48 47

3 2 2 3 3 3

3 3 4 3 4 4

0.6 1 1 1.5 1.5 1.5

0.6 1 1 1.5 1.5 1.5

10.5 11.5 12.5 10.5 13.5 14

0.37 0.35 0.33 0.30 0.55 0.30

1.60 1.74 1.81 2.00 1.10 2.00

0.88 0.96 1.00 1.10 0.60 1.10

0.097 0.127 0.16 0.176 0.17 0.245

3CC

26.5

27

39.5

38

41

3

3.5

0.6

0.6

11

0.40

1.51

0.83

0.106

4CC 2CE 3CC 2CD

7FB 2FD

29.5 29.5 30.5 30.5 30.5 30.5 30.5 30.5 33.5 33.5 33.5 33.5

30 29 31 31 31 30 30 30 34 34 34 32

42.5 42.5 46.5 46.5 46.5 46.5 46.5 46.5 53.5 53.5 53.5 53.5

40 40 44 43 43 42 42 43 52 48 45.5 52

44 43.5 48 49.5 48 49 49 49 57 58 58.5 57

3 3 2 2 2 2 2 4 3 3 3 3

3.5 3 3 4 4 4 4 4 3 4 5 5

0.6 0.6 1 1 1 1 1 1 1.5 1.5 1.5 1.5

0.6 0.6 1 1 1 1 1 1 1.5 1.5 1.5 1.5

12 11 12.5 14 13.5 16 16 14 13 16 20 16

0.43 0.29 0.37 0.36 0.37 0.58 0.55 0.35 0.30 0.55 0.83 0.30

1.39 2.07 1.60 1.67 1.60 1.03 1.10 1.71 2.00 1.10 0.73 2.00

0.77 1.14 0.88 0.92 0.88 0.57 0.60 0.94 1.10 0.60 0.40 1.10

0.114 0.13 0.154 0.187 0.181 0.19 0.19 0.217 0.272 0.264 0.284 0.381

4CC 2DE

33.5 33.5

33 34

46.5 52.5

45 49

49 55

3 5

4 5

1 1

1 1

12.5 15.5

0.43 0.34

1.39 1.77

0.77 0.97

0.146 0.293

4CC 2CE 3DB 3DC 5DC 2DE 2FB

35.5 35.5 35.5 35.5 35.5 35.5 38.5

35 35.5 37 37 35 36 40

49.5 49.5 56.5 56.5 56.5 56.5 63.5

48 46.5 53 52 49 53 62

52 52 57 58 59.5 59 66

3 3 2 2.5 2 5 3

4 4 3 4 5 5.5 4.5

1 1 1 1 1 1 1.5

1 1 1 1 1 1 1.5

13.5 13 13.5 15.5 18.5 16 15

0.43 0.29 0.37 0.37 0.56 0.34 0.31

1.39 2.06 1.60 1.60 1.07 1.76 1.90

0.77 1.13 0.88 0.88 0.59 0.97 1.05

0.166 0.201 0.241 0.301 0.294 0.344 0.408

2FB 3CC 2DB 2DD 2FB

5CD 2DE 2FB

B-129


● Tapered Roller Bearings Metric series T r1

C

r B φd

φD

a

d 30 ∼ 45mm Boundary dimensions

Basic load ratings dynamic static dynamic static kN kgf

mm d

D

1)

1) ls min

Limiting speeds

Bearing numbers

min-1

Cr

Cor

Cr

Cor

grease

1.5 1.5 1.5 1.5 1.5

58.5 48.5 81.0 79.0 70.0

58.5 51.5 90.0 94.0 88.5

6 000 4 950 8 250 8 050 7 150

5 950 5 250 9 150 9 550 9 050

5 500 5 000 5 700 5 500 5 500

7 300 6 700 7 600 7 300 7 300

4T-30306CA 4T-30306D 4T-32306 * 4T-32306C 4T-32306CR2)

1 1 1.5

1 1 1.5

37.0 70.5 84.0

46.5 85.0 102

3 750 7 200 8 600

4 750 8 650 10 400

6 600 6 000 5 200

8 700 8 000 6 900

4T-320/32X 4T-332/32 4T-323/32C

11.5 14 17 15 19 19 18 22 18 17 15 25 25

0.6 1 1 1.5 1.5 1.5 1.5 1.5 2 2 2 2 2

0.6 1 1 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5

27.4 41.5 50.5 55.5 72.5 68.0 62.0 87.5 75.0 66.5 63.5 101 93.0

37.5 52.5 66.5 61.5 87.0 85.5 78.5 109 77.0 68.5 70.0 115 117

2 790 4 250 5 150 5 650 7 400 6 950 6 300 8 900 7 650 6 750 6 450 10 300 9 500

3 850 5 350 6 800 6 250 8 900 8 750 8 000 11 200 7 900 7 000 7 100 11 700 12 000

6 800 6 100 6 100 5 500 5 500 5 300 5 300 5 500 5 000 4 800 4 400 5 000 4 800

9 000 8 100 8 100 7 400 7 400 7 100 7 100 7 400 6 600 6 400 5 800 6 600 6 400

32907XU 4T-32007X 4T-33007 4T-30207 4T-32207 4T-32207C 4T-32207CR2) 4T-33207 4T-30307 4T-30307C 4T-30307D 4T-32307 4T-32307C

15 19 22 26 18 23 32 32.5 23 23 23 33 33

12 14.5 18 20.5 16 19 25 28 20 19 17 27 27

0.6 1 1 1.5 1.5 1.5 1.5 2.5 2 2 2 2 2

0.6 1 1 1.5 1.5 1.5 1.5 2 1.5 1.5 1.5 1.5 1.5

32.5 50.0 59.5 79.5 61.0 79.5 103 118 91.5 83.0 77.0 122 110

48.0 65.5 82.5 103 67.0 93.5 132 144 102 87.0 85.5 150 140

3 350 5 100 6 050 8 100 6 250 8 100 10 500 12 000 9 350 8 450 7 850 12 500 11 300

4 900 6 650 8 400 10 500 6 850 9 550 13 400 14 700 10 400 8 900 8 700 15 300 14 300

5 900 5 300 5 300 5 200 4 900 4 900 4 900 4 600 4 400 4 200 3 900 4 400 4 200

7 800 7 100 7 100 6 900 6 600 6 600 6 600 6 200 5 900 5 600 5 200 5 900 5 600

32908XU 4T-32008X 4T-33008 4T-33108 4T-30208 4T-32208 4T-33208 4T-T2EE040 4T-30308 4T-30308C 4T-30308D 32308U 4T-32308C

15

12

0.6

0.6

33.5

51.5

3 450

5 250

5 300

7 000

* 32909XU

T

B

C

rs min

30

72 72 72 72 72

20.75 20.75 28.75 28.75 28.75

19 19 27 27 27

15 14 23 23 23

1.5 1.5 1.5 1.5 1.5

32

58 65 75

17 26 29.75

17 26 28

13 20.5 23

35

55 62 62 72 72 72 72 72 80 80 80 80 80

14 18 21 18.25 24.25 24.25 24.25 28 22.75 22.75 22.75 32.75 32.75

14 18 21 17 23 23 23 28 21 21 21 31 31

40

62 68 68 75 80 80 80 85 90 90 90 90 90

15 19 22 26 19.75 24.75 32 33 25.25 25.25 25.25 35.25 35.25

45

68

15

r

1)Minimal allowable dimension for chamfer dimension r or r1. 2)This bearing does not incorporate the subunit dimensions. Note: When selecting bearings with bearing numbers marked with " * ", please consult NTN Engineering.

B-130

oil


● Tapered Roller Bearings

Sb

Sa

Equivalent radial load dynamic Pr=XFr+YFa Fa Fa ≦e Fr Fr >e X Y X Y 1 0 0.4 Y2 static Por=0.5Fr+YoFa

r1 a ra φDa φdb

φda φDb

When Por<Fr use Por=Fr

For values of e, Y2 and Yo see the table below.

Dimensions series to ISO

Abutment and fillet dimensions

Load Constant center mm

mm da

db

min

max

max

7FB 2FD 5FD

38.5 38.5 38.5 38.5 38.5

39.5 39 38 37 37

4CC 2DE 5FD

37.5 37.5 40.5

2BD 4CC 2CE 3DB 3DC 5DC

Mass kg

Db

Sa

Sb

ras

r1as

min

min

min

min

max

max

a

e

Y2

Yo

63.5 63.5 63.5 63.5 63.5

57 55 59 57 57

67 68 66 68 67.5

3 3 3 2 2

5.5 6.5 5.5 5.5 5.5

1.5 1.5 1.5 1.5 1.5

1.5 1.5 1.5 1.5 1.5

17.5 23.5 18.5 23 23

0.47 0.83 0.31 0.55 0.61

1.27 0.73 1.90 1.10 0.99

0.70 0.40 1.05 0.60 0.54

0.398 0.398 0.583 0.592 0.594

38 38 39

52.5 59.5 66.5

50 55 61

55 62 71

3 5 3

4 5.5 6.5

1 1 1.5

1 1 1.5

14.5 17 23

0.45 0.35 0.55

1.32 1.73 1.10

0.73 0.95 0.60

0.181 0.395 0.659

39.5 40.5 40.5 43.5 43.5 43.5 43.5 43.5 45 45 45 45 45

40 40 40.5 44 43 42 42 42 45 44 44 43 43

50.5 56.5 56.5 63.5 63.5 63.5 63.5 63.5 71.5 71.5 71.5 71.5 71.5

48 54 52 62 61 59 59 61 70 63.5 62 66 66

52.5 59 59 67 67 68 68 68 74 75.5 76.5 74 76

2.5 4 3 3 3 3 3 5 3 3 3 3 3

2.5 4 4 3 5 6 6 6 4.5 5.5 7.5 7.5 7.5

0.6 1 1 1.5 1.5 1.5 1.5 1.5 2 2 2 2 2

0.6 1 1 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5

10.5 15.5 14 15 17.5 21.5 20.5 18.5 17 20.5 26 20.5 25

0.29 0.45 0.31 0.37 0.37 0.58 0.55 0.35 0.31 0.55 0.83 0.31 0.55

2.06 1.32 1.97 1.60 1.60 1.03 1.10 1.70 1.90 1.10 0.73 1.90 1.10

1.13 0.73 1.08 0.88 0.88 0.57 0.60 0.93 1.05 0.60 0.40 1.05 0.60

0.121 0.224 0.263 0.344 0.457 0.461 0.461 0.531 0.540 0.517 0.530 0.787 0.797

7FB 2FD 5FD

44.5 45.5 45.5 48.5 48.5 48.5 48.5 52 50 50 50 50 50

45.5 46 46 47 49 48 47 48 52 50 50 50 48

57.5 62.5 62.5 66.5 71.5 71.5 71.5 75 81.5 80 81.5 81.5 81.5

54 60 60 65 69 68 67 70 77 72 71 73 72

58.5 65 64 71 75 75 76 80 82 85.5 86.5 82 84

3 4 2.5 4 3 3 5 5 3 3.5 3 3 3

3 4.5 4 5.5 3.5 5.5 7 5 5 6 8 8 8

0.6 1 1 1.5 1.5 1.5 1.5 2 2 2 2 2 2

0.6 1 1 1.5 1.5 1.5 1.5 2 1.5 1.5 1.5 1.5 1.5

11.5 15 15 18 16.5 19 21 22.5 19.5 23 29.5 23 27.5

0.29 0.38 0.28 0.36 0.37 0.37 0.36 0.34 0.35 0.55 0.83 0.35 0.55

2.07 1.58 2.12 1.69 1.60 1.60 1.68 1.74 1.74 1.10 0.73 1.74 1.10

1.14 0.87 1.17 0.93 0.88 0.88 0.92 0.96 0.96 0.60 0.40 0.96 0.60

0.161 0.273 0.312 0.494 0.435 0.558 0.728 0.907 0.769 0.728 0.738 1.08 1.1

2BC

50

50

63.5

59.5

64.5

3

3

0.6

0.6

12

0.32

1.88

1.04

0.188

2DE 2FB 7FB 2FE 5FE 2BC 3CD 2BE 2CE 3DB 3DC 2DE 2EE 2FB

Da

Axial load factors

B-131

(approx.)


● Tapered Roller Bearings Metric series T r1

C

r B φd

φD

a

d 45 ∼ 60mm Boundary dimensions

Basic load ratings dynamic static dynamic static kN kgf

mm d

D

rs min

1)

r

1) ls min

Limiting speeds

Bearing numbers

min-1

Cor

grease

5 850 6 750 8 650 6 900 8 350 10 900 11 300 9 800 15 700

7 800 9 550 11 700 8 000 10 200 14 400 12 800 11 100 19 500

4 800 4 800 4 700 4 400 4 400 4 400 4 000 3 500 4 000

6 400 6 400 6 200 5 900 5 900 5 900 5 300 4 600 5 300

4T-32009X 4T-33009 4T-33109 4T-30209 4T-32209 4T-33209 4T-30309 4T-30309D 32309U

57.0 50.5 88.0 103 121 93.0 109 158 190 132 152 130 232

3 650 3 200 6 400 7 100 8 850 7 850 8 900 11 700 15 400 10 900 13 500 11 600 18 700

5 800 5 150 9 000 10 500 12 400 9 450 11 100 16 100 19 400 13 500 15 500 13 300 23 600

4 700 4 700 4 400 4 400 4 200 4 000 4 000 4 000 3 800 3 400 3 600 3 200 3 600

6 300 6 300 5 800 5 800 5 600 5 300 5 300 5 300 5 100 4 500 4 800 4 200 4 800

* 32910XU 329102) 4T-32010X 4T-33010 4T-33110 4T-30210 4T-32210 4T-33210 4T-T2ED050 4T-T7FC050 4T-30310 4T-30310D 32310U

44.5 80.5 91.5 111 93.0 108 138 155 132 215

73.5 118 138 155 111 134 188 179 154 275

4 550 8 200 9 350 11 300 9 500 11 000 14 100 15 800 13 500 21 900

7 500 12 000 14 100 15 800 11 300 13 700 19 100 18 300 15 700 28 000

4 300 4 000 4 000 3 900 3 600 3 600 3 600 3 300 2 900 3 300

5 700 5 400 5 400 5 200 4 900 4 900 4 900 4 400 3 800 4 400

32911XU 4T-32011X 4T-33011 4T-33111 4T-30211 4T-32211 4T-33211 4T-30311 4T-30311D 32311U

51.0 82.0 93.5 113

83.0 123 145 164

5 200 8 350 9 550 11 600

8 450 12 500 14 700 16 700

4 000 3 700 3 700 3 600

5 300 4 900 4 900 4 700

32912XA2) 4T-32012X 4T-33012 4T-33112

T

B

C

Cr

Cor

45

75 75 80 85 85 85 100 100 100

20 24 26 20.75 24.75 32 27.25 27.25 38.25

20 24 26 19 23 32 25 25 36

15.5 19 20.5 16 19 25 22 18 30

1 1 1.5 1.5 1.5 1.5 2 2 2

1 1 1.5 1.5 1.5 1.5 1.5 1.5 1.5

57.5 66.0 84.5 67.5 82.0 107 111 96.0 154

76.5 93.5 115 78.5 100 141 126 109 191

50

72 72 80 80 85 90 90 90 100 105 110 110 110

15 15 20 24 26 21.75 24.75 32 36 32 29.25 29.25 42.25

15 14 20 24 26 20 23 32 35 29 27 27 40

12 12 15.5 19 20 17 19 24.5 30 22 23 19 33

0.6 0.6 1 1 1.5 1.5 1.5 1.5 2.5 3 2.5 2.5 2.5

0.6 0.6 1 1 1.5 1.5 1.5 1.5 2.5 3 2 2 2

35.5 31.5 62.5 69.5 86.5 77.0 87.5 115 151 107 133 113 184

55

80 90 90 95 100 100 100 120 120 120

17 23 27 30 22.75 26.75 35 31.5 31.5 45.5

17 23 27 30 21 25 35 29 29 43

14 17.5 21 23 18 21 27 25 21 35

1 1.5 1.5 1.5 2 2 2 2.5 2.5 2.5

1 1.5 1.5 1.5 1.5 1.5 1.5 2 2 2

60

85 95 95 100

17 23 27 30

17 23 27 30

14 17.5 21 23

1 1.5 1.5 1.5

1 1.5 1.5 1.5

1)Minimal allowable dimension for chamfer dimension r or r1. 2)This bearing does not incorporate the subunit dimensions.

B-132

Cr

oil


● Tapered Roller Bearings

Sb

Sa

Equivalent radial load dynamic Pr=XFr+YFa Fa Fa ≦e Fr Fr >e X Y X Y 1 0 0.4 Y2 static Por=0.5Fr+YoFa

r1 a ra φDa φdb

φda φDb

When Por<Fr use Por=Fr

For values of e, Y2 and Yo see the table below.

Dimensions series to ISO

Abutment and fillet dimensions

Load Constant center mm

mm da

db

Da

min

max

max

min

67 67 69 74 73 72 86 79 82

Axial load factors

Mass kg

Db

Sa

Sb

ras

r1as

min

min

min

max

max

a

e

Y2

Yo

72 71 77 80 81 81 93 96 93

4 4 4 3 3 5 3 3 3

4.5 5 5.5 4.5 5.5 7 5 9 8

1 1 1.5 1.5 1.5 1.5 2 2 2

1 1 1.5 1.5 1.5 1.5 1.5 1.5 1.5

16.5 16 19.5 18 20 22 21 32.5 25.5

0.39 0.29 0.38 0.40 0.40 0.39 0.35 0.83 0.35

1.53 2.04 1.57 1.48 1.48 1.56 1.74 0.73 1.74

0.84 1.12 0.86 0.81 0.81 0.86 0.96 0.40 0.96

0.346 0.398 0.542 0.495 0.607 0.783 1.01 0.958 1.46

(approx.)

3CC 2CE 3CE 3DB 3DC 3DE 2FB 7FB 2FD

50.5 50.5 53.5 53.5 53.5 53.5 55 55 55

51 51 52 54 53 52 59 56 56

69.5 69.5 71.5 76.5 76.5 76.5 91.5 91.5 91.5

2BC 3CC 2CE 3CE 3DB 3DC 3DE 2ED 7FC 2FB 7FB 2FD

54.5 54.5 55.5 55.5 58.5 58.5 58.5 58.5 62 64 62 62 62

55 55 56 56 56 58 58 57 59 60 65 62 62

67.5 67.5 74.5 74.5 76.5 81.5 81.5 81.5 88 91 100 100 100

63.5 63.5 72 72 74 79 78 77 84 78 95 87 90

69 69.5 77 76 82 85 85 87 94 100 102 105 102

3 3 4 4 4 3 3 5 6 4 3 3 3

3 3 4.5 5 6 4.5 5.5 7.5 6 10 6 10 9

0.6 0.6 1 1 1.5 1.5 1.5 1.5 2 2.5 2 2 2

0.6 0.6 1 1 1.5 1.5 1.5 1.5 2 2.5 2 2 2

13.5 14.5 17.5 17.5 20.5 19.5 21 23.5 25.5 36.5 23 35 28.5

0.34 0.36 0.42 0.32 0.41 0.42 0.42 0.41 0.34 0.87 0.35 0.83 0.35

1.76 1.67 1.42 1.90 1.46 1.43 1.43 1.45 1.75 0.69 1.74 0.73 1.74

0.97 0.92 0.78 1.04 0.80 0.79 0.79 0.80 0.96 0.38 0.96 0.40 0.96

0.191 0.192 0.366 0.433 0.58 0.563 0.648 0.852 1.31 1.23 1.31 1.25 1.92

2BC 3CC 2CE 3CE 3DB 3DC 3DE 2FB 7FB 2FD

60.5 63.5 63.5 63.5 65 65 65 67 67 67

60.5 63 63 62 64 63 62 71 68 68

74.5 81.5 81.5 86.5 91.5 91.5 91.5 110 110 110

70.5 81 81 83 88 87 85 104 94 99

76.5 86 86 91 94 95 96 111 113 111

3 4 5 5 4 4 6 4 4 4

3 5.5 6 7 4.5 5.5 8 6.5 10.5 10.5

1 1.5 1.5 1.5 2 2 2 2 2 2

1 1.5 1.5 1.5 1.5 1.5 1.5 2 2 2

14.5 20 19.5 22 21 22.5 25.5 24.5 38 30.5

0.31 0.41 0.31 0.37 0.40 0.40 0.40 0.35 0.83 0.35

1.94 1.48 1.92 1.60 1.48 1.48 1.50 1.74 0.73 1.74

1.07 0.81 1.06 0.88 0.81 0.81 0.83 0.96 0.40 0.96

0.274 0.563 0.643 0.846 0.74 0.876 1.15 1.66 1.59 2.44

4CC 2CE 3CE

65.5 68.5 68.5 68.5

65.5 67 67 67

79.5 86.5 86.5 91.5

76.5 85 85 88

82 91 90 96

3 4 5 5

3 5.5 6 7

1 1.5 1.5 1.5

1 1.5 1.5 1.5

15.5 21 20.5 23.5

0.33 0.43 0.33 0.40

1.80 1.39 1.83 1.51

0.99 0.77 1.01 0.83

0.296 0.576 0.684 0.912

Note: When selecting bearings with bearing numbers marked with " * ", please consult NTN Engineering.

B-133


● Tapered Roller Bearings Metric series T r1

C

r B φd

φD

a

d 60 ∼ 75mm Boundary dimensions

Basic load ratings dynamic static dynamic static kN kgf

mm d

D

T

B

C

rs min

1)

r

1) ls min

Cr

Cor

Cr

Limiting speeds

Bearing numbers

min-1

Cor

grease

oil

60

110 110 110 115 125 130 130 130

23.75 29.75 38 40 37 33.5 33.5 48.5

22 28 38 39 33.5 31 31 46

19 24 29 33 26 26 22 37

2 2 2 2.5 3 3 3 3

1.5 1.5 1.5 2.5 3 2.5 2.5 2.5

105 130 161 188 145 180 150 244

125 164 223 249 186 210 176 315

10 700 13 200 16 400 19 200 14 800 18 300 15 300 24 900

12 700 16 800 22 700 25 400 18 900 21 400 17 900 32 000

3 400 3 400 3 400 3 200 2 800 3 000 2 700 3 000

4 500 4 500 4 500 4 300 3 700 4 000 3 600 4 000

4T-30212 32212U 33212U 4T-T2EE060 4T-T7FC060 30312U 4T-30312D 32312U

65

90 100 100 110 120 120 120 140 140 140

17 23 27 34 24.75 32.75 41 36 36 51

17 23 27 34 23 31 41 33 33 48

14 17.5 21 26.5 20 27 32 28 23 39

1 1.5 1.5 1.5 2 2 2 3 3 3

1 1.5 1.5 1.5 1.5 1.5 1.5 2.5 2.5 2.5

48.5 83.0 97.5 144 123 159 195 203 173 273

85.0 128 156 211 148 206 265 238 204 350

4 900 8 450 9 950 14 700 12 500 16 200 19 900 20 700 17 700 27 800

8 700 13 000 16 000 21 500 15 000 21 000 27 100 24 300 20 900 36 000

3 700 3 400 3 400 3 300 3 100 3 100 3 100 2 800 2 500 2 800

4 900 4 600 4 600 4 400 4 200 4 200 4 200 3 700 3 300 3 700

32913XU 4T-32013X 4T-33013 4T-33113 4T-30213 32213U 33213U 30313U 4T-30313D 32313U

70

100 110 110 125 125 125 140 150 150 150

20 25 31 26.25 33.25 41 39 38 38 54

20 25 31 24 31 41 35.5 35 35 51

16 19 25.5 21 27 32 27 30 25 42

1 1.5 1.5 2 2 2 3 3 3 3

1 1.5 1.5 1.5 1.5 1.5 3 2.5 2.5 2.5

68.5 105 127 131 166 201 173 230 193 310

110 160 204 162 220 282 231 272 229 405

7 000 10 700 12 900 13 400 16 900 20 500 17 600 23 400 19 600 31 500

11 200 16 400 20 800 16 500 22 400 28 700 23 500 27 800 23 300 41 000

3 400 3 200 3 200 2 900 2 900 2 900 2 400 2 600 2 300 2 600

4 600 4 200 4 200 3 900 3 900 3 900 3 200 3 500 3 000 3 500

32914XU 4T-32014X 4T-33014 4T-30214 32214U 33214U 4T-T7FC070 30314U 4T-30314D 32314U

75

105 115 115 130 130 130 160 160

20 25 31 27.25 33.25 41 40 40

20 25 31 25 31 41 37 37

16 19 25.5 22 27 31 31 26

1 1.5 1.5 2 2 2 3 3

1 1.5 1.5 1.5 1.5 1.5 2.5 2.5

69.5 106 111 139 168 208 255 215

114 167 186 175 224 298 305 256

7 100 10 800 11 300 14 200 17 100 21 200 26 000 21 900

11 600 17 000 19 000 17 900 22 800 30 500 31 000 26 100

3 200 3 000 3 000 2 700 2 700 2 700 2 400 2 100

4 300 4 000 4 000 3 600 3 600 3 600 3 200 2 800

32915XU 32015XU 33015U 4T-30215 32215U 33215U 30315U 30315DU

1)Minimal allowable dimension for chamfer dimension r or r1.

B-134


● Tapered Roller Bearings

Sb

Sa

Equivalent radial load dynamic Pr=XFr+YFa Fa Fa ≦e Fr Fr >e X Y X Y 1 0 0.4 Y2 static Por=0.5Fr+YoFa

r1 a ra φDa φdb

φda φDb

When Por<Fr use Por=Fr

For values of e, Y2 and Yo see the table below.

Dimensions series to ISO

Abutment and fillet dimensions

Load Constant center mm

mm da

db

min

max

Da max

min

Axial load factors

Mass kg

Db

Sa

Sb

ras

r1as

min

min

min

max

max

a

e

Y2

Yo

(approx.)

3EB 3EC 3EE 2EE 7FC 2FB 7FB 2FD

70 70 70 72 74 74 74 74

70 69 69 70 72 77 73 74

101.5 101.5 101.5 103 111 118 118 118

96 95 93 98 94 112 103 107

103 104 105 109 119 120 124 120

4 4 6 6 4 4 4 4

4.5 5.5 9 7 11 7.5 11.5 11.5

2 2 2 2 2.5 2.5 2.5 2.5

1.5 1.5 1.5 2 2.5 2 2 2

22 25 27.5 28.5 42 26.5 40.5 32

0.40 0.40 0.40 0.33 0.82 0.35 0.83 0.35

1.48 1.48 1.48 1.80 0.73 1.74 0.73 1.74

0.81 0.81 0.82 0.99 0.40 0.96 0.40 0.96

0.949 1.18 1.55 1.86 2 2.06 1.97 3.02

2BC 4CC 2CE 3DE 3EB 3EC 3EE 2GB 7GB 2GD

70.5 73.5 73.5 73.5 75 75 75 79 79 79

70 72 72 73 77 75 74 83 79 80

84.5 91.5 91.5 101.5 111.5 111.5 111.5 128 128 128

80 90 89 96 106 104 102 122 111 117

86.5 97 96 106 113 115 115 130 133 130

3 4 5 6 4 4 7 4 4 4

3 5.5 6 7.5 4.5 5.5 9 8 13 12

1 1.5 1.5 1.5 2 2 2 2.5 2.5 2.5

1 1.5 1.5 1.5 1.5 1.5 1.5 2 2 2

16.5 22.5 21.5 26 23.5 27 29.5 28.5 44 34.5

0.35 0.46 0.35 0.39 0.40 0.40 0.39 0.35 0.83 0.35

1.70 1.31 1.72 1.55 1.48 1.48 1.54 1.74 0.73 1.74

0.93 0.72 0.95 0.85 0.81 0.81 0.85 0.96 0.40 0.96

0.315 0.63 0.732 1.28 1.18 1.58 1.98 2.55 2.42 3.66

2BC 4CC 2CE 3EB 3EC 3EE 7FC 2GB 7GB 2GD

75.5 78.5 78.5 80 80 80 84 84 84 84

75 78 79 81 80 79 82 89 84 86

94.5 101.5 101.5 116.5 116.5 116.5 126 138 138 138

90 98 99 110 108 107 106 130 118 125

96 105 105 118 119 120 135 140 142 140

4 5 5 4 4 7 5 4 4 4

4 6 5.5 5 6 9 12 8 13 12

1 1.5 1.5 2 2 2 2.5 2.5 2.5 2.5

1 1.5 1.5 1.5 1.5 1.5 2.5 2 2 2

18 24 22.5 25.5 28.5 31 47.5 30 47 36.5

0.32 0.43 0.28 0.42 0.42 0.41 0.87 0.35 0.83 0.35

1.90 1.38 2.11 1.43 1.43 1.47 0.69 1.74 0.73 1.74

1.05 0.76 1.16 0.79 0.79 0.81 0.38 0.96 0.40 0.96

0.487 0.848 1.07 1.26 1.68 2.1 2.61 3.06 2.92 4.46

2BC 4CC 2CE 4DB 4DC 3EE 2GB 7GB

80.5 83.5 83.5 85 85 85 89 89

80 83 85 85 85 83 95 91

99.5 106.5 106.5 121.5 121.5 121.5 148 148

94 103 101 115 114 111 139 127

101.5 110 110.5 124 125 125 149 151

4 5 6 4 4 7 4 6

4 6 5.5 5 6 10 9 14

1 1.5 1.5 2 2 2 2.5 2.5

1 1.5 1.5 1.5 1.5 1.5 2 2

19 25.5 23 27 30 32 32 50

0.33 0.46 0.30 0.44 0.44 0.43 0.35 0.83

1.80 1.31 2.01 1.38 1.38 1.40 1.74 0.73

0.99 0.72 1.11 0.76 0.76 0.77 0.96 0.40

0.511 0.909 1.11 1.41 1.74 2.2 3.57 3.47

B-135


● Tapered Roller Bearings Metric series T r1

C

r B φd

φD

a

d 75 ∼ 95mm Boundary dimensions

Basic load ratings dynamic static dynamic static kN kgf

mm d

D

T

B

C

rs min

1)

r

1) ls min

Cr

Cor

Cr

Limiting speeds

Bearing numbers

min-1

Cor

grease

oil

75

160

58

55

45

3

2.5

355

470

36 000

47 500

2 400

3 200

32315U

80

110 125 125 140 140 140 170 170 170

20 29 36 28.25 35.25 46 42.5 42.5 61.5

20 29 36 26 33 46 39 39 58

16 22 29.5 22 28 35 33 27 48

1 1.5 1.5 2.5 2.5 2.5 3 3 3

1 1.5 1.5 2 2 2 2.5 2.5 2.5

72.0 139 173 160 199 250 291 236 395

121 216 284 200 265 365 350 283 525

7 350 14 200 17 600 16 300 20 300 25 500 29 700 24 100 40 500

12 400 22 000 29 000 20 400 27 000 37 500 36 000 28 900 53 500

3 000 2 800 2 800 2 500 2 500 2 500 2 300 2 000 2 300

4 000 3 700 3 700 3 400 3 400 3 400 3 000 2 700 3 000

32916XU 32016XU 33016U 30216U 32216U 33216U 30316U 30316DU 32316U

85

120 130 130 150 150 150 180 180 180

23 29 36 30.5 38.5 49 44.5 44.5 63.5

23 29 36 28 36 49 41 41 60

18 22 29.5 24 30 37 34 28 49

1.5 1.5 1.5 2.5 2.5 2.5 4 4 4

1.5 1.5 1.5 2 2 2 3 3 3

94.0 142 176 183 224 284 305 247 405

157 224 296 232 300 420 365 293 525

9 600 14 400 18 000 18 600 22 900 29 000 31 000 25 200 41 000

16 100 22 900 30 000 23 600 30 500 43 000 37 000 29 900 53 500

2 800 2 600 2 600 2 400 2 400 2 400 2 100 1 900 2 100

3 800 3 500 3 500 3 200 3 200 3 200 2 900 2 500 2 900

32917XU 32017XU 33017U 30217U 32217U 33217U 30317U 30317DU 32317U

90

125 140 140 160 160 190 190 190

23 32 39 32.5 42.5 46.5 46.5 67.5

23 32 39 30 40 43 43 64

18 24 32.5 26 34 36 30 53

1.5 2 2 2.5 2.5 4 4 4

1.5 1.5 1.5 2 2 3 3 3

97.5 168 215 208 262 335 270 450

168 270 360 267 360 405 320 595

9 950 17 200 21 900 21 200 26 700 34 500 27 600 46 000

17 100 27 600 36 500 27 200 36 500 41 500 33 000 60 500

2 700 2 500 2 500 2 200 2 200 2 000 1 800 2 000

3 600 3 300 3 300 3 000 3 000 2 700 2 400 2 700

32918XU 32018XU 33018U 30218U 32218U 30318U 30318DU 32318U

95

130 145 145 170 170 200 200 200

23 32 39 34.5 45.5 49.5 49.5 49.5

23 32 39 32 43 45 45 45

18 24 32.5 27 37 38 38 32

1.5 2 2 3 3 4 3 4

1.5 1.5 1.5 2.5 2.5 3 3 3

101 171 219 226 299 365 315 296

178 280 375 290 415 445 365 355

10 300 17 500 22 400 23 000 30 500 37 500 32 500 30 000

18 200 28 600 38 000 29 600 42 500 45 500 37 500 36 500

2 500 2 300 2 300 2 100 2 100 1 900 1 900 1 700

3 400 3 100 3 100 2 800 2 800 2 500 2 500 2 200

32919XU 32019XU 33019U 30219U 32219U 30319U 303192) 30319DU

1)Minimal allowable dimension for chamfer dimension r or r1. 2)This bearing does not incorporate the subunit dimensions.

B-136


● Tapered Roller Bearings

Sb

Sa

Equivalent radial load dynamic Pr=XFr+YFa Fa Fa ≦e Fr Fr >e X Y X Y 1 0 0.4 Y2 static Por=0.5Fr+YoFa

r1 a ra φDa φdb

φda φDb

When Por<Fr use Por=Fr

For values of e, Y2 and Yo see the table below.

Dimensions series to ISO

Abutment and fillet dimensions

Load Constant center mm

mm da

db

min

max

2GD

89

2BC 3CC 2CE 3EB 3EC 3EE 2GB 7GB 2GD

85.5 88.5 88.5 92 92 92 94 94 94

2BC 4CC 2CE 3EB 3EC 3EE 2GB 7GB 2GD

max

min

Db

Sa

Sb

ras

r1as

min

min

min

max

max

a

Mass kg

e

Y2

Yo

(approx.)

148

133

149

4

13

2.5

2

39

0.35

1.74

0.96

5.35

85 89 89 91 90 89 102 97 98

104.5 116.5 116.5 130 130 130 158 158 158

99 112 112 124 122 119 148 134 142

106.5 120 119 132 134 135 159 159 159

4 6 6 4 4 7 4 6 4

4 7 6.5 6 7 11 9.5 15.5 13.5

1 1.5 1.5 2 2 2 2.5 2.5 2.5

1 1.5 1.5 2 2 2 2 2 2

20 27 25 27.5 31 35 34 53.5 41.5

0.35 0.42 0.28 0.42 0.42 0.43 0.35 0.83 0.35

1.71 1.42 2.16 1.43 1.43 1.41 1.74 0.73 1.74

0.94 0.78 1.19 0.79 0.79 0.78 0.96 0.40 0.96

0.54 1.28 1.6 1.72 2.18 2.92 4.41 4.11 6.41

93.5 93.5 93.5 97 97 97 103 103 103

92 94 94 97 96 95 107 103 102

111.5 121.5 121.5 140 140 140 166 166 166

111 117 118 132 130 128 156 143 150

115 125 125 141 142 144 167 169 167

4 6 6 5 5 7 5 6 5

5 7 6.5 6.5 8.5 12 10.5 16.5 14.5

1.5 1.5 1.5 2 2 2 3 3 3

1.5 1.5 1.5 2 2 2 2.5 2.5 2.5

21 28.5 26 30 33.5 37.5 35.5 56 43

0.33 0.44 0.29 0.42 0.42 0.42 0.35 0.83 0.35

1.83 1.36 2.06 1.43 1.43 1.43 1.74 0.73 1.74

1.01 0.75 1.13 0.79 0.79 0.79 0.96 0.40 0.96

0.773 1.35 1.7 2.14 2.75 3.58 5.2 4.85 7.15

2BC 3CC 2CE 3FB 3FC 2GB 7GB 2GD

98.5 100 100 102 102 108 108 108

96 100 100 103 102 113 109 108

116.5 131.5 131.5 150 150 176 176 176

112.5 125 127 140 138 165 151 157

120.5 134 135 150 152 177 179 177

4 6 7 5 5 5 6 5

5 8 6.5 6.5 8.5 10.5 16.5 14.5

1.5 2 2 2 2 3 3 3

1.5 1.5 1.5 2 2 2.5 2.5 2.5

22 30 28 32 36 37.5 59 45.5

0.34 0.42 0.27 0.42 0.42 0.35 0.83 0.35

1.75 1.42 2.23 1.43 1.43 1.74 0.73 1.74

0.96 0.78 1.23 0.79 0.79 0.96 0.40 0.96

0.817 1.79 2.18 2.66 3.49 6.03 5.66 8.57

2BC 4CC 2CE 3FB 3FC 2GB

103.5 105 105 109 109 113 113 113

101 105 104 110 108 118 118 114

121.5 136.5 136.5 158 158 186 186 186

117 130 131 149 145 172 172 154

125.5 140 139 159 161 186 186 187

4 6 7 5 5 5 5 6

5 8 6.5 7.5 8.5 11.5 11.5 17.5

1.5 2 2 2.5 2.5 3 3 3

1.5 1.5 1.5 2 2 2.5 2.5 2.5

23.5 31.5 28.5 34 39 40 40 62.5

0.36 0.44 0.28 0.42 0.42 0.35 0.35 0.83

1.68 1.36 2.16 1.43 1.43 1.74 1.73 0.73

0.92 0.75 1.19 0.79 0.79 0.96 0.95 0.40

0.851 1.83 2.27 3.07 4.3 6.98 6.58 6.47

7GB

91

Da

Axial load factors

Note: When selecting bearings with bearing numbers marked with " * ", please consult NTN Engineering.

B-137


● Tapered Roller Bearings Metric series T r1

C

r B φd

φD

a

d 95 ∼ 120mm Boundary dimensions

Basic load ratings dynamic static dynamic static kN kgf

mm d

1)

r

1) ls min

Limiting speeds

Bearing numbers

min-1

Cor

grease

51 500

68 500

1 900

2 500

32319U

206 162 153 281 390 335 465 500 400 435 770

12 300 9 950 10 900 17 300 22 800 26 300 33 500 41 500 35 000 36 000 58 500

21 000 16 500 15 600 28 600 39 500 34 500 47 500 51 000 40 500 44 000 78 500

2 400 2 400 1 800 2 200 2 200 2 000 2 000 1 800 1 800 1 800 1 800

3 200 3 200 2 400 3 000 3 000 2 700 2 700 2 400 2 400 2 400 2 400

* 32920XU 329202) 4T-T4CB100 32020XU 33020U 30220U 32220U 30320U 303202) 31320XU 32320U

126 201 245 287 380 435 365 380 610

219 335 420 380 540 530 420 470 825

12 800 20 500 25 000 29 300 38 500 44 500 37 000 39 000 62 500

22 400 34 000 43 000 38 500 55 500 54 500 43 000 47 500 84 500

2 300 2 100 2 100 1 900 1 900 1 700 1 700 1 700 1 700

3 000 2 800 2 800 2 500 2 500 2 300 2 300 2 300 2 300

32921XA2) 32021XU 33021U 30221U 32221U * 30321U 303212) * 31321XU 32321U

1.5 2 2 2.5 2.5 3 3 3 3 3

127 236 288 325 420 480 400 430 705 620

226 390 500 435 605 590 465 535 970 830

13 000 24 000 29 400 33 000 43 000 49 000 40 500 44 000 72 000 63 500

23 100 39 500 51 000 44 000 62 000 60 000 47 000 54 500 98 500 84 500

2 200 2 000 2 000 1 800 1 800 1 600 1 600 1 600 1 600 1 600

2 900 2 700 2 700 2 400 2 400 2 200 2 200 2 200 2 200 2 200

32922XA2) 32022XU 33022U 30222U 32222U * 30322U 303222) 31322XU * 32322U 323222)

1.5 1.5 2 2.5

162 118 245 345

294 205 420 470

16 500 12 000 25 000 35 500

30 000 20 900 43 000 48 000

2 000 2 000 1 800 1 700

2 600 2 600 2 500 2 200

* 32924XU 329242) 32024XU 30224U

D

T

B

C

rs min

Cr

Cor

95

200

71.5

67

55

4

3

505

670

100

140 140 145 150 150 180 180 215 215 215 215

25 25 24 32 39 37 49 51.5 51.5 56.5 77.5

25 24 22.5 32 39 34 46 47 47 51 73

20 20 17.5 24 32.5 29 39 39 39 35 60

1.5 1.5 3 2 2 3 3 4 3 4 4

1.5 1.5 3 1.5 1.5 2.5 2.5 3 3 3 3

121 97.5 107 170 224 258 330 410 345 355 570

105

145 160 160 190 190 225 225 225 225

25 35 43 39 53 53.5 53.5 58 81.5

25 35 43 36 50 49 49 53 77

20 26 34 30 43 41 41 36 63

1.5 2.5 2.5 3 3 4 3 4 4

1.5 2 2 2.5 2.5 3 3 3 3

110

150 170 170 200 200 240 240 240 240 240

25 38 47 41 56 54.5 54.5 63 84.5 84.5

25 38 47 38 53 50 50 57 80 80

20 29 37 32 46 42 42 38 65 65

1.5 2.5 2.5 3 3 4 3 4 4 3

120

165 165 180 215

29 29 38 43.5

29 27 38 40

23 23 29 34

1.5 1.5 2.5 3

1)Minimal allowable dimension for chamfer dimension r or r1. 2)This bearing does not incorporate the subunit dimensions.

B-138

Cr

oil


● Tapered Roller Bearings

Sb

Sa

Equivalent radial load dynamic Pr=XFr+YFa Fa Fa ≦e Fr Fr >e X Y X Y 1 0 0.4 Y2 static Por=0.5Fr+YoFa

r1 a ra φDa φdb

φda φDb

When Por<Fr use Por=Fr

For values of e, Y2 and Yo see the table below.

Dimensions series to ISO

Abutment and fillet dimensions

Load Constant center mm

mm da

db

min

max

Da max

min

Db

Sa

Sb

ras

r1as

min

min

min

max

max

a

Axial load factors

Mass kg

e

Y2

Yo

(approx.)

2GD

113

113

186

166

186

5

16.5

3

2.5

49

0.35

1.74

0.96

10.1

2CC

108.5 108.5 114 110 110 114 114 118 118 118 118

107.5 107.5 109 109 108 116 114 127 127 121 121

131.5 131.5 131 141.5 141.5 168 168 201 201 201 201

127.5 127.5 130 134 135 157 154 184 184 168 177

135.5 135.5 140 144 143 168 171 200 200 202 200

4 4 4 6 7 5 5 5 5 7 5

5 5 6.5 8 6.5 8 10 12.5 12.5 21.5 17.5

1.5 1.5 2.5 2 2 2.5 2.5 3 3 3 3

1.5 1.5 2.5 1.5 1.5 2 2 2.5 2.5 2.5 2.5

24.5 25 30 32.5 29.5 36 41.5 41.5 42 69 53

0.33 0.35 0.47 0.46 0.29 0.42 0.42 0.35 0.35 0.83 0.35

1.82 1.73 1.27 1.31 2.09 1.43 1.43 1.74 1.73 0.73 1.74

1.00 0.95 0.70 0.72 1.15 0.79 0.79 0.96 0.95 0.40 0.96

1.14 1.08 1.15 1.91 2.37 3.78 5.12 8.56 7.72 8.67 12.7

113.5 117 117 119 119 123 123 123 123

113.5 116 116 122 119 132 132 126 128

136.5 150 150 178 178 211 211 211 211

131.5 143 145 165 161 193 193 176 185

140.5 154 153 178 180 209 209 211 209

5 6 7 6 6 6 6 7 6

5 9 9 9 10 12.5 12.5 22 18.5

1.5 2 2 2.5 2.5 3 3 3 3

1.5 2 2 2 2 2.5 2.5 2.5 2.5

25 34.5 31 38 44 43.5 43.5 71.5 55

0.34 0.44 0.28 0.42 0.42 0.35 0.35 0.83 0.35

1.76 1.35 2.12 1.43 1.43 1.74 1.73 0.73 1.74

0.97 0.74 1.17 0.79 0.79 0.96 0.95 0.40 0.96

1.20 2.42 3.00 4.39 6.25 9.79 8.93 9.68 14.5

118.5 122 122 124 124 128 128 128 128 128

117.5 122 121 129 126 141 141 135 135 135

141.5 160 160 188 188 226 226 226 226 226

137 152 152 174 170 206 206 188 198 198

145.5 163 161 188 190 222 222 224 222 222

5 7 7 6 6 6 6 7 6 6.5

5 9 10 9 10 12.5 12.5 25 19.5 19.5

1.5 2 2 2.5 2.5 3 3 3 3 3

1.5 2 2 2 2 2.5 2.5 2.5 2.5 2.5

26.5 36.5 33.5 40 47 45.5 44 76 57.5 56

0.36 0.43 0.29 0.42 0.42 0.35 0.35 0.83 0.35 0.35

1.69 1.39 2.09 1.43 1.43 1.74 1.73 0.73 1.74 1.73

0.93 0.77 1.15 0.79 0.79 0.96 0.95 0.40 0.96 0.95

1.23 3.07 3.80 5.18 7.43 11.4 10.5 11.9 18.0 16.9

128.5 128.5 132 134

128.5 130.5 131 140

156.5 156.5 170 203

150 147.5 161 187

160 159.5 173 203

6 6 7 6

6 6 9 9.5

1.5 1.5 2 2.5

1.5 1.5 2 2

29.5 31 39 44

0.35 0.37 0.46 0.44

1.72 1.60 1.31 1.38

0.95 0.88 0.72 0.76

1.77 1.63 3.25 6.23

4CB 4CC 2CE 3FB 3FC 2GB 7GB 2GD

4DC 2DE 3FB 3FC 2GB 7GB 2GD

4DC 2DE 3FB 3FC 2GB 7GB 2GD

2CC 4DC 4FB

Note: When selecting bearings with bearing numbers marked with " * ", please consult NTN Engineering.

B-139


● Tapered Roller Bearings Metric series T r1

C

r B φd

φD

a

d 120 ∼ 170mm Boundary dimensions

Basic load ratings dynamic static dynamic static kN kgf

mm d

1)

r

1) ls min

D

T

B

C

rs min

Cr

Cor

120

215 260 260 260 260

61.5 59.5 59.5 68 90.5

58 55 55 62 86

50 46 46 42 69

3 4 3 4 4

2.5 3 3 3 3

460 560 465 515 815

680 695 550 655 1 130

130

180 180 200 230 230 280 280

32 32 45 43.75 67.75 63.75 72

32 30 45 40 64 58 66

25 26 34 34 54 49 44

2 2 2.5 4 4 5 5

1.5 2 2 3 3 4 4

194 142 320 375 530 650 600

140

190 210 250 250 250 300 300

32 45 45.75 45.75 71.75 67.75 77

32 45 42 42 68 62 70

25 34 36 36 58 53 47

2 2.5 4 3 4 5 5

1.5 2 3 3 3 4 4

150

210 225 270 270 320 320 320

38 48 49 77 72 72 82

38 48 45 73 65 65 75

30 36 38 60 55 55 50

2.5 3 4 4 5 4 5

160

220 240 290 290 340 340

38 51 52 84 75 75

38 51 48 80 68 68

30 38 40 67 58 58

170

230

38

38

30

Cr

Cor

Limiting speeds

Bearing numbers

min-1 grease

oil

47 000 69 500 57 000 71 000 47 500 56 000 52 500 67 000 83 000 116 000

1 700 1 500 1 500 1 500 1 500

2 200 2 000 2 000 2 000 2 000

350 252 545 505 815 830 780

19 800 14 500 32 500 38 000 54 000 66 000 61 500

36 000 25 700 55 500 51 500 83 000 84 500 79 500

1 800 1 800 1 700 1 500 1 500 1 400 1 400

2 400 * 32926XU 2 400 329262) 2 200 32026XU 2 000 30226U 2 000 32226U 1 800 30326U 1 800 31326XU

200 330 420 375 610 735 685

375 580 570 485 920 950 905

20 400 33 500 43 000 38 000 62 500 75 000 70 000

38 000 59 500 58 500 49 500 94 000 97 000 92 500

1 700 1 600 1 400 1 400 1 400 1 300 1 300

2 200 32928XU 2 100 32028XU 1 900 * 30228U 1 900 302282) 1 900 32228U 1 700 30328U 1 700 31328XU

2 2.5 3 3 4 4 4

268 370 450 700 825 680 775

490 655 605 1070 1070 875 1 030

27 300 50 000 37 500 67 000 46 000 61 500 71 500 109 000 84 000 109 000 69 500 89 000 79 000 105 000

1 600 1 400 1 300 1 300 1 200 1 200 1 200

2 100 32930XU 1 900 32030XU 1 700 30230U 1 700 32230U 1 600 * 30330U 1 600 303302) 1 600 31330XU

2.5 3 4 4 5 4

2 2.5 3 3 4 4

276 435 525 890 915 755

520 790 720 1 420 1 200 975

28 200 53 000 44 500 80 500 53 500 73 500 90 500 145 000 93 500 122 000 77 000 99 500

1 500 1 400 1 200 1 200 1 100 1 100

1 900 32932XU 1 800 32032XU 1 600 30232U 1 600 32232U 1 500 * 30332U 1 500 303322)

2.5

2

286

560

29 200

1 400

1 800

1)Minimal allowable dimension for chamfer dimension r or r1. 2)This bearing does not incorporate the subunit dimensions.

B-140

57 000

32224U 30324U 303242) 31324XU 32324U

32934XU


● Tapered Roller Bearings

Sb

Sa

Equivalent radial load dynamic Pr=XFr+YFa Fa Fa ≦e Fr Fr >e X Y X Y 1 0 0.4 Y2 static Por=0.5Fr+YoFa

r1 a ra φDa φdb

φda φDb

When Por<Fr use Por=Fr

For values of e, Y2 and Yo see the table below.

Dimensions series to ISO

4FD 2GB

Abutment and fillet dimensions

Load Constant center mm

mm da

db

min

max

Da max

min

Axial load factors

Mass kg

Db

Sa

Sb

ras

r1as

min

min

min

max

max

a

e

Y2

Yo

(approx.)

134 138 138 138 138

136 152 152 145 145

203 246 246 246 246

181 221 221 203 213

204 239 239 244 239

6 6 6 9 6

11.5 13.5 13.5 26 21.5

2.5 3 3 3 3

2 2.5 2.5 2.5 2.5

51.5 49 48.5 82.5 61.5

0.44 0.35 0.35 0.83 0.35

1.38 1.74 1.73 0.73 1.74

0.76 0.96 0.95 0.40 0.96

9.08 14.2 13.2 15.4 22.4

140 140 142 148 148 152 152

139 139 144 152 146 164 155.5

171.5 170 190 216 216 262 262

163.5 163.5 178 203 193 239 214.5

174 174 192 218 219 255 263

6 6 8 7 7 8 9

7 6 11 9.5 13.5 14.5 28

2 2 2 3 3 4 4

1.5 2 2 2.5 2.5 3 3

31.5 34 43.5 45.5 57 53.5 87.5

0.34 0.37 0.43 0.44 0.44 0.35 0.83

1.77 1.60 1.38 1.38 1.38 1.74 0.73

0.97 0.88 0.76 0.76 0.76 0.96 0.40

2.36 2.22 4.96 7.25 11.2 17.4 19

150 152 158 158 158 162 162

150 153 163 163 158 175.5 165

181.5 200 236 236 236 282 282

177 187 219 219 210 252 234

184 202 237 237 238 275.5 280

6 8 7 7 9 9 9

6 11 9.5 9.5 13.5 14.5 30

2 2 3 2.5 3 4 4

1.5 2 2.5 2.5 2.5 3 3

34 46 48.5 47.5 61 56.5 94

0.36 0.46 0.44 0.43 0.44 0.35 0.83

1.67 1.31 1.38 1.39 1.38 1.74 0.73

0.92 0.72 0.76 0.77 0.76 0.96 0.40

2.51 5.28 9.26 8.37 14.1 21.2 23

162 164 168 168 172 172 172

162 164 175 170 193 193 176

200 213 256 256 302 302 302

192 200 234 226 269 269 250

202 216 255 254 292 292 302

7 8 7 8 8 8 9

8 12 11 17 17 17 32

2 2.5 3 3 4 4 4

2 2 2.5 2.5 3 3 3

36.5 49.5 51.5 64.5 61 62.5 100.5

0.33 0.46 0.44 0.44 0.35 0.37 0.83

1.83 1.31 1.38 1.38 1.74 1.60 0.73

1.01 0.72 0.76 0.76 0.96 0.88 0.40

3.92 6.37 11.2 18.2 25.5 24.7 27.7

2DC 4EC 4GB 4GD 2GB

172 174 178 178 182 182

170.5 175 189 182 205 205

210 228 276 276 322 322

199 213 252 242 286 286

213.5 231 272 275 310 311

7 8 8 10 10 10

8 13 12 17 17 17

2 2.5 3 3 4 4

2 2 2.5 2.5 3 3

38.5 52.5 55.5 70 64 65.5

0.35 0.46 0.44 0.44 0.35 0.37

1.73 1.31 1.38 1.38 1.74 1.60

0.95 0.72 0.76 0.76 0.96 0.88

4.15 7.8 12.9 23.5 29.9 29.2

3DC

182

183

220

213

222

7

8

2

2

42.5

0.38

1.57

0.86

4.4

7GB 2GD 2CC 4EC 4FB 4FD 2GB 7GB 2CC 4DC 4FB 4FD 2GB 7GB 2DC 4EC 4GB 4GD 2GB 7GB

Note: When selecting bearings with bearing numbers marked with " * ", please consult NTN Engineering.

B-141


● Tapered Roller Bearings Metric series T r1

C

r B φd

φD

a

d 170 ∼ 300mm Boundary dimensions

Basic load ratings dynamic static dynamic static kN kgf

mm d

D

T

B

C

rs min

1)

r

1) ls min

Cr

Cor

Cr

Cor

Limiting speeds

Bearing numbers

min-1 grease

oil

170

260 310 310 360 360

57 57 91 80 80

57 52 86 72 72

43 43 71 62 62

3 5 5 5 4

2.5 4 4 4 4

500 610 1 000 1 010 845

895 845 1 600 1 320 1 100

51 000 91 000 62 000 86 500 102 000 163 000 103 000 135 000 86 000 113 000

1 300 1 100 1 100 1 000 1 000

1 700 32034XU 1 500 30234U 1 500 32234U 1 400 * 30334U 1 400 303342)

180

250 280 320 320

45 64 57 91

45 64 52 86

34 48 43 71

2.5 3 5 5

2 2.5 4 4

350 645 630 1 030

700 1 170 890 1 690

36 000 71 500 66 000 119 000 64 000 91 000 105 000 172 000

1 300 1 200 1 100 1 100

1 700 1 600 1 400 1 400

190

260 260 290 340 340 340

45 45 64 60 97 97

45 42 64 55 92 92

34 36 48 46 75 75

2.5 2.5 3 5 5 4

2 2.5 2.5 4 4 4

355 280 655 715 1 150 1 000

710 525 1 210 1 000 1 850 1 670

36 000 28 600 67 000 73 000 117 000 102 000

72 000 53 500 124 000 102 000 189 000 171 000

1 200 1 200 1 100 1 000 1 000 1 000

1 600 * 32938XU 1 600 329382) 1 500 32038XUE1 1 300 30238U 1 300 * 32238U 1 300 322382)

200

280 310 360 360

51 70 64 104

51 70 58 98

39 53 48 82

3 3 5 5

2.5 2.5 4 4

485 800 785 1 320

895 1 470 1 110 2 130

49 000 91 000 81 500 149 000 80 000 113 000 134 000 217 000

1 100 1 100 950 950

1 500 1 400 1 300 1 300

220

300 300 340

51 51 76

51 48 76

39 41 57

3 2.5 4

2.5 2.5 3

480 345 920

950 670 1 690

49 000 97 000 35 500 68 500 94 000 173 000

1 000 1 000 960

1 400 * 32944XUE1 1 400 32944E12) 1 300 32044XU

240

320 360

51 76

51 76

39 57

3 4

2.5 3

490 930

1 000 1 760

50 000 102 000 95 000 179 000

940 870

1 200 1 200

32948XUE1 32048XU

260

360 400

63.5 87

63.5 87

48 65

3 5

2.5 4

705 1 200

1 430 2 270

72 000 146 000 123 000 231 000

860 800

1 100 1 100

32952XUE1 32052XU

280

380 420

63.5 87

63.5 87

48 65

3 5

2.5 4

725 1 220

1 520 2 350

74 000 155 000 125 000 240 000

790 740

1 100 980

32956XUE1 32056XU

300

420 460

57 74

4 5

3 4

1 010 1 490

2 090 2 830

103 000 213 000 152 000 289 000

720 680

970 910

32960XUE1 32060XU

76 100

76 100

1)Minimal allowable dimension for chamfer dimension r or r1. 2)This bearing does not incorporate the subunit dimensions.

B-142

32936XU 32036XUE1 30236U 32236U

32940XUE1 32040XUE1 30240U 32240U


● Tapered Roller Bearings

Sb

Sa

Equivalent radial load dynamic Pr=XFr+YFa Fa Fa ≦e Fr Fr >e X Y X Y 1 0 0.4 Y2 static Por=0.5Fr+YoFa

r1 a ra φDa φdb

φda φDb

When Por<Fr use Por=Fr

For values of e, Y2 and Yo see the table below.

Dimensions series to ISO

Abutment and fillet dimensions

Load Constant center mm

mm da

db

min

max

Da max

min

Db

Sa

Sb

ras

r1as

min

min

min

max

max

Axial load factors

Mass kg

a

e

Y2

Yo

(approx.)

4EC 4GB 4GD 2GB

184 192 192 192 192

187 203 201 212.5 215.5

248 292 292 342 342

230 266 258 305 297

249 290.5 293 332.5 327

10 8 10 10 10

14 14 20 18 18

2.5 4 4 4 4

2 3 3 3 3

56 60.5 75 68 69.5

0.44 0.44 0.44 0.35 0.37

1.35 1.38 1.38 1.74 1.60

0.74 0.76 0.76 0.96 0.88

10.5 17 28.7 35.3 34.8

4DC 3FD 4GB 4GD

192 194 202 202

193 199 211 204

240 268 302 302

225 247 274 267

241 267 297 305

8 10 9 10

11 16 14 20

2 2.5 4 4

2 2 3 3

54 59.5 63 77.5

0.48 0.42 0.45 0.45

1.25 1.42 1.33 1.33

0.69 0.78 0.73 0.73

6.54 14.5 17.7 30.7

4DC

202 202 204 212 212 212

204 204 209 228 216 216

250 248 278 322 322 322

235 235 257 295 282 286

251 251 279 316 323 323

8 8 10 9 11 11

11 9 16 14 22 22

2 2 2.5 4 4 4

2 2 2 3 3 3

55 48.5 62.5 64 82 87.5

0.48 0.37 0.44 0.44 0.44 0.49

1.26 1.60 1.36 1.38 1.38 1.23

0.69 0.88 0.75 0.76 0.76 0.68

6.77 6.43 15.1 20.8 36.1 33.3

3EC 4FD 4GB 3GD

214 214 222 222

214 221 242 224.5

268 298 342 342

254 273 311 299

271 297 336 342.5

9 11 10 11

12 17 16 22

2.5 2.5 4 4

2 2 3 3

53.5 66.5 70 85

0.39 0.43 0.44 0.41

1.52 1.39 1.38 1.48

0.84 0.77 0.76 0.81

8.88 19.3 25.4 43.4

3EC 4FD

234 234 238

234 235 243

288 288 326

271 274 300

290 290 326

10 10 12

12 10 19

2.5 2.5 3

2 2 2.5

59.5 57 72.5

0.43 0.39 0.43

1.41 1.55 1.39

0.78 0.85 0.77

10.2 9.63 25

4EC 4FD

254 258

254 261

308 346

290 318

311 346

10 12

12 19

2.5 3

2 2.5

65.5 78

0.46 0.46

1.31 1.31

0.72 0.72

10.9 26.8

3EC 4FC

274 282

279 287

348 382

325 352

347 383

11 14

15 22

2.5 4

2 3

69.5 85.5

0.41 0.43

1.48 1.38

0.81 0.76

18.8 39.4

4EC 4FC

294 302

298 305

368 402

344 370

368 402

11 14

15 22

2.5 4

2 3

75 90.5

0.43 0.46

1.39 1.31

0.76 0.72

20 41.8

3FD 4GD

318 322

324 329

406 442

379 404

405 439

13 15

19 26

3 4

2.5 3

80 98

0.39 0.43

1.52 1.38

0.84 0.76

31.4 59.6

4FD 4GB 4GD

Note: When selecting bearings with bearing numbers marked with " * ", please consult NTN Engineering.

B-143


● Tapered Roller Bearings Metric series T r1

C

r B φd

φD

a

d 320 ∼ 360mm Boundary dimensions

Basic load ratings dynamic static dynamic static kN kgf

mm d

D

T

B

C

rs min

320

440 440 480

76 76 100

76 72 100

57 63 74

4 3 5

340

460 460

76 76

76 72

57 63

360

480

76

76

57

1)

r

1) ls min

min-1 grease

oil

Cor

3 3 4

1 010 865 1 520

2 150 1 880 2 940

103 000 88 000 155 000

219 000 192 000 300 000

670 670 630

900 900 840

* 32964XUE1 32964E12) 32064XU

4 3

3 3

1 040 910

2 270 1 980

106 000 93 000

232 000 201 000

630 630

840 900

* 32968XUE1 32968E12)

4

3

1 050

2 330

107 000

238 000

590

780

32972XUE1

B-144

Cor

Bearing numbers

Cr

1)Minimal allowable dimension for chamfer dimension r or r1. 2)This bearing does not incorporate the subunit dimensions.

Cr

Limiting speeds


● Tapered Roller Bearings

Sb

Sa

Equivalent radial load dynamic Pr=XFr+YFa Fa Fa ≦e Fr Fr >e X Y X Y 1 0 0.4 Y2 static Por=0.5Fr+YoFa

r1 a ra φDa φdb

φda φDb

When Por<Fr use Por=Fr

For values of e, Y2 and Yo see the table below.

Dimensions series to ISO

3FD

Abutment and fillet dimensions

Load Constant center mm

mm da

db

min

max

Da max

min

Db

Sa

Sb

ras

r1as

min

min

min

max

max

a

85 85 104

Axial load factors

Mass kg

e

Y2

Yo

0.42 0.39 0.46

1.44 1.55 1.31

0.79 0.85 0.72

33.1 31.7 60.2

(approx.)

338 338 342

344 344 344.5

426 426 462

398 398 418.5

426 425 463

13 13 15

19 13 26

3 3 4

2.5 2.5 3

4FD

358 358

362 362

446 446

417 414

446 445.5

13 13

19 13

3 3

2.5 2.5

90.5 87

0.44 0.39

1.37 1.55

0.75 0.85

34.9 36.0

4FD

378

381

466

436

466

13

19

3

2.5

96.5

0.46

1.31

0.72

36.6

4GD

Note: When selecting bearings with bearing numbers marked with " * ", please consult NTN Engineering.

B-145


● Tapered Roller Bearings Inch series T r1

C

r B φd

φD

a

d 12.700 ∼ 22.225mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm d

D

T

kN B

C

Limiting speeds static min-1

kgf

Cr

Cor

Cr

Cor

grease

oil

12.700

34.988

10.998

10.988

8.730

12.3

11.6

1 260

1 180

12 000

16 000

14.989

34.988

10.998

10.988

8.730

12.3

11.6

1 260

1 180

12 000

16 000

15.875

41.275 42.862 42.862 47.000 49.225

14.288 14.288 16.670 14.381 19.845

14.681 14.288 16.670 14.381 21.539

11.112 9.525 13.495 11.112 14.288

20.3 17.6 26.7 24.0 38.5

18.7 17.5 26.0 24.2 39.0

2 070 1 800 2 720 2 440 3 900

1 910 1 790 2 650 2 460 3 950

10 000 8 700 9 800 8 600 8 500

13 000 12 000 13 000 11 000 11 000

16.993

47.000

14.381

14.381

11.112

24.0

24.2

2 440

2 460

8 600

11 000

17.462

39.878

13.843

14.605

10.668

23.8

24.2

2 420

2 470

10 000

13 000

19.050

39.992 45.237 47.000 49.225 49.225 49.225 53.975 56.896

12.014 15.494 14.381 18.034 19.845 21.209 22.225 19.368

11.153 16.637 14.381 19.050 21.539 19.050 21.839 19.837

9.525 12.065 11.112 14.288 14.288 17.462 15.875 15.875

12.8 28.3 24.0 38.5 38.5 38.5 40.0 42.5

12.8 28.6 24.2 39.0 39.0 39.0 39.0 46.5

1 310 2 880 2 440 3 900 3 900 3 900 4 100 4 350

1 300 2 920 2 460 3 950 3 950 3 950 3 950 4 750

10 000 8 900 8 600 8 500 8 500 8 500 8 000 7 200

13 000 12 000 11 000 11 000 11 000 11 000 11 000 9 600

19.987

47.000

14.381

14.381

11.112

24.0

24.2

2 440

2 460

8 600

11 000

20.000

50.005

13.495

14.260

9.525

26.0

27.9

2 650

2 850

7 500

10 000

20.625

49.225

19.845

21.539

14.288

38.5

39.0

3 900

3 950

8 500

11 000

20.638

49.225

19.845

19.845

15.875

37.5

39.0

3 800

3 950

8 200

11 000

21.430

50.005

17.526

18.288

13.970

38.0

39.0

3 850

3 950

8 000

11 000

21.986

45.974

15.494

16.637

12.065

29.6

34.0

3 000

3 450

8 400

11 000

22.225

50.005 50.005 52.388 53.975

13.495 17.526 19.368 19.368

14.260 18.288 20.168 20.168

9.525 13.970 14.288 14.288

26.0 38.0 40.5 40.5

27.9 39.0 43.0 43.0

2 650 3 850 4 150 4 150

2 850 3 950 4 350 4 350

7 500 8 000 7 600 7 600

10 000 11 000 10 000 10 000

Note: 1. Chamfer dimensions on the back face of the inner and outer rings of the bearing are larger than maximum values for installation dimensions ras and r1as. 2. As for the maximum value for inner and outer ring diameters of bearings whose bearing numbers are marked with "†" (inner ring) and "††" (outer ring), the precision class is an integer for class 4 and class 2 bearings only. B-146


● Tapered Roller Bearings

r1a

Equivalent radial load dynamic Pr=XFr+YFa Fa Fa ≦e Fr Fr >e X Y X Y 1 0 0.4 Y2 static Por=0.5Fr+YoFa

ra φDa φdb

φda φDb

When Por<Fr use Por=Fr

For values of e, Y2 and Yo see the table below.

Bearing numbers

Abutment and fillet dimensions

Load Constant Axial center load factors mm

mm ras

r1as

da

db

Da

Db

max

max

a

4T-A4050/A4138

18.5

17

29

32

1.3

1.3

4T-A4059†/A4138

19.5

19

29

32

0.8

4T-03062/03162 4T-11590/11520 4T-17580/17520 4T-05062/05185 4T-09062/09195

21.5 24.5 23 23.5 22

20 22.5 21 21 21.5

34 34.5 36.5 40.5 42

37.5 39.5 39 42.5 44.5

4T-05066/05185

24.5

22

40.5

4T-LM11749/LM11710

23

21.5

4T-A6075/A6157 4T-LM11949/LM11910 4T-05075/05185 4T-09067/09195 4T-09078/09195 4T-09067/09196 4T-21075/21212†† 4T-1775/1729

24 28 25 25.5 25.5 25.5 31.5 27

4T-05079†/05185

Mass kg

e

Y2

Yo

(approx.)

2.5

0.45

1.32

0.73

0.053

1.3

2.5

0.45

1.32

0.73

0.049

1.3 1.5 1.5 1.5 0.8

2 1.5 1.5 1.3 1.3

5.4 1.2 5.8 4.2 9.4

0.31 0.70 0.33 0.36 0.27

1.93 0.85 1.81 1.68 2.26

1.06 0.47 1.00 0.92 1.24

0.092 0.103 0.122 0.131 0.203

42.5

1.5

1.3

4.2

0.36

1.68

0.92

0.127

34

37

1.3

1.3

5.3

0.29

2.10

1.15

0.084

23 23.5 23.5 24 24 24 26 25

34 39.5 40.5 42 42 41.5 43 49

37 41.5 42.5 44.5 44.5 44.5 50 51

1 1.3 1.3 1.3 1.3 1.3 1.5 1.5

1.3 1.3 1.3 1.3 1.3 1.5 2.3 1.3

1.5 5.6 4.2 7.6 9.4 7.6 5.6 6.5

0.53 0.30 0.36 0.27 0.27 0.27 0.59 0.31

1.14 2.00 1.68 2.26 2.26 2.26 1.02 1.95

0.63 1.10 0.92 1.24 1.24 1.24 0.56 1.07

0.065 0.122 0.121 0.179 0.188 0.198 0.248 0.272

26.5

24

40.5

42.5

1.5

1.3

4.2

0.36

1.68

0.92

0.117

4T-07079/07196

27.5

26

44.5

47

1.5

1

3.0

0.40

1.49

0.82

0.138

4T-09081/09195

27.5

25.5

42

44.5

1.5

1.3

9.4

0.27

2.26

1.24

0.179

4T-12580/12520

28.5

26

42.5

45.5

1.5

1.5

7.1

0.32

1.86

1.02

0.182

4T-M12649/M12610

29

25.5

44

46

1.3

1.3

6.4

0.28

2.16

1.19

0.169

4T-LM12749†/LM12711††

27.5

26

40

42.5

1.3

1.3

5.4

0.31

1.96

1.08

0.123

4T-07087/07196 4T-M12648/M12610 4T-1380/1328 4T-1380/1329††

28.5 28.5 29.5 29.5

27 26.5 27 27

44.5 44 45 46

47 46 48.5 49

1.3 1.3 1.5 1.5

1 1.3 1.5 1.5

3.0 6.4 7.4 7.4

0.40 0.28 0.29 0.29

1.49 2.16 2.05 2.05

0.82 1.19 1.13 1.13

0.13 0.165 0.2 0.215

備考 3.ET 円すいころ軸受も製作しております。NTN にご照会ください。

B-147


● Tapered Roller Bearings Inch series T r1

C

r B φd

φD

a

d 22.225 ∼ 28.575mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm d

D

T

kN

Limiting speeds static min-1

kgf

B

C

Cr

Cor

Cr

Cor

grease

oil

22.225

56.896 57.150

19.368 22.225

19.837 22.225

15.875 17.462

42.5 47.0

46.5 49.5

4 350 4 800

4 750 5 050

7 200 7 100

9 600 9 500

22.606

47.000

15.500

15.500

12.000

27.5

32.5

2 800

3 300

8 200

11 000

23.812

50.005 50.292 56.896

13.495 14.224 19.368

14.260 14.732 19.837

9.525 10.668 15.875

26.0 28.8 42.5

27.9 34.0 46.5

2 650 2 940 4 350

2 850 3 450 4 750

7 500 7 400 7 200

10 000 9 900 9 600

24.981

50.005

13.495

14.260

9.525

26.0

27.9

2 650

2 850

7 500

10 000

25.000

50.005

13.495

14.260

9.525

26.0

27.9

2 650

2 850

7 500

10 000

25.159

50.005

13.495

14.260

9.525

26.0

27.9

2 650

2 850

7 500

10 000

25.400

50.005 50.005 50.292 51.994 56.896 57.150 61.912 62.000 62.000 64.292 65.088 66.421

13.495 13.495 14.224 15.011 19.368 19.431 19.050 19.050 19.050 21.433 22.225 23.812

14.260 14.260 14.732 14.260 19.837 19.431 20.638 20.638 20.638 21.433 21.463 25.433

9.525 9.525 10.668 12.700 15.875 14.732 14.288 14.288 14.288 16.670 15.875 19.050

26.0 26.0 28.8 26.0 42.5 42.0 46.5 46.5 46.5 51.5 47.0 64.5

27.9 27.9 34.0 27.9 46.5 48.5 54.0 54.0 54.0 64.5 50.5 72.5

2 650 2 650 2 940 2 650 4 350 4 300 4 750 4 750 4 750 5 250 4 800 6 550

2 850 2 850 3 450 2 850 4 750 4 950 5 500 5 500 5 500 6 600 5 150 7 400

7 500 7 500 7 400 7 500 7 200 6 900 6 100 6 100 6 100 6 100 5 700 6 200

10 000 10 000 9 900 10 000 9 600 9 200 8 200 8 200 8 200 8 100 7 600 8 200

26.157

62.000

19.050

20.638

14.288

46.5

54.0

4 750

5 500

6 100

8 200

26.162

66.421

23.812

25.433

19.050

64.5

72.5

6 550

7 400

6 200

8 200

26.988

50.292 60.325 62.000 66.421

14.224 19.842 19.050 23.812

14.732 17.462 20.638 25.433

10.668 15.875 14.288 19.050

28.8 39.5 46.5 64.5

34.0 45.5 54.0 72.5

2 940 4 050 4 750 6 550

3 450 4 650 5 500 7 400

7 400 6 700 6 100 6 200

9 900 8 900 8 200 8 200

28.575

56.896 57.150

19.845 17.462

19.355 17.462

15.875 13.495

40.5 39.5

44.5 45.5

4 150 4 050

4 550 4 650

6 700 6 700

8 900 8 900

Note: 1. Chamfer dimensions on the back face of the inner and outer rings of the bearing are larger than maximum values for installation dimensions ras and r1as. 2. As for the maximum value for inner ring bore diameters of bearings whose bearing numbers are marked with "†" (inner ring), the precision class is an integer for class 4 and class 2 bearings only.

B-148


● Tapered Roller Bearings

r1a

Equivalent radial load dynamic Pr=XFr+YFa Fa Fa ≦e Fr Fr >e X Y X Y 1 0 0.4 Y2 static Por=0.5Fr+YoFa

ra φDa φdb

φda φDb

When Por<Fr use Por=Fr

For values of e, Y2 and Yo see the table below.

Bearing numbers

Abutment and fillet dimensions

Load Constant Axial center load factors mm

mm ras

r 1as

da

db

Da

Db

max

max

a

4T-1755/1729 4T-1280/1220

29 29.5

27.5 29

49 49

51 52

1.3 0.8

1.3 1.5

4T-LM72849/LM72810

30

28

40.5

44

1.5

4T-07093/07196 4T-L44640/L44610 4T-1779/1729

30.5 30.5 29.5

28.5 28.5 28.5

44.5 44.5 49

47 47 51

4T-07098/07196

31

29

44.5

4T-07097/07196

31

29

4T-07096/07196

31.5

4T-07100/07196 4T-07100S/07196 4T-L44643/L44610 4T-07100/07204 4T-1780/1729 4T-M84548/M84510 4T-15101/15243 4T-15100/15245 4T-15102/15245 4T-M86643/M86610 4T-23100/23256 4T-2687/2631

Mass kg

e

Y2

Yo

(approx.)

6.5 7.1

0.31 0.35

1.95 1.73

1.07 0.95

0.256 0.286

1

3.0

0.47

1.27

0.70

0.125

1.5 1.5 0.8

1 1.3 1.3

3.0 3.4 6.5

0.40 0.37 0.31

1.49 1.60 1.95

0.82 0.88 1.07

0.123 0.137 0.247

47

1.5

1

3.0

0.40

1.49

0.82

0.118

44.5

47

1.5

1

3.0

0.40

1.49

0.82

0.118

29.5

44.5

47

1.5

1

3.0

0.40

1.49

0.82

0.117

30.5 31.5 31.5 30.5 30.5 36 32.5 38 34 38 39 33.5

29.5 29.5 29.5 29.5 30 33 31.5 31.5 31.5 36.5 34.5 31.5

44.5 44.5 44.5 45 49 48.5 54 55 55 54 53 58

47 47 47 48 51 54 58 58 58 61 63 60

1 1.5 1.3 1 0.8 1.5 0.8 3.5 1.5 1.5 1.5 1.3

1 1 1.3 1.3 1.3 1.5 2 1.3 1.3 1.5 1.5 1.3

3.0 3.0 3.4 3.0 6.5 3.4 6.0 6.0 6.0 3.3 2.0 9.3

0.40 0.40 0.37 0.40 0.31 0.55 0.35 0.35 0.35 0.55 0.73 0.25

1.49 1.49 1.60 1.49 1.95 1.10 1.71 1.71 1.71 1.10 0.82 2.36

0.82 0.82 0.88 0.82 1.07 0.60 0.94 0.94 0.94 0.60 0.45 1.30

0.117 0.116 0.13 0.144 0.238 0.241 0.3 0.299 0.301 0.371 0.36 0.442

4T-15103/15245

33

32.5

55

58

0.8

1.3

6.0

0.35

1.71

0.94

0.296

4T-2682/2631

34.5

32

58

60

1.5

1.3

9.3

0.25

2.36

1.30

0.436

4T-L44649†/L44610 4T-15580†/15523 4T-15106†/15245 4T-2688†/2631

37.5 38.5 33.5 35

31 32 33 33

44.5 51 55 58

47 54 58 60

3.5 3.5 0.8 1.5

1.3 1.5 1.3 1.3

3.4 5.0 6.0 9.3

0.37 0.35 0.35 0.25

1.60 1.73 1.71 2.36

0.88 0.95 0.94 1.30

0.12 0.26 0.291 0.429

4T-1985/1930 4T-15590/15520

34 39.5

33.5 33.5

51 51

54 53

0.8 3.5

0.8 1.5

6.7 5.0

0.33 0.35

1.82 1.73

1.00 0.95

0.217 0.196

備考 3.ET 円すいころ軸受も製作しております。NTN にご照会ください。

B-149


● Tapered Roller Bearings Inch series J series T r1

C

r B φd

φD

a

d 28.575 ∼ 31.750mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm d

D

T

kN

Limiting speeds static min-1

kgf

B

C

Cr

Cor

Cr

Cor

grease

oil

28.575

58.738 60.325 60.325 62.000 64.292 66.421 68.262 68.262 69.850 72.626 73.025

19.050 19.842 19.845 19.050 21.433 23.812 22.225 22.225 23.812 24.608 22.225

19.355 17.462 19.355 20.638 21.433 25.433 22.225 23.812 25.357 24.257 22.225

15.080 15.875 15.875 14.288 16.670 19.050 17.462 17.462 19.050 17.462 17.462

40.5 39.5 40.5 46.5 51.5 64.5 57.0 57.5 69.0 58.0 56.5

44.5 45.5 44.5 54.0 64.5 72.5 67.0 65.5 81.5 55.5 68.0

4 150 4 050 4 150 4 750 5 250 6 550 5 800 5 850 7 050 5 900 5 750

4 550 4 650 4 550 5 500 6 600 7 400 6 850 6 700 8 300 5 700 6 900

6 700 6 700 6 700 6 100 6 100 6 200 5 800 5 700 5 700 5 800 5 300

8 900 8 900 8 900 8 200 8 100 8 200 7 700 7 700 7 600 7 700 7 000

29.000

50.292

14.224

14.732

10.668

28.0

35.5

2 860

3 600

7 200

9 600

29.367

66.421

23.812

25.433

19.050

64.5

72.5

6 550

7 400

6 200

8 200

29.987

62.000 62.000

16.002 19.050

16.566 20.638

14.288 14.288

39.0 46.5

42.0 54.0

3 950 4 750

4 300 5 500

6 300 6 100

8 400 8 200

30.000

69.012 72.000

19.845 29.370

19.583 27.783

15.875 23.020

48.5 72.0

58.0 97.0

4 900 7 350

5 900 9 850

5 600 5 400

7 400 7 100

30.112

62.000

19.050

20.638

14.288

46.5

54.0

4 750

5 500

6 100

8 200

30.162

62.000 64.292 69.850 72.626

16.002 21.433 23.812 30.162

16.566 21.433 25.357 29.997

14.288 16.670 19.050 23.812

39.0 51.5 69.0 84.5

42.0 64.5 81.5 98.0

3 950 5 250 7 050 8 600

4 300 6 600 8 300 9 950

6 300 6 100 5 700 5 500

8 400 8 100 7 600 7 300

30.213

62.000 62.000 62.000

19.050 19.050 19.050

20.638 20.638 20.638

14.288 14.288 14.288

46.5 46.5 46.5

54.0 54.0 54.0

4 750 4 750 4 750

5 500 5 500 5 500

6 100 6 100 6 100

8 200 8 200 8 200

30.226

69.012 69.012

19.845 19.845

19.583 19.583

15.875 15.875

48.5 48.5

58.0 58.0

4 900 4 900

5 900 5 900

5 600 5 600

7 400 7 400

31.750

59.131 62.000 62.000

15.875 18.161 19.050

16.764 19.050 20.638

11.811 14.288 14.288

34.5 46.5 46.5

41.0 54.0 54.0

3 500 4 750 4 750

4 150 5 500 5 500

6 300 6 100 6 100

8 400 8 200 8 200

Note: 1. Chamfer dimensions on the back face of the inner and outer rings of the bearing are larger than maximum values for installation dimensions ras and r1as. 2. As for the maximum value for inner ring bore diameters of bearings whose bearing numbers are marked with "†" (inner ring), the precision class is an integer for class 4 and class 2 bearings only.

B-150


● Tapered Roller Bearings

r1a

Equivalent radial load dynamic Pr=XFr+YFa Fa Fa >e ≦e Fr Fr X Y X Y 1 0 0.4 Y2 static Por=0.5Fr+YoFa

ra φDa φdb

φda φDb

ras 2.3 ras 5.6 min 3.56

15˚ min 4.75

Bearing numbers

When Por<Fr use Por=Fr

For values of e, Y2 and Yo see the table below.

Abutment and fillet dimensions

Load Constant Axial center load factors mm

mm ras

r 1as

da

db

Da

Db

max

max

a

4T-1985/1932 4T-15590/15523 4T-1985/1931 4T-15112/15245 4T-M86647/M86610 4T-2689/2631 4T-02474/02420 4T-2474/2420 4T-2578/2523 4T-41125/41286 4T-02872/02820

34 39.5 34 40 40 36 36.5 36 39 48 37.5

33.5 33.5 33.5 34 38 34 36 35 35 36.5 37

52 51 52 55 54 58 59 60 61 61 62

54 54 55 58 61 60 63 63 64 68 68

0.8 3.5 0.8 3.5 1.5 1.3 0.8 0.8 2.3 4.8 0.8

1.3 1.5 1.3 1.3 1.5 1.3 1.5 1.5 1.3 1.5 3.3

4T-L45449/L45410

39.5

33

44.5

48

3.5

4T-2690/2631

41

35

58

60

4T-17118†/17244 4T-15117†/15245

37 36.5

34.5 35

54 55

42.5 44.5

39.5 42.5

4T-15116/15245

36

4T-17119/17244 4T-M86649/M86610 4T-2558/2523 4T-3187/3120

Mass kg

e

Y2

Yo

(approx.)

5.9 5.0 5.9 6.0 3.3 9.3 5.2 6.5 9.1 3.7 3.9

0.33 0.35 0.33 0.35 0.55 0.25 0.42 0.34 0.27 0.60 0.45

1.82 1.73 1.82 1.71 1.10 2.36 1.44 1.77 2.19 1.00 1.32

1.00 0.95 1.00 0.94 0.60 1.30 0.79 0.97 1.21 0.55 0.73

0.23 0.25 0.255 0.277 0.348 0.416 0.409 0.41 0.483 0.477 0.48

1.3

3.5

0.37

1.62

0.89

0.113

3.5

1.3

9.3

0.25

2.36

1.30

0.406

57 58

1.5 1.3

1.5 1.3

3.3 6.0

0.38 0.35

1.57 1.71

0.86 0.94

0.228 0.269

60 58

63 69

3.5 1.3

1.3 3.3

4.1 6.0

0.38 0.55

1.57 1.10

0.86 0.60

0.369 0.619

35.5

55

58

0.8

1.3

6.0

0.35

1.71

0.94

0.268

37 41 40 39

34.5 38 36.5 38.5

54 54 61 61

57 61 64 67

1.5 1.5 2.3 0.8

1.5 1.5 1.3 3.3

3.3 3.3 9.1 9.9

0.38 0.55 0.27 0.33

1.57 1.10 2.19 1.80

0.86 0.60 1.21 0.99

0.226 0.336 0.468 0.621

4T-15118/15245 4T-15119/15245 4T-15120/15245

41.5 37.5 36

35.5 35.5 35.5

55 55 55

58 58 58

3.5 1.5 0.8

1.3 1.3 1.3

6.0 6.0 6.0

0.35 0.35 0.35

1.71 1.71 1.71

0.94 0.94 0.94

0.265 0.267 0.267

4T-14116/14274 4T-14116/14276

37 37

36.5 36.5

59 60

63 63

0.8 0.8

3.3 1.3

4.1 4.1

0.38 0.38

1.57 1.57

0.86 0.86

0.366 0.37

4T-LM67048/LM67010 4T-15123/15245 4T-15125/15245

42.5 42.5 42.5

36 36.5 36.5

52 55 55

56 58 58

* * 3.5

1.3 1.3 1.3

2.8 5.1 6.0

0.41 0.35 0.35

1.46 1.71 1.71

0.80 0.94 0.94

0.182 0.244 0.253

4T-14117A/14276 # 4T-JHM88540/JHM88513

Note: 3. Bearing numbers marked " # " designate J-series bearings. The tolerances of these bearings is listed in Table 6.6 on page A-42. 4. Chamfer dimensions of bearings marked " * " are shown in drawings.

B-151


● Tapered Roller Bearings Inch series J series T r1

C

r B φd

φD

a

d 31.750 ∼ 34.925mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm d

D

T

kN B

C

Cr

Limiting speeds static min-1

kgf Cor

Cr

Cor

grease

oil

31.750

62.000 66.421 68.262 68.262 69.012 69.012 69.850 69.850 72.626 72.626 73.025 73.025 73.025 73.812 76.200 79.375

19.050 25.400 22.225 22.225 19.845 19.845 23.812 23.812 30.162 30.162 22.225 22.225 29.370 29.370 29.370 29.370

20.638 25.357 22.225 22.225 19.583 19.583 25.357 25.357 29.997 29.997 22.225 23.812 27.783 27.783 28.575 29.771

14.288 20.638 17.462 17.462 15.875 15.875 19.050 19.050 23.812 23.812 17.462 17.462 23.020 23.020 23.020 23.812

46.5 69.0 57.0 57.0 48.5 48.5 69.0 69.0 84.5 84.5 56.5 62.5 72.0 72.0 78.0 93.0

54.0 81.5 67.0 67.0 58.0 58.0 81.5 81.5 98.0 98.0 68.0 75.5 97.0 97.0 105 114

4 750 7 050 5 800 5 800 4 900 4 900 7 050 7 050 8 600 8 600 5 750 6 400 7 350 7 350 7 950 9 450

5 500 8 300 6 850 6 850 5 900 5 900 8 300 8 300 9 950 9 950 6 900 7 700 9 850 9 850 10 700 11 600

6 100 5 700 5 800 5 800 5 600 5 600 5 700 5 700 5 500 5 500 5 300 5 200 5 400 5 400 5 100 4 900

8 200 7 600 7 700 7 700 7 400 7 400 7 600 7 600 7 300 7 300 7 000 7 000 7 100 7 100 6 800 6 600

33.338

68.262 69.012 69.850 72.626 73.025 76.200 76.200 76.200 79.375

22.225 19.845 23.812 30.162 29.370 23.812 29.370 29.370 25.400

22.225 19.583 25.357 29.997 27.783 25.654 28.575 28.575 24.074

17.462 15.875 19.050 23.812 23.020 19.050 23.020 23.020 17.462

56.5 48.5 69.0 84.5 72.0 73.0 78.0 78.0 65.5

71.0 58.0 81.5 98.0 97.0 90.5 105 105 67.0

5 750 4 900 7 050 8 600 7 350 7 450 7 950 7 950 6 650

7 250 5 900 8 300 9 950 9 850 9 200 10 700 10 700 6 800

5 700 5 600 5 700 5 500 5 400 5 100 5 100 5 100 5 200

7 500 7 400 7 600 7 300 7 100 6 800 6 800 6 800 6 900

34.925

65.088 65.088 69.012 72.233 72.238 73.025 73.025 73.025 73.025 73.025 73.025 76.200

18.034 18.034 19.845 25.400 20.638 22.225 22.225 22.225 23.812 23.812 23.812 23.812

18.288 18.288 19.583 25.400 20.638 22.225 22.225 23.812 24.608 24.608 25.654 25.654

13.970 13.970 15.875 19.842 15.875 17.462 17.462 17.462 19.050 19.050 19.050 19.050

46.5 46.5 48.5 65.0 48.0 56.5 56.5 62.5 71.0 71.0 73.0 73.0

56.0 56.0 58.0 84.5 58.5 68.0 68.0 75.5 85.0 85.0 90.5 90.5

4 750 4 750 4 900 6 600 4 900 5 750 5 750 6 400 7 200 7 200 7 450 7 450

5 700 5 700 5 900 8 600 5 950 6 900 6 900 7 700 8 700 8 700 9 200 9 200

5 700 5 700 5 600 5 400 5 300 5 300 5 300 5 200 5 300 5 300 5 100 5 100

7 600 7 600 7 400 7 200 7 000 7 000 7 000 7 000 7 100 7 100 6 800 6 800

Note: 1. Chamfer dimensions on the back face of the inner and outer rings of the bearing are larger than maximum values for installation dimensions ras and r1as. 2. Chamfer dimensions of bearings marked " * " are shown in drawings.

B-152


● Tapered Roller Bearings

r1a

Equivalent radial load dynamic Pr=XFr+YFa Fa Fa >e ≦e Fr Fr X Y X Y 1 0 0.4 Y2 static Por=0.5Fr+YoFa

ra φDa φdb

φda φDb

ras 2.3 ras 5.6 min 3.56

15˚ min 4.75

Bearing numbers

When Por<Fr use Por=Fr

For values of e, Y2 and Yo see the table below.

Abutment and fillet dimensions

Load Constant Axial center load factors mm

mm ras

r 1as

da

db

Da

Db

max

max

a

4T-15126/15245 4T-2580/2520 4T-02475/02420 4T-02476/02420 4T-14124/14276 4T-14125A/14276 4T-2580/2523 4T-2582/2523 4T-3188/3120 4T-3193/3120 4T-02875/02820 4T-2879/2820 4T-HM88542/HM88510 4T-HM88542/HM88512 4T-HM89440/HM89410 4T-3476/3420

37 38.5 44.5 39 38.5 44 38.5 44 40 45.5 45.5 39.5 45.5 45.5 45.5 43

36.5 37.5 38.5 38.5 37.5 37.5 37.5 37.5 39.5 39.5 39.5 38.5 42.5 42.5 44.5 41

55 57 59 59 60 60 61 61 61 61 62 63 59 60 62 67

58 62 63 63 63 63 64 64 67 67 68 68 70 70 73 74

0.8 0.8 3.5 0.8 0.8 3.5 0.8 3.5 0.8 3.5 3.5 0.8 1.3 1.3 0.8 1.3

1.3 3.3 1.5 1.5 1.3 1.3 1.3 1.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3

4T-M88048/M88010 4T-14130/14276 4T-2585/2523 4T-3196/3120 4T-HM88547/HM88510 4T-2785/2720 4T-HM89443/HM89410 4T-HM89444/HM89410 4T-43131/43312

42.5 45 45 47 45.5 46 46.5 53 51

41 38.5 39 40.5 42.5 40 44.5 44.5 42

58 60 61 61 59 66 62 62 67

65 63 64 67 70 70 73 73 74

0.8 3.5 3.5 3.5 0.8 3.5 0.8 3.8 3.5

4T-LM48548/LM48510 4T-LM48548A/LM48510 4T-14137A/14276 4T-HM88649/HM88610 4T-16137/16284 4T-02877/02820 4T-02878/02820 4T-2878/2820 4T-25877/25820 4T-25877/25821 4T-2793/2735X 4T-2793/2720

46 40.5 42 48.5 47 48.5 42.5 42 43 43 42 42

40 42 40 42.5 40.5 42 42 41 40.5 40.5 41 41

58 58 60 60 63 62 62 63 64 65 66 66

61 61 63 69 67 68 68 68 68 68 69 70

* 0.8 1.5 2.3 3.5 3.5 0.8 0.8 1.5 1.5 0.8 0.8

B-153

Mass kg

e

Y2

Yo

(approx.)

6.0 9.1 5.2 5.2 4.1 4.1 9.1 9.1 9.9 9.9 3.9 5.5 6.0 6.0 5.8 8.7

0.35 0.27 0.42 0.42 0.38 0.38 0.27 0.27 0.33 0.33 0.45 0.37 0.55 0.55 0.55 0.37

1.71 2.19 1.44 1.44 1.57 1.57 2.19 2.19 1.80 1.80 1.32 1.63 1.10 1.10 1.10 1.64

0.94 1.21 0.79 0.79 0.86 0.86 1.21 1.21 0.99 0.99 0.73 0.90 0.60 0.60 0.60 0.90

0.255 0.409 0.38 0.383 0.359 0.356 0.454 0.451 0.603 0.601 0.451 0.465 0.622 0.638 0.686 0.767

1.5 1.3 1.3 3.3 3.3 3.3 3.3 3.3 1.5

2.9 4.1 9.1 9.9 6.0 7.8 5.8 5.8 1.4

0.55 0.38 0.27 0.33 0.55 0.30 0.55 0.55 0.67

1.10 1.57 2.19 1.80 1.10 1.98 1.10 1.10 0.90

0.60 0.86 1.21 0.99 0.60 1.09 0.60 0.60 0.49

0.378 0.344 0.435 0.581 0.604 0.551 0.668 0.665 0.568

1.3 1.3 1.3 2.3 1.3 3.3 3.3 3.3 2.3 0.8 0.8 3.3

3.7 3.7 4.1 4.6 4.2 3.9 3.9 5.5 8.1 8.1 7.8 7.8

0.38 0.38 0.38 0.55 0.40 0.45 0.45 0.37 0.29 0.29 0.30 0.30

1.59 1.59 1.57 1.10 1.49 1.32 1.32 1.63 2.07 2.07 1.98 1.98

0.88 0.88 0.86 0.60 0.82 0.73 0.73 0.90 1.14 1.14 1.09 1.09

0.249 0.252 0.333 0.489 0.385 0.422 0.425 0.434 0.471 0.474 0.485 0.536


● Tapered Roller Bearings Inch series J series T r1

C

r B φd

φD

a

d 34.925 ∼ 38.100mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm d

D

T

kN B

C

Cr

Limiting speeds static min-1

kgf Cor

Cr

Cor

grease

oil

34.925

76.200 76.200 76.200 76.200 79.375 80.167 85.725

23.812 29.370 29.370 29.370 29.370 29.370 30.162

25.654 28.575 28.575 28.575 29.771 30.391 30.162

19.050 23.020 23.812 23.812 23.812 23.812 23.812

73.0 78.0 80.5 80.5 93.0 95.0 105

90.5 105 97.0 97.0 114 112 132

7 450 7 950 8 200 8 200 9 450 9 700 10 700

9 200 10 700 9 900 9 900 11 600 11 400 13 400

5 100 5 100 5 100 5 100 4 900 4 800 4 500

6 800 6 800 6 800 6 800 6 600 6 400 6 000

34.976

69.012

19.845

19.583

15.875

48.5

58.0

4 900

5 900

5 600

7 400

34.988

59.974 61.973 61.973

15.875 16.700 18.000

16.764 17.000 17.000

11.938 13.600 15.000

35.5 37.0 37.0

47.5 48.0 48.0

3 600 3 800 3 800

4 850 4 900 4 900

6 100 5 900 5 900

8 100 7 900 7 900

35.000

70.000 79.375 80.000

24.000 23.812 21.000

23.500 25.400 22.403

19.000 19.050 17.826

62.0 76.5 68.0

78.0 97.5 75.0

6 350 7 800 6 950

7 950 9 950 7 650

5 500 4 800 4 700

7 300 6 400 6 300

35.717

72.233 72.626

25.400 25.400

25.400 25.400

19.842 19.842

65.0 65.0

84.5 84.5

6 600 6 600

8 600 8 600

5 400 5 400

7 200 7 200

36.487

73.025 76.200

23.812 23.812

24.608 25.654

19.050 19.050

71.0 73.0

85.0 90.5

7 200 7 450

8 700 9 200

5 300 5 100

7 100 6 800

36.512

76.200 76.200 76.200 79.375 79.375 88.500

29.370 29.370 29.370 29.370 29.370 25.400

28.575 28.575 28.575 28.829 29.771 23.698

23.020 23.020 23.812 22.664 23.812 17.462

78.0 78.0 80.5 86.5 93.0 70.5

105 105 97.0 104 114 78.0

7 950 7 950 8 200 8 800 9 450 7 200

10 700 10 700 9 900 10 600 11 600 7 950

5 100 5 100 5 100 5 000 4 900 4 000

6 800 6 800 6 800 6 600 6 600 5 300

38.000

63.000

17.000

17.000

13.500

38.5

52.5

3 950

5 350

5 700

7 600

38.100

63.500 65.088 69.012 69.012 71.438 72.000

12.700 18.034 19.050 19.050 15.875 19.000

11.908 18.288 19.050 19.050 16.520 20.638

9.525 13.970 15.083 15.083 11.908 14.237

25.9 43.5 47.5 47.5 43.5 48.0

33.5 57.0 59.5 59.5 51.0 58.5

2 640 4 400 4 850 4 850 4 400 4 900

3 400 5 800 6 050 6 050 5 200 5 950

5 500 5 500 5 300 5 300 5 400 5 300

7 300 7 400 7 100 7 100 7 200 7 000

Note: 1. Chamfer dimensions on the back face of the inner and outer rings of the bearing are larger than maximum values for installation dimensions ras and r1as. 2. As for the maximum value for inner and outer ring diameters of bearings whose bearing numbers are marked with "†" (inner ring) and "††" (outer ring), the precision class is an integer for class 4 and class 2 bearings only.

B-154


● Tapered Roller Bearings

r1a

Equivalent radial load dynamic Pr=XFr+YFa Fa Fa >e ≦e Fr Fr X Y X Y 1 0 0.4 Y2 static Por=0.5Fr+YoFa

ra φDa φdb

φda φDb

ras 2.3 ras 5.6 min 3.56

15˚ min 4.75

Bearing numbers

When Por<Fr use Por=Fr

For values of e, Y2 and Yo see the table below.

Abutment and fillet dimensions

Load Constant Axial center load factors mm

mm ras

r 1as

Mass kg

da

db

Da

Db

max

max

a

e

Y2

Yo

(approx.)

4T-2793/2729 4T-HM89446/HM89410 4T-31593/31520 4T-31594/31520 4T-3478/3420 4T-3379/3320 4T-3872/3820

42 53 50 46 50 48 53

41 44.5 43.5 43.5 43.5 41.5 46

68 62 64 64 67 70 73

70 73 72 72 74 75 81

0.8 3.5 3.5 1.5 3.5 3.5 3.5

0.8 3.3 3.3 3.3 3.3 3.3 3.3

7.8 5.8 7.8 7.8 8.7 11.2 8.1

0.30 0.55 0.40 0.40 0.37 0.27 0.40

1.98 1.10 1.49 1.49 1.64 2.20 1.49

1.09 0.60 0.82 0.82 0.90 1.21 0.82

0.541 0.646 0.625 0.627 0.725 0.732 0.897

4T-14139/14276

41.5

40

60

63

1.3

1.3

4.1

0.38

1.57

0.86

0.333

4T-L68149†/L68111†† 4T-LM78349A†/LM78310A†† 4T-LM78349†/LM78310C††

45.5 42 46

39 39.5 40

53 54 56

56 59 59

* 1.5 *

1.3 1.5 1.5

2.5 2.4 2.4

0.42 0.44 0.44

1.44 1.35 1.35

0.79 0.74 0.74

0.179 0.209 0.218

47 42.5 42.5

42 42 41.5

60 71 73

67 74 75

2 0.8 0.8

1.5 0.8 1.3

3.6 7.4 6.6

0.55 0.32 0.27

1.10 1.88 2.20

0.60 1.04 1.21

0.42 0.61 0.534

4T-HM88648/HM88610 4T-HM88648/HM88611AS

52 52

43 43

60 59

69 69

3.5 3.5

2.3 3.3

4.6 3.0

0.55 0.55

1.10 1.10

0.60 0.60

0.478 0.482

4T-25880/25821 4T-2780/2720

44 44.5

42 42.5

65 66

68 70

1.5 1.5

0.8 3.3

8.1 7.8

0.29 0.30

2.07 1.98

1.14 1.09

0.457 0.518

4T-HM89448/HM89410 4T-HM89449/HM89411 4T-31597/31520 4T-HM89249/HM89210 4T-3479/3420 4T-44143/44348

48.5 54 51 55 45.5 54

44.5 44.5 44.5 44 44.5 50

62 65 64 66 67 75

73 73 72 75 74 84

0.8 3.5 3.5 3.5 0.8 2.3

3.3 0.8 3.3 3.3 3.3 1.5

5.8 5.8 7.8 5.8 8.7 –2.9

0.55 0.55 0.40 0.55 0.37 0.78

1.10 1.10 1.49 1.10 1.64 0.77

0.60 0.60 0.82 0.60 0.90 0.42

0.629 0.631 0.605 0.686 0.707 0.729

49

42.5

56

60

1.3

2.3

0.42

1.44

0.79

0.198

45 49 49.5 46.5 45 49.5

42.5 42.5 43 43 43 43

59 59 61 61 63 63

60 62 65 65 66 67

1.5 * 3.5 2 1.5 3.5

0.8 1.3 2.3 2.3 1 1.5

0.8 4.3 3.0 3.0 1.4 4.2

0.35 0.33 0.40 0.40 0.44 0.40

1.73 1.80 1.49 1.49 1.35 1.49

0.95 0.99 0.82 0.82 0.74 0.82

0.147 0.233 0.293 0.296 0.273 0.331

# 4T-JS3549A/JS3510 4T-26883/26822 4T-339/332

# 4T-JL69349/JL69310 4T-13889/13830 4T-LM29748/LM29710 4T-13685/13621 4T-13687/13621 4T-19150/19281 4T-16150/16282

Note: 3. Bearing numbers marked " # " designate J-series bearings. The tolerances of these bearings is listed in Table 6.6 on page A-42. 4. Chamfer dimensions of bearings marked " * " are shown in drawings.

B-155


● Tapered Roller Bearings Inch series T r1

C

r B φd

φD

a

d 38.100 ∼ 41.275mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm d

D

T

kN B

C

Cr

Limiting speeds static min-1

kgf Cor

Cr

Cor

grease

oil

38.100

76.200 76.200 76.200 79.375 79.375 80.000 80.035 82.550 82.931 85.725 87.312 88.500 88.500

20.638 23.812 23.812 23.812 29.370 21.006 24.608 29.370 23.812 30.162 30.162 25.400 26.988

20.940 25.654 25.654 25.400 29.771 20.940 23.698 28.575 25.400 30.162 30.886 23.698 29.083

15.507 19.050 19.050 19.050 23.812 15.875 18.512 23.020 19.050 23.812 23.812 17.462 22.225

55.5 73.0 73.0 76.5 93.0 55.5 67.0 87.0 76.0 105 94.0 70.5 95.5

63.0 90.5 90.5 97.5 114 63.0 82.5 117 98.0 132 117 78.0 107

5 650 7 450 7 450 7 800 9 450 5 650 6 850 8 850 7 750 10 700 9 600 7 200 9 750

6 450 9 200 9 200 9 950 11 600 6 450 8 400 11 900 10 000 13 400 12 000 7 950 10 900

5 000 5 100 5 100 4 800 4 900 5 000 4 800 4 700 4 500 4 500 4 400 4 000 4 600

6 700 6 800 6 800 6 400 6 600 6 700 6 400 6 200 6 000 6 000 5 900 5 300 6 100

39.688

76.200 77.534 79.375 80.035 80.167 88.500

23.812 29.370 23.812 29.370 29.370 25.400

25.654 30.391 25.400 30.391 30.391 23.698

19.050 23.812 19.050 23.812 23.812 17.462

73.0 95.0 76.5 95.0 95.0 70.5

90.5 112 97.5 112 112 78.0

7 450 9 700 7 800 9 700 9 700 7 200

9 200 11 400 9 950 11 400 11 400 7 950

5 100 4 800 4 800 4 800 4 800 4 000

6 800 6 400 6 400 6 400 6 400 5 300

40.000

76.200 80.000 85.000 88.500 107.950

20.638 21.000 20.638 26.988 36.512

20.940 22.403 21.692 29.083 36.957

15.507 17.826 17.462 22.225 28.575

55.5 68.0 69.5 95.5 141

63.0 75.0 79.5 107 177

5 650 6 950 7 100 9 750 14 400

6 450 7 650 8 100 10 900 18 100

5 000 4 700 4 400 4 600 3 600

6 700 6 300 5 800 6 100 4 800

40.483

82.550

29.370

28.575

23.020

87.0

8 850

11 900

4 700

6 200

40.988

67.975

17.500

18.000

13.500

46.0

62.5

4 700

6 400

5 300

7 000

41.275

73.025 73.431 73.431 76.200 76.200 76.200 79.375 80.000

16.667 19.558 21.430 18.009 22.225 25.400 23.812 18.009

17.462 19.812 19.812 17.384 23.020 25.400 25.400 17.384

12.700 14.732 16.604 14.288 17.462 20.638 19.050 14.288

46.0 56.0 56.0 42.5 65.0 76.5 76.5 42.5

55.5 69.5 69.5 51.5 80.5 97.5 97.5 51.5

4 700 5 700 5 700 4 350 6 600 7 800 7 800 4 350

5 700 7 100 7 100 5 250 8 200 9 950 9 950 5 250

5 000 5 000 5 000 4 900 4 900 4 800 4 800 4 900

6 600 6 600 6 600 6 500 6 500 6 400 6 400 6 500

117

Note: 1. Chamfer dimensions on the back face of the inner and outer rings of the bearing are larger than maximum values for installation dimensions ras and r1as. 2. As for the maximum value for inner and outer ring diameters of bearings whose bearing numbers are marked with "†" (inner ring) and "††" (outer ring), the precision class is an integer for class 4 and class 2 bearings only.

B-156


● Tapered Roller Bearings

r1a

Equivalent radial load dynamic Pr=XFr+YFa Fa Fa >e ≦e Fr Fr X Y X Y 1 0 0.4 Y2 static Por=0.5Fr+YoFa

ra φDa φdb

φda φDb

ras 2.3 ras 5.6 min 3.56

15˚ min 4.75

Bearing numbers

When Por<Fr use Por=Fr

For values of e, Y2 and Yo see the table below.

Abutment and fillet dimensions

Load Constant Axial center load factors mm

mm ras

r 1as

da

db

Da

Db

max

max

4T-28150/28300 4T-2776/2720 4T-2788/2720 4T-26878/26822 4T-3490/3420 4T-28150/28315 4T-27880/27820 4T-HM801346/HM801310 4T-25572/25520 4T-3875/3820 4T-3580/3525 4T-44150/44348 4T-418/414

45.5 52 50 45 52 45.5 48 51 46 49.5 48 55 51

43.5 43.5 43.5 44.5 45.5 43.5 47 49 46 48.5 45.5 51 44.5

68 66 66 71 67 69 68 68 74 73 75 75 77

71 70 70 74 74 73 75 78 77 81 81 84 80

1.5 4.3 3.5 0.8 3.5 1.5 0.8 0.8 0.8 0.8 1.5 2.3 3.5

1.3 3.3 3.3 0.8 3.3 1.5 1.5 3.3 0.8 3.3 3.3 1.5 1.5

4T-2789/2720 4T-3382/3321 4T-26880/26822 4T-3382/3339 4T-3386/3320 4T-44158/44348

52 52 48 52 46.5 58

45 45.5 45.5 45.5 45.5 51

66 68 71 71 70 75

70 75 74 75 75 84

3.5 3.5 1.5 3.5 0.8 3.5

4T-28158/28300 4T-344/332 4T-350A/354A 4T-420/414 4T-543/532X

47.5 52 47.5 52 57

45 45.5 46.5 46 50

68 73 77 77 94

71 75 80 80 100

4T-HM801349/HM801310

58

49

68

4T-LM300849†/LM300811††

52

45

4T-18590/18520 4T-LM501349/LM501310 4T-LM501349/LM501314 4T-11162/11300 4T-24780/24720 4T-26882/26823 4T-26885/26822 4T-11162/11315

53 53 53 49 54 54 48 49

46 46.5 46.5 46.5 47 47 47 46.5

kg

e

Y2

Yo

(approx.)

4.8 7.8 7.8 7.4 8.7 4.8 2.5 4.7 6.2 8.1 10.0 –2.91) 9.1

0.40 0.30 0.30 0.32 0.37 0.40 0.56 0.55 0.33 0.40 0.31 0.78 0.26

1.49 1.98 1.98 1.88 1.64 1.49 1.07 1.10 1.79 1.49 1.96 0.77 2.28

0.82 1.09 1.09 1.04 0.90 0.82 0.59 0.60 0.99 0.82 1.08 0.42 1.25

0.405 0.495 0.497 0.574 0.683 0.467 0.562 0.767 0.645 0.857 0.881 0.711 0.84

3.3 3.3 0.8 1.5 3.3 1.5

7.8 11.2 7.4 11.2 11.2 –2.91)

0.30 0.27 0.32 0.27 0.27 0.78

1.98 2.20 1.88 2.20 2.20 0.77

1.09 1.21 1.04 1.21 1.21 0.42

0.477 0.669 0.554 0.666 0.668 0.691

1.5 3.5 0.8 3.5 3.5

1.3 1.3 1.3 1.5 3.3

4.8 6.6 5.1 9.1 12.3

0.40 0.27 0.31 0.26 0.30

1.49 2.20 1.96 2.28 2.02

0.82 1.21 1.08 1.25 1.11

0.386 0.479 0.562 0.813 1.77

78

3.5

3.3

4.7

0.55

1.10

0.60

0.731

61

65

1.5

3.6

0.35

1.72

0.95

0.239

66 67 66 67 68 69 71 69

69 70 70 71 72 73 74 73

3.5 3.5 3.5 1.5 3.5 3.5 0.8 1.5

1.5 0.8 0.8 1.5 0.8 1.5 0.8 1.5

2.9 3.3 3.3 0.7 4.5 7.4 7.4 0.7

0.35 0.40 0.40 0.49 0.39 0.32 0.32 0.49

1.71 1.50 1.50 1.23 1.53 1.88 1.88 1.23

0.94 0.83 0.83 0.68 0.84 1.04 1.04 0.68

0.281 0.335 0.355 0.337 0.432 0.488 0.535 0.389

Note: 3. Chamfer dimensions of bearings marked " * " are shown in drawings. 1)"−" means that load center at outside on end of inner ring.

B-157

a

Mass


● Tapered Roller Bearings Inch series T r1

C

r B φd

φD

a

d 41.275 ∼ 44.450mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm d

D

T

kN B

C

Cr

Limiting speeds static min-1

kgf Cor

Cr

Cor

grease

oil

41.275

80.000 80.000 82.550 85.725 87.312 88.900 90.488 92.075 93.662 95.250 95.250 95.250

21.000 23.812 26.543 30.162 30.162 30.162 39.688 26.195 31.750 30.162 30.958 30.958

22.403 25.400 25.654 30.162 30.886 29.370 40.386 23.812 31.750 29.370 28.300 28.575

17.826 19.050 20.193 23.812 23.812 23.020 33.338 16.670 26.195 23.020 20.638 22.225

68.0 76.5 80.5 105 94.0 93.5 136 72.5 104 109 82.5 96.0

75.0 97.5 104 132 117 125 175 81.5 131 147 92.0 116

6 950 7 800 8 200 10 700 9 600 9 550 13 900 7 400 10 600 11 100 8 400 9 800

7 650 9 950 10 600 13 400 12 000 12 700 17 900 8 300 13 400 15 000 9 350 11 800

4 700 4 800 4 600 4 500 4 400 4 300 4 300 3 800 4 100 4 000 3 700 3 700

6 300 6 400 6 100 6 000 5 900 5 800 5 800 5 000 5 500 5 300 5 000 4 900

42.070

90.488

39.688

40.386

33.338

136

175

13 900

17 900

4 300

5 800

42.862

82.550 82.931 87.312

26.195 23.812 30.162

26.988 25.400 30.886

20.638 19.050 23.812

75.5 76.0 94.0

97.0 98.0 117

7 700 7 750 9 600

9 900 10 000 12 000

4 600 4 500 4 400

6 100 6 000 5 900

42.875

79.375 82.931

23.812 23.812

25.400 25.400

19.050 19.050

76.5 76.0

97.5 98.0

7 800 7 750

9 950 10 000

4 800 4 500

6 400 6 000

44.450

76.992 79.375 82.931 82.931 84.138 85.000 87.312 88.900 93.264 93.662 95.250 95.250 95.250 95.250 95.250 101.600 104.775

17.462 17.462 23.812 23.812 30.162 20.638 30.162 30.162 30.162 31.750 27.783 27.783 30.162 30.958 30.958 34.925 30.162

17.145 17.462 25.400 25.400 30.886 21.692 30.886 29.370 30.302 31.750 28.575 29.900 29.370 28.300 28.575 36.068 29.317

11.908 13.495 19.050 19.050 23.812 17.462 23.812 23.020 23.812 26.195 22.225 22.225 23.020 20.638 22.225 26.988 24.605

44.0 45.5 76.0 76.0 94.0 69.5 94.0 93.5 102 103 107 108 109 82.5 96.0 135 115

54.0 56.0 98.0 98.0 117 79.5 117 125 134 131 139 129 147 92.0 116 165 148

4 450 4 600 7 750 7 750 9 600 7 100 9 600 9 550 10 400 10 600 10 900 11 000 11 100 8 400 9 800 13 800 11 700

5 550 5 700 10 000 10 000 12 000 8 100 12 000 12 700 13 700 13 400 14 200 13 200 15 000 9 350 11 800 16 800 15 000

4 700 4 600 4 500 4 500 4 400 4 400 4 400 4 300 4 000 4 100 3 900 4 200 4 000 3 700 3 700 3 800 3 500

6 300 6 200 6 000 6 000 5 900 5 800 5 900 5 800 5 300 5 500 5 200 5 600 5 300 5 000 4 900 5 000 4 700

Note: 1. Chamfer dimensions on the back face of the inner and outer rings of the bearing are larger than maximum values for installation dimensions ras and r1as.

B-158


● Tapered Roller Bearings

r1a

Equivalent radial load dynamic Pr=XFr+YFa Fa Fa >e ≦e Fr Fr X Y X Y 1 0 0.4 Y2 static Por=0.5Fr+YoFa

ra φDa φdb

φda φDb

ras 2.3 ras 5.6 min 3.56

15˚ min 4.75

Bearing numbers

When Por<Fr use Por=Fr

For values of e, Y2 and Yo see the table below.

Abutment and fillet dimensions

Load Constant Axial center load factors mm

mm ras

r 1as

da

db

Da

Db

max

max

4T-336/332 4T-26882/26824 4T-M802048/M802011 4T-3880/3820 4T-3576/3525 4T-HM803145/HM803110 4T-4388/4335 4T-M903345/M903310 4T-46162/46368 4T-HM804840/HM804810 4T-53162/53375 4T-HM903245/HM903210

47 54 57 52 49 54 57 60 52 61 57 63

46 47 51 50 48 53 51 54 51 54 53 54

73 70 70 73 75 74 77 78 79 81 81 81

75 74 79 81 81 85 85 88 87 91 89 91

0.8 3.5 3.5 0.8 0.8 0.8 3.5 3.5 0.8 3.5 1.5 3.5

1.3 1.3 3.3 3.3 3.3 3.3 3.3 1.5 3.3 3.3 0.8 0.8

4T-4395/4335

58

51

77

85

3.5

4T-22780/22720 4T-25578/25520 4T-3579/3525

56 53 56

50 49.5 49.5

71 74 75

77 77 81

4T-26884/26822 4T-25577/25520

55 55

48.5 49

71 74

4T-12175/12303 4T-18685/18620 4T-25580/25520 4T-25582/25520 4T-3578/3520 4T-355/354A 4T-3578/3525 4T-HM803149/HM803110 4T-3782/3720 4T-46175/46368 4T-33885/33821 4T-438/432 4T-HM804842/HM804810 4T-53177/53375 4T-HM903249/HM903210 4T-527/522 4T-460/453X

52 54 57 60 57 54 57 62 58 55 53 57 57 63 65 59 60

49.5 49.5 50 50 51 50 51 53 52 54 53 51 57 53 54 53 54

68 71 74 74 74 77 75 74 82 79 85 83 81 81 81 89 92

kg

e

Y2

Yo

(approx.)

6.6 7.4 3.2 8.1 10.0 4.6 15.0 – 3.61) 7.1 3.7 0.5 – 0.41)

0.27 0.32 0.55 0.40 0.31 0.55 0.28 0.83 0.40 0.55 0.74 0.74

2.20 1.88 1.10 1.49 1.96 1.10 2.11 0.72 1.49 1.10 0.81 0.81

1.21 1.04 0.60 0.82 1.08 0.60 1.16 0.40 0.82 0.60 0.45 0.45

0.468 0.542 0.642 0.81 0.834 0.901 1.25 0.758 1.09 1.08 0.975 1.05

3.3

15.0

0.28

2.11

1.16

1.24

3.5 2.3 3.5

3.3 0.8 3.3

6.4 6.2 10.0

0.40 0.33 0.31

1.49 1.79 1.96

0.82 0.99 1.08

0.617 0.584 0.805

74 77

3.5 3.5

0.8 0.8

7.4 6.2

0.32 0.33

1.88 1.79

1.04 0.99

0.51 0.581

73 74 77 77 80 80 81 85 88 87 90 87 91 89 91 95 98

1.5 2.8 3.5 5 3.5 2.3 3.5 3.5 3.5 0.8 0.8 3.5 0.8 3.5 3.5 3.5 3.5

1.5 1.5 0.8 0.8 3.3 1.3 3.3 3.3 3.3 3.3 2.3 2.3 3.3 0.8 0.8 3.3 3.3

– 0.21) 2.2 6.2 6.2 10.0 5.1 10.0 4.6 8.3 7.1 8.0 9.2 3.7 0.5 – 0.41) 12.9 7.1

0.51 0.37 0.33 0.33 0.31 0.31 0.31 0.55 0.34 0.40 0.33 0.28 0.55 0.74 0.74 0.29 0.34

1.19 1.60 1.79 1.79 1.96 1.96 1.96 1.10 1.77 1.49 1.82 2.11 1.10 0.81 0.81 2.10 1.79

0.65 0.88 0.99 0.99 1.08 1.08 1.08 0.60 0.97 0.82 1.00 1.16 0.60 0.45 0.45 1.16 0.98

0.308 0.345 0.56 0.556 0.699 0.511 0.779 0.849 0.961 1.04 0.987 0.953 1.04 0.925 1 1.37 1.29

1)" − " means that load center at outside on end of inner ring.

B-159

a

Mass


● Tapered Roller Bearings Inch series T r1

C

r B φd

φD

a

d 44.450 ∼ 47.625mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm d

D

T

kN B

C

Cr

Limiting speeds static min-1

kgf Cor

Cr

Cor

grease

oil

44.450

104.775 104.775 111.125 111.125 127.000

30.162 36.512 30.162 30.162 50.800

30.958 36.512 26.909 26.909 52.388

23.812 28.575 20.638 20.638 41.275

130 138 104 104 250

169 189 136 136 320

13 200 14 000 10 600 10 600 25 500

17 300 19 300 13 900 13 900 33 000

3 500 3 600 3 200 3 200 3 200

4 700 4 800 4 200 4 200 4 300

44.983

82.931 93.264

23.812 30.162

25.400 30.302

19.050 23.812

76.0 102

98.0 134

7 750 10 400

10 000 13 700

4 500 4 000

6 000 5 300

45.000

85.000 88.900

20.638 20.638

21.692 22.225

17.462 16.513

69.5 76.5

79.5 90.5

7 100 7 800

8 100 9 250

4 400 4 100

5 800 5 500

45.237

87.312

30.162

30.886

23.812

94.0

9 600

12 000

4 400

5 900

45.242

73.431 77.788

19.558 19.842

19.812 19.842

15.748 15.080

54.0 57.5

76.0 73.5

5 550 5 850

7 750 7 500

4 800 4 600

6 400 6 200

45.618

82.550 82.931 83.058 85.000

23.812 23.812 23.876 23.812

25.400 25.400 25.400 25.400

19.050 19.050 19.114 19.050

76.0 76.0 76.0 76.0

98.0 98.0 98.0 98.0

7 750 7 750 7 750 7 750

10 000 10 000 10 000 10 000

4 500 4 500 4 500 4 500

6 000 6 000 6 000 6 000

45.987

74.976

18.000

18.000

14.000

51.0

71.0

5 200

7 250

4 700

6 300

46.038

79.375 82.931 85.000 85.000 90.119 93.264 95.250

17.462 23.812 20.638 25.400 23.000 30.162 27.783

17.462 25.400 21.692 25.608 21.692 30.302 29.900

13.495 19.050 17.462 20.638 21.808 23.812 22.225

45.5 76.0 69.5 79.0 69.5 102 108

56.0 98.0 79.5 104 79.5 134 129

4 600 7 750 7 100 8 050 7 100 10 400 11 000

5 700 10 000 8 100 10 600 8 100 13 700 13 200

4 600 4 500 4 400 4 400 4 400 4 000 4 200

6 200 6 000 5 800 5 800 5 800 5 300 5 600

47.625

88.900 88.900 93.264 95.250 96.838 101.600 104.775

20.638 25.400 30.162 30.162 21.000 34.925 30.162

22.225 25.400 30.302 29.370 21.946 36.068 29.317

16.513 19.050 23.812 23.020 15.875 26.988 24.605

76.5 82.0 102 109 78.0 135 115

90.5 101 134 147 96.5 165 148

7 800 8 350 10 400 11 100 7 950 13 800 11 700

9 250 10 300 13 700 15 000 9 850 16 800 15 000

4 100 4 200 4 000 4 000 3 700 3 800 3 500

5 500 5 600 5 300 5 300 5 000 5 000 4 700

117

Note: 1. Chamfer dimensions on the back face of the inner and outer rings of the bearing are larger than maximum values for installation dimensions ras and r1as. 2. As for the maximum value for inner and outer ring diameters of bearings whose bearing numbers are marked with "†" (inner ring) and "††" (outer ring), the precision class is an integer for class 4 and class 2 bearings only.

B-160


● Tapered Roller Bearings

r1a

Equivalent radial load dynamic Pr=XFr+YFa Fa Fa >e ≦e Fr Fr X Y X Y 1 0 0.4 Y2 static Por=0.5Fr+YoFa

ra φDa φdb

φda φDb

ras 2.3 ras 5.6 min 3.56

15˚ min 4.75

Bearing numbers

When Por<Fr use Por=Fr

For values of e, Y2 and Yo see the table below.

Abutment and fillet dimensions

Load Constant Axial center load factors mm

mm ras

r 1as

max

max

da

db

Da

Db

4T-45280/45220 4T-HM807040/HM807010 4T-55175C/55437 4T-55176C/55437 4T-6277/6220

55 66 70 65 67

54 59 64 65 60

93 89 92 92 108

99 100 105 105 117

0.8 3.5 3.5 0.8 3.5

3.3 3.3 3.3 3.3 3.3

4T-25584/25520 4T-3776/3720

53 59

51 53

74 82

77 88

1.5 3.5

4T-358/354A 4T-367/362A

53 55

50 51

77 81

80 84

4T-3586/3525

58

52

75

4T-LM102949/LM102910 4T-LM603049/LM603011

56 57

50 50

4T-25590/25519 4T-25590/25520 4T-25590/25522 4T-25590/25526

58 58 58 58

4T-LM503349A†/LM503310††

kg

e

Y2

Yo

7.9 7.4 –7.41) –7.41) 19.5

0.33 0.49 0.88 0.88 0.30

1.80 1.23 0.68 0.68 2.01

0.99 0.68 0.37 0.37 1.11

1.35 1.62 1.45 1.09 3.58

0.8 3.3

6.2 8.3

0.33 0.34

1.79 1.77

0.99 0.97

0.555 0.952

1.5 2

1.3 1.3

5.1 4.0

0.31 0.32

1.96 1.88

1.08 1.03

0.505 0.595

81

3.5

3.3

10.0

0.31

1.96

1.08

0.765

68 71

70 74

3.5 3.5

0.8 0.8

4.7 2.2

0.31 0.43

1.97 1.41

1.08 0.77

0.307 0.372

51 51 51 51

73 74 73 74

77 77 77 78

3.5 3.5 3.5 3.5

2 0.8 2 2.3

6.2 6.2 6.2 6.2

0.33 0.33 0.33 0.33

1.79 1.79 1.79 1.79

0.99 0.99 0.99 0.99

0.534 0.543 0.545 0.581

57

51

67

71

1.5

1.9

0.40

1.49

0.82

0.296

4T-18690/18620 4T-25592/25520 4T-359A/354A 4T-2984/2924 4T-359S/352 4T-3777/3720 4T-436/432

56 58 57 58 55 60 59

51 52 51 52 51 53 52

71 74 77 76 78 82 83

74 77 80 80 82 88 87

2.8 3.5 3.5 3.5 2.3 3.5 3.5

1.5 0.8 1.3 1.3 2.3 3.3 2.3

2.2 6.2 5.1 6.4 5.1 8.3 9.2

0.37 0.33 0.31 0.35 0.31 0.34 0.28

1.60 1.79 1.96 1.73 1.96 1.77 2.11

0.88 0.99 1.08 0.95 1.08 0.97 1.16

0.329 0.538 0.489 0.615 0.651 0.934 0.927

4T-369A/362A 4T-M804048/M804010 4T-3778/3720 4T-HM804846/HM804810 4T-386A/382A 4T-528/522 4T-463/453X

60 57 67 66 56 62 65

53 56 55 57 55 55 56

81 77 82 81 89 89 92

84 85 88 91 92 95 98

3.5 0.8 6.4 3.5 0.8 3.5 4.8

1.3 3.3 3.3 3.3 0.8 3.3 3.3

4.0 1.7 8.3 3.7 3.1 12.9 7.1

0.32 0.55 0.34 0.55 0.35 0.29 0.34

1.88 1.10 1.77 1.10 1.69 2.10 1.79

1.03 0.60 0.97 0.60 0.93 1.16 0.98

0.559 0.662 0.898 0.978 0.72 1.3 1.24

Note: 3. Chamfer dimensions of bearings marked " * " are shown in drawings. 1)"−" means that load center at outside on end of inner ring.

B-161

a

Mass

(approx.)


● Tapered Roller Bearings Inch series J series T r1

C

r B φd

φD

a

d 47.625 ∼ 50.800mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm d

D

T

kN B

C

Cr

Limiting speeds static min-1

kgf Cor

Cr

Cor

grease

oil

47.625

104.775 111.125 123.825

30.162 30.162 36.512

30.958 26.909 32.791

23.812 20.638 25.400

130 104 154

169 136 188

13 200 10 600 15 700

17 300 13 900 19 200

3 500 3 200 2 900

4 700 4 200 3 900

48.412

95.250 95.250

30.162 30.162

29.370 29.370

23.020 23.020

109 109

147 147

11 100 11 100

15 000 15 000

4 000 4 000

5 300 5 300

49.212

93.264 103.188 104.775 114.300 114.300

30.162 43.658 36.512 44.450 44.450

30.302 44.475 36.512 44.450 44.450

23.812 36.512 28.575 34.925 36.068

102 174 138 186 203

134 232 189 225 261

10 400 17 700 14 000 19 000 20 700

13 700 23 600 19 300 23 000 26 600

4 000 3 800 3 600 3 600 3 500

5 300 5 000 4 800 4 800 4 700

49.987

82.550 92.075 114.300

21.590 24.608 44.450

22.225 25.400 44.450

16.510 19.845 36.068

69.5 83.5 203

94.0 116 261

7 100 8 550 20 700

9 600 11 800 26 600

4 300 4 000 3 500

5 700 5 300 4 700

50.000

82.000 84.000 88.900 88.900 90.000 105.000 110.000

21.500 22.000 20.638 20.638 28.000 37.000 22.000

21.500 22.000 22.225 22.225 28.000 36.000 21.996

17.000 17.500 16.513 16.513 23.000 29.000 18.824

69.5 69.5 76.5 76.5 106 138 89.5

94.0 94.5 90.5 90.5 141 189 120

7 100 7 100 7 800 7 800 10 800 14 000 9 150

9 600 9 600 9 250 9 250 14 400 19 300 12 300

4 300 4 300 4 100 4 100 4 100 3 600 3 200

5 700 5 700 5 500 5 500 5 400 4 800 4 300

50.800

82.550 85.000 88.900 88.900 88.900 90.000 92.075 93.264 93.264 95.250 95.250 96.838 97.630 98.425

21.590 17.462 17.462 20.638 20.638 20.000 24.608 30.162 30.162 27.783 30.162 21.000 24.608 30.162

22.225 17.462 17.462 22.225 22.225 22.225 25.400 30.302 30.302 28.575 30.302 21.946 24.608 30.302

16.510 13.495 13.495 16.513 16.513 15.875 19.845 23.812 23.812 22.225 23.812 15.875 19.446 23.812

69.5 49.5 49.5 76.5 76.5 76.5 83.5 102 102 107 102 78.0 88.5 102

94.0 65.0 65.0 90.5 90.5 90.5 116 134 134 139 134 96.5 128 134

7 100 5 050 5 050 7 800 7 800 7 800 8 550 10 400 10 400 10 900 10 400 7 950 9 000 10 400

9 600 6 600 6 600 9 250 9 250 9 250 11 800 13 700 13 700 14 200 13 700 9 850 13 000 13 700

4 300 4 200 4 200 4 100 4 100 4 100 4 000 4 000 4 000 3 900 4 000 3 700 3 700 4 000

5 700 5 600 5 600 5 500 5 500 5 500 5 300 5 300 5 300 5 200 5 300 5 000 4 900 5 300

Note: 1. Chamfer dimensions on the back face of the inner and outer rings of the bearing are larger than maximum values for installation dimensions ras and r1as. 2. As for the maximum value for inner ring bore diameters of bearings whose bearing numbers are marked with "†" (inner ring), the precision class is an integer for class 4 and class 2 bearings only.

B-162


● Tapered Roller Bearings

r1a

Equivalent radial load dynamic Pr=XFr+YFa Fa Fa ≦e Fr Fr >e X Y X Y 1 0 0.4 Y2 static Por=0.5Fr+YoFa

ra φDa φdb

φda φDb

When Por<Fr use Por=Fr

For values of e, Y2 and Yo see the table below.

Bearing numbers

Abutment and fillet dimensions

Load Constant Axial center load factors mm

mm ras

r 1as

max

max

da

db

Da

Db

4T-45282/45220 4T-55187C/55437 4T-72188C/72487

63 69 69

57 62 67

93 92 102

99 105 116

3.5 3.5 0.8

3.3 3.3 3.3

4T-HM804848/HM804810 4T-HM804849/HM804810

63 66

57 57

81 81

91 91

2.3 3.5

3.3 3.3

3.7 3.7

4T-3781/3720 4T-5395/5335 4T-HM807044/HM807010 4T-65390/65320 4T-HH506348/HH506310

62 66 69 70 71

56 60 63 60 61

82 89 89 97 97

88 97 100 107 107

3.5 3.5 3.5 3.5 3.5

3.3 3.3 3.3 3.3 3.3

4T-LM104947A†/LM104911 4T-28579†/28521 4T-HH506349†/HH506310

55 60 72

55 56 61

75 83 97

78 87 107

0.5 2.3 3.5

# 4T-JLM104948/JLM104910 # 4T-JLM704649/JLM704610 4T-365/362A 4T-366/362A # 4T-JM205149/JM205110 # 4T-JHM807045/JHM807012 4T-396/394A

60 62 58 59 62 69 61

55 56 55 55 57 63 60

76 76 81 81 80 90 101

78 80 84 84 85 100 104

62 62 62 58 65 62 63 58 64 64 64 61 65 64

55 56 56 56 56 56 57 58 58 58 58 60 58 58

75 77 78 81 81 81 83 82 82 85 83 89 88 84

78 80 82 84 84 84 87 88 88 90 89 92 92 90

4T-LM104949/LM104911 4T-18790/18720 4T-18790/18724 4T-368/362A 4T-370A/362A 4T-368A/362 4T-28580/28521 4T-3775/3720 4T-3780/3720 4T-33889/33821 4T-3780/3726 4T-385A/382A 4T-28678/28622 4T-3780/3732

a

e

kg

Y2

Yo

1.80 0.68 0.81

0.99 0.37 0.45

1.29 1.4 2.16

0.55 0.55

1.10 1.10

0.60 0.60

0.967 0.964

8.3 16.1 7.4 12.5 13.3

0.34 0.30 0.49 0.43 0.40

1.77 2.02 1.23 1.39 1.49

0.97 1.11 0.68 0.77 0.82

0.877 1.75 1.52 2.23 2.33

1.3 0.8 3.3

5.8 4.6 13.3

0.31 0.38 0.40

1.97 1.59 1.49

1.08 0.87 0.82

0.434 0.718 2.27

3 3.5 2 2.3 3 3 0.8

0.5 1.5 1.3 1.3 2.5 2.5 1.3

5.4 2.3 4.0 4.0 7.4 7.5 0.7

0.31 0.44 0.32 0.32 0.33 0.49 0.40

1.97 1.37 1.88 1.88 1.82 1.23 1.49

1.08 0.75 1.03 1.03 1.00 0.68 0.82

0.42 0.466 0.53 0.529 0.752 1.52 1.06

3.5 3.5 3.5 1.5 5 3.5 3.5 0.8 3.5 3.5 3.5 2.3 3.5 3.5

1.3 1.5 1.3 1.3 1.3 2 0.8 3.3 3.3 2.3 3.3 0.8 0.8 3.3

5.8 0.8 0.8 4.0 4.0 4.0 4.6 8.3 8.3 8.0 8.3 3.1 3.3 8.3

0.31 0.41 0.41 0.32 0.32 0.32 0.38 0.34 0.34 0.33 0.34 0.35 0.40 0.34

1.97 1.48 1.48 1.88 1.88 1.88 1.59 1.77 1.77 1.82 1.77 1.69 1.49 1.77

1.08 0.81 0.81 1.03 1.03 1.03 0.87 0.97 0.97 1.00 0.97 0.93 0.82 0.97

0.419 0.374 0.431 0.519 0.511 0.525 0.703 0.852 0.848 0.876 0.903 0.676 0.852 0.993

7.9 0.33 –7.41) 0.88 –1.51) 0.74

Note: 3. Bearing numbers marked " # " designate J-series bearings. The tolerances of these bearings is listed in Table 6.6 on page A-42. 1) "−" means that load center at outside on end of inner ring.

B-163

Mass

(approx.)


● Tapered Roller Bearings Inch series J series T r1

C

r B φd

φD

a

d 50.800 ∼ 55.000mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm d

D

T

kN C

Cr

Cor

110 135 115 130 138 143 141 104 104 119 138 130 172 154 158

136 165 148 169 189 178 177 136 136 174 195 153 213 188 216

50.800

31.750 34.925 30.162 30.162 36.512 36.512 36.512 30.162 30.162 30.162 30.162 33.338 41.275 36.512 38.100

31.750 36.068 29.317 30.958 36.512 36.512 36.957 28.575 26.909 30.048 30.162 31.750 41.275 32.791 36.678

25.400 26.988 24.605 23.812 28.575 28.575 28.575 20.638 20.638 23.812 23.812 23.812 31.750 25.400 30.162

51.592

88.900

20.638

22.225

16.513

76.5

52.388

92.075 93.264 95.250

24.608 30.162 27.783

25.400 30.302 28.575

19.845 23.812 22.225

83.5 102 107

53.975

88.900 95.250 96.838 104.775 104.775 107.950 120.650 122.238 122.238 123.825 123.825 130.175 140.030

19.050 27.783 21.000 30.162 36.512 36.512 41.275 33.338 43.658 36.512 38.100 36.512 36.512

19.050 28.575 21.946 30.958 36.512 36.957 41.275 31.750 43.764 32.791 36.678 33.338 33.236

13.492 22.225 15.875 23.812 28.575 28.575 31.750 23.812 36.512 25.400 30.162 23.812 23.520

54.488

104.775

36.512

36.512

28.575

55.000

90.000

23.000

23.000

18.500

min-1

kgf

B

101.600 101.600 104.775 104.775 104.775 104.775 107.950 111.125 112.712 112.712 112.712 117.475 120.650 123.825 123.825

Limiting speeds static

Cr

Cor

grease

oil

11 200 13 800 11 700 13 200 14 000 14 500 14 400 10 600 10 600 12 200 14 100 13 200 17 500 15 700 16 100

13 900 16 800 15 000 17 300 19 300 18 100 18 100 13 900 13 900 17 800 19 800 15 600 21 700 19 200 22 000

3 700 3 800 3 500 3 500 3 600 3 700 3 600 3 200 3 200 3 200 3 200 3 300 3 300 2 900 3 000

5 000 5 000 4 700 4 700 4 800 4 900 4 800 4 200 4 200 4 300 4 200 4 400 4 400 3 900 4 100

7 800

9 250

4 100

5 500

116 134 139

8 550 10 400 10 900

11 800 13 700 14 200

4 000 4 000 3 900

5 300 5 300 5 200

61.0 107 78.0 130 138 141 172 134 194 154 158 156 171

82.5 139 96.5 169 189 177 213 163 283 188 216 186 212

6 200 10 900 7 950 13 200 14 000 14 400 17 500 13 700 19 700 15 700 16 100 15 900 17 400

8 450 14 200 9 850 17 300 19 300 18 100 21 700 16 600 28 900 19 200 22 000 19 000 21 600

4 000 3 900 3 700 3 500 3 600 3 600 3 300 3 100 3 100 2 900 3 000 2 700 2 600

5 300 5 200 5 000 4 700 4 800 4 800 4 400 4 200 4 100 3 900 4 100 3 600 3 400

138

189

14 000

19 300

3 600

4 800

109

7 900

11 100

3 900

5 300

77.5

90.5

Note: 1. With regard to the chamfer dimensions on the back face of the inner and outer rings, installation dimensions ras and r1as are larger than the maximum value. 2. Bearing numbers marked " # " designate J-series bearings. The accuracy of these bearings is listed in Table 6.6 on page A-42.

B-164


● Tapered Roller Bearings

r1a

Equivalent radial load dynamic Pr=XFr+YFa Fa Fa ≦e Fr Fr >e X Y X Y 1 0 0.4 Y2 static Por=0.5Fr+YoFa

ra φDa φdb

φda φDb

When Por<Fr use Por=Fr

For values of e, Y2 and Yo see the table below.

Bearing numbers

Abutment and fillet dimensions

Load Constant Axial center load factors mm

mm ras

r1as

max

max

3.5 0.8 0.8 6.4 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 2.3

3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3

da

db

Da

Db

4T-49585/49520 4T-529/522 4T-455/453X 4T-45284/45220 4T-HM807046/HM807010 4T-59200/59412 4T-537/532X 4T-HM907643/HM907614 4T-55200C/55443 4T-3975/3920 4T-39575/39520 4T-66200/66462 4T-619/612 4T-72200C/72487 4T-555/552A

66 59 60 71 70 68 65 74 71 68 68 71 67 77 66

59 58 59 59 63 61 59 65 65 61 61 65 61 67 62

88 89 92 93 89 92 94 91 92 99 101 100 105 102 109

96 95 98 99 100 99 100 105 106 106 107 111 110 116 116

4T-368S/362A

59

56

81

84

2

4T-28584/28521 4T-3767/3720 4T-33890/33821

65 63 61

58 59 59

83 82 85

87 88 90

4T-LM806649/LM806610 4T-33895/33822 4T-389A/382A 4T-45287/45220 4T-HM807049/HM807010 4T-539/532X 4T-621/612 4T-66584/66520 4T-5578/5535 4T-72212C/72487 4T-557S/552A 4T-HM911242/HM911210 4T-78214C/78551

63 63 61 62 73 68 70 75 73 79 71 79 79

60 60 60 62 63 61 63 68 67 67 65 74 77

80 86 89 93 89 94 105 105 106 102 109 109 117

4T-HM807048/HM807010

73

63

# 4T-JLM506849/JLM506810

63

61

kg

e

Y2

Yo

(approx.)

7.1 12.9 7.1 7.9 7.4 9.6 12.3 –7.21) –7.41) 4.5 6.6 0.4 14.4 –1.51) 9.4

0.40 0.29 0.34 0.33 0.49 0.40 0.30 0.88 0.88 0.40 0.34 0.63 0.31 0.74 0.35

1.50 2.10 1.79 1.80 1.23 1.49 2.02 0.68 0.68 1.49 1.77 0.96 1.91 0.81 1.73

0.82 1.16 0.98 0.99 0.68 0.82 1.11 0.37 0.37 0.82 0.97 0.53 1.05 0.45 0.95

1.13 1.24 1.19 1.22 1.49 1.44 1.55 1.36 1.34 1.53 1.54 1.67 2.3 2.1 2.34

1.3

4.0

0.32

1.88

1.03

0.507

3.5 2.3 1.5

0.8 3.3 2.3

4.6 8.3 8.0

0.38 0.34 0.33

1.59 1.77 1.82

0.87 0.97 1.00

0.677 0.819 0.851

85 90 92 99 100 100 110 116 116 116 116 124 132

2.3 1.5 0.8 0.8 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 0.8

2 0.8 0.8 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 2.3

–2.21) 8.0 3.1 7.9 7.4 12.3 14.4 –1.81) 13.3 –1.51) 9.4 –5.21) –8.51)

0.55 0.33 0.35 0.33 0.49 0.30 0.31 0.67 0.36 0.74 0.35 0.82 0.87

1.10 1.82 1.69 1.80 1.23 2.02 1.91 0.90 1.67 0.81 1.73 0.73 0.69

0.60 1.00 0.93 0.99 0.68 1.11 1.05 0.50 0.92 0.45 0.95 0.40 0.38

0.437 0.824 0.633 1.17 1.41 1.47 2.21 1.79 2.64 2.03 2.26 2.27 2.77

89

100

3.5

3.3

7.4

0.49

1.23

0.68

1.40

82

86

1.5

0.5

2.8

0.40

1.49

0.82

0.558

1)" − " means that load center at outside on end of inner ring.

B-165

a

Mass


● Tapered Roller Bearings Inch series J series T r1

C

r B φd

φD

a

d 55.000 ∼ 60.000mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm d

D

T

kN B

C

Cr

Limiting speeds static min-1

kgf Cor

Cr

Cor

grease

oil

55.000

95.000 96.838 110.000

29.000 21.000 39.000

29.000 21.946 39.000

23.500 15.875 32.000

107 78.0 173

144 96.5 219

10 900 7 950 17 600

14 700 9 850 22 400

3 800 3 700 3 500

5 100 5 000 4 600

55.562

97.630 123.825 127.000

24.608 36.512 36.512

24.608 32.791 36.512

19.446 25.400 26.988

88.5 154 163

128 188 228

9 000 15 700 16 600

13 000 19 200 23 300

3 700 2 900 2 900

4 900 3 900 3 800

55.575

96.838

21.000

21.946

15.875

78

96.5

7 950

9 850

3 700

5 000

57.150

96.838 96.838 96.838 96.838 97.630 104.775 104.775 104.775 107.950 110.000 110.000 112.712 112.712 112.712 117.475 117.475 120.650 123.825 123.825 140.030

21.000 21.000 21.000 21.000 24.608 30.162 30.162 30.162 27.783 22.000 27.795 30.162 30.162 30.162 30.162 33.338 41.275 36.512 38.100 36.512

21.946 21.946 21.946 21.946 24.608 29.317 29.317 30.958 29.317 21.996 29.317 30.048 30.162 30.162 30.162 31.750 41.275 32.791 36.678 33.236

15.875 15.875 15.875 15.875 19.446 24.605 24.605 23.812 22.225 18.824 27.000 23.812 23.812 23.812 23.812 23.812 31.750 25.400 30.162 23.520

78 78 78 78 88.5 115 115 130 115 89.5 115 119 138 138 117 130 172 154 158 171

96.5 96.5 96.5 96.5 128 148 148 169 148 120 148 174 195 195 175 153 213 188 216 212

7 950 7 950 7 950 7 950 9 000 11 700 11 700 13 200 11 700 9 150 11 700 12 200 14 100 14 100 11 900 13 200 17 500 15 700 16 100 17 400

9 850 9 850 9 850 9 850 13 000 15 000 15 000 17 300 15 000 12 300 15 000 17 800 19 800 19 800 17 900 15 600 21 700 19 200 22 000 21 600

3 700 3 700 3 700 3 700 3 700 3 500 3 500 3 500 3 500 3 200 3 500 3 200 3 200 3 200 3 000 3 300 3 300 2 900 3 000 2 600

5 000 5 000 5 000 5 000 4 900 4 700 4 700 4 700 4 700 4 300 4 700 4 300 4 200 4 200 4 000 4 400 4 400 3 900 4 100 3 400

57.531

96.838

21.000

21.946

15.875

78.0

96.5

7 950

9 850

3 700

5 000

59.972

122.238

33.338

31.750

23.812

134

163

13 700

16 600

3 100

4 200

59.987

146.050

41.275

39.688

25.400

199

234

20 300

23 900

2 400

3 200

60.000

95.000 107.950

24.000 25.400

24.000 25.400

19.000 19.050

122 140

8 500 9 350

12 400 14 200

3 700 3 200

4 900 4 300

83.0 91.5

Note: 1. Chamfer dimensions on the back face of the inner and outer rings of the bearing are larger than maximum values for installation dimensions ras and r1as. 2. As for the maximum value for inner ring bore diameters of bearings whose bearing numbers are marked with "†" (inner ring), the precision class is an integer for class 4 and class 2 bearings only.

B-166


● Tapered Roller Bearings

r1a

Equivalent radial load dynamic Pr=XFr+YFa Fa Fa ≦e Fr Fr >e X Y X Y 1 0 0.4 Y2 static Por=0.5Fr+YoFa

ra φDa φdb

φda φDb

When Por<Fr use Por=Fr

For values of e, Y2 and Yo see the table below.

Bearing numbers

Abutment and fillet dimensions

Load Constant Axial center load factors mm

mm

Mass kg

ras

r1as

max

max

a

e

Y2

Yo

(approx.)

da

db

Da

Db

# 4T-JM207049/JM207010 4T-385/382A # 4T-JH307749/JH307710

64 65 71

62 61 64

85 89 97

91 92 104

1.5 2.3 3

2.5 0.8 2.5

7.6 3.1 11.7

0.33 0.35 0.35

1.79 1.69 1.73

0.99 0.93 0.95

0.82 0.616 1.71

4T-28680/28622 4T-72218C/72487 4T-HM813840/HM813810

68 80 76

62 67 70

88 102 111

92 116 121

3.5 3.5 3.5

0.8 3.3 3.3

3.3 0.40 –1.51) 0.74 3.7 0.50

1.49 0.81 1.20

0.82 0.45 0.66

0.774 1.99 2.34

4T-389/382A

65

61

89

92

2.3

0.8

3.1

0.35

1.69

0.93

0.608

4T-387/382A 4T-387A/382A 4T-387AS/382A 4T-387S/382A 4T-28682/28622 4T-462/453X 4T-469/453X 4T-45289/45220 4T-469/453A 4T-390/394A 4T-469/454 4T-3979/3920 4T-39580/39520 4T-39581/39520 4T-33225/33462 4T-66225/66462 4T-623/612 4T-72225C/72487 4T-555S/552A 4T-78225/78551

66 69 72 63 70 67 70 65 70 70 70 72 72 81 74 76 72 81 73 83

62 62 62 62 63 63 63 65 63 66 63 66 66 66 68 69 66 67 67 77

89 89 89 89 88 92 92 93 97 101 96 99 101 101 104 100 105 102 109 117

92 92 92 92 92 98 98 99 100 104 100 106 107 107 112 111 110 116 116 132

2.3 3.5 5 0.8 3.5 2.3 3.5 0.8 3.5 2.3 3.5 3.5 3.5 8 3.5 3.5 3.5 3.5 3.5 3.5

0.8 0.8 0.8 0.8 0.8 3.3 3.3 3.3 0.8 1.3 2 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 2.3

3.1 3.1 3.1 3.1 3.3 7.1 7.1 7.9 7.1 0.7 7.1 4.5 6.6 6.6 2.6 0.4 14.4 –1.51) 9.4 –8.51)

0.35 0.35 0.35 0.35 0.40 0.34 0.34 0.33 0.34 0.40 0.34 0.40 0.34 0.34 0.44 0.63 0.31 0.74 0.35 0.87

1.69 1.69 1.69 1.69 1.49 1.79 1.79 1.80 1.79 1.49 1.79 1.49 1.77 1.77 1.38 0.96 1.91 0.81 1.73 0.69

0.93 0.93 0.93 0.93 0.82 0.98 0.98 0.99 0.98 0.82 0.98 0.82 0.97 0.97 0.76 0.53 1.05 0.45 0.95 0.38

0.583 0.581 0.576 0.585 0.747 1.06 1.06 1.1 1.11 0.954 1.24 1.4 1.41 1.4 1.58 1.54 2.12 1.96 2.18 2.69

4T-388A/382A

69

63

89

92

3.5

0.8

3.1

0.35

1.69

0.93

0.575

4T-66589/66520

74

73

105

116

0.8

3.3

–1.81) 0.67

0.90

0.50

1.66

4T-H913840†/H913810

88

82

124

138

3.5

3.3

–4.31) 0.78

0.77

0.42

3.22

75 75

66 68

85 96

91 103

5 3.5

2.5 3.3

1.49 1.31

0.82 0.72

0.606 0.992

# 4T-JLM508748/JLM508710 4T-29580/29520

3.0 0.6

0.40 0.46

Note: 3. Bearing numbers marked " # " designate J-series bearings. The tolerances of these bearings is listed in Table 6.6 on page A-42. 1)"−" means that load center at outside on end of inner ring.

B-167


● Tapered Roller Bearings Inch series J series T r1

C

r B φd

φD

a

d 60.000 ∼ 65.000mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm d

D

T

kN B

C

Cr

Limiting speeds static min-1

kgf Cor

Cr

Cor

grease

oil

60.000

110.000 130.000

22.000 34.100

21.996 30.924

18.824 22.650

89.5 156.0

120 186

9 150 15 900

12 300 19 000

3 200 2 700

4 300 3 600

60.325

100.000 112.712 122.238 122.238 123.825 127.000 127.000 130.175

25.400 30.162 38.100 43.658 38.100 36.512 44.450 36.512

25.400 30.048 38.354 43.764 36.678 36.512 44.450 33.338

19.845 23.812 29.718 36.512 30.162 26.988 34.925 23.812

90.5 119 187 194 158 163 203 156

134 174 244 283 216 228 263 186

9 200 12 200 19 100 19 700 16 100 16 600 20 700 15 900

13 600 17 800 24 900 28 900 22 000 23 300 26 800 19 000

3 500 3 200 3 100 3 100 3 000 2 900 3 100 2 700

4 700 4 300 4 100 4 100 4 100 3 800 4 200 3 600

61.912

110.000 136.525 146.050

22.000 46.038 41.275

21.996 46.038 39.688

18.824 36.512 25.400

89.5 224 199

120 355 234

9 150 22 800 20 300

12 300 36 500 23 900

3 200 2 600 2 400

4 300 3 500 3 200

61.976

101.600

24.608

24.608

19.845

90.5

134

9 200

13 600

3 500

4 700

62.738

101.600

25.400

25.400

19.845

90.5

134

9 200

13 600

3 500

4 700

63.500

94.458 107.950 107.950 110.000 110.000 112.712 112.712 120.000 120.000 122.238 122.238 123.825 127.000 127.000 136.525 140.030

19.050 25.400 25.400 22.000 25.400 30.162 30.162 29.794 29.794 38.100 43.658 38.100 36.512 36.512 41.275 36.512

19.050 25.400 25.400 21.996 25.400 30.048 30.162 29.007 29.007 38.354 43.764 36.678 36.170 36.512 41.275 33.236

15.083 19.050 19.050 18.824 19.050 23.812 23.812 24.237 24.237 29.718 36.512 30.162 28.575 26.988 31.750 23.520

60.5 91.5 91.5 89.5 91.5 119 138 128 128 187 194 158 163 163 194 171

103 140 140 120 140 174 195 177 177 244 283 216 229 228 262 212

6 150 9 350 9 350 9 150 9 350 12 200 14 100 13 000 13 000 19 100 19 700 16 100 16 600 16 600 19 800 17 400

10 500 14 200 14 200 12 300 14 200 17 800 19 800 18 100 18 100 24 900 28 900 22 000 23 300 23 300 26 700 21 600

3 600 3 200 3 200 3 200 3 200 3 200 3 200 3 000 3 000 3 100 3 100 3 000 2 900 2 900 2 800 2 600

4 800 4 300 4 300 4 300 4 300 4 300 4 200 4 000 4 000 4 100 4 100 4 100 3 800 3 800 3 800 3 400

65.000

105.000 110.000

24.000 28.000

23.000 28.000

18.500 22.500

85.0 119

117 174

8 700 12 200

11 900 17 800

3 300 3 200

4 500 4 300

Note: 1. Chamfer dimensions on the back face of the inner and outer rings of the bearing are larger than maximum values for installation dimensions ras and r1as. 2. Bearing numbers marked " # " designate J-series bearings. The accuracy of these bearings is listed in Table 6.6 on page A-42.

B-168


● Tapered Roller Bearings

r1a

Equivalent radial load dynamic Pr=XFr+YFa Fa Fa ≦e Fr Fr >e X Y X Y 1 0 0.4 Y2 static Por=0.5Fr+YoFa

ra φDa φdb

φda φDb

When Por<Fr use Por=Fr

For values of e, Y2 and Yo see the table below.

Bearing numbers

Abutment and fillet dimensions

Load Constant Axial center load factors mm

mm ras

r1as

max

max

da

db

Da

Db

4T-397/394A # 4T-JHM911244/JHM911211

69 84

68 74

101 109

104 123

0.8 3.5

1.3 3.3

4T-28985/28921 4T-3980/3920 4T-HM212044/HM212011 4T-5583/5535 4T-558/552A 4T-HM813841/HM813810 4T-65237/65500 4T-HM911245/HM911210

73 75 85 78 73 80 82 87

67 68 70 72 69 73 71 74

89 99 108 106 109 111 107 109

96 106 116 116 116 121 119 124

3.5 3.5 8 3.5 2.3 3.5 3.5 5

4T-392/394A 4T-H715334/H715311 4T-H913842/H913810

70 86 90

69 79 82

101 118 124

104 132 138

4T-28990/28920

72

68

90

4T-28995/28920

75

69

4T-L610549/L610510 4T-29585/29520 4T-29586/29520 4T-390A/394A 4T-29585/29521 4T-3982/3920 4T-39585/39520 4T-477/472 4T-483/472 4T-HM212046/HM212011 4T-5584/5535 4T-559/552A 4T-565/563 4T-HM813842/HM813810 4T-639/632 4T-78250/78551

71 77 73 73 77 77 77 73 78 80 81 78 80 82 81 85

# 4T-JLM710949/JLM710910 # 4T-JM511946/JM511910

77 78

Yo

(approx.)

0.7 0.40 –7.61) 0.82

1.49 0.73

0.82 0.40

0.91 2.01

3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3

2.5 4.5 11.1 13.3 9.4 3.7 9.3 –5.21)

0.43 0.40 0.34 0.36 0.35 0.50 0.49 0.82

1.41 1.49 1.78 1.67 1.73 1.20 1.23 0.73

0.78 0.82 0.98 0.92 0.95 0.66 0.68 0.40

0.772 1.33 2.02 2.44 2.1 2.21 2.65 2.12

0.8 3.5 3.5

1.3 3.3 3.3

0.7 0.40 8.7 0.47 –4.31) 0.78

1.49 1.27 0.77

0.82 0.70 0.42

0.879 3.47 3.17

97

2

3.3

1.7

0.43

1.41

0.78

0.768

90

97

3.5

3.3

2.5

0.43

1.41

0.78

0.764

69 71 71 70 71 71 71 72 72 73 75 72 73 76 74 79

86 96 96 101 99 99 101 107 107 108 106 109 112 111 118 117

91 103 103 104 104 106 107 114 114 116 116 116 120 121 125 132

1.5 3.5 1.5 1.5 3.5 3.5 3.5 0.8 3.5 3.5 3.5 3.5 3.5 3.5 3.5 2.3

1.5 3.3 3.3 1.3 1.3 3.3 3.3 2 2 3.3 3.3 3.3 3.3 3.3 3.3 2.3

–0.61) 0.6 0.6 0.7 0.6 4.5 6.6 3.9 3.9 11.1 13.3 9.4 8.3 3.7 11.4 –8.51)

0.42 0.46 0.46 0.40 0.46 0.40 0.34 0.38 0.38 0.34 0.36 0.35 0.36 0.50 0.36 0.87

1.41 1.31 1.31 1.49 1.31 1.49 1.77 1.56 1.56 1.78 1.67 1.73 1.65 1.20 1.66 0.69

0.78 0.72 0.72 0.82 0.72 0.82 0.97 0.86 0.86 0.98 0.92 0.95 0.91 0.66 0.91 0.38

0.449 0.924 0.929 0.851 0.982 1.26 1.27 1.49 1.48 1.95 2.34 2.01 2.11 2.12 2.85 2.54

71 72

96 99

101 105

3 3

1 2.5

0.3 3.4

0.45 0.40

1.32 1.49

0.73 0.82

0.742 1.08

B-169

e

kg

Y2

1)"−" means that load center at outside on end of inner ring.

a

Mass


● Tapered Roller Bearings Inch series J series T r1

C

r B φd

φD

a

d 65.000 ∼ 70.000mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm d

D

T

kN

Limiting speeds static min-1

kgf

B

C

Cr

Cor

Cr

Cor

grease

oil

65.000

120.000

39.000

38.500

32.000

185

248

18 800

25 300

3 100

4 100

65.088

135.755

53.975

56.007

44.450

278

380

28 300

38 500

2 900

3 800

66.675

103.213 107.950 110.000 112.712 112.712 112.712 122.238 123.825 127.000 130.175 135.755 136.525 136.525

17.602 25.400 22.000 30.162 30.162 30.162 38.100 38.100 36.512 41.275 53.975 41.275 41.275

17.602 25.400 21.996 30.048 30.048 30.162 38.354 36.678 36.512 41.275 56.007 41.275 41.275

11.989 19.050 18.824 23.812 23.812 23.812 29.718 30.162 26.988 31.750 44.450 31.750 31.750

60.0 91.5 89.5 119 119 138 187 158 163 194 278 194 226

78.0 140 120 174 174 195 244 216 228 262 380 262 293

6 100 9 350 9 150 12 200 12 200 14 100 19 100 16 100 16 600 19 800 28 300 19 800 23 100

8 000 14 200 12 300 17 800 17 800 19 800 24 900 22 000 23 300 26 700 38 500 26 700 29 900

3 300 3 200 3 200 3 200 3 200 3 200 3 100 3 000 2 900 2 800 2 900 2 800 2 700

4 400 4 300 4 300 4 300 4 300 4 200 4 100 4 100 3 800 3 800 3 800 3 800 3 700

68.262

110.000 120.000 123.825 136.525 136.525

22.000 29.794 38.100 41.275 46.038

21.996 29.007 36.678 41.275 46.038

18.824 24.237 30.162 31.750 36.512

89.5 128 158 226 224

120 177 216 293 355

9 150 13 000 16 100 23 100 22 800

12 300 18 100 22 000 29 900 36 500

3 200 3 000 3 000 2 700 2 600

4 300 4 000 4 100 3 700 3 500

69.850

112.712 117.475 120.000 120.000 120.650 127.000 136.525 146.050 150.089 168.275

25.400 30.162 29.794 32.545 25.400 36.512 41.275 41.275 44.450 53.975

25.400 30.162 29.007 32.545 25.400 36.170 41.275 41.275 46.672 56.363

19.050 23.812 24.237 26.195 19.050 28.575 31.750 31.750 36.512 41.275

95.5 117 128 147 95.5 163 194 206 261 340

151 175 177 214 151 229 262 295 360 460

9 750 11 900 13 000 15 000 9 750 16 600 19 800 21 000 26 600 34 500

15 400 17 900 18 100 21 800 15 400 23 300 26 700 30 000 37 000 46 500

3 100 3 000 3 000 3 000 3 100 2 900 2 800 2 500 2 400 2 200

4 100 4 000 4 000 4 000 4 100 3 800 3 800 3 300 3 200 3 000

69.952

121.442

24.608

23.012

17.462

91.0

127

9 300

13 000

2 900

3 800

70.000

110.000 115.000

26.000 29.000

25.000 29.000

20.500 23.000

97.0 124

150 171

9 900 12 700

15 300 17 500

3 200 3 100

4 200 4 100

Note: 1. Chamfer dimensions on the back face of the inner and outer rings of the bearing are larger than maximum values for installation dimensions ras and r1as. 2. Bearing numbers marked " # " designate J-series bearings. The accuracy of these bearings is listed in Table 6.6 on page A-42.

B-170


● Tapered Roller Bearings

r1a

Equivalent radial load dynamic Pr=XFr+YFa Fa Fa ≦e Fr Fr >e X Y X Y 1 0 0.4 Y2 static Por=0.5Fr+YoFa

ra φDa φdb

φda φDb

When Por<Fr use Por=Fr

For values of e, Y2 and Yo see the table below.

Bearing numbers

Abutment and fillet dimensions

Load Constant Axial center load factors mm

mm

Mass kg

ras

r1as

max

max

a

e

Y2

Yo

(approx.)

da

db

Da

Db

80

74

107

114

3

2.5

10.9

0.34

1.78

0.98

1.90

4T-6379/6320

84

77

117

126

3.5

3.3

18.8

0.32

1.85

1.02

3.71

4T-L812148/L812111 4T-29590/29520 4T-395A/394A 4T-3984/3925 4T-3994/3920 4T-39590/39520 4T-HM212049/HM212010 4T-560/552A 4T-HM813844/HM813810 4T-641/633 4T-6386/6320 4T-641/632 4T-H414242/H414210

74 80 73 80 84 80 82 81 85 83 87 83 85

72 73 73 74 74 74 75 75 78 77 77 77 81

96 96 101 101 99 101 110 109 111 116 117 118 121

99 103 104 106 106 107 116 116 121 124 126 125 129

1.5 3.5 0.8 3.5 5.5 3.5 3.5 3.5 3.5 3.5 4.3 3.5 3.5

0.8 3.3 1.3 0.8 3.3 3.3 1.5 3.3 3.3 3.3 3.3 3.3 3.3

–3.71) 0.6 0.7 4.5 4.5 6.6 11.1 9.4 3.7 11.4 18.8 11.4 11.0

0.49 0.46 0.40 0.40 0.40 0.34 0.34 0.35 0.50 0.36 0.32 0.36 0.36

1.23 1.31 1.49 1.49 1.49 1.77 1.78 1.73 1.20 1.66 1.85 1.66 1.67

0.68 0.72 0.82 0.82 0.82 0.97 0.98 0.95 0.66 0.91 1.02 0.91 0.92

0.48 0.86 0.796 1.19 1.18 1.19 1.86 1.92 2.03 2.41 3.64 2.74 2.75

4T-399A/394A 4T-480/472 4T-560S/552A 4T-H414245/H414210 4T-H715343/H715311

78 82 83 86 90

74 75 76 82 84

101 107 109 121 118

104 114 116 129 132

2.3 3.5 3.5 3.5 3.5

1.3 2 3.3 3.3 3.3

0.7 3.9 9.4 11.0 8.7

0.40 0.38 0.35 0.36 0.47

1.49 1.56 1.73 1.67 1.27

0.82 0.86 0.95 0.92 0.70

0.764 1.37 1.87 2.7 3.24

4T-29675/29620 4T-33275/33462 4T-482/472 4T-47487/47420 4T-29675/29630 4T-566/563 4T-643/632 4T-655/653 4T-745A/742 4T-835/832

80 84 83 84 80 85 86 88 88 91

77 77 77 78 77 78 80 82 82 84

101 104 107 107 104 112 118 131 134 149

109 112 114 114 113 120 125 139 142 155

1.5 3.5 3.5 3.5 1.5 3.5 3.5 3.5 3.5 3.5

3.3 3.3 2 3.3 3.3 3.3 3.3 3.3 3.3 3.3

–0.91) 2.6 3.9 6.1 –0.91) 8.3 11.4 8.0 12.0 18.5

0.49 0.44 0.38 0.36 0.49 0.36 0.36 0.41 0.33 0.30

1.23 1.38 1.56 1.67 1.23 1.65 1.66 1.47 1.84 2.00

0.68 0.76 0.86 0.92 0.68 0.91 0.91 0.81 1.01 1.10

0.949 1.28 1.33 1.47 1.17 1.92 2.63 3.28 3.92 6.13

4T-34274/34478

81

78

110

116

2

2

–1.21) 0.45

1.33

0.73

1.11

78 83

77 77

98 103

105 110

1 3

2.5 2.5

–0.31) 0.49 2.5 0.43

1.23 1.39

0.68 0.77

0.889 1.13

# 4T-JH211749/JH211710

# 4T-JLM813049/JLM813010 # 4T-JM612949/JM612910

1)"−" means that load center at outside on end of inner ring.

B-171


● Tapered Roller Bearings Inch series J series T r1

C

r B φd

φD

a

d 70.000 ∼ 76.200mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm d

D

T

kN

Limiting speeds static min-1

kgf

B

C

Cr

Cor

Cr

Cor

grease

oil

70.000

120.000 150.000

29.794 41.275

29.007 39.688

24.237 25.400

128 199

177 234

13 000 20 300

18 100 23 900

3 000 2 400

4 000 3 200

71.438

117.475 120.000 127.000 136.525 136.525 136.525

30.162 32.545 36.512 41.275 41.275 46.038

30.162 32.545 36.170 41.275 41.275 46.038

23.812 26.195 28.575 31.750 31.750 36.512

117 147 163 194 226 224

175 214 229 262 293 355

11 900 15 000 16 600 19 800 23 100 22 800

17 900 21 800 23 300 26 700 29 900 36 500

3 000 3 000 2 900 2 800 2 700 2 600

4 000 4 000 3 800 3 800 3 700 3 500

73.025

112.712 117.475 127.000 139.992 149.225 150.089

25.400 30.162 36.512 36.512 53.975 44.450

25.400 30.162 36.170 36.098 54.229 46.672

19.050 23.812 28.575 28.575 44.450 36.512

95.5 117 163 178 287 261

151 175 229 265 410 360

9 750 11 900 16 600 18 100 29 300 26 600

15 400 17 900 23 300 27 100 41 500 37 000

3 100 3 000 2 900 2 600 2 500 2 400

4 100 4 000 3 800 3 400 3 400 3 200

73.817

112.712 127.000

25.400 36.512

25.400 36.170

19.050 28.575

95.5 163

151 229

9 750 16 600

15 400 23 300

3 100 2 900

4 100 3 800

74.612

139.992

36.512

36.098

28.575

178

265

18 100

27 100

2 600

3 400

75.000

115.000 120.000 145.000

25.000 31.000 51.000

25.000 29.500 51.000

19.000 25.000 42.000

94.5 131 287

143 197 410

9 650 13 300 29 300

14 600 20 100 41 500

3 000 2 900 2 500

4 000 3 900 3 400

76.200

109.538 121.442 121.442 127.000 133.350 133.350 135.733 136.525 139.992 139.992 146.050 149.225 150.089

19.050 24.608 24.608 30.162 33.338 39.688 44.450 30.162 36.512 36.512 41.275 53.975 44.450

19.050 23.012 23.012 31.000 33.338 39.688 46.100 29.769 36.098 36.098 41.275 54.229 46.672

15.083 17.462 17.462 22.225 26.195 32.545 34.925 22.225 28.575 28.575 31.750 44.450 36.512

63.0 91.0 91.0 135 153 177 211 129 178 178 206 287 261

115 127 127 194 235 305 330 189 265 265 295 410 360

6 450 9 300 9 300 13 800 15 600 18 000 21 600 13 200 18 100 18 100 21 000 29 300 26 600

11 700 13 000 13 000 19 800 24 000 31 000 34 000 19 300 27 100 27 100 30 000 41 500 37 000

3 100 2 900 2 900 2 800 2 600 2 600 2 700 2 600 2 600 2 600 2 500 2 500 2 400

4 100 3 800 3 800 3 700 3 500 3 500 3 500 3 500 3 400 3 400 3 300 3 400 3 200

Note: 1. Chamfer dimensions on the back face of the inner and outer rings of the bearing are larger than maximum values for installation dimensions ras and r1as. 2. Bearing numbers marked " # " designate J-series bearings. The accuracy of these bearings is listed in Table 6.6 on page A-42.

B-172


● Tapered Roller Bearings

r1a

Equivalent radial load dynamic Pr=XFr+YFa Fa Fa ≦e Fr Fr >e X Y X Y 1 0 0.4 Y2 static Por=0.5Fr+YoFa

ra φDa φdb

φda φDb

When Por<Fr use Por=Fr

For values of e, Y2 and Yo see the table below.

Bearing numbers

Abutment and fillet dimensions

Load Constant Axial center load factors mm

mm ras

r1as

max

max

da

db

Da

Db

4T-484/472 # 4T-JH913848/JH913811

80 92

77 82

107 126

114 146

2 2

2 3.3

4T-33281/33462 4T-47490/47420 4T-567A/563 4T-644/632 4T-H414249/H414210 4T-H715345/H715311

85 86 86 87 89 93

79 79 80 81 83 87

104 107 112 118 121 118

112 114 120 125 129 132

3.5 3.5 3.5 3.5 3.5 3.5

4T-29685/29620 4T-33287/33462 4T-567/563 4T-576/572 4T-6460/6420 4T-744/742

86 87 88 90 93 91

80 80 81 83 87 85

101 104 112 125 129 134

109 112 120 133 140 142

4T-29688/29620 4T-568/563

83 83

80 82

101 112

4T-577/572

91

85

# 4T-JLM714149/JLM714110 # 4T-JM714249/JM714210 # 4T-JH415647/JH415610

87 88 94 84 86 89 90 97 93 94 92 92 99 93 108 93

4T-L814749/L814710 4T-34300/34478 4T-34301/34478 4T-42687/42620 4T-47678/47620 4T-HM516442/HM516410 4T-5760/5735 4T-495A/493 4T-575/572 4T-575S/572 4T-659/653 4T-6461A/6420 4T-748S/742

Yo

(approx.)

3.9 0.38 –4.31) 0.78

1.56 0.77

0.86 0.42

1.33 3.08

3.3 3.3 3.3 3.3 3.3 3.3

2.6 6.1 8.3 11.4 11.0 8.7

0.44 0.36 0.36 0.36 0.36 0.47

1.38 1.67 1.65 1.66 1.67 1.27

0.76 0.92 0.91 0.91 0.92 0.70

1.24 1.42 1.87 2.57 2.58 3.11

3.5 3.5 3.5 3.5 3.5 3.5

3.3 3.3 3.3 3.3 3.3 3.3

–0.91) 2.6 8.3 5.5 14.8 12.0

0.49 0.44 0.36 0.40 0.36 0.33

1.23 1.38 1.65 1.49 1.66 1.84

0.68 0.76 0.91 0.82 0.91 1.01

0.873 1.19 1.82 2.53 4.42 3.79

109 120

1.5 0.8

3.3 3.3

–0.91) 0.49 8.3 0.36

1.23 1.65

0.68 0.91

0.86 1.80

125

133

3.5

3.3

0.40

1.49

0.82

2.48

81 83 89

104 108 129

110 115 139

3 3 3

2.5 2.5 2.5

–0.31) 0.46 1.9 0.44 14.1 0.36

1.31 1.35 1.66

0.72 0.74 0.91

0.875 1.29 3.81

82 83 83 84 85 87 88 86 86 86 87 89 87

100 110 110 114 119 118 119 122 125 125 131 129 134

105 116 116 121 128 128 130 130 133 133 139 140 142

1.5 2 3.5 3.5 6.4 3.5 3.5 3.5 3.5 6.8 3.5 9.7 3.5

1.5 2 2 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3

–5.01) –1.21) –1.21) 2.8 3.9 7.5 11.0 0.7 5.5 5.5 8.0 14.8 12.0

1.20 1.33 1.33 1.43 1.48 1.49 1.48 1.35 1.49 1.49 1.47 1.66 1.84

0.66 0.73 0.73 0.79 0.82 0.82 0.81 0.74 0.82 0.82 0.81 0.91 1.01

0.579 0.982 0.977 1.46 1.92 2.43 2.75 1.83 2.43 2.41 3.04 4.23 3.66

B-173

5.5

e

kg

Y2

1)"−" means that load center at outside on end of inner ring.

a

Mass

0.50 0.45 0.45 0.42 0.40 0.40 0.41 0.44 0.40 0.40 0.41 0.36 0.33


● Tapered Roller Bearings Inch series J series T r1

C

r B φd

φD

a

d 76.200 ∼ 83.345mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm d

D

T

kN

Limiting speeds static min-1

kgf

B

C

Cr

Cor

Cr

Cor

grease

oil

76.200

149.225 161.925 180.975 190.500

53.975 53.975 53.975 57.150

54.229 55.100 53.183 57.531

44.450 42.862 35.720 46.038

287 310 325 445

410 460 415 610

29 300 31 500 33 000 45 000

41 500 47 000 42 500 62 000

2 500 2 300 1 900 1 900

3 400 3 000 2 600 2 600

77.788

117.475 121.442 127.000 136.525 136.525

25.400 24.608 30.162 30.162 46.038

25.400 23.012 31.000 29.769 46.038

19.050 17.462 22.225 22.225 36.512

99.5 91.0 135 129 224

162 127 194 189 355

10 200 9 300 13 800 13 200 22 800

16 500 13 000 19 800 19 300 36 500

2 900 2 900 2 800 2 600 2 600

3 900 3 800 3 700 3 500 3 500

79.375

146.050 161.925 190.500

41.275 47.625 57.150

41.275 48.260 57.531

31.750 38.100 46.038

206 270 445

295 385 610

21 000 27 500 45 000

30 000 39 000 62 000

2 500 2 300 1 900

3 300 3 100 2 600

80.000

130.000

35.000

34.000

28.500

166

249

16 900

25 400

2 700

3 600

80.962

133.350 136.525 139.992 150.089

33.338 30.162 36.512 44.450

33.338 29.769 36.098 46.672

26.195 22.225 28.575 36.512

153 129 178 261

235 189 265 360

15 600 13 200 18 100 26 600

24 000 19 300 27 100 37 000

2 600 2 600 2 600 2 400

3 500 3 500 3 400 3 200

82.550

125.412 133.350 133.350 136.525 139.992 139.992 146.050 150.089 152.400 152.400 161.925 161.925 168.275

25.400 33.338 39.688 30.162 36.512 36.512 41.275 44.450 39.688 41.275 47.625 53.975 53.975

25.400 33.338 39.688 29.769 36.098 36.098 41.275 46.672 36.322 41.275 48.260 55.100 56.363

19.845 26.195 32.545 22.225 28.575 28.575 31.750 36.512 30.162 31.750 38.100 42.862 41.275

102 153 177 129 178 178 206 261 180 206 270 310 340

163 235 305 189 265 265 295 360 279 295 385 460 460

10 400 15 600 18 000 13 200 18 100 18 100 21 000 26 600 18 300 21 000 27 500 31 500 34 500

16 600 24 000 31 000 19 300 27 100 27 100 30 000 37 000 28 400 30 000 39 000 47 000 46 500

2 700 2 600 2 600 2 600 2 600 2 600 2 500 2 400 2 300 2 500 2 300 2 300 2 200

3 600 3 500 3 500 3 500 3 400 3 400 3 300 3 200 3 100 3 300 3 100 3 000 3 000

83.345

125.412 125.412 125.412

25.400 25.400 25.400

25.400 25.400 25.400

19.845 19.845 19.845

102 102 102

163 163 163

10 400 10 400 10 400

16 600 16 600 16 600

2 700 2 700 2 700

3 600 3 600 3 600

Note: 1. Chamfer dimensions on the back face of the inner and outer rings of the bearing are larger than maximum values for installation dimensions ras and r1as. 2. As for the maximum value for inner and outer ring diameters of bearings whose bearing numbers are marked with "†" (inner ring) and "††" (outer ring), the precision class is an integer for class 4 and class 2 bearings only.

B-174


● Tapered Roller Bearings

r1a

Equivalent radial load dynamic Pr=XFr+YFa Fa Fa ≦e Fr Fr >e X Y X Y 1 0 0.4 Y2 static Por=0.5Fr+YoFa

ra φDa φdb

φda φDb

When Por<Fr use Por=Fr

For values of e, Y2 and Yo see the table below.

Bearing numbers

Abutment and fillet dimensions

Load Constant Axial center load factors mm

mm ras

r1as

max

max

da

db

Da

Db

4T-6461/6420 4T-6576/6535 4T-H917840/H917810†† 4T-HH221430/HH221410

96 99 110 101

89 92 100 95

129 141 152 171

140 154 170 179

3.5 3.5 3.5 3.5

3.3 3.3 3.3 3.3

4T-LM814849/LM814810 4T-34306/34478 4T-42690/42620 4T-495AS/493 4T-H715348/H715311

91 90 91 93 98

85 84 85 87 88

105 110 114 122 118

113 116 121 130 132

3.5 3.5 3.5 3.5 3.5

4T-661/653 4T-756A/752 4T-HH221431/HH221410

96 106 103

90 91 97

131 144 171

139 150 179

# 4T-JM515649/JM515610

94

88

117

4T-47681/47620 4T-496/493 4T-581/572 4T-740/742

95 95 96 101

89 89 90 91

4T-27687/27620 4T-47686/47620 4T-HM516448/HM516410 4T-495/493 4T-580/572 4T-582/572 4T-663/653 4T-749A/742 4T-595/592A 4T-663/652 4T-757/752 4T-6559C/6535 4T-842/832

96 97 105 97 98 104 99 99 100 99 100 104 101

4T-27689/27620 4T-27690/27620 4T-27691/27620

90 96 102

a

Mass kg

e

Y2

Yo

(approx.)

14.8 12.8 –0.51) 14.4

0.36 0.40 0.73 0.33

1.66 1.50 0.82 1.79

0.91 0.82 0.45 0.99

4.26 5.44 6.57 8.69

3.3 2 3.3 3.3 3.3

–2.31) –1.21) 2.8 0.7 8.7

0.51 0.45 0.42 0.44 0.47

1.18 1.33 1.43 1.35 1.27

0.65 0.73 0.79 0.74 0.70

0.932 0.943 1.41 1.78 2.84

3.5 8 3.5

3.3 3.3 3.3

8.0 12.0 14.4

0.41 0.34 0.33

1.47 1.76 1.79

0.81 0.97 0.99

2.91 4.55 8.52

125

3

2.5

4.9

0.39

1.54

0.85

1.73

119 122 125 134

128 130 133 142

3.5 3.5 3.5 5

3.3 3.3 3.3 3.3

3.9 0.7 5.5 12.0

0.40 0.44 0.40 0.33

1.48 1.35 1.49 1.84

0.82 0.74 0.82 1.01

1.78 1.69 2.26 3.43

89 90 92 90 91 91 92 93 93 92 94 98 94

115 119 118 122 125 125 131 134 135 134 144 141 149

120 128 128 130 133 133 139 142 144 141 150 154 155

3.5 3.5 6.8 3.5 3.5 6.8 3.5 3.5 3.5 3.5 3.5 3.5 3.5

1.5 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3

–0.61) 3.9 7.5 0.7 5.5 5.5 8.0 12.0 2.6 8.0 12.0 12.8 18.5

0.42 0.40 0.40 0.44 0.40 0.40 0.41 0.33 0.44 0.41 0.34 0.40 0.30

1.44 1.48 1.49 1.35 1.49 1.49 1.47 1.84 1.36 1.47 1.76 1.50 2.00

0.79 0.82 0.82 0.74 0.82 0.82 0.81 1.01 0.75 0.81 0.97 0.82 1.10

1.07 1.72 2.16 1.64 2.2 2.19 2.78 3.37 3.02 3.15 4.42 5.09 5.46

90 90 90

115 115 115

120 120 120

0.8 3.5 6.4

1.5 1.5 1.5

–0.61) 0.42 –0.61) 0.42 –0.61) 0.42

1.44 1.44 1.44

0.79 0.79 0.79

1.06 1.05 1.04

Note: 3. Bearing numbers marked " # " designate J-series bearings. The tolerances of these bearings is listed in Table 6.6 on page A-42. 1)" − " means that load center at outside on end of inner ring.

B-175


● Tapered Roller Bearings Inch series J series T r1

C

r B φd

φD

a

d 84.138 ∼ 95.000mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm d

D

T

kN

Limiting speeds static min-1

kgf

B

C

Cr

Cor

Cr

Cor

grease

oil

84.138

136.525

30.162

29.769

22.225

129

189

13 200

19 300

2 600

3 500

85.000

130.000 140.000

30.000 39.000

29.000 38.000

24.000 31.500

135 197

214 297

13 700 20 100

21 900 30 500

2 600 2 500

3 500 3 400

85.026

150.089

44.450

46.672

36.512

261

360

26 600

37 000

2 400

3 200

85.725

133.350 142.138 146.050 152.400 161.925

30.162 42.862 41.275 39.688 47.625

29.769 42.862 41.275 36.322 48.260

22.225 34.133 31.750 30.162 38.100

129 216 206 180 270

189 350 295 279 385

13 200 22 000 21 000 18 300 27 500

19 300 35 500 30 000 28 400 39 000

2 600 2 500 2 500 2 300 2 300

3 500 3 300 3 300 3 100 3 100

87.960

148.430

28.575

28.971

21.433

138

215

14 100

21 900

2 300

3 100

88.900

121.442 123.825 148.430 152.400 161.925 161.925 168.275

15.083 20.638 28.575 39.688 47.625 53.975 53.975

15.083 20.638 28.971 36.322 48.260 55.100 56.363

11.112 16.670 21.433 30.162 38.100 42.862 41.275

56.5 80.0 138 180 270 310 340

88.0 141 215 279 385 460 460

5 750 8 150 14 100 18 300 27 500 31 500 34 500

9 000 14 400 21 900 28 400 39 000 47 000 46 500

2 700 2 700 2 300 2 300 2 300 2 300 2 200

3 600 3 500 3 100 3 100 3 100 3 000 3 000

89.974

146.975

40.000

40.000

32.500

227

340

23 200

34 500

2 400

3 200

90.000

145.000 155.000 190.000

35.000 44.000 50.800

34.000 44.000 46.038

27.000 35.500 31.750

189 270 281

279 385 365

19 300 27 500 28 700

28 400 39 000 37 000

2 400 2 300 1 800

3 200 3 100 2 400

90.488

161.925

47.625

48.260

38.100

270

385

27 500

39 000

2 300

3 100

92.075

146.050 152.400 168.275

33.338 39.688 41.275

34.925 36.322 41.275

26.195 30.162 30.162

163 180 222

266 279 340

16 700 18 300 22 700

27 100 28 400 35 000

2 400 2 300 2 100

3 100 3 100 2 800

93.662

148.430

28.575

28.971

21.433

138

215

14 100

21 900

2 300

3 100

95.000

150.000

35.000

34.000

27.000

180

279

18 300

28 400

2 300

3 100

Note: 1. Chamfer dimensions on the back face of the inner and outer rings of the bearing are larger than maximum values for installation dimensions ras and r1as. 2. As for the maximum value for inner and outer ring diameters of bearings whose bearing numbers are marked with "†" (inner ring) and "††" (outer ring), the precision class is an integer for class 4 and class 2 bearings only.

B-176


● Tapered Roller Bearings

r1a

Equivalent radial load dynamic Pr=XFr+YFa Fa Fa ≦e Fr Fr >e X Y X Y 1 0 0.4 Y2 static Por=0.5Fr+YoFa

ra φDa φdb

φda φDb

When Por<Fr use Por=Fr

For values of e, Y2 and Yo see the table below.

Bearing numbers

Abutment and fillet dimensions

Load Constant Axial center load factors mm

mm ras

r1as

max

max

a

da

db

Da

Db

98

91

122

130

3.5

3.3

104 100

92 94

117 125

125 134

6 3

4T-749/742

101

95

134

142

4T-497/492A 4T-HM617049/HM617010 4T-665/653 4T-596/592A 4T-758/752

99 106 102 102 103

93 95 95 96 97

120 125 131 135 144

4T-42346/42584

103

98

4T-LL217849/LL217810 4T-L217849/L217810 4T-42350/42584 4T-593/592A 4T-759/752 4T-6580/6535 4T-850/832

97 97 104 104 106 109 106

4T-HM218248†/HM218210†† # 4T-JM718149/JM718110 # 4T-JHM318448/JHM318410 # 4T-J90354/J90748

Mass kg

e

Y2

Yo

0.7

0.44

1.35

0.74

1.6

2.5 2.5

0.2 5.9

0.44 0.41

1.35 1.47

0.74 0.81

1.37 2.3

3.5

3.3

12.0

0.33

1.84

1.01

3.25

128 137 139 144 150

3.5 4.8 3.5 3.5 3.5

3.3 3.3 3.3 3.3 3.3

0.7 6.9 8.0 2.6 12.0

0.44 0.43 0.41 0.44 0.34

1.35 1.39 1.47 1.36 1.76

0.74 0.76 0.81 0.75 0.97

1.43 2.69 2.65 2.9 4.26

134

142

3

3

–3.01) 0.49

1.22

0.67

1.99

94 94 98 98 99 102 100

115 116 134 135 144 141 149

117 119 142 144 150 154 155

1.5 1.5 3 3.5 3.5 3.5 3.5

1.5 1.5 3 3.3 3.3 3.3 3.3

–2.91) –0.71) –3.01) 2.6 12.0 12.8 18.5

0.33 0.33 0.49 0.44 0.34 0.40 0.30

1.81 1.82 1.22 1.36 1.76 1.50 2.00

1.00 1.00 0.67 0.75 0.97 0.82 1.10

0.452 0.737 1.96 2.78 4.09 4.73 5.08

112

99

133

141

7

3.5

8.6

0.33

1.80

0.99

2.55

105 106 120

99 100 112

131 140 162

139 148 179

3 3 3.5

2.5 2.5 3.3

2.0 0.44 10.1 0.34 –12.91) 0.87

1.35 1.76 0.69

0.74 0.97 0.38

2.14 3.32 6.32

4T-760/752

107

101

144

150

3.5

3.3

12.0

0.34

1.76

0.97

4.01

4T-47890/47820 4T-598A/592A 4T-681/672

107 113 110

101 101 104

131 135 149

140 144 160

3.5 6.4 3.5

3.3 3.3 3.3

0.6 2.6 3.0

0.45 0.44 0.47

1.34 1.36 1.28

0.74 0.75 0.70

2.08 2.63 3.87

4T-42368/42584

107

102

134

142

3

3

–3.01) 0.49

1.22

0.67

1.8

109

104

135

143

3

2.5

1.36

0.75

2.19

4T-498/493 # 4T-JM716648/JM716610 # 4T-JHM516849/JHM516810

# 4T-JM719149/JM719113

1.7

0.44

Note: 3. Bearing numbers marked " # " designate J-series bearings. The tolerances of these bearings is listed in Table 6.6 on page A-42. 1)" − " means that load center at outside on end of inner ring.

B-177

(approx.)


● Tapered Roller Bearings Inch series J series T r1

C

r B φd

φD

a

d 95.250 ∼ 109.538mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm d

D

T

kN B

C

Cr

Limiting speeds static min-1

kgf Cor

Cr

Cor

grease

oil

95.250

130.175 146.050 147.638 148.430 152.400 157.162 168.275 190.500

20.638 33.338 35.717 28.575 39.688 36.512 41.275 57.150

21.433 34.925 36.322 28.971 36.322 36.116 41.275 57.531

16.670 26.195 26.192 21.433 30.162 26.195 30.162 46.038

81.0 163 180 138 180 188 222 445

147 266 279 215 279 305 340 610

8 300 16 700 18 300 14 100 18 300 19 200 22 700 45 000

15 000 27 100 28 400 21 900 28 400 31 000 35 000 62 000

2 500 2 400 2 300 2 300 2 300 2 200 2 100 1 900

3 300 3 100 3 100 3 100 3 100 2 900 2 800 2 600

96.838

148.430 188.912

28.575 50.800

28.971 46.038

21.433 31.750

138 281

215 365

14 100 28 700

21 900 37 000

2 300 1 800

3 100 2 400

98.425

157.162 168.275

36.512 41.275

36.116 41.275

26.195 30.162

188 222

305 340

19 200 22 700

31 000 35 000

2 200 2 100

2 900 2 800

99.974

212.725

66.675

66.675

53.975

575

810

58 500

82 500

1 700

2 300

100.000

155.000

36.000

35.000

28.000

192

310

19 600

31 500

2 200

2 900

100.012

157.162

36.512

36.116

26.195

188

305

19 200

31 000

2 200

2 900

101.600

157.162 168.275 180.975 190.500 190.500 190.500 212.725 212.725

36.512 41.275 47.625 57.150 57.150 57.150 66.675 66.675

36.116 41.275 48.006 57.531 57.531 57.531 66.675 66.675

26.195 30.162 38.100 44.450 46.038 46.038 53.975 53.975

188 222 285 380 445 445 475 575

305 340 430 555 610 610 695 810

19 200 22 700 29 100 38 500 45 000 45 000 48 500 58 500

31 000 35 000 44 000 56 500 62 000 62 000 71 000 82 500

2 200 2 100 2 000 2 000 1 900 1 900 1 800 1 700

2 900 2 800 2 700 2 600 2 600 2 600 2 300 2 300

104.775

180.975

47.625

48.006

38.100

285

430

29 100

44 000

2 000

2 700

107.950

158.750 159.987 165.100 212.725

23.020 34.925 36.512 66.675

21.438 34.925 36.512 66.675

15.875 26.988 26.988 53.975

102 167 191 475

166 320 315 695

10 400 17 100 19 500 48 500

17 000 33 000 32 000 71 000

2 100 2 100 2 100 1 800

2 800 2 800 2 700 2 300

109.538

158.750

23.020

21.438

15.875

102

166

10 400

17 000

2 100

2 800

Note: 1. Chamfer dimensions on the back face of the inner and outer rings of the bearing are larger than maximum values for installation dimensions ras and r1as. 2. As for the maximum value for inner and outer ring diameters of bearings whose bearing numbers are marked with "†" (inner ring) and "††" (outer ring), the precision class is an integer for class 4 and class 2 bearings only.

B-178


● Tapered Roller Bearings

r1a

Equivalent radial load dynamic Pr=XFr+YFa Fa Fa ≦e Fr Fr >e X Y X Y 1 0 0.4 Y2 static Por=0.5Fr+YoFa

ra φDa φdb

φda φDb

When Por<Fr use Por=Fr

For values of e, Y2 and Yo see the table below.

Bearing numbers

Abutment and fillet dimensions

Load Constant Axial center load factors mm

mm ras

r1as

max

max

da

db

Da

Db

4T-L319249/L319210 4T-47896/47820 4T-594A/592XE 4T-42375/42584 4T-594/592A 4T-52375/52618 4T-683/672 4T-HH221440/HH221410

103 110 113 108 110 112 113 125

101 103 104 103 104 105 106 110

122 131 135 134 135 142 149 171

125 140 142 142 144 152 160 179

1.5 3.5 5 3 3.5 3.5 3.5 8

1.5 3.3 0.8 3 3.3 3.3 3.3 3.3

4T-42381/42584 4T-90381/90744

110 125

104 113

134 161

142 179

3.5 3.5

3 3.3

4T-52387/52618 4T-685/672

114 116

108 109

142 149

152 160

3.5 3.5

3.3 3.3

0.6 3.0

4T-HH224334†/HH224310

124

120

192

202

3.5

3.3

18.9

115

109

140

149

3

2.5

4T-52393/52618

116

109

142

152

3.5

3.3

0.6

4T-52400/52618 4T-687/672 4T-780/772†† 4T-861/854 4T-HH221449/HH221410 4T-HH221449A/HH221410 4T-941/932 4T-HH224335/HH224310

117 118 119 129 131 122 130 132

111 112 113 114 116 116 117 121

142 149 161 170 171 171 187 192

152 160 168 174 179 179 193 202

3.5 3.5 3.5 8 8 3.5 7 7

3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3

4T-782/772††

122

116

161

168

3.5

4T-37425/37625 4T-LM522546/LM522510 4T-56425/56650 4T-936/932

122 122 123 137

115 116 117 122

143 146 149 187

152 154 159 193

4T-37431/37625

123

116

143

152

# 4T-JM720249/JM720210

a

kg

e

Y2

Yo

(approx.)

0.35 0.45 0.44 0.49 0.44 0.47 0.47 0.33

1.72 1.34 1.36 1.22 1.36 1.26 1.28 1.79

0.95 0.74 0.75 0.67 0.75 0.69 0.70 0.99

0.789 1.95 2.09 1.75 2.51 2.76 3.72 7.5

–3.01) 0.49 –12.91) 0.87

1.22 0.69

0.67 0.38

1.69 5.67

0.47 0.47

1.26 1.28

0.69 0.70

2.62 3.56

0.33

1.84

1.01

11.5

–0.31) 0.47

1.27

0.70

2.4

0.47

1.26

0.69

2.55

0.6 3.0 8.1 15.3 14.4 14.4 19.7 18.9

0.47 0.47 0.39 0.33 0.33 0.33 0.33 0.33

1.26 1.28 1.56 1.79 1.79 1.79 1.84 1.84

0.69 0.70 0.86 0.99 0.99 0.99 1.01 1.01

2.48 3.4 5.11 7 7.06 7.06 11.2 11.3

3.3

8.1

0.39

1.56

0.86

4.92

3.5 3.5 3.5 8

3.3 3.3 3.3 3.3

–14.01) 1.4 –2.01) 19.7

0.61 0.40 0.50 0.33

0.99 1.49 1.21 1.84

0.54 0.82 0.66 1.01

1.37 2.37 2.69 10.7

3.5

3.3

–14.01) 0.61

0.99

0.54

1.33

–1.01) 0.6 2.6 –3.01) 2.6 0.6 3.0 14.4

Note: 3. Bearing numbers marked " # " designate J-series bearings. The tolerances of these bearings is listed in Table 6.6 on page A-42. 1)" − " means that load center at outside on end of inner ring.

B-179

Mass


● Tapered Roller Bearings Inch series J series T r1

C

r B φd

φD

a

d 109.987 ∼ 133.350mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm d

D

T

kN

Limiting speeds static min-1

kgf

B

C

Cr

Cor

Cr

Cor

grease

oil

109.987

159.987

34.925

34.925

26.988

167

320

17 100

33 000

2 100

2 800

109.992

177.800

41.275

41.275

30.162

232

375

23 600

38 000

1 900

2 600

110.000

165.000 180.000

35.000 47.000

35.000 46.000

26.500 38.000

191 305

315 480

19 500 31 000

32 000 49 000

2 100 1 900

2 700 2 600

111.125

214.312

55.562

52.388

39.688

405

560

41 500

57 000

1 500

2 000

114.300

177.800 180.975 212.725 212.725 228.600

41.275 34.925 66.675 66.675 53.975

41.275 31.750 66.675 66.675 49.428

30.162 25.400 53.975 53.975 38.100

232 169 475 575 430

375 245 695 810 620

23 600 17 200 48 500 58 500 44 000

38 000 25 000 71 000 82 500 63 500

1 900 1 900 1 800 1 700 1 400

2 600 2 500 2 300 2 300 1 900

115.087

190.500

47.625

49.212

34.925

300

475

30 500

48 500

1 800

2 500

117.475

180.975

34.925

31.750

25.400

169

245

17 200

25 000

1 900

2 500

120.000

170.000

25.400

25.400

19.050

127

210

13 000

21 400

2 000

2 600

120.650

234.950

63.500

63.500

49.212

525

825

53 500

84 000

1 500

2 000

123.825

182.562

39.688

38.100

33.338

224

435

22 900

44 000

1 800

2 400

127.000

182.562 196.850 215.900 228.600 228.600 230.000 254.000

39.688 46.038 47.625 53.975 53.975 63.500 77.788

38.100 46.038 47.625 49.428 49.428 63.500 82.550

33.338 38.100 34.925 38.100 38.100 49.212 61.912

224 310 320 320 430 525 740

435 550 540 445 620 825 1 070

22 900 31 500 32 500 32 500 44 000 53 500 75 500

44 000 56 500 55 000 45 000 63 500 84 000 109 000

1 800 1 700 1 600 1 400 1 400 1 500 1 400

2 400 2 200 2 100 1 900 1 900 2 000 1 900

128.588

206.375

47.625

47.625

34.925

315

520

32 000

53 000

1 700

2 200

130.175

196.850 206.375

46.038 47.625

46.038 47.625

38.100 34.925

310 315

550 520

31 500 32 000

56 500 53 000

1 700 1 700

2 200 2 200

133.350

177.008

25.400

26.195

20.638

126

259

12 900

26 400

1 800

2 400

Note: 1. Chamfer dimensions on the back face of the inner and outer rings of the bearing are larger than maximum values for installation dimensions ras and r1as. 2. As for the maximum value for inner and outer ring diameters of bearings whose bearing numbers are marked with "†" (inner ring) and "††" (outer ring), the precision class is an integer for class 4 and class 2 bearings only.

B-180


● Tapered Roller Bearings

r1a

Equivalent radial load dynamic Pr=XFr+YFa Fa Fa ≦e Fr Fr >e X Y X Y 1 0 0.4 Y2 static Por=0.5Fr+YoFa

ra φDa φdb

φda φDb

When Por<Fr use Por=Fr

For values of e, Y2 and Yo see the table below.

Bearing numbers

Abutment and fillet dimensions

Load Constant Axial center load factors mm

mm ras

r1as

max

max

a

1.4

da

db

Da

Db

4T-LM522548/LM522510

133

118

146

154

8

3.3

4T-64433/64700

128

121

160

172

3.5

124 127

119 122

149 162

159 172

4T-H924045/H924010

139

131

186

4T-64450/64700 4T-68450/68712†† 4T-938/932 4T-HH224346/HH224310 4T-HM926740/HM926710

131 130 141 143 146

125 123 128 131 142

4T-71453/71750

133

4T-68462/68712††

Mass kg

e

Y2

Yo

(approx.)

0.40

1.49

0.82

2.24

3.3

–1.11) 0.52

1.16

0.64

3.77

3 3

2.5 2.5

–3.01) 0.50 6.0 0.41

1.21 1.48

0.66 0.81

2.52 4.61

205

3.5

3.3

–6.81) 0.67

0.89

0.49

8.18

160 163 187 192 200

172 172 193 202 219

3.5 3.5 7 7 3.5

3.3 3.3 3.3 3.3 3.3

–1.11) –5.41) 19.7 18.9 –13.51)

0.52 0.50 0.33 0.33 0.74

1.16 1.21 1.84 1.84 0.81

0.64 0.66 1.01 1.01 0.45

3.52 2.93 10.1 10.2 9.76

126

171

181

3.5

3.3

6.7

0.42

1.44

0.79

5.11

132

125

163

172

3.5

3.3

–5.41) 0.50

1.21

0.66

2.78

132

127

156

163

3.3

3.3

–7.91) 0.46

1.31

0.72

1.67

4T-95475/95925

149

137

209

217

6.4

3.3

14.0

0.37

1.62

0.89

4T-48286/48220

139

133

168

176

3.5

3.3

5.7

0.31

1.97

1.08

3.52

4T-48290/48220 4T-67388/67322 4T-74500/74850 4T-97500/97900 4T-HM926747/HM926710 4T-95500/95905 4T-HH228349/HH228310

141 144 148 151 156 154 164

135 138 141 144 143 142 148

168 180 196 197 200 207 223

176 189 208 213 219 217 234

3.5 3.5 3.5 3.5 3.5 6.4 9.7

3.3 3.3 3.3 3.3 3.3 3.3 6.4

5.7 6.3 –2.21) –13.41) –13.51) 14.0 23.4

0.31 0.34 0.49 0.74 0.74 0.37 0.32

1.97 1.74 1.23 0.81 0.81 1.62 1.87

1.08 0.96 0.68 0.45 0.45 0.89 1.03

3.33 5.1 7.05 8.43 8.83 12.9 19.5

4T-799/792

146

140

186

198

3.3

3.3

1.9

0.46

1.31

0.72

5.77

4T-67389/67322 4T-799A/792

146 148

141 142

180 186

189 198

3.5 3.5

3.3 3.3

6.3 1.9

0.34 0.46

1.74 1.31

0.96 0.72

4.87 5.65

4T-L327249/L327210

142

140

167

171

1.5

1.5

–3.71) 0.35

1.72

0.95

1.7

# 4T-JM822049/JM822010 # 4T-JHM522649/JHM522610

# 4T-JL724348/JL724314

Note: 3. Bearing numbers marked " # " designate J-series bearings. The tolerances of these bearings is listed in Table 6.6 on page A-42. 1)" − " means that load center at outside on end of inner ring.

B-181

12.6


● Tapered Roller Bearings Inch series J series T r1

C

r B φd

φD

a

d 133.350 ∼ 196.850mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm d

D

T

kN

Limiting speeds static min-1

kgf

B

C

Cr

Cor

Cr

Cor

grease

oil

133.350

190.500 196.850 196.850 215.900 234.950

39.688 46.038 46.038 47.625 63.500

39.688 46.038 46.038 47.625 63.500

33.338 38.100 38.100 34.925 49.212

236 310 310 320 525

475 550 550 540 825

24 100 31 500 31 500 32 500 53 500

48 500 56 500 56 500 55 000 84 000

1 700 1 700 1 700 1 600 1 500

2 300 2 200 2 200 2 100 2 000

136.525

190.500 228.600

39.688 57.150

39.688 57.150

33.338 44.450

236 445

475 735

24 100 45 500

48 500 75 000

1 700 1 500

2 300 2 000

139.700

215.900 228.600 254.000

47.625 57.150 66.675

47.625 57.150 66.675

34.925 44.450 47.625

320 445 550

540 735 910

32 500 45 500 56 000

55 000 75 000 92 500

1 600 1 500 1 400

2 100 2 000 1 800

142.875

200.025 200.025

41.275 41.275

39.688 39.688

34.130 34.130

239 239

490 490

24 300 24 300

50 000 50 000

1 600 1 600

2 100 2 100

146.050

193.675 254.000

28.575 66.675

28.575 66.675

23.020 47.625

165 550

340 910

16 800 56 000

35 000 92 500

1 600 1 400

2 200 1 800

152.400

192.088 222.250

25.000 46.830

24.000 46.830

19.000 34.925

130 315

261 585

13 200 32 000

26 700 60 000

1 600 1 500

2 100 2 000

158.750

205.583 225.425

23.812 41.275

23.812 39.688

18.258 33.338

126 254

247 555

12 900 25 900

25 200 56 500

1 500 1 400

2 000 1 900

165.100

225.425

41.275

39.688

33.338

254

555

25 900

56 500

1 400

1 900

170.000

230.000

39.000

38.000

31.000

282

520

28 700

53 000

1 400

1 800

177.800

227.012 247.650

30.162 47.625

30.162 47.625

23.020 38.100

181 340

415 690

18 500 35 000

42 000 70 500

1 300 1 300

1 800 1 700

180.000

250.000

47.000

45.000

37.000

370

710

37 500

72 500

1 300

1 700

190.000

260.000

46.000

44.000

36.500

365

720

37 000

73 500

1 200

1 600

196.850

241.300

23.812

23.017

17.462

160

330

16 300

33 500

1 200

1 600

Note: 1. Chamfer dimensions on the back face of the inner and outer rings of the bearing are larger than maximum values for installation dimensions ras and r1as. 2. Bearing numbers marked " # " designate J-series bearings. The tolerances of these bearings is listed in Table 6.6 on page A-42.

B-182


● Tapered Roller Bearings

r1a

Equivalent radial load dynamic Pr=XFr+YFa Fa Fa ≦e Fr Fr >e X Y X Y 1 0 0.4 Y2 static Por=0.5Fr+YoFa

ra φDa φdb

φda φDb

When Por<Fr use Por=Fr

For values of e, Y2 and Yo see the table below.

Bearing numbers

Abutment and fillet dimensions

Load Constant Axial center load factors mm

mm ras

r1as

max

max

da

db

Da

Db

4T-48385/48320 4T-67390/67322 4T-67391/67322 4T-74525/74850 4T-95525/95925

148 149 157 152 166

142 143 143 146 148

177 180 180 196 209

184 189 189 208 217

3.5 3.5 8 3.5 9.7

3.3 3.3 3.3 3.3 3.3

4T-48393/48320 4T-896/892

151 156

144 150

177 205

184 216

3.5 3.5

3.3 3.3

4T-74550/74850 4T-898/892 4T-99550/99100

158 160 170

151 153 156

196 205 227

208 216 238

3.5 3.5 7

3.3 3.3 3.3

4T-48684/48620 4T-48685/48620

166 158

151 151

185 185

193 193

8 3.5

3.3 3.3

4T-36690/36620 4T-99575/99100

155 175

153 162

182 227

188 238

1.5 7

4T-L630349/L630310 4T-M231648/M231610

162 178

158 163

183 207

187 213

4T-L432349/L432310 4T-46780/46720

168 176

166 169

195 209

4T-46790/46720

181

174

184

kg

e

Y2

Yo

4.0 6.3 6.3 –2.21) 14.0

0.32 0.34 0.34 0.49 0.37

1.87 1.74 1.74 1.23 1.62

1.03 0.96 0.96 0.68 0.89

3.64 4.63 4.59 6.56 11.3

4.0 6.0

0.32 0.42

1.87 1.43

1.03 0.78

3.43 9.07

–2.21) 0.49 6.0 0.42 12.1 0.41

1.23 1.43 1.47

0.68 0.78 0.81

6.05 8.76 14.3

0.34 0.34

1.78 1.78

0.98 0.98

3.85 3.89

1.5 3.3

–5.01) 0.37 12.1 0.41

1.63 1.47

0.90 0.81

2.27 13.5

2 8

2 1.5

–10.01) 0.42 5.9 0.33

1.44 1.8

0.79 0.99

1.53 5.72

199 218

1.5 3.5

1.5 3.3

–9.81) 0.37 –2.61) 0.38

1.61 1.57

0.88 0.86

1.89 5.2

209

218

3.5

3.3

–2.61) 0.38

1.57

0.86

4.69

178

217

224

3

2.5

–4.71) 0.38

1.57

0.86

4.37

188 194

186 188

214 229

221 240

1.5 3.5

1.5 3.3

–12.81) 0.44 –4.81) 0.44

1.36 1.36

0.75 0.75

2.92 6.57

# 4T-JM736149/JM736110

196

190

232

243

3

2.5

–9.01) 0.48

1.25

0.69

6.76

# 4T-JM738249/JM738210

206

200

242

252

3

2.5

–10.91) 0.48

1.26

0.69

6.85

4T-LL639249/LL639210

205

203

232

236

1.5

1.5

–17.31) 0.42

1.44

0.79

2.07

# 4T-JHM534149/JHM534110 4T-36990/36920 4T-67790/67720

1)"−" means that load center at outside on end of inner ring.

B-183

a

Mass

3.1 3.1

(approx.)


● Double Row Tapered Roller Bearings Back-to-back arrangement B1 C r1 r

φD

φd

a

d 40 ∼ 70mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm

kN

d

D

B1

C

rs min1)

40

80 80 90 90

45 55 56 56

37.5 43.5 39.5 45.5

1.5 1.5 2 2

45

85 85 100 100

47 55 60 60

37.5 43.5 41.5 49.5

50

90 90 110 110 110

49 55 64 64 90

55

100 100 120 120 120

r1s min1)

Limiting speeds static min-1

kgf

Cr

Cor

Cr

Cor

grease

oil

0.6 0.6 0.6 0.6

105 136 132 157

134 187 171 204

10 700 13 900 13 500 16 000

13 700 19 100 17 400 20 800

4 100 4 100 3 200 3 700

5 500 5 500 4 200 4 900

1.5 1.5 2 2

0.6 0.6 0.6 0.6

116 141 165 191

157 200 218 251

11 800 14 300 16 800 19 500

16 000 20 400 22 200 25 600

3 700 3 700 2 800 3 300

4 900 4 900 3 800 4 400

39.5 43.5 43.5 51.5 71.5

1.5 1.5 2.5 2.5 2.5

0.6 0.6 0.6 0.6 0.6

132 150 194 227 315

186 218 260 305 465

13 500 15 300 19 800 23 200 32 000

18 900 22 200 26 600 31 000 47 500

3 400 3 400 2 600 3 000 3 000

4 500 4 500 3 500 4 000 4 000

51 60 70 70 97

41.5 48.5 49 57 76

2 2 2.5 2.5 2.5

0.6 0.6 0.6 0.6 0.6

160 186 226 266 370

221 269 305 360 550

16 300 18 900 23 100 27 100 37 500

22 600 27 400 31 500 36 500 56 000

3 100 3 100 2 400 2 700 2 700

4 100 4 100 3 100 3 700 3 700

60

110 110 130 130 130

53 66 74 74 104

43.5 54.5 51 59 81

2 2 3 3 3

0.6 0.6 1 1 1

180 223 258 310 420

249 330 350 420 625

18 300 22 700 26 300 31 500 42 500

25 400 33 500 36 000 43 000 64 000

2 800 2 800 2 200 2 500 2 500

3 800 3 800 2 900 3 400 3 400

65

120 120 140 140 140

56 73 79 79 108

46.5 61.5 53 63 84

2 2 3 3 3

0.6 0.6 1 1 1

211 273 297 350 470

295 410 410 475 700

21 500 27 800 30 500 35 500 47 500

30 000 42 000 41 500 48 500 71 500

2 600 2 600 2 000 2 300 2 300

3 500 3 500 2 700 3 100 3 100

70

125 125 150 150 150

59 74 83 83 116

48.5 61.5 57 67 92

2 2 3 3 3

0.6 0.6 1 1 1

225 285 330 395 530

325 440 460 545 805

23 000 29 000 33 500 40 000 54 000

33 000 45 000 46 500 55 500 82 500

2 400 2 400 1 900 2 200 2 200

3 200 3 200 2 500 2 900 2 900

1)Minimum allowable dimension for chamfer dimension r or r1.

B-184


● Double Row Tapered Roller Bearings

Sb r1a Equivalent radial load dynamic Pr=XFr+YFa Fa Fa ≦e Fr Fr >e X Y X Y 1 Y1 0.67 Y2 static Por=Fr+YoFa For values of e, Y2 and Yo see the table below.

ra

φDb

φda

Bearing numbers

Abutment and fillet dimensions

Load center mm

mm da

Db

Sb

ras

r1as

min

min

min

max

max

 4T-430208X  4T-432208X  4T-430308DX  4T-430308

48.5 48.5 50 50

75 75 86.5 82

3.5 5.5 8 5

1.5 1.5 2 2

0.6 0.6 0.6 0.6

 4T-430209  4T-432209 *4T-430309DX  4T-430309

53.5 53.5 55 55

80 81 96 93

4.5 5.5 9 5

1.5 1.5 2 2

 4T-430210 432210U  4T-430310DX  4T-430310 432310U

58.5 58.5 62 62 62

85 85 105 102 102

4.5 5.5 10 6 9

 4T-430211X 432211U  4T-430311DX 430311XU 432311U

65 65 67 67 67

94 95 113 111 111

 4T-430212X 432212U  4T-430312DX 430312U 432312U

70 70 74 74 74

 4T-430213X 432213U  4T-430313DX 430313XU 432313U  4T-430214 432214U  4T-430314DX 430314XU 432314U

Axial load factors

Mass kg

e

Y1

Y2

Yo

38.5 43 64.5 44.5

0.37 0.37 0.83 0.35

1.80 1.80 0.82 1.96

2.68 2.68 1.22 2.91

1.76 1.76 0.80 1.91

0.929 1.18 1.56 1.61

0.6 0.6 0.6 0.6

42 46 70 47.5

0.40 0.40 0.83 0.35

1.67 1.67 0.82 1.96

2.48 2.48 1.22 2.91

1.63 1.63 0.80 1.91

1.04 1.27 2.11 2.11

1.5 1.5 2 2 2

0.6 0.6 0.6 0.6 0.6

44.5 47.5 75 51 62.5

0.42 0.42 0.83 0.35 0.35

1.61 1.61 0.82 1.96 1.96

2.39 2.39 1.22 2.91 2.91

1.57 1.57 0.80 1.91 1.91

1.18 1.36 2.65 2.72 3.98

4.5 5.5 10.5 6.5 10.5

2 2 2 2 2

0.6 0.6 0.6 0.6 0.6

47 51 83 55.5 66.5

0.40 0.40 0.83 0.35 0.35

1.67 1.67 0.82 1.96 1.96

2.48 2.48 1.22 2.91 2.91

1.63 1.63 0.80 1.91 1.91

1.55 1.85 3.42 3.48 5.05

103 104 124 120 120

4.5 5.5 11.5 7.5 11.5

2 2 2.5 2.5 2.5

0.6 0.6 1 1 1

49.5 56 88.5 59.5 71

0.40 0.40 0.83 0.35 0.35

1.67 1.67 0.82 1.96 1.96

2.48 2.48 1.22 2.91 2.91

1.63 1.63 0.80 1.91 1.91

1.99 2.49 4.22 4.31 6.29

75 75 79 79 79

113 115 133 130 130

4.5 5.5 13 8 12

2 2 2.5 2.5 2.5

0.6 0.6 1 1 1

53.5 61.5 94.5 64 74.5

0.40 0.40 0.83 0.35 0.35

1.67 1.67 0.82 1.96 1.96

2.48 2.48 1.22 2.91 2.91

1.63 1.63 0.80 1.91 1.91

2.49 3.33 5.16 5.32 7.55

80 80 84 84 84

118 119 142 140 140

5 6 13 8 12

2 2 2.5 2.5 2.5

0.6 0.6 1 1 1

57 64.5 101 67 80.5

0.42 0.42 0.83 0.35 0.35

1.61 1.61 0.82 1.96 1.96

2.39 2.39 1.22 2.91 2.91

1.57 1.57 0.80 1.91 1.91

2.67 3.56 6.23 6.37 9.28

B-185

a

Constant

(approx.)


● Double Row Tapered Roller Bearings Back-to-back arrangement B1 C r1 r

φD

φd

a

d 75 ∼ 105mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm d

D

B1

C

75

130 130 160 160 160

62 74 87 87 125

51.5 61.5 59 69 99

80

140 140 170 170 170

64 78 92 92 131

85

150 150 180 180 180

kN rs min1)

r1s min1)

Limiting speeds static min-1

kgf

Cr

Cor

Cr

Cor

grease

oil

2 2 3 3 3

0.6 0.6 1 1 1

238 288 370 435 610

350 445 510 605 935

24 300 29 300 37 500 44 500 62 000

36 000 45 500 52 000 62 000 95 500

2 300 2 300 1 700 2 000 2 000

3 000 3 000 2 300 2 700 2 700

51.5 63.5 61 73 104

2.5 2.5 3 3 3

0.6 0.6 1 1 1

274 340 405 500 680

400 530 565 700 1 050

27 900 35 000 41 500 51 000 69 000

40 500 54 000 58 000 71 500 107 000

2 100 2 100 1 600 1 900 1 900

2 800 2 800 2 200 2 500 2 500

70 86 98 98 137

57 69 65 77 108

2.5 2.5 4 4 4

0.6 0.6 1 1 1

315 385 425 520 690

465 600 585 725 1 050

32 000 39 000 43 000 53 000 70 500

47 000 61 500 59 500 74 000 107 000

2 000 2 000 1 500 1 800 1 800

2 700 2 700 2 100 2 400 2 400

90

160 160 190 190 190

74 94 102 102 144

61 77 69 81 115

2.5 2.5 4 4 4

0.6 0.6 1 1 1

355 450 465 580 770

535 720 645 815 1 190

36 500 46 000 47 500 59 000 78 500

54 500 73 500 65 500 83 000 121 000

1 900 1 900 1 500 1 700 1 700

2 500 2 500 1 900 2 300 2 300

95

170 170 200 200 200

78 100 108 108 151

63 83 85 85 118

3 3 4 3 4

1 1 1 1 1

385 515 630 540 865

580 835 890 735 1 340

39 500 52 500 64 000 55 500 88 000

59 000 85 000 91 000 75 000 137 000

1 800 1 800 1 600 1 600 1 600

2 400 2 400 2 100 2 100 2 100

100

180 180 215 215 215

83 107 112 112 162

67 87 87 87 127

3 3 4 3 4

1 1 1 1 1

440 565 700 590 980

675 925 995 800 1 540

45 000 58 000 71 500 60 000 100 000

68 500 94 500 102 000 81 500 157 000

1 700 1 700 1 500 1 500 1 500

2 200 2 200 2 000 2 000 2 000

105

190 190 225

88 115 116

70 95 91

3 3 3

1 1 1

490 650 625

760 1 080 845

50 000 66 000 63 500

77 500 111 000 86 000

1 600 1 600 1 400

2 100 2 100 1 900

1)Minimum allowable dimension for chamfer dimension r or r1. Note: 1. When incorporating bearings with bearing numbers marked with " * ", please consult NTN Engineering.

B-186


● Double Row Tapered Roller Bearings

Sb r1a Equivalent radial load dynamic Pr=XFr+YFa Fa Fa ≦e Fr Fr >e X Y X Y 1 Y1 0.67 Y2 static Por=Fr+YoFa For values of e, Y2 and Yo see the table below.

ra

φDb

φda

Bearing numbers

Abutment and fillet dimensions

Load center mm

mm

Constant

Axial load factors

Mass kg

da

Db

Sb

ras

r1as

min

min

min

max

max

a

e

Y1

Y2

Yo

(approx.)

4T-430215 432215U 430315DU 430315XU 432315U

85 85 89 89 89

124 125 151 149 149

5 6 14 9 13

2 2 2.5 2.5 2.5

0.6 0.6 1 1 1

61.5 67 107 70.5 87.5

0.44 0.44 0.83 0.35 0.35

1.55 1.55 0.82 1.96 1.96

2.31 2.31 1.22 2.91 2.91

1.52 1.52 0.80 1.91 1.91

2.99 3.68 7.31 7.71 11.5

430216XU 432216XU 430316DU 430316XU 432316U

92 92 94 94 94

132 134 159 159 159

6 7 15.5 9.5 13.5

2 2 2.5 2.5 2.5

0.6 0.6 1 1 1

63 69.5 114 75.5 90.5

0.42 0.42 0.83 0.35 0.35

1.61 1.61 0.82 1.96 1.96

2.39 2.39 1.22 2.91 2.91

1.57 1.57 0.80 1.91 1.91

3.65 4.58 8.99 9.55 13.6

430217XU 432217XU 430317DU 430317XU 432317U

97 97 103 103 103

141 142 169 167 167

6.5 8.5 16.5 10.5 14.5

2 2 3 3 3

0.6 0.6 1 1 1

69 76 121 80 96

0.42 0.42 0.83 0.35 0.35

1.61 1.61 0.82 1.96 1.96

2.39 2.39 1.22 2.91 2.91

1.57 1.57 0.80 1.91 1.91

4.59 5.85 10.6 11.2 15.4

430218U 432218U 430318DU 430318U 432318U

102 102 108 108 108

150 152 180 177 177

6.5 8.5 16.5 10.5 14.5

2 2 3 3 3

0.6 0.6 1 1 1

73 81 127 84 100

0.42 0.42 0.83 0.35 0.35

1.61 1.61 0.82 1.96 1.96

2.39 2.39 1.22 2.91 2.91

1.57 1.57 0.80 1.91 1.91

5.66 7.35 12.5 12.9 18.2

430219XU 432219XU * 430319XU 430319X 432319U

109 109 113 113 113

159 161 186 186 186

7.5 8.5 11.5 11.5 16.5

2.5 2.5 3 3 3

1 1 1 1 1

76.5 86.5 89 88.5 106

0.42 0.42 0.35 0.35 0.35

1.61 1.61 1.96 1.95 1.96

2.39 2.39 2.91 2.90 2.91

1.57 1.57 1.91 1.91 1.91

8.01 9.04 15.0 14.0 21.5

430220XU 432220XU * 430320XU 430320X 432320U

114 114 118 118 118

168 171 200 200 200

8 10 12.5 12.5 17.5

2.5 2.5 3 3 3

1 1 1 1 1

81.5 92 92 93.5 113

0.42 0.42 0.35 0.35 0.35

1.61 1.61 1.96 1.95 1.96

2.39 2.39 2.91 2.90 2.91

1.57 1.57 1.91 1.91 1.91

8.11 10.7 18.4 16.5 26.5

430221XU 432221XU 430321X

119 119 123

178 180 209

9 10 12.5

2.5 2.5 3

1 1 1

86 97.5 96.5

0.42 0.42 0.35

1.61 1.61 1.95

2.39 2.39 2.90

1.57 1.57 1.91

9.73 13.1 19.6

B-187


● Double Row Tapered Roller Bearings Back-to-back arrangement B1 C r1 r

φD

φd

a

d 105 ∼ 140mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm rs min1)

r1s min1)

Cor

grease

oil

1 060 1 470

76 000 97 500

109 000 150 000

1 400 1 400

1 900 1 900

228 298 555 720 825 685 1 070 1 210

340 485 865 1 210 1 180 925 1 660 1 940

23 300 30 500 56 500 73 500 84 000 69 500 109 000 123 000

35 000 49 500 88 500 124 000 120 000 94 500 169 000 197 000

1 600 1 600 1 500 1 500 1 400 1 400 1 400 1 400

2 200 2 200 2 000 2 000 1 800 1 800 1 800 1 800

0.6 0.6 0.6 0.6 1 1 1 1 1

193 230 263 370 595 790 960 800 1 400

298 375 435 610 940 1 360 1 390 1 100 2 270

19 700 23 500 26 800 38 000 60 500 80 500 97 500 81 500 143 000

30 500 38 000 44 500 62 500 96 000 139 000 142 000 112 000 231 000

1 500 1 500 1 500 1 500 1 400 1 400 1 200 1 200 1 200

2 100 2 100 2 000 2 000 1 900 1 900 1 700 1 700 1 700

2.5 2.5 2.5 2.5 4 4 5

0.6 0.6 0.6 0.6 1 1 1.5

224 294 315 410 640 905 1 110

365 490 485 675 1 010 1 630 1 660

22 900 29 900 32 000 42 000 65 500 92 500 113 000

37 500 50 000 49 500 69 000 103 000 166 000 169 000

1 400 1 400 1 400 1 400 1 300 1 300 1 200

1 900 1 900 1 800 1 800 1 700 1 700 1 500

2.5 2.5 3 3 3 4 4 5 4

0.6 0.6 1 1 1 1 1 1.5 1.5

262 300 370 390 640 720 1 050 1 260 1 100

415 535 580 650 970 1 140 1 840 1 900 1 560

26 700 30 500 37 500 40 000 65 500 73 500 107 000 129 000 112 000

42 500 54 500 59 500 66 000 99 000 117 000 188 000 194 000 160 000

1 300 1 300 1 200 1 200 1 200 1 200 1 200 1 100 1 100

1 800 1 800 1 700 1 700 1 600 1 600 1 600 1 400 1 400

D

B1

105

225 225

116 170

91 133

4 3

1 1

110

180 180 200 200 240 240 240 240

56 70 92 121 118 118 181 181

50 56 74 101 93 93 142 142

2.5 2.5 3 3 4 3 3 4

120

180 180 200 200 215 215 260 260 260

46 58 62 78 97 132 128 128 188

41 46 55 62 78 109 101 101 145

200 200 210 210 230 230 280

52 65 64 80 98 145 137

210 210 225 225 250 250 250 300 300

53 66 68 84 102 102 153 145 145

140

min-1

kgf Cr

d

130

C

kN

Limiting speeds static

Cr

Cor

750 955

0.6 0.6 1 1 1 1 1 1

2.5 2.5 2.5 2.5 3 3 4 3 4

46 52 57 64 78.5 117.5 107.5 47 53 61 68 82.5 82.5 125.5 115.5 115.5

1)Minimum allowable dimension for chamfer dimension r or r1. Note: 1. When incorporating bearings with bearing numbers marked with " * ", please consult NTN Engineering.

B-188


● Double Row Tapered Roller Bearings

Sb r1a Equivalent radial load dynamic Pr=XFr+YFa Fa Fa ≦e Fr Fr >e X Y X Y 1 Y1 0.67 Y2 static Por=Fr+YoFa For values of e, Y2 and Yo see the table below.

ra

φDb

φda

Bearing numbers

Abutment and fillet dimensions

Load center mm

mm da

Db

Sb

ras

r1as

min

min

min

max

max

Constant

Axial load factors

Mass kg

a

e

Y1

Y2

Yo

(approx.)

 * 430321XU 432321

123 119

209 208

12.5 18.5

3 2.5

1 1

96.5 117.5

0.35 0.35

1.96 1.96

2.91 2.90

1.91 1.91

21.0 30.2

413122 423122 430222XU 432222XU  * 430322U 430322 432322  * 432322U

122 122 124 124 128 128 128 128

169 166 188 190 222 222 222 222

3 7 9 10 12.5 12.5 19.5 19.5

2 2 2.5 2.5 3 3 3 3

0.6 0.6 1 1 1 1 1 1

66.5 66.5 90 102 100 97.5 124 127

0.40 0.33 0.42 0.42 0.35 0.35 0.35 0.35

1.68 2.03 1.61 1.61 1.96 1.95 1.95 1.96

2.50 3.02 2.39 2.39 2.91 2.90 2.90 2.91

1.64 1.98 1.57 1.57 1.91 1.91 1.91 1.91

5.20 6.38 11.4 15.5 24.5 22.1 35.6 38.2

413024 423024 413124 423124 430224XU 432224XU 430324XU 430324X 432324U

132 132 132 132 134 134 138 138 138

171 170 184 188 203 204 239 239 239

2.5 6 3.5 8 9.5 11.5 13.5 13.5 21.5

2 2 2 2 2.5 2.5 3 3 3

0.6 0.6 0.6 0.6 1 1 1 1 1

59 66 76.5 76.5 98 112 107 106 130

0.37 0.37 0.43 0.37 0.44 0.44 0.35 0.35 0.35

1.80 1.80 1.57 1.80 1.55 1.55 1.96 1.95 1.96

2.69 2.69 2.34 2.69 2.31 2.31 2.91 2.90 2.91

1.76 1.76 1.53 1.76 1.52 1.52 1.91 1.91 1.91

3.85 4.41 7.24 8.96 13.6 18.9 30.5 29.4 47.0

413026 423026 413126 423126 430226XU 432226XU 430326XU

142 142 142 142 148 148 152

186 189 196 198 218 219 255

3 6.5 3.5 8 9.5 13.5 14.5

2 2 2 2 3 3 4

0.6 0.6 0.6 0.6 1 1 1.5

66 71.5 69 79.5 102 124 116

0.37 0.37 0.33 0.37 0.44 0.44 0.35

1.80 1.80 2.03 1.80 1.55 1.55 1.96

2.69 2.69 3.02 2.69 2.31 2.31 2.91

1.76 1.76 1.98 1.76 1.52 1.52 1.91

5.55 6.62 7.83 9.77 15.9 24.1 37.9

413028 423028 413128 423128 430228X  * 430228XU 432228XU  * 430328XU 430328X

152 152 154 154 158 158 158 162 162

199 197 210 209 237 237 238 273 272

3 6.5 3.5 8 9.5 9.5 13.5 14.5 14.5

2 2 2.5 2.5 3 3 3 4 4

0.6 0.6 1 1 1 1 1 1.5 1.5

68.5 75 73.5 88 106 107 131 123 123

0.37 0.37 0.33 0.37 0.43 0.44 0.44 0.35 0.35

1.80 1.84 2.03 1.80 1.57 1.55 1.55 1.96 1.95

2.69 2.74 3.02 2.69 2.34 2.31 2.31 2.91 2.90

1.76 1.80 1.98 1.76 1.53 1.52 1.52 1.91 1.91

5.88 7.11 9.18 11.8 18.0 19.9 30.1 46.6 44.4

B-189


● Double Row Tapered Roller Bearings Back-to-back arrangement B1 C r1 r

φD

φd

a

d 150 ∼ 190mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm rs min1)

Cor

grease

oil

430 630 805 1 040 1 210 2 140 2 140 1 750

27 900 36 000 49 500 61 500 78 500 122 000 144 000 119 000

44 000 64 500 82 000 106 000 123 000 218 000 218 000 178 000

1 200 1 200 1 200 1 200 1 100 1 100 990 990

1 600 1 600 1 500 1 500 1 500 1 500 1 300 1 300

330 430 595 675 900 1 530 1 570 1 290

535 765 965 1 180 1 440 2 840 2 390 1 950

34 000 44 000 60 500 69 000 92 000 156 000 160 000 132 000

54 500 78 000 98 000 120 000 147 000 290 000 244 000 199 000

1 100 1 100 1 100 1 100 1 000 1 000 920 920

1 500 1 500 1 400 1 400 1 400 1 400 1 200 1 200

1 1 1 1 1.5 1.5

365 490 550 725 1 050 1 710

620 865 900 1 270 1 690 3 200

37 000 50 000 56 000 74 000 107 000 174 000

63 500 88 000 92 000 130 000 173 000 325 000

1 100 1 100 1 000 1 000 950 950

1 400 1 400 1 300 1 300 1 300 1 300

3 3 4 4 5 5

1 1 1.5 1.5 1.5 1.5

425 580 705 885 1 080 1 760

735 1 050 1 190 1 530 1 780 3 350

43 000 59 500 72 000 90 500 110 000 180 000

75 000 107 000 121 000 156 000 182 000 345 000

1 000 1 000 940 940 890 890

1 300 1 300 1 300 1 300 1 200 1 200

3 3 4 4 5 5 4

1 1 1.5 1.5 1.5 1.5 1.5

430 615 780 985 1 230 1 970 1 710

740 1 110 1 280 1 710 2 010 3 700 3 350

44 000 63 000 79 500 100 000 125 000 201 000 175 000

75 500 113 000 131 000 174 000 205 000 380 000 340 000

940 940 890 890 840 840 840

1 300 1 300 1 200 1 200 1 100 1 100 1 100

D

B1

150

225 225 250 250 270 270 320 320

56 70 80 100 109 164 154 154

50 56 71 80 87 130 120 120

3 3 3 3 4 4 5 4

160

240 240 270 270 290 290 340 340

60 75 86 108 115 178 160 160

53 60 76 86 91 144 126 126

170

260 260 280 280 310 310

67 84 88 110 125 192

280 280 300 300 320 320 290 290 320 320 340 340 340

190

r1s min1)

min-1

kgf Cr

d

180

C

kN

Limiting speeds static

Cr

Cor

1 1 1 1 1 1 1.5 1.5

274 355 485 600 770 1 200 1 410 1 170

3 3 3 3 4 4 5 4

1 1 1 1 1 1 1.5 1.5

60 67 78 88 97 152

3 3 3 3 5 5

74 93 96 120 127 192

66 74 85 96 99 152

75 94 104 130 133 204 204

67 75 92 104 105 160 160

1)Minimum allowable dimension for chamfer dimension r or r1. Note: 1. When incorporating bearings with bearing numbers marked with " * ", please consult NTN Engineering.

B-190


● Double Row Tapered Roller Bearings

Sb r1a Equivalent radial load dynamic Pr=XFr+YFa Fa Fa ≦e Fr Fr >e X Y X Y 1 Y1 0.67 Y2 static Por=Fr+YoFa For values of e, Y2 and Yo see the table below.

ra

φDb

φda

Bearing numbers

Abutment and fillet dimensions

Load center mm

mm

Constant

Axial load factors

Mass kg

da

Db

Sb

ras

r1as

min

min

min

max

max

a

e

Y1

Y2

Yo

(approx.)

 * 413030 423030 413130 423130 430230U 432230XU  * 430330U 430330

164 164 164 164 168 168 172 172

213 212 231 234 255 254 292 292

3 7 4.5 10 11 17 17 17

2.5 2.5 2.5 2.5 3 3 4 4

1 1 1 1 1 1 1.5 1.5

73.5 79.5 82.5 96.5 114 139 132 135

0.37 0.37 0.33 0.37 0.44 0.44 0.35 0.37

1.80 1.80 2.03 1.80 1.55 1.55 1.96 1.80

2.69 2.69 3.02 2.69 2.31 2.31 2.91 2.69

1.76 1.76 1.98 1.76 1.52 1.52 1.91 1.76

6.66 8.76 14.3 18.0 24.4 37.3 55.4 52.8

413032 423032 413132E1 423132E1 430232U 432232U  * 430332XU 430332X

174 174 174 174 178 178 182 182

227 227 254 250 272 275 310 311

3.5 7.5 5 11 12 17 17 17

2.5 2.5 2.5 2.5 3 3 4 4

1 1 1 1 1 1 1.5 1.5

79 85.5 98.5 106 122 150 138 141

0.37 0.37 0.40 0.37 0.44 0.44 0.35 0.37

1.80 1.80 1.68 1.80 1.55 1.55 1.96 1.80

2.69 2.69 2.50 2.69 2.31 2.31 2.91 2.69

1.76 1.76 1.64 1.76 1.52 1.52 1.91 1.76

8.29 10.7 18.2 22.8 31.9 46.9 65.5 62.4

413034 423034 413134E1 423134E1 430234U 432234XU

184 184 184 184 192 192

242 244 260 260 288 293

3.5 8.5 5 11 14 20

2.5 2.5 2.5 2.5 4 4

1 1 1 1 1.5 1.5

86.5 93.5 104 109 132 160

0.37 0.37 0.40 0.37 0.44 0.44

1.80 1.80 1.68 1.80 1.55 1.55

2.69 2.69 2.50 2.69 2.31 2.31

1.76 1.76 1.64 1.76 1.52 1.52

11.6 14.3 19.5 24.7 38.0 58.2

413036E1 423036E1 413136E1 423136E1 430236U 432236U

194 194 198 198 202 202

260 262 280 279 297 305

4 9.5 5.5 12 14 20

2.5 2.5 3 3 4 4

1 1 1.5 1.5 1.5 1.5

94 102 111 119 139 165

0.37 0.37 0.40 0.37 0.45 0.45

1.80 1.80 1.68 1.80 1.50 1.50

2.69 2.69 2.50 2.69 2.23 2.23

1.76 1.76 1.64 1.76 1.47 1.47

15.9 19.0 24.6 31.4 39.4 60.6

413038E1 423038E1 413138 423138 430238U * 432238U 432238

204 204 208 208 212 212 212

271 272 300 299 316 323 323

4 9.5 6 13 14 22 22

2.5 2.5 3 3 4 4 4

1 1 1.5 1.5 1.5 1.5 1.5

96 104 119 126 141 174 185

0.37 0.37 0.40 0.37 0.44 0.44 0.49

1.80 1.80 1.68 1.80 1.55 1.55 1.38

2.69 2.69 2.50 2.69 2.31 2.31 2.06

1.76 1.76 1.64 1.76 1.52 1.52 1.35

16.2 19.6 30.8 38.6 45.4 73.3 69.8

B-191


● Double Row Tapered Roller Bearings Back-to-back arrangement B1 C r1 r

φD

φd

a

d 200 ∼ 340mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm d

rs min1)

D

B1

310 310 340 340 360 360 360

82 103 112 140 142 218 218

73 82 100 112 110 174 174

3 3 4 4 5 5 4

220

340 340 370 370

90 113 120 150

80 90 107 120

240

360 360 400 400

92 115 128 160

260

400 400 440 440

r1s min1)

min-1

kgf

Cr

Cor

1 1 1.5 1.5 1.5 1.5 1.5

530 720 965 1 090 1 350 2 260 1 980

4 4 5 5

1.5 1.5 1.5 1.5

82 92 114 128

4 4 5 5

104 130 144 180

92 104 128 144

280

420 420 460 460

106 133 146 183

300

460 460 500 500

grease

oil

Cr

Cor

940 1 320 1 660 1 910 2 210 4 250 3 950

54 000 73 000 98 500 111 000 137 000 230 000 201 000

96 000 135 000 169 000 195 000 226 000 435 000 400 000

900 900 840 840 800 800 800

1 200 1 200 1 100 1 100 1 100 1 100 1 100

595 880 1 110 1 220

1 060 1 650 1 920 2 260

61 000 89 500 113 000 125 000

108 000 168 000 196 000 230 000

810 810 760 760

1 100 1 100 1 000 1 000

1.5 1.5 1.5 1.5

655 910 1 230 1 400

1 160 1 770 2 130 2 600

66 500 92 500 126 000 142 000

118 000 181 000 217 000 265 000

730 730 690 690

980 980 920 920

5 5 5 5

1.5 1.5 1.5 1.5

840 1 150 1 500 1 940

1 540 2 190 2 630 3 750

85 500 117 000 152 000 198 000

157 000 223 000 268 000 380 000

670 670 630 630

900 900 840 840

94 106 130 146

5 5 6 6

1.5 1.5 2 2

890 1 200 1 640 1 960

1 630 2 340 2 900 3 650

91 000 123 000 167 000 200 000

166 000 238 000 296 000 375 000

620 620 580 580

820 820 770 770

118 148 160 200

105 118 142 160

5 5 6 6

1.5 1.5 2 2

1 070 1 610 2 010 2 100

1 990 3 150 3 600 4 050

109 000 165 000 205 000 214 000

203 000 320 000 370 000 415 000

570 570 530 530

760 760 710 710

320

480 480 540 540

121 151 176 220

108 121 157 176

5 5 6 6

1.5 1.5 2 2

1 190 1 580 2 240 2 500

2 250 3 100 4 100 4 900

121 000 162 000 228 000 255 000

229 000 315 000 415 000 500 000

530 530 500 500

710 710 660 660

340

520

133

118

6

2

1 480

2 870

150 000

293 000

500

660

200

C

kN

Limiting speeds static

1)Minimum allowable dimension for chamfer dimension r or r1. Note: 1. When incorporating bearings with bearing numbers marked with " * ", please consult NTN Engineering.

B-192


● Double Row Tapered Roller Bearings

Sb r1a Equivalent radial load dynamic Pr=XFr+YFa Fa Fa ≦e Fr Fr >e X Y X Y 1 Y1 0.67 Y2 static Por=Fr+YoFa For values of e, Y2 and Yo see the table below.

ra

φDb

φda

Bearing numbers

Abutment and fillet dimensions

Load center mm

mm da

Db

Sb

ras

r1as

min

min

min

max

max

a

Constant

Axial load factors

Mass kg

e

Y1

Y2

Yo

(approx.)

413040E1 423040E1 413140 423140 430240U  * 432240U 432240

214 214 218 218 222 222 222

288 291 320 316 336 340 340

4.5 10.5 6 14 16 22 22

2.5 2.5 3 3 4 4 4

1 1 1.5 1.5 1.5 1.5 1.5

101 112 125 134 154 180 193

0.37 0.37 0.40 0.37 0.44 0.41 0.49

1.80 1.80 1.68 1.80 1.55 1.66 1.38

2.69 2.69 2.50 2.69 2.31 2.47 2.06

1.76 1.76 1.64 1.76 1.52 1.62 1.35

20.6 25.7 38.6 47.5 62.8 95.2 90.7

413044E1 423044E1 413144 423144

238 238 242 242

318 319 346 341

5 11.5 6.5 15

3 3 4 4

1.5 1.5 1.5 1.5

112 125 135 154

0.37 0.37 0.40 0.40

1.80 1.80 1.68 1.68

2.69 2.69 2.50 2.50

1.76 1.76 1.64 1.64

26.7 33.3 47.8 59.6

413048E1 423048E1 413148 423148

258 258 262 262

339 340.5 375 373

5 11.5 7 16

3 3 4 4

1.5 1.5 1.5 1.5

117 131 144 164

0.37 0.37 0.40 0.40

1.80 1.80 1.68 1.68

2.69 2.69 2.50 2.50

1.76 1.76 1.64 1.64

30.2 36.3 58.9 71.7

413052 423052 413152 423152

282 282 282 282

372 374 412 413

6 13 8 18

4 4 4 4

1.5 1.5 1.5 1.5

131 143 161 176

0.37 0.37 0.40 0.40

1.80 1.80 1.68 1.68

2.69 2.69 2.50 2.50

1.76 1.76 1.64 1.64

41.5 53.0 82.2 101

413056 423056 413156 423156

302 302 308 308

394 397 435 433

6 13.5 8 18.5

4 4 5 5

1.5 1.5 2 2

136 148 168 177

0.37 0.37 0.40 0.40

1.80 1.80 1.68 1.68

2.69 2.69 2.50 2.50

1.76 1.76 1.64 1.64

47.2 57.3 87.4 109

413060 423060 413160 423160

322 322 328 328

428 434 471 464

6.5 15 9 20

4 4 5 5

1.5 1.5 2 2

151 163 182 202

0.37 0.37 0.40 0.40

1.80 1.80 1.68 1.68

2.69 2.69 2.50 2.50

1.76 1.76 1.64 1.64

65.6 80.2 115 144

413064 423064 413164 423164

342 342 348 348

449 455 505 502

6.5 15 9.5 22

4 4 5 5

1.5 1.5 2 2

157 170 197 217

0.37 0.37 0.40 0.40

1.80 1.80 1.68 1.68

2.69 2.69 2.50 2.50

1.76 1.76 1.64 1.64

70.9 85.4 150 188

413068

368

488

7.5

5

2

170

0.37

1.8

2.69

1.76

89.2

B-193


● Double Row Tapered Roller Bearings Back-to-back arrangement B1 C r1 r

φD

φd

a

d 340 ∼ 480mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm C

kN rs min1)

d

D

B1

340

520 580 580

165 190 238

133 169 190

6 6 6

360

540 540 600 600

134 169 192 240

120 134 171 192

380

560 560 620 620

135 171 194 243

400

600 600 650 650

r1s min1)

Limiting speeds static min-1

kgf

Cr

Cor

2 2 2

1 890 2 690 3 350

6 6 6 6

2 2 2 2

122 135 173 194

6 6 6 6

148 185 200 250

132 148 178 200

420

620 620 700 700

150 188 224 280

440

650 650 720 720

grease

oil

Cr

Cor

3 750 4 900 6 500

193 000 274 000 345 000

380 000 500 000 660 000

500 460 460

660 620 620

1 470 2 050 2 720 3 200

2 810 4 200 5 050 6 500

150 000 209 000 277 000 325 000

287 000 430 000 515 000 660 000

460 460 430 430

620 620 580 580

2 2 2 2

1 690 2 080 2 840 3 350

3 350 4 350 5 250 6 700

172 000 213 000 289 000 340 000

340 000 445 000 535 000 685 000

440 440 410 410

580 580 540 540

6 6 6 6

2 2 3 3

1 860 2 530 3 000 3 750

3 700 5 450 5 800 7 850

190 000 258 000 305 000 385 000

375 000 555 000 590 000 800 000

410 410 380 380

550 550 510 510

134 150 200 224

6 6 6 6

2 2 3 3

2 110 2 650 3 700 4 800

4 250 5 900 7 200 9 700

215 000 270 000 375 000 490 000

435 000 600 000 735 000 990 000

390 390 360 360

520 520 480 480

157 196 226 283

140 157 201 226

6 6 6 6

3 3 3 3

2 470 2 600 4 000 5 000

5 150 5 450 7 800 10 300

252 000 266 000 410 000 510 000

525 000 560 000 795 000 1 050 000

370 370 340 340

490 490 460 460

460

680 680 760 760

163 204 240 300

145 163 214 240

6 6 7.5 7.5

3 3 4 4

2 600 3 050 4 550 4 900

5 350 6 600 9 150 10 300

265 000 310 000 465 000 500 000

550 000 670 000 930 000 1 050 000

350 350 320 320

470 470 430 430

480

700 700 790 790

165 206 248 310

147 165 221 248

6 6 7.5 7.5

3 3 4 4

2 490 3 050 4 800 5 300

5 000 6 700 9 600 11 100

254 000 310 000 490 000 540 000

510 000 685 000 975 000 1 130 000

330 330 310 310

450 450 410 410

1)Minimum allowable dimension for chamfer dimension r or r1.

B-194


● Double Row Tapered Roller Bearings

Sb r1a Equivalent radial load dynamic Pr=XFr+YFa Fa Fa ≦e Fr Fr >e X Y X Y 1 Y1 0.67 Y2 static Por=Fr+YoFa For values of e, Y2 and Yo see the table below.

ra

φDb

φda

Bearing numbers

Abutment and fillet dimensions

Load center mm

mm da

Db

Sb

ras

r1as

min

min

min

max

max

a

Constant

Axial load factors

Mass kg

e

Y1

Y2

Yo

(approx.)

 423068  413168  423168

368 368 368

489 548 542

16 10.5 24

5 5 5

2 2 2

184 213 237

0.37 0.40 0.40

1.80 1.68 1.68

2.69 2.50 2.50

1.76 1.64 1.64

113 188 235

 413072  423072  413172  423172

388 388 388 388

507 509 561 560

7 17.5 10.5 24

5 5 5 5

2 2 2 2

176 192 219 240

0.37 0.37 0.40 0.40

1.80 1.80 1.68 1.68

2.69 2.69 2.50 2.50

1.76 1.76 1.64 1.64

92.7 120 199 248

 413076  423076  413176  423176

408 408 408 408

528 529 583 578

6.5 18 10.5 24.5

5 5 5 5

2 2 2 2

183 196 225 249

0.37 0.37 0.40 0.40

1.80 1.80 1.68 1.68

2.69 2.69 2.50 2.50

1.76 1.76 1.64 1.64

95.9 126 210 262

 413080  423080  413180  423180

428 428 428 428

564 564 610 610

8 18.5 11 25

5 5 5 5

2 2 2.5 2.5

194 210 232 256

0.37 0.37 0.40 0.40

1.80 1.80 1.68 1.68

2.69 2.69 2.50 2.50

1.76 1.76 1.64 1.64

105 163 236 294

 413084  423084  413184  423184

448 448 448 448

586 583 655 659

8 19 12 28

5 5 5 5

2 2 2.5 2.5

200 220 258 287

0.37 0.37 0.40 0.40

1.80 1.80 1.68 1.68

2.69 2.69 2.50 2.50

1.76 1.76 1.64 1.64

135 172 317 394

 413088  423088  413188  423188

468 468 468 468

614 614 675 678

8.5 19.5 12.5 28.5

5 5 5 5

2.5 2.5 2.5 2.5

208 229 263 288

0.37 0.37 0.40 0.40

1.80 1.80 1.68 1.68

2.69 2.69 2.50 2.50

1.76 1.76 1.64 1.64

160 198 330 412

 413092  423092  413192  423192

488 488 496 496

646 644 714 712

9 20.5 13 30

5 5 6 6

2.5 2.5 3 3

217 239 276 305

0.37 0.37 0.40 0.40

1.80 1.80 1.68 1.68

2.69 2.69 2.50 2.50

1.76 1.76 1.64 1.64

179 225 395 493

 413096  423096  413196  423196

508 508 516 516

665 664 743 738

9 20.5 13.5 31

5 5 6 6

2.5 2.5 3 3

223 246 281 329

0.37 0.37 0.40 0.40

1.80 1.80 1.68 1.68

2.69 2.69 2.50 2.50

1.76 1.76 1.64 1.64

189 236 442 548

B-195


● Double Row Tapered Roller Bearings Back-to-back arrangement B1 C r1 r

φD

φd

a

d 500mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm d

D

B1

500

720 720 830 830

167 209 264 330

C

149 167 235 264

kN rs min1)

6 6 7.5 7.5

r1s min1)

3 3 4 4

Cor

2 610 3 050 5 200 6 400

5 400 6 900 10 500 14 000

B-196

min-1

kgf

Cr

1)Minimum allowable dimension for chamfer dimension r or r1.

Limiting speeds static

Cr

266 000 315 000 530 000 650 000

Cor

550 000 700 000 1 070 000 1 420 000

grease

320 320 290 290

oil

420 420 390 390


● Double Row Tapered Roller Bearings

Sb r1a Equivalent radial load dynamic Pr=XFr+YFa Fa Fa ≦e Fr Fr >e X Y X Y 1 Y1 0.67 Y2 static Por=Fr+YoFa For values of e, Y2 and Yo see the table below.

ra

φDb

φda

Bearing numbers

Abutment and fillet dimensions

Load center mm

mm

4130/500 4230/500 4131/500  5E-4231/500G2

da

Db

Sb

ras

r1as

min

min

min

max

max

5 5 6 6

2.5 2.5 3 3

528 528 536 536

686 683 780 773

9 21 14.5 33

B-197

a

230 250 296 331

Constant

Axial load factors

Mass kg

e

Y1

Y2

0.37 0.37 0.40 0.40

1.80 1.80 1.68 1.68

2.69 2.69 2.50 2.50

Yo

1.76 1.76 1.64 1.64

(approx.)

202 247 528 678


● Double Row Tapered Roller Bearings Face-to-face arrangement C1 r r1 B φD

φd

a

d 110 ∼ 280mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm

kN r1s min1)

rs min1)

56

2.5

46 62

46 62

200 210

52 64

140

210 225

150

Limiting speeds static min-1

kgf

grease

oil

49 500

1 600

2 200

23 500 38 000

38 000 62 500

1 500 1 500

2 100 2 000

490 675

29 900 42 000

50 000 69 000

1 400 1 400

1 900 1 800

300 390

535 650

30 500 40 000

54 500 66 000

1 300 1 200

1 800 1 700

2.5 2.5

355 600

630 1 040

36 000 61 500

64 500 106 000

1 200 1 200

1 600 1 500

3 3

2.5 2.5

430 675

765 1 180

44 000 69 000

78 000 120 000

1 100 1 100

1 500 1 400

67 88

3 3

2.5 2.5

490 725

865 1 270

50 000 74 000

88 000 130 000

1 100 1 000

1 400 1 300

74 96

74 96

3 4

2.5 3

580 885

1 050 1 530

59 500 90 500

107 000 156 000

1 000 940

1 300 1 300

290 320

75 104

75 104

3 4

2.5 3

615 985

1 110 1 710

63 000 100 000

113 000 174 000

940 890

1 300 1 200

200

310 340

82 112

82 112

3 4

2.5 3

720 1 090

1 320 1 910

73 000 111 000

135 000 195 000

900 840

1 200 1 100

220

340 370

90 120

90 120

4 5

3 4

880 1 220

1 650 2 260

89 500 125 000

168 000 230 000

810 760

1 100 1 000

240

360 400

92 128

92 128

4 5

3 4

910 1 400

1 770 2 600

92 500 142 000

181 000 265 000

730 690

980 920

260

400 440

104 144

104 144

5 5

4 4

1 150 1 960

2 190 3 750

117 000 200 000

223 000 380 000

670 630

900 840

280

420

106

106

5

4

1 200

2 340

123 000

238 000

620

820

d

D

B

C1

Cr

Cor

Cr

110

180

56

2

298

485

30 500

120

180 200

2.5 2.5

2 2

230 370

375 610

130

52 64

2.5 2.5

2 2

294 410

53 68

53 68

2.5 3

2 2.5

225 250

56 80

56 80

3 3

160

240 270

60 86

60 86

170

260 280

67 88

180

280 300

190

1)Minimum allowable dimension for chamfer dimension r or r1.

B-198

Cor


● Double Row Tapered Roller Bearings

Sa

ra Equivalent radial load dynamic Pr=XFr+YFa Fa Fa ≦e Fr Fr >e X Y X Y 1 Y1 0.67 Y2 static Por=Fr+YoFa For values of e, Y2 and Yo see the table below.

r1a

φDa

φda

Bearing numbers

Abutment and fillet dimensions

Load Constant center mm

mm da

Da

Sa

r1as

ras

Mass kg

e

Y1

Y2

Yo

(approx.)

1

0.33

2.03

3.02

1.98

5.6

2 2

12 6.5

0.37 0.37

1.80 1.80

2.69 2.69

1.76 1.76

4.08 7.82

2 2

2 2

13.5 7.5

0.37 0.37

1.80 1.80

2.69 2.69

1.76 1.76

5.92 8.58

8 10

2 2.5

2 2

10 8

0.37 0.37

1.84 1.80

2.74 2.69

1.80 1.76

6.4 10.7

205 220

10 10

2.5 2.5

2 2

15.5 6.5

0.37 0.37

1.80 1.80

2.69 2.69

1.76 1.76

7.76 15.7

228 258

215 240

10 10

2.5 2.5

2 2

17.5 8

0.37 0.37

1.80 1.80

2.69 2.69

1.76 1.76

9.46 20

185 188

248 268

235 250

10 10

2.5 2.5

2 2

18 8.5

0.37 0.37

1.80 1.80

2.69 2.69

1.76 1.76

12.8 21.5

323036E1 323136E1

198 200

268 286

250 265

10 12

2.5 3

2 2.5

17 8

0.37 0.37

1.80 1.80

2.69 2.69

1.76 1.76

16.5 27.2

323038E1 323138

208 212

278 306

260 285

12 12

2.5 3

2 2.5

17.5 8.5

0.37 0.37

1.80 1.80

2.69 2.69

1.76 1.76

17.9 34

323040E1 323140

218 222

298 326

280 300

12 12

2.5 3

2 2.5

19 8.5

0.37 0.37

1.80 1.80

2.69 2.69

1.76 1.76

21.7 41.7

323044E1 323144

242 248

326 352

310 325

12 14

3 4

2.5 3

21.5 14

0.37 0.40

1.80 1.68

2.69 2.50

1.76 1.64

29.8 52.2

323048E1 323148

269 268

346 382

321.5 355

14 14

3 4

2.5 3

25.5 17

0.37 0.40

1.80 1.68

2.69 2.50

1.76 1.64

32.6 64.6

323052 323152

285 290

382 422

365 385

14 16

4 4

3 3

25 16.5

0.37 0.40

1.80 1.68

2.69 2.50

1.76 1.64

47.3 90

323056

305

402

385

16

4

3

29.5

0.37

1.80

2.69

1.76

51.2

max

max

min

min

max

max

323122

124

170

160

8

2

2

323024 323124

134 134

170 190

164 175

8 8

2 2

323026 323126

144 144

190 200

184 185

8 8

323028 323128

155 156

200 213

190 200

323030 323130

165 168

213 238

323032 323132E1

175 178

323034 323134E1

B-199

a

Axial load factors


● Double Row Tapered Roller Bearings Face-to-face arrangement C1 r r1 B φD

φd

a

d 280 ∼ 500mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm

kN r1s min1)

rs min1)

146

6

5

1 940

118 160

118 160

5 6

4 5

480 540

121 176

121 176

5 6

340

520 580

133 190

133 190

360

540 600

134 192

380

560 620

400

d

D

B

280

460

146

300

460 500

320

C1

Cr

Limiting speeds static min-1

kgf Cor

grease

oil

Cr

Cor

3 650

198 000

375 000

580

770

1 610 2 100

3 150 4 050

165 000 214 000

320 000 415 000

570 530

760 710

4 5

1 580 2 500

3 100 4 900

162 000 255 000

315 000 500 000

530 500

710 660

6 6

5 5

1 890 3 350

3 750 6 500

193 000 345 000

380 000 660 000

500 460

660 620

134 192

6 6

5 5

2 050 3 200

4 200 6 500

209 000 325 000

430 000 660 000

460 430

620 580

135 194

135 194

6 6

5 5

2 080 3 350

4 350 6 700

213 000 340 000

445 000 685 000

440 410

580 540

600 650

148 200

148 200

6 6

5 6

2 530 3 750

5 450 7 850

258 000 385 000

555 000 800 000

410 380

550 510

420

620 700

150 224

150 224

6 6

5 6

2 650 4 800

5 900 9 700

270 000 490 000

600 000 990 000

390 360

520 480

440

650 720

157 226

157 226

6 6

6 6

2 600 5 000

5 450 10 300

266 000 510 000

560 000 1 050 000

370 340

490 460

460

680 760

163 240

163 240

6 7.5

6 7.5

3 050 4 900

6 600 10 300

310 000 500 000

670 000 1 050 000

350 320

470 430

480

700 790

165 248

165 248

6 7.5

6 7.5

3 050 5 300

6 700 11 100

310 000 540 000

685 000 1 130 000

330 310

450 410

500

720 830

167 264

167 264

6 7.5

6 7.5

3 050 6 400

6 900 14 000

315 000 650 000

700 000 1 420 000

320 290

420 390

1)Minimum allowable dimension for chamfer dimension r or r1.

B-200


● Double Row Tapered Roller Bearings

Sa

ra Equivalent radial load dynamic Pr=XFr+YFa Fa Fa ≦e Fr Fr >e X Y X Y 1 Y1 0.67 Y2 static Por=Fr+YoFa For values of e, Y2 and Yo see the table below.

r1a

φDa

φda

Bearing numbers

Abutment and fillet dimensions

Load Constant center mm

mm da

Da

Sa

r1as

ras

min

max

max

Mass kg

e

Y1

Y2

Yo

16

0.40

1.68

2.50

1.64

95.8

3 4

31 18

0.37 0.40

1.80 1.68

2.69 2.50

1.76 1.64

70.7 126

4 5

3 4

34 18.5

0.37 0.40

1.80 1.68

2.69 2.50

1.76 1.64

76.3 164

18 18

5 5

4 4

36 35.5

0.37 0.40

1.80 1.68

2.69 2.50

1.76 1.64

101 207

495 535

18 18

5 5

4 4

41 25.5

0.37 0.40

1.80 1.68

2.69 2.50

1.76 1.64

107 218

538 598

515 550

18 20

5 5

4 4

44.5 29

0.37 0.40

1.80 1.68

2.69 2.50

1.76 1.64

113 229

440 445

578 622

550 580

18 20

5 5

4 5

45 32.5

0.37 0.40

1.80 1.68

2.69 2.50

1.76 1.64

146 259

323084 323184

460 465

598 672

570 625

20 25

5 5

4 5

48.5 60

0.37 0.40

1.80 1.68

2.69 2.50

1.76 1.64

154 346

323088 323188

480 485

622 692

600 645

20 25

5 5

5 5

53.5 44

0.37 0.40

1.80 1.68

2.69 2.50

1.76 1.64

177 361

323092 323192

500 525

652 724

620 660

25 25

5 6

5 6

56.5 34.5

0.37 0.40

1.80 1.68

2.69 2.50

1.76 1.64

201 431

323096 323196

520 547.5

672 754

640 688.5

25 30

5 6

5 6

63 36

0.37 0.40

1.80 1.68

2.69 2.50

1.76 1.64

211 478

540 550

692 794

655 740

25 30

5 6

5 6

61.5 37.5

0.37 0.40

1.80 1.68

2.69 2.50

1.76 1.64

221 570

max

max

min

323156

315

438

400

16

5

4

323060 323160

330 335

442 478

425 440

16 16

4 5

323064 323164

350 355

462 518

440 480

16 18

323068 323168

370 380

498 558

480 515

323072 323172

395 400

518 578

323076 323176

415 420

323080 323180

3230/500 5E-3231/500G2

B-201

a

Axial load factors

(approx.)


● Four Row Tapered Roller Bearings

C2 r r1 B2

φD φDa

φd φda

Sa

d 120 ∼ 187.325mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm d

D

B2

kN C2

r1s min1)

rs min1)

Cr

static kgf

Cor

Cr

Cor

120

170 210

124 174

124 174

2.5 2.5

2 2.5

390 855

1 020 1 710

40 000 87 500

104 000 174 000

120.650

174.625

141.288

139.703

0.8

1.5

510

1 220

52 000

124 000

127

182.562

158.750

158.750

1.5

3.3

660

1 730

67 000

177 000

130

184

134

134

2.5

2

480

1 190

49 000

122 000

135

180

160

160

1

2

500

1 360

51 000

138 000

136.525

190.500

161.925

161.925

1.5

3.3

695

1 900

71 000

193 000

139.700

200.025

157.165

160.340

0.8

3.3

700

1 950

71 500

199 000

140

198

144

144

2.5

2

575

1 460

58 500

149 000

146.050

244.475

192.088

187.325

1.5

3.3

955

1 980

97 000

202 000

150

212

155

155

3

2.5

660

1 700

67 500

173 000

152.400

222.250

174.625

174.625

1.5

1.5

930

2 350

94 500

239 000

160

226 265

165 173

165 173

3 2.5

2.5 2.5

775 1 100

2 030 2 270

79 000 112 000

207 000 231 000

165.100

225.425

165.100

168.275

0.8

3.3

745

2 220

76 000

226 000

170

240 280

175 181

175 181

3 2.5

2.5 2.5

835 1 150

2 200 2 420

85 500 117 000

224 000 247 000

177.800

247.650 279.400 304.800

192.088 234.950 238.227

192.088 234.947 233.365

1.5 1.5 3.3

3.3 3.3 3.3

1 000 1 420 1 580

2 760 3 400 3 100

102 000 145 000 161 000

281 000 345 000 320 000

180

254 300

185 280

185 280

3 3

2.5 3

910 2 160

2 390 4 800

93 000 220 000

244 000 490 000

187.325

269.875

211.138

211.138

1.5

3.3

1 240

3 400

127 000

345 000

1)Minimum allowable dimension for chamfer dimension r or r1.

B-202


● Four Row Tapered Roller Bearings

Bearing numbers

Abutment and fillet dimensions

Mass

mm

kg

da

Da

Sa

(approx.)

  E-625924   E-CRO-2418

135 140

155.5 190

5 4.5

8.97 22.2

 * E-M224749D/M224710/M224710D

129

163

3

11.5

* T-E-48290D/48220/48220D

137

168

4.5

14.3

  E-625926

144.5

169

5

11.3

  E-CRO-2701

143

165

2

13.5

* T-E-48393D/48320/48320D

144

177

4

14.8

* T-E-48680D/48620/48620D

150

185

3

17.3

  E-625928

156

183

5

14

 * E-81576D/81962/81963D

163

225

6.5

36.8

  E-625930

167.5

195

5.5

16.9

* T-E-M231649D/M231610/M231610D

165

207

4

24.7

  E-625932   E-CRO-3209

177.5 184

208.5 247

5.5 4.5

20.2 33.6

* T-E-46791D/46720/46721D

175

209

3

20.7

  E-625934   E-CRO-3409

187.5 192

220 255

5.5 5

24.4 44

 * E-67791D/67720/67721D  * E-82681D/82620/82620D  * E-EE280700D/281200/281201D

190 195 198

229 251 279

5 5 7

29.4 55.3 69.9

  E-625936   E-CRO-3617

200.5 201

233.5 274

5.5 5

28.9 69.4

 * E-M238849D/M238810/M238810D

199.9

250

4

41.8

Note: 1. Bearing numbers marked " * " designate inch series bearings.

B-203


● Four Row Tapered Roller Bearings

C2 r r1 B2

φD φDa

φd φda

Sa

d 190 ∼ 260mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm

kN

static kgf

r1s min1)

rs min1)

Cr

196 190 225.425

3 2.5 1.5

2.5 2.5 3.3

1 060 1 080 1 570

2 850 2 940 4 150

108 000 111 000 160 000

291 000 300 000 425 000

187.325

188.912

1.5

3.3

1 040

2 990

106 000

305 000

282 290 310

206 160 200

206 160 200

3 2.5 3

2.5 2.5 3

1 200 925 1 360

3 300 2 210 2 980

122 000 94 500 138 000

335 000 226 000 305 000

203.200

317.500

215.900

209.550

3.3

3.3

1 270

2 820

129 000

288 000

215.900

288.925

177.800

177.800

0.8

3.3

1 090

3 100

111 000

315 000

220

310

226

226

4

3

1 380

3 800

141 000

385 000

220.662

314.325

239.712

239.712

1.5

3.3

1 840

4 900

187 000

500 000

228.600

425.450

349.250

361.950

3.5

6.4

3 450

8 250

355 000

845 000

234.950

327.025

196.850

196.850

1.5

3.3

1 370

3 700

140 000

380 000

240

338

248

248

4

3

1 870

4 950

191 000

505 000

241.478

350.838

228.600

228.600

1.5

3.3

1 610

4 000

164 000

410 000

244.475

327.025 381.000

193.675 304.800

193.675 304.800

1.5 3.3

3.3 4.8

1 430 2 220

4 100 5 750

146 000 227 000

415 000 590 000

250

365 370

270 220

270 220

1.5 4

3 4

2 150 2 050

6 150 5 750

219 000 209 000

630 000 590 000

254

358.775 368.300 444.500

269.875 204.622 279.400

269.875 204.470 279.400

3.3 1.5 3.3

3.3 3.3 6.4

2 390 1 350 2 890

6 550 3 250 5 900

244 000 138 000 294 000

670 000 330 000 600 000

260

368 400

268 255

268 255

5 4

4 7.5

1 990 2 210

5 700 5 300

203 000 225 000

580 000 540 000

d

D

B2

190

268 270 292.100

196 190 225.425

190.500

266.700

200

C2

1)Minimum allowable dimension for chamfer dimension r or r1.

B-204

Cor

Cr

Cor


● Four Row Tapered Roller Bearings

Bearing numbers

Abutment and fillet dimensions

Mass

mm

kg

da

Da

  E-625938   E-CRO-3812  * E-M241538D/M241510/M241510D

209 205 222

245.5 250 271

6 6 5

34.7 34.7 59.6

* T-E-67885D/67820/67820D

204

246

3

33.6

  E-625940   E-CRO-4013   E-CRO-4014

219.5 221 222

258 271 284

6 5 6

40.5 35.1 48.4

 * E-EE132082D/132125/132126D

224

294

9.5

62.5

 * E-LM742749D/LM742714/LM742714D

227

267

5

34.3

  E-625944

242

284.5

6

53.5

* T-E-M244249D/M244210/M244210D

235

293

4

60.2

 * E-EE700090D/700167/700168D

263

381

3

* T-E-8576D/8520/8520D

250

305

5

53.6

  E-625948A

260.5

312

6

70

 * E-EE127097D/127137/127137D

262

325

6.5

76.4

 * E-LM247748D/LM247710/LM247710DA  * E-EE126096D/126150/126151D

257 262

310 343

5 6.5

46.1 132

  E-CRO-5004   E-CRO-5001

275 276

339 344

5 6

82.1 87

* T-E-M249748D/M249710/M249710D  * E-EE171000D/171450/171451D  * E-EE822101D/822175/822176D

272.5 269 289

335 340 406

5 6 8

85.6 71.8 185

  E-625952   E-CRO-5215

287 290

338.5 359

6 8

90.3 106

Note: 1. Bearing numbers marked " * " designate inch series bearings.

B-205

Sa

(approx.)

232


● Four Row Tapered Roller Bearings

C2 r r1 B2

φD φDa

φd φda

Sa

d 260.350 ∼ 304.800mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm

kN

static kgf

r1s min1)

rs min1)

Cr

228.600 253.995 317.500

3.3 1.5 6.4

6.4 6.4 3.3

1 750 2 090 2 980

4 550 4 950 7 100

178 000 213 000 305 000

465 000 505 000 725 000

230.188 269.878

228.600 269.878

1.5 3.3

3.3 6.4

1 840 2 110

5 350 6 000

188 000 216 000

545 000 610 000

381.000

282.575

282.575

3.3

3.3

2 470

6 850

252 000

700 000

270

410

222

222

4

4

1 910

4 550

195 000

465 000

275

385

200

200

3

3

1 610

4 250

165 000

435 000

276.225

406.400

268.290

260.355

1.5

6.4

2 110

6 000

216 000

610 000

279.400

469.900

346.075

349.250

6.4

3.3

3 500

8 700

355 000

885 000

279.578

380.898

244.475

244.475

1.5

3.3

1 950

6 200

199 000

635 000

280

395

288

288

5

4

2 560

7 100

261 000

725 000

285.750

380.898

244.475

244.475

1.5

3.3

1 950

6 200

199 000

635 000

288.925

406.400

298.450

298.450

3.3

3.3

2 980

8 300

305 000

850 000

292.100

476.250

296.047

292.100

1.5

3.3

3 050

6 800

310 000

695 000

300

424 460 470 470

310 360 270 292

310 360 270 292

5 4 4 4

4 4 4 4

2 570 4 050 3 200 3 500

7 450 10 100 7 250 8 300

262 000 415 000 325 000 360 000

760 000 1 030 000 740 000 845 000

300.038

422.275

311.150

311.150

3.3

3.3

3 350

9 600

340 000

980 000

304.648

438.048 438.048

279.400 280.990

279.400 279.400

3.3 3.3

3.3 4.8

2 470 2 630

6 500 6 900

252 000 268 000

665 000 700 000

304.800

419.100 444.500

269.875 247.650

269.875 241.300

1.5 8

6.4 1.5

2 390 1 850

6 850 4 600

244 000 188 000

695 000 470 000

d

D

B2

260.350

365.125 400.050 422.275

228.600 255.588 314.325

266.700

355.600 393.700

269.875

C2

1)Minimum allowable dimension for chamfer dimension r or r1.

B-206

Cor

Cr

Cor


● Four Row Tapered Roller Bearings

Bearing numbers

Abutment and fillet dimensions

Mass

mm

kg

da

Da

Sa

(approx.)

 * E-EE134102D/134143/134144D  * E-EE221027D/221575/221576D  * E-HM252349D/HM252310/HM252310D

282 292 290

340 367 392

6.5 8 5.5

76.5 117 180

* T-E-LM451349D/LM451310/LM451310D  * E-EE275106D/275155/275156D

281 292

335 367

6.5 5

62 116

 * E-M252349D/M252310/M252310D

290

356

6

97.5

  E-CRO-5403

305

382

6

91

  E-CRO-5501

300

355

6

62.5

 * E-EE275109D/275160/275161D

293.6

366

8

122

 * E-EE722111D/722185/722186D

316

432

5

258

* T-E-LM654644D/LM654610/LM654610D

297

356

5

  E-625956

304.5

363.5

7

* T-E-LM654648D/LM654610/LM654610D

302

356

5

 * E-M255449D/M255410/M255410DA

310

379

5

125

 * E-EE921150D/921875/921876D

321

441

7

208

  E-625960   E-CRO-6015  ☆ E-CRO-6012  ☆ E-CRO-6013

329 330 338 336

389.5 427 438 437

7 10 7 7

138 180 152 164

☆* T-E-HM256849D/HM256810/HM256810DG2

322

394

6

143

 * E-EE329119D/329172/329173D  * E-M757448D/M757410/M757410D

328 328

409 407

8 7

143 140

 * E-M257149D/M257110/M257110D  * E-EE291202D/291750/291751D

322 328

392 416

5 9.5

115 127

Note: 1. Bearing numbers marked " * " designate inch series bearings. 2. Bearing numbers marked " ☆ " designate bearing with hollow rollers and pin type cages.

B-207

83.2 111 82.5


● Four Row Tapered Roller Bearings

C2 r r1 B2

φD φDa

φd φda

Sa

d 304.800 ∼ 360mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm

kN

static kgf

r1s min1)

rs min1)

Cr

349.250

3.3

6.4

3 650

9 400

370 000

960 000

266.700

266.700

3.3

3.3

2 610

7 450

267 000

760 000

438.048

280.990

279.400

3.3

4.8

2 630

6 900

268 000

700 000

317.500

422.275 447.675

269.875 327.025

269.875 327.025

1.5 3.3

3.3 3.3

2 260 3 400

7 050 9 550

231 000 345 000

715 000 975 000

320

460

338

338

5

4

2 940

8 650

300 000

880 000

330

470 510

340 340

340 340

2.5 6

2.5 6

3 150 3 900

10 200 9 650

320 000 395 000

1 040 000 985 000

330.200

482.600

306.388

311.150

1.5

3.3

2 810

7 900

287 000

805 000

333.375

469.900

342.900

342.900

3.3

3.3

4 000

11 000

405 000

1 130 000

340

480

350

350

6

5

3 450

10 400

350 000

1 060 000

341.312

457.098

254.000

254.000

1.5

3.3

2 370

6 900

241 000

705 000

342.900

533.400

307.985

301.625

3.3

3.3

3 150

6 900

320 000

705 000

343.052

457.098

254.000

254.000

1.5

3.3

2 370

6 900

241 000

705 000

346.075

488.950

358.775

358.775

3.3

3.3

4 350

12 800

445 000

1 300 000

347.662

469.900

292.100

292.100

3.3

3.3

3 200

9 100

325 000

925 000

355

490

316

316

1.5

3.3

3 500

10 000

355 000

1 020 000

355.600

444.500 457.200 482.600 488.950

241.300 252.412 265.112 317.500

241.300 252.412 269.875 317.500

1.5 1.5 1.5 1.5

3.3 3.3 3.3 3.3

1 760 2 470 2 790 3 500

6 200 7 850 7 650 10 000

180 000 251 000 285 000 355 000

635 000 800 000 780 000 1 020 000

360

508 600

370 540

370 540

6 5

5 5

3 700 6 700

11 200 18 100

380 000 685 000

1 140 000 1 840 000

d

D

B2

304.800

495.300

342.900

304.902

412.648

305.003

C2

1)Minimum allowable dimension for chamfer dimension r or r1.

B-208

Cor

Cr

Cor


● Four Row Tapered Roller Bearings

Bearing numbers

Abutment and fillet dimensions

Mass

mm

kg

da

Da

 * E-EE724121D/724195/724196D

330

450

3

273

 * E-M257248D/M257210/M257210D

325

388

5

107

 * E-M757449D/M757410/M757410D

328

407

7

139

 * E-LM258649D/LM258610/LM258610D  * T-E-HM259049D/HM259010/HM259010D

334 339.6

398 418

7 5

110 161

  E-625964

355

420.5

7

183

  E-CRO-6604   E-CRO-6602

366 366

440 469

5.5 5

141 221

 * E-EE526131D/526190/526191D

351

448

3

197

 * E-HM261049D/HM261010/HM261010DA

357

439

5

187

  E-625968

373

440

7

200

 * E-LM761648D/LM761610/LM761610D

359

432

5

125

 * E-EE971355D/972100/972103D

378

502

11

252

 * E-LM761649D/LM761610/LM761610D

361

432

5

117

☆* T-E-HM262749D/HM262710/HM262710DG2

371

456

6

227

 * E-M262449D/M262410/M262410D

369

443

8

148

  E-CRO-7105

378

450

7

170

 * E-L163149D/L163110/L163110D  * E-LM263149D/LM263110/LM263110D  * E-LM763449D/LM763410/LM763410D  * E-M263349D/M263310/M263310D

370 372 375 374

422 434 453 459

6.5 6 3 5

89.5 106 145 173

  E-625972   E-CRO-7210

394 400

466.5 550

7 8

236 520

Note: 1. Bearing numbers marked " * " designate inch series bearings. 2. Bearing numbers marked " ☆ " designate bearing with hollow rollers and pin type cages.

B-209

Sa

(approx.)


● Four Row Tapered Roller Bearings

C2 r r1 B2

φD φDa

φd φda

Sa

d 368.300 ∼ 447.675mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm

kN

static kgf

r1s min1)

rs min1)

Cr

Cor

Cr

Cor

382.588

3.3

6.4

4 450

13 100

455 000

1 330 000

250.825

260.350

1.5

3.3

2 360

6 250

241 000

640 000

536 560

390 285

390 285

6 5

5 5

4 900 3 250

14 100 7 700

500 000 330 000

1 440 000 785 000

384.175

546.100

400.050

400.050

3.3

6.4

5 400

16 100

550 000

1 640 000

385.762

514.350

317.500

317.500

3.3

3.3

3 650

11 100

370 000

1 130 000

393.700

546.100

288.925

288.925

1.5

6.4

3 200

10 200

325 000

1 040 000

395

545

268.7

288.7

4

7.5

2 970

8 650

305 000

880 000

400

560 564

380 412

380 412

5 6

5 5

4 800 4 850

14 100 14 700

490 000 495 000

1 440 000 1 500 000

406.400

546.100 590.550 609.600

288.925 400.050 309.562

288.925 400.050 317.500

1.5 3.3 3.5

6.4 6.4 6.4

3 200 4 850 3 700

10 200 13 600 9 600

325 000 490 000 380 000

1 040 000 1 380 000 980 000

409.575

546.100

334.962

334.962

1.5

6.4

4 100

12 700

415 000

1 290 000

415.925

590.550

434.975

434.975

3.3

6.4

6 300

18 900

640 000

1 930 000

420

592 650

432 460

432 460

6 5

5 5

5 350 6 950

16 300 18 300

545 000 710 000

1 660 000 1 870 000

431.800

571.500 571.500

279.400 336.550

279.400 336.550

1.5 1.5

3.3 6.4

3 100 3 700

9 300 11 800

315 000 380 000

950 000 1 200 000

432.003

609.524

317.500

317.500

3.5

6.4

4 350

11 500

445 000

1 170 000

440

620 650 650

454 355 460

454 355 460

6 4 6

6 7.5 6

6 500 5 350 6 750

19 900 13 400 20 700

665 000 545 000 690 000

2 030 000 1 370 000 2 110 000

447.675

635.000

463.550

463.550

3.3

6.4

7 100

22 100

725 000

2 260 000

d

D

B2

368.300

523.875

382.588

374.650

501.650

380

C2

1)Minimum allowable dimension for chamfer dimension r or r1.

B-210


● Four Row Tapered Roller Bearings

Bearing numbers

Abutment and fillet dimensions

Mass

mm

kg

da

Da

Sa

(approx.)

☆* E-HM265049D/HM265010/HM265010DG2

393.7

487

6

280

 * E-LM765149D/LM765110/LM765110D

393

472

2

145

  E-625976   E-CRO-7612

410 417

495 525

8 7

277 208

☆* T-E-HM266449D/HM266410/HM266410DG2

411

507

6.5

312

 * E-LM665949D/LM665910/LM665910D

409

482

7

240

 * E-LM767745D/LM767710/LM767710D

418

510

6.5

219

  E-CRO-7901

434

508

3

200

 ☆ E-CRO-8005   E-625980

436 434

515 518.5

8 7

300 324

 * E-LM767749D/LM767710/LM767710D  * E-EE833161D/833232/833233D  * E-EE911603D/912400/912401D

427 448 441

510 549 568

6.5 6.5 1.5

201 395 332

☆* E-M667947D/M667911/M667911DG2

431

510

5.5

226

☆* T-E-M268749D/M268710/M268710DG2

444

549

9

421

  E-625984   E-CRO-8402

457 455

545 593

7 8

374 600

 * J-E-LM869449D/LM869410/LM869410D  * E-LM769349D/LM769310/LM769310D

453 453

537 534

8 6.5

198 232

 * E-EE736173D/736238/736239D

464

572

6.5

297

  E-625988  ☆ E-CRO-8807   E-CRO-8806

479 484 483

572.5 607 595

☆* E-M270749D/M270710/M270710DAG2

478

591

Note: 1. Bearing numbers marked " * " designate inch series bearings. 2. Bearing numbers marked " ☆ " designate bearing with hollow rollers and pin type cages.

B-211

8 9 11

430 400 600

8

509


● Four Row Tapered Roller Bearings

C2 r r1 B2

φD φDa

φd φda

Sa

d 457.200 ∼ 571.500mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm

kN

static kgf

r1s min1)

rs min1)

Cr

Cor

Cr

Cor

279.400 323.847

1.5 3.3

3.3 6.4

3 350 4 150

10 300 11 200

360 000 425 000

1 060 000 1 140 000

474

474

6

6

6 500

19 900

665 000

2 030 000

660

450

450

3

5

6 300

20 400

645 000

2 080 000

480

678 700

494 390

494 390

6 6

6 6

6 250 4 700

19 600 13 400

640 000 480 000

2 000 000 1 370 000

482.600

615.950

330.200

330.200

3.3

6.4

4 000

13 400

405 000

1 370 000

488.950

660.400

365.125

361.950

8

6.4

5 350

16 100

550 000

1 640 000

489.026

634.873

320.675

320.675

3.3

3.3

3 650

12 000

370 000

1 220 000

500

670 690 705 730

515 480 515 440

515 480 515 440

1.5 5 6 6

5 5 6 6

6 900 6 000 8 450 7 200

24 600 19 900 27 100 20 600

700 000 610 000 860 000 735 000

2 510 000 2 020 000 2 760 000 2 100 000

501.650

711.200

520.700

520.700

3.3

6.4

8 650

27 300

885 000

2 790 000

514.350

673.100

422.275

422.275

3.3

6.4

5 950

20 500

605 000

2 090 000

519.112

736.600

536.575

536.575

3.3

6.4

9 100

28 700

925 000

2 930 000

520

735

535

535

7

5

9 100

28 700

925 000

2 930 000

536.575

761.873

558.800

558.800

3.3

6.4

10 100

30 500

1 030 000

3 100 000

558.800

736.600 736.600

322.265 409.575

322.268 409.575

3.3 3.3

6.4 6.4

4 300 6 100

13 500 20 500

435 000 625 000

1 380 000 2 090 000

570

780 810

515 590

515 590

6 6

6 6

9 200 11 000

31 000 35 500

935 000 1 120 000

3 150 000 3 600 000

571.500

812.800

593.725

593.725

3.3

6.4

11 900

36 500

1 220 000

3 750 000

d

D

B2

457.200

596.900 660.400

276.225 323.850

460

650

475

C2

1)Minimum allowable dimension for chamfer dimension r or r1.

B-212


● Four Row Tapered Roller Bearings

Bearing numbers

Abutment and fillet dimensions

Mass

mm

kg

da

Da

Sa

☆* E-L770849D/L770810/L770810DG2  * E-EE737179D/737260/737260D

478 495

567 616

5.5 6.5

209 379

  E-625992A

499

598.5

7

493

  E-CRO-9501

506

614

10

465

  E-625996   E-CRO-9602

525 517

623 645

7 8

563 436

☆* E-LM272249D/LM272210/LM272210DG2

504

585

6.5

250

☆* T-E-EE640193D/640260/640261DG2

519

624

9

364

 * E-LM772749D/LM772710/LM772710DA

513

600

6.5

268

  E-CRO-10008   E-CRO-10005  ☆ E-6259/500  ☆ E-CRO-10003

520 530 553 550

616 640 649.5 683

8 7 7.5 11

598 600 632 535

☆* E-M274149D/M274110/M274110DG2

534

663

9.5

726

 * E-LM274449D/LM274410/LM274410D

540

648

8

390

☆* E-M275349D/M275310/M275310DG2

552

684

9.5

761

 ☆ E-CRO-10402

558

688

☆* E-M276449D/M276410/M276410DG2

564

711

9.5

890

 * E-EE843221D/843290/843291D ☆* E-LM377449D/LM377410/LM377410DG2

585 588

699 696

8.5 8

388 502

 ☆ E-CRO-11402  ☆ E-CRO-11403

609 620

733 760

7.5 10

625 845

☆* E-M278749D/M278710/M278710DAG2

609

756

11

Note: 1. Bearing numbers marked " * " designate inch series bearings. 2. Bearing numbers marked " ☆ " designate bearing with hollow rollers and pin type cages.

B-213

11

(approx.)

750

1 080


● Four Row Tapered Roller Bearings

C2 r r1 B2

φD φDa

φd φda

Sa

d 584.200 ∼ 840mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm

kN

static kgf

r1s min1)

rs min1)

Cr

Cor

Cr

Cor

401.638

3.3

6.4

6 550

22 300

670 000

2 280 000

479.425

479.425

3.3

6.4

8 550

29 000

875 000

2 960 000

844.550

615.950

615.950

3.3

6.4

12 600

40 500

1 290 000

4 100 000

609.600

787.400

361.950

361.950

3.3

6.4

6 450

20 300

655 000

2 070 000

657.225

933.450

676.275

676.275

3.3

6.4

15 300

48 000

1 560 000

4 900 000

642

642

7.5

7.5

15 400

43 500

1 570 000

4 450 000

d

D

B2

584.200

762.000

396.875

585.788

771.525

595.312

660

1 070

C2

660.400

812.800

365.125

365.125

3.3

6.4

6 200

23 200

630 000

2 360 000

679.450

901.700

552.450

552.450

3.3

6.4

11 200

38 000

1 140 000

3 900 000

680

870

460

460

3

6

7 500

27 400

765 000

2 790 000

682.625

965.200

701.675

701.675

3.3

6.4

16 100

50 500

1 640 000

5 150 000

685.800

876.300

352.425

355.600

3.3

6.4

6 050

21 800

615 000

2 220 000

710

900

410

410

2.5

5

7 650

26 900

780 000

2 740 000

711.200

914.400

317.500

317.500

3.3

6.4

5 350

17 900

545 000

1 820 000

730

1 070

642

642

7.5

7.5

15 400

46 500

1 570 000

4 750 000

730.250

1 035.050

755.650

755.650

3.3

6.4

18 100

59 500

1 850 000

6 050 000

749.300

990.600

605.000

605.000

3.3

6.4

12 600

45 500

1 290 000

4 650 000

762.000

1 079.500

787.400

787.400

4.8

12.7

19 200

65 000

1 960 000

6 600 000

800

1 120

820

820

7

7.5

21 000

72 500

2 140 000

7 400 000

825.500

1 168.400

844.550

844.550

4.8

12.7

22 300

76 500

2 270 000

7 800 000

840

1 170

840

840

6

6

21 900

76 500

2 230 000

7 800 000

1)Minimum allowable dimension for chamfer dimension r or r1.

B-214


● Four Row Tapered Roller Bearings

Bearing numbers

Abutment and fillet dimensions

Mass

mm

kg

da

Da

☆* E-LM778549D/LM778510/LM778510DG2

615

717

7

511

 * E-LM278849D/LM278810/LM278810D

615

726

10

750

☆* E-M280049D/M280010/M280010DG2

633

786

11

1 160

☆* E-EE649241D/649310/649311DG2

636

747

☆* E-M281649D/M281610/M281610DG2

699

870

11

1 630

 ☆ E-CRO-13202

760

991

9

1 950

☆* E-L281149D/L281110/L281110DG2

682.8

777

9

448

☆* E-LM281849D/LM281810/LM281810DG2

714

852

11

1 040

  E-CRO-13602

713

824

8

582

☆* E-M282249D/M282210/M282210DG2

723

900

13

1 770

☆* E-EE655271D/655345/655346DG2

717

831

8

539

 ☆ E-CRO-14208

745

850

10

620

☆* E-EE755281D/755360/755361DG2

744

873

 ☆ E-CRO-14601

780

1 020

7

1 900

☆* E-M283449D/M283410/M283410DG2

774

966

13

2 210

☆* E-LM283649D/LM283610/LM283610DG2

786

936

10.5

1 310

☆* E-M284249D/M284210/M284210DG2

810

1 005

13

2 480

 ☆ E-CRO-16001

858

1 052

10

3 960

☆* E-M285848D/M285810/M285810DG2

879

1 085

13

3 010

 ☆ E-CRO-16803

897

1 099

12

3 970

Note: 1. Bearing numbers marked " * " designate inch series bearings. 2. Bearing numbers marked " ☆ " designate bearing with hollow rollers and pin type cages.

B-215

Sa

9.5

9.5

(approx.)

458

527


● Four Row Tapered Roller Bearings

C2 r r1 B2

φD φDa

φd φda

Sa

d 863.600 ∼ 1 200.150mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm d

kN r1s min1)

rs min1)

static kgf

D

B2

863.600

1 130.300 1 219.200

669.925 876.300

669.925 889.000

4.8 4.8

12.7 12.7

15 800 24 100

59 500 83 000

1 610 000 2 450 000

6 050 000 8 450 000

938.212

1 270.000

825.500

825.500

4.8

12.7

22 500

80 000

2 300 000

8 150 000

950

1 360

880

880

4

7.5

27 000

89 000

2 750 000

9 050 000

1 593.850

990.600

990.600

4.8

12.7

33 500

132 000

3 400 000

13 500 000

1 200.150

C2

1)Minimum allowable dimension for chamfer dimension r or r1.

B-216

Cr

Cor

Cr

Cor


● Four Row Tapered Roller Bearings

Bearing numbers

Abutment and fillet dimensions

Mass

mm

kg

da

Da

Sa

(approx.)

☆* E-LM286249D/LM286210/LM286210DG2 ☆* E-EE547341D/547480/547481DG2

906 918

1 065 1 135

11 6.5

1 950 3 640

☆* E-LM287649D/LM287610/LM287610DG2

990

1 190

10

4 100

 ☆ E-CRO-19001

1 030

1 278

12

4 100

☆* E-LM288949D/LM288910/LM288910DG2

1 260

1 500

13

6 130

Note: 1. Bearing numbers marked " * " designate inch series bearings. 2. Bearing numbers marked " ☆ " designate bearing with hollow rollers and pin type cages.

B-217


â—?Spherical Roller Bearings

1. Types, construction and characteristics

In addition to bearings with cylindrical bore, those with tapered bore are also available. Bearings with tapered bore are specified by attaching the suffix "K" to the end of the bearing's basic number. The standard taper ratio is 1:12 for bearings with a "K" suffix, but for bearings in series 240 and 241 the suffix "K30" indicates the taper ratio for a bearing is 1:30. Most tapered bore bearings incorporate the use of adapters and withdrawal sleeves for shaft mounting.

Spherical roller bearings consist of an outer ring having a continuous spherical raceway within which operates two rows of barrel-shaped rollers which are in turn guided by an inner ring with two raceways separated by a center rib. (Refer to Diagram 1) This bearing has self-aligning properties, and therefore is suited for use where misalignment between the inner and outer rings occurs from housing installation error or shaft flexure. Spherical roller bearings have a large capacity for radial loads, axial loads in either direction, and complex loads. They are also suited for applications where vibration and shock loads are encountered. When operating under axial loads, however, it is desirable to maintain conditions so that Fa /Fr≌2e in order to prevent sliding movement along the row of rollers not receiving the axial load. (For the value of e, refer to dimension tables.) As shown in Table 1, in addition to standard type there are various other types of spherical roller bearings. Among these, Type E has a particularly high load capacity.

Allowable misalignment

Diagram 1.

Table 1 Types of spherical roller bearings Type

Standard type (B type)

C type

213 type

E type

Series 222, 223, and 213 with bore dia. of 50 mm or less; series 24024 to 24038.

Series 213 with bore dia. of 55 mm or more

Series 22211 to 22218

Symmetrical

Asymmetrical

Symmetrical

By guide ring between the 2 rows of rollers

By guide ring between rows of rollers on outer ring raceway

High precision cage (no guide ring, center rib)

Pressed cage

Machined cage

Molded resin cage

Construction

Bearing series Does not include C type Rollers Roller guide method cage type

Asymmetrical Unified inner ring center rib Pressed cage; machined cage

B-219


●Spherical Roller Bearings

2. Standard cage types h

Standard cage types for spherical roller bearings are shown in Table 2. In general, pressed cages are standard for small sized bearings, and machined cages are standard for large sized bearings. E type bearings use as their standard cage type a cage molded from a newly developed glass fiber reinforced polyamide 46 resin which has excellent heat resistance qualities (allowable operating temperatures up to 150˚C), strength, as well as unsurpassed oil resistance. A standard cage may however not be able to be used for high-speed specifications, in high temperature atmospheres, or under excessive vibration/impact conditions. For more information concerning such conditions, please contact NTN Engineering.

Table 3 Oil inlet and oil groove dimensions

Pressed cage

Nominal bearing Oil groove Oil inlet width width diameter Width series Width series Wo do over   including 1, 2, 3 4 − 30 45 60 80 100 120 160 200 315

Machined cage

239 230 240

− − −

− 23932 ∼ 239/1400 23022B ∼ 23048B 23052B ∼ 230/1120B 24024C ∼ 24038C 24024B ∼ 240/1120B

231 241

− −

23120B ∼ 23136B 23138B ∼ 231/900B − 24122B ∼ 241/710B

222

232 213 223

30 45 60 80 100 120 160 200 315 −

6 7 9 11 14 16 20 27 33 42

3 4 5 6 8 10 12 16 20 25

1.2 1.5 1.5 2.0 2.5 3.0 3.5 5.0 6.0 7.0

1.0 1.1 1.3 1.5 2.0 2.5 3.0 3.5 5.0 6.5

Table 4 Oil inlet number Nominal bearing outer diameter mm over up to including − 320 1 010

22211E ∼ 22218E 22208C ∼ 22210C 22238B ∼ 22264B 22211B ∼ 22236B − − −

Units mm Oil groove depth h

Table 2 Standard cage types Bearing Molded resin cage series

Wo Zo do

− 23218B ∼ 232/750B 21308C ∼ 21310C 21311 ∼ 21322 22308C ∼ 22310C 22330B ∼ 22360B 22311B ∼ 22328B

320 1 010 −

Oil inlet number Zo 4 8 12

If a pin is necessary to prevent outer ring rotation, contact

NTN Engineering.

3. Oil inlets and oil groove dimensions

4. Allowable misalignment

Spherical roller bearings with an outer diameter of 320mm or more are provided with an oil inlet and oil groove on the outer ring for the purpose of supplying lubricant to the bearing's moving parts. When necessary, oil inlets and oil grooves can also be provided on bearings with outer diameters less than 320 mm. In such cases, please add the supplementary suffix code "D1" to the end of the bearing number, and contact NTN Engineering. (Refer to page A-29) Table 3 lists dimensions for oil inlets and oil grooves. Table 4 contains information about the number of oil inlets.

Spherical roller bearings possess the same self-aligning properties as other self-aligning bearings. The allowable misalignment angle will vary according to dimension series and load conditions, but the following misalignment angles are generally standard: Normal load (loads equivalent to 0.09 Cr): ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯0.009rad (0.5˚) Light load: ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯0.035rad (2˚)

B-220


●Spherical Roller Bearings

5. Adapters and withdrawal sleeves

6. LH series

Adapters are used for installation of bearings with tapered bore on cylindrical shafts. Withdrawal sleeves are also used to install and disassemble bearings with tapered bore onto and off of cylindrical shafts. In disassembling the bearing from the shaft, the nut is pressed down against the edge of the inner ring utilizing the bolt provided on the withdrawal sleeve, and then the sleeve is drawn away from the bearing's inner diameter surface. (Precision of adapter and withdrawal sleeve are stipulated JIS B 1552 and JIS B 1556). For bearings with a bore diameter of 200 mm or more, high pressure oil (hydraulic) type adapters and withdrawal sleeves have been standardized to make installation and disassembly easier. As shown in Diagram 2 construction is designed to reduce friction by injecting high pressure oil between the surfaces of the adapter sleeve and bearing inner bore by means of a pressure fitting. If the oil supply inlet is attached in the nut side of the adapter, the supplementary suffix "HF" should be added to the bearing number; if the oil supply inlet is attached on the opposite side, the suffix "HB" should be added to the bearing number. For adapter sleeves, the supplementary suffix "H" is added to the bearing's number in both cases. The hydraulic sleeve nut is equipped with holes for bolts used for mounting and dismounting and holes for hydraulic piping. The suffix SP or SPB is added to the bearing number of the nut.

In recent years, conditions under which spherical roller bearings are used have become increasingly severe. In particular, longer life is now demanded for use in high temperature environments. Taking the global environment into account, NTN Engineering has developed a type of steel (STJ2) that offers longer life in a wide range of temperatures, from room temperature all the way up to 250˚C. The steel is standardly used in NTN Engineering's LH series of spherical roller bearings. Features are as follows (in comparison with SUJ2): (1) Longer life in wide range of temperatures. ¡3.5 times longer life at room temperature. ¡30 times longer life at high temperature (250˚C). (2) Resists surface damage. ¡7 times stronger resistance to peeling ¡1.4 times stronger resistance to smearing ¡2.5 times stronger resistance to wear (3) Dimensions stability at high temperatures. ¡Almost no dimensional variation when maintained at 250˚C. (4) Enhanced cracking fatigue strength. ¡2 times longer cracking fatigue life under high temperatures or tight fitting stress. ¡2 times better operating cracking fatigue strength. (5) Simplified service part stock management. ¡Applications ranging from room temperature to 250˚C can be handles with a single type of standard bearing. Items with LH preceding the basic number in the dimensions table are LH series and are gradually being switched. Bearing numbers without LH can be manufactured according to size. For information, please contact NTN Engineering.

Diagram 2.

B-221


● Spherical Roller Bearings

B r r

φD

φd

φd

Cylindrical bore

Tapered bore

d 25 ∼ 75mm Boundary dimensions dynamic mm

Limiting speeds1)

Basic load ratings static dynamic kN

Bearing numbers4)

static min-1

kgf

cylindrical bore

tapered2) bore

D

B

rs min3)

Cr

Cor

25

52

18

1

36.5

36

3 750

3 650

8 500

11 000

22205C

22205CK

30

62

20

1

49

49

5 000

5 000

7 500

9 500

22206C

22206CK

35

72

23

1.1

69.5

71

7 050

7 200

6 500

8 500

22207C

22207CK

40

80 90 90

23 23 33

1.1 1.5 1.5

79 88 121

88.5 90 128

8 050 8 950 12 300

9 000 9 150 13 000

6 000 4 900 4 500

7 600 6 400 5 900

LH-22208C 21308C 22308C

LH-22208CK 21308CK 22308CK

45

85 100 100

23 25 36

1.1 1.5 1.5

82.5 102 148

95 106 167

8 400 10 400 15 100

9 700 10 800 17 000

5 300 4 400 4 100

6 800 5 700 5 300

LH-22209C 21309C 22309C

LH-22209CK 21309CK 22309CK

50

90 110 110

23 27 40

1.1 2 2

86 118 186

102 127 212

8 750 12 000 19 000

10 400 12 900 21 600

4 900 4 000 3 700

6 300 5 200 4 800

LH-22210C 21310C 22310C

LH-22210CK 21310CK 22310CK

55

100 100 120 120

25 25 29 43

1.5 1.5 2 2

118 93.5 145 204

144 110 163 234

12 000 9 500 14 800 20 800

14 700 11 200 16 600 23 900

4 400 4 500 3 700 3 400

5 800 5 800 4 800 4 400

LH-22211E LH-22211B 21311 22311B

LH-22211EK LH-22211BK 21311K 22311BK

60

110 110 130 130

28 28 31 46

1.5 1.5 2.1 2.1

150 115 167 238

182 147 191 273

15 300 11 700 17 100 24 300

18 500 15 000 19 500 27 800

4 000 4 100 3 400 3 100

5 300 5 300 4 400 4 000

LH-22212E LH-22212B 21312 22312B

LH-22212EK LH-22212BK 21312K 22312BK

65

120 120 140 140

31 31 33 48

1.5 1.5 2.1 2.1

177 143 194 265

217 179 228 320

18 000 14 600 19 800 27 100

22 200 18 300 23 200 32 500

3 800 3 900 3 100 2 800

5 000 5 000 4 000 3 700

LH-22213E LH-22213B 21313 22313B

LH-22213EK LH-22213BK 21313K 22313BK

70

125 125 150 150

31 31 35 51

1.5 1.5 2.1 2.1

184 154 220 325

232 201 262 380

18 700 15 700 22 400 33 000

23 600 20 500 26 800 39 000

3 400 3 500 2 900 2 700

4 600 4 600 3 800 3 500

LH-22214E LH-22214B 21314 22314B

LH-22214EK LH-22214BK 21314K 22314BK

75

130

31

1.5

190

246

19 400

25 100

3 200

4 200

LH-22215E

LH-22215EK

d

Cr

Cor

grease

oil

1)This value was achieved with machined cages and molded resin cages; for pressed cages, 75% of this value is allowable. 2)"K" indicates bearings have tapered bore with a taper ratio of 1: 12. 3)Smallest allowable dimension for chamfer dimension r. 4)Bearing number with the prefix LH indicates LH series. B-222


● Spherical Roller Bearings

ra Equivalent radial load dynamic Pr=XFr+YFa Fa Fa ≦e Fr Fr >e X Y X Y 1 Y1 0.67 Y2 static Por=Fr+YoFa For values of e, Y2 and Yo see the table below.

ra φDa

φda

Abutment and fillet dimensions

Constant

Axial load factors

Mass (approx.)

mm da min

kg Da

max

ras

min

max

max

e

Y1

Y2

Yo

cylindrical bore

tapered bore

31

46

1

0.35

1.92

2.86

1.88

0.186

0.182

36

56

1

0.33

2.07

3.09

2.03

0.287

0.282

42

65

1

0.32

2.09

3.11

2.04

0.446

0.437

47 48.5 48.5

― ― ―

― ― ―

73 81.5 81.5

1 1.5 1.5

0.29 0.26 0.38

2.35 2.55 1.76

3.50 3.80 2.62

2.30 2.50 1.72

0.526 0.705 0.974

0.515 0.694 0.951

52 53.5 53.5

― ― ―

― ― ―

78 91.5 91.5

1 1.5 1.5

0.27 0.26 0.36

2.50 2.60 1.86

3.72 3.87 2.77

2.44 2.54 1.82

0.584 0.927 1.33

0.572 0.912 1.3

57 60 60

― ― ―

― ― ―

83 100 100

1 2 2

0.25 0.26 0.37

2.69 2.64 1.80

4.01 3.93 2.69

2.63 2.58 1.76

0.63 1.21 1.79

0.616 1.19 1.75

63.5 63.5 65 65

67 ― ― ―

89.5 ― ― ―

91.5 91.5 110 110

1.5 1.5 2 2

0.24 0.28 0.25 0.40

2.83 2.42 2.69 1.68

4.21 3.61 4.01 2.50

2.76 2.37 2.63 1.64

0.808 0.85 1.71 2.3

0.79 0.832 1.69 2.25

68.5 68.5 72 72

72 ― ― ―

98 ― ― ―

101.5 101.5 118 118

1.5 1.5 2 2

0.25 0.27 0.25 0.42

2.75 2.49 2.69 1.62

4.09 3.71 4.00 2.42

2.69 2.44 2.63 1.59

1.09 1.15 2.1 2.9

1.07 1.13 2.07 2.83

73.5 73.5 77 77

78.5 ― ― ―

107 ― ― ―

111.5 111.5 128 128

1.5 1.5 2 2

0.25 0.28 0.25 0.38

2.71 2.42 2.69 1.79

4.04 3.60 4.00 2.67

2.65 2.37 2.63 1.75

1.43 1.5 2.55 3.45

1.4 1.47 2.51 3.37

78.5 78.5 82 82

83.5 ― ― ―

112.5 ― ― ―

116.5 116.5 138 138

1.5 1.5 2 2

0.24 0.26 0.25 0.37

2.86 2.55 2.69 1.81

4.25 3.80 4.00 2.70

2.79 2.50 2.63 1.77

1.51 1.55 3.18 4.22

1.47 1.52 3.14 4.12

83.5

89

117.5

121.5

1.5

0.22

3.00

4.47

2.94

1.59

1.55

Note: Upon request, bearings with oil inlets and oil grooves on the outer ring can also be manufactured. In such cases, please add the suffix "D1" to the end of the bearing number. (Example: 22214BD1)

B-223


● Spherical Roller Bearings

B r r

φD

φd

φd

Cylindrical bore

Tapered bore

d 75 ∼ 120mm Boundary dimensions dynamic mm

kN

d

D

B

rs min3)

75

130 160 160

31 37 55

80

140 140 170 170

Limiting speeds1)

Basic load ratings static dynamic

Bearing numbers4)

static min-1

kgf

cylindrical bore

tapered2) bore

Cr

Cor

Cr

Cor

grease

oil

1.5 2.1 2.1

166 239 330

223 287 410

16 900 24 300 33 500

22 800 29 300 42 000

3 200 2 700 2 500

4 200 3 500 3 200

LH-22215B LH-22215BK 21315 21315K 22315B 22315BK

33 33 39 58

2 2 2.1 2.1

213 179 260 385

277 239 315 470

21 700 18 300 26 500 39 500

28 200 24 400 32 000 48 000

3 000 3 100 2 500 2 300

4 000 4 000 3 300 3 000

LH-22216E LH-22216EK LH-22216B LH-22216BK 21316 21316K 22316B 22316BK

85

150 150 180 180

36 36 41 60

2 2 3 3

251 206 289 415

320 272 355 510

25 600 21 000 29 500 42 500

33 000 27 800 36 000 52 000

2 800 2 900 2 400 2 200

3 800 3 800 3 100 2 900

LH-22217E LH-22217EK LH-22217B LH-22217BK 21317 21317K 22317B 22317BK

90

160 160 160 190 190

40 40 52.4 43 64

2 2 2 3 3

292 256 315 320 480

385 345 455 400 590

29 800 26 200 32 500 32 500 49 000

39 500 35 000 46 500 40 500 60 000

2 600 2 700 2 200 2 300 2 100

3 500 3 500 2 800 3 000 2 700

LH-22218E LH-22218EK LH-22218B LH-22218BK 23218B 23218BK 21318 21318K 22318B 22318BK

95

170 200 200

43 45 67

2.1 3 3

294 335 500

390 420 615

30 000 34 000 51 000

39 500 43 000 63 000

2 500 2 100 1 900

3 300 2 700 2 500

22219B 21319 22319B

22219BK 21319K 22319BK

100

165 180 180 215 215

52 46 60.3 47 73

2 2.1 2.1 3 3

310 315 405 370 605

470 415 580 465 755

31 500 32 000 41 500 37 500 61 500

47 500 42 500 59 000 47 500 77 000

2 000 2 400 1 900 2 000 1 800

2 600 3 200 2 500 2 600 2 400

23120B 22220B 23220B 21320 22320B

23120BK 22220BK 23220BK 21320K 22320BK

110

170 180 180 200 200 240 240

45 56 69 53 69.8 50 80

2 2 2 2.1 2.1 3 3

282 370 450 410 515 495 745

455 580 755 570 760 615 930

28 800 37 500 46 000 42 000 52 500 50 500 76 000

46 500 59 500 77 000 58 000 77 500 62 500 95 000

2 200 1 800 1 800 2 200 1 700 1 800 1 700

2 800 2 400 2 400 2 800 2 200 2 300 2 200

23022B 23122B 24122B 22222B 23222B 21322 22322B

23022BK 23122BK 24122BK30 22222BK 23222BK 21322K 22322BK

120

180

46

2

296

495

30 000

50 500

2 000

2 600

23024B

23024BK

1)This value was achieved with machined cages and molded resin cages; for pressed cages, 75% of this value is allowable. 2)Bearings appended with "K" have a tapered bore ratio of 1:12. 3)Smallest allowable dimension for chamfer dimension r. 4)Bearing number with the prefix LH indicates LH series. B-224


● Spherical Roller Bearings

ra Equivalent radial load dynamic Pr=XFr+YFa Fa Fa ≦e Fr Fr >e X Y X Y 1 Y1 0.67 Y2 static Por=Fr+YoFa For values of e, Y2 and Yo see the table below.

ra φDa

φda

Abutment and fillet dimensions

Constant

Axial load factors

Mass (approx.)

mm da min

kg Da

max

ras

cylindrical bore

tapered bore

min

max

max

e

Y1

Y2

Yo

― ― ―

121.5 148 148

1.5 2 2

0.24 0.24 0.37

2.81 2.84 1.80

4.19 4.23 2.69

2.75 2.78 1.76

1.65 3.81 5.25

1.61 3.76 5.13

125.5 ― ― ―

130 130 158 158

2 2 2 2

0.22 0.26 0.23 0.37

3.01 2.64 2.95 1.80

4.48 3.93 4.39 2.69

2.94 2.58 2.88 1.76

1.99 2.15 4.53 6.05

1.94 2.11 4.47 5.91

83.5 87 87

― ― ―

90 90 92 92

94.5 ― ― ―

95 95 99 99

100.5 ― ― ―

135 ― ― ―

140 140 166 166

2 2 2.5 2.5

0.23 0.26 0.25 0.37

2.96 2.60 2.69 1.82

4.41 3.88 4.00 2.71

2.90 2.55 2.63 1.78

2.49 2.66 5.35 7.1

2.43 2.61 5.28 6.94

100 100 100 104 104

107.5 ― ― ― ―

144 ― ― ― ―

150 150 150 176 176

2 2 2 2.5 2.5

0.24 0.26 0.33 0.24 0.37

2.86 2.55 2.04 2.83 1.80

4.25 3.80 3.03 4.22 2.69

2.79 2.49 1.99 2.77 1.76

3.24 3.5 4.45 6.3 8.35

3.16 3.42 4.32 6.21 8.16

107 109 109

― ― ―

― ― ―

158 186 186

2 2.5 2.5

0.26 0.23 0.37

2.63 3.00 1.80

3.92 4.46 2.69

2.57 2.93 1.76

4.1 7.1 9.76

4.01 7 9.54

110 112 112 114 114

― ― ― ― ―

― ― ― ― ―

155 168 168 201 201

2 2 2 2.5 2.5

0.32 0.26 0.34 0.22 0.37

2.12 2.55 1.98 3.01 1.80

3.15 3.80 2.94 4.48 2.69

2.07 2.49 1.93 2.94 1.76

4.3 4.95 6.47 8.89 12.4

4.16 4.84 6.28 8.78 12.1

120 120 120 122 122 124 124

― ― ― ― ― ― ―

― ― ― ― ― ― ―

160 170 170 188 188 226 226

2 2 2 2 2 2.5 2.5

0.26 0.31 0.38 0.27 0.35 0.21 0.36

2.59 2.17 1.76 2.51 1.91 3.20 1.87

3.85 3.24 2.63 3.74 2.84 4.77 2.79

2.53 2.13 1.73 2.46 1.86 3.13 1.83

3.71 5.4 7.07 7.2 9.71 11.2 17.1

3.58 5.22 6.96 7.04 9.43 11.1 16.7

130

170

2

0.25

2.69

4.01

2.63

4.05

3.9

Note: Upon request, bearings with oil inlets and oil grooves on the outer ring can also be manufactured. In such cases, please add the suffix "D1" to the end of the bearing number. (Example: 23024BD1)

B-225


● Spherical Roller Bearings

B r r

φD

φd

φd

Cylindrical bore

Tapered bore

d 120 ∼ 160mm Boundary dimensions dynamic mm

kN

d

D

B

rs min3)

120

180 180 200 200 215 215 260

60 60 62 80 58 76 86

2 2 2 2 2.1 2.1 3

130

200 200 200 210 210 230 230 280

52 69 69 64 80 64 80 93

140

210 210 210 225 225 250 250 300

Limiting speeds1)

Basic load ratings static dynamic

Bearing numbers4)

static min-1

kgf

cylindrical bore

tapered2) bore

Cr

Cor

grease

oil

670 695 705 945 700 880 1 120

39 500 40 000 46 500 58 500 49 500 59 500 89 500

68 500 71 000 71 500 96 500 71 500 89 500 114 000

1 800 1 800 1 600 1 600 2 000 1 500 1 500

2 300 2 300 2 100 2 100 2 600 2 000 2 000

24024B 24024C 23124B 24124B 22224B 23224B 22324B

24024BK30 24024CK30 23124BK 24124BK30 22224BK 23224BK 22324BK

375 505 490 495 585 570 685 1 000

620 895 860 795 995 790 1 060 1 290

38 500 51 500 50 000 50 500 60 000 58 000 70 000 102 000

63 500 91 000 87 500 81 000 102 000 80 500 108 000 131 000

1 800 1 600 1 600 1 500 1 500 1 800 1 500 1 400

2 300 2 100 2 100 2 000 2 000 2 400 1 900 1 800

23026B 24026B 24026C 23126B 24126B 22226B 23226B 22326B

23026BK 24026BK30 24026CK30 23126BK 24126BK30 22226BK 23226BK 22326BK

2 2 2 2.1 2.1 3 3 4

405 510 520 540 670 685 805 1 130

690 945 940 895 1 150 975 1 270 1 460

41 000 52 000 53 000 55 000 68 500 70 000 82 000 115 000

70 500 96 500 95 500 91 000 117 000 99 500 129 000 149 000

1 700 1 500 1 500 1 400 1 400 1 700 1 300 1 300

2 200 1 900 1 900 1 800 1 800 2 200 1 700 1 700

23028B 24028B 24028C 23128B 24128B 22228B 23228B 22328B

23028BK 24028BK30 24028CK30 23128BK 24128BK30 22228BK 23228BK 22328BK

56 75 75 80 100 73 96 108

2.1 2.1 2.1 2.1 2.1 3 3 4

445 585 600 730 885 775 935 1 270

775 1 060 1 090 1 190 1 520 1 160 1 460 1 750

45 500 59 500 61 000 74 500 90 500 79 000 95 000 130 000

79 000 108 000 111 000 121 000 155 000 119 000 149 000 179 000

1 500 1 400 1 400 1 300 1 300 1 600 1 200 1 200

2 000 1 800 1 800 1 700 1 700 2 000 1 600 1 600

23030B 24030B 24030C 23130B 24130B 22230B 23230B 22330B

23030BK 24030BK30 24030CK30 23130BK 24130BK30 22230BK 23230BK 22330BK

45 60 80 80

2 2.1 2.1 2.1

320 505 650 665

610 885 1 200 1 250

33 000 51 500 66 500 67 500

62 500 90 000 122 000 127 000

1 500 1 500 1 300 1 300

2 000 1 900 1 700 1 700

23932 23032B 24032B 24032C

23932K 23032BK 24032BK30 24032CK30

Cr

Cor

390 395 455 575 485 585 880

2 2 2 2 2 3 3 4

53 69 69 68 85 68 88 102

150

225 225 225 250 250 270 270 320

160

220 240 240 240

1)This value was achieved with machined cages and molded resin cages; for pressed cages, 75% of this value is allowable. 2)Bearings appended with "K" have a tapered bore ratio of 1:12. 3)Smallest allowable dimension for chamfer dimension r.

B-226


● Spherical Roller Bearings

ra Equivalent radial load dynamic Pr=XFr+YFa Fa Fa ≦e Fr Fr >e X Y X Y 1 Y1 0.67 Y2 static Por=Fr+YoFa For values of e, Y2 and Yo see the table below.

ra φDa

φda

Abutment and fillet dimensions mm da Da ras

Constant

Axial load factors

Mass (approx.) kg

min

max

max

e

130 130 130 130 132 132 134

170 170 190 190 203 203 246

2 2 2 2 2 2 2.5

0.33 0.32 0.31 0.40 0.27 0.36 0.37

140 140 140 140 140 144 144 148

190 190 190 200 200 216 216 262

2 2 2 2 2 2.5 2.5 3

150 150 150 152 152 154 154 158

200 200 200 213 213 236 236 282

162 162 162 162 162 164 164 168 170 172 172 172

Y1

cylindrical bore

tapered bore

Y2

Yo

2.06 2.12 2.17 1.68 2.47 1.89 1.80

3.07 3.15 3.24 2.50 3.68 2.82 2.69

2.02 2.07 2.13 1.64 2.42 1.85 1.76

5.48 5.48 7.7 10.3 9.1 12.1 21.5

5.39 4.91 7.46 10.1 8.89 11.7 21

0.26 0.34 0.32 0.30 0.38 0.28 0.35 0.37

2.63 1.98 2.12 2.23 1.78 2.39 1.92 1.81

3.92 2.95 3.15 3.32 2.65 3.56 2.86 2.69

2.57 1.94 2.07 2.18 1.74 2.33 1.88 1.77

5.9 8.08 7.91 8.47 11 11.2 14.3 26.8

5.69 7.95 7.78 8.2 10.8 10.9 13.9 26.2

2 2 2 2 2 2.5 2.5 3

0.25 0.32 0.30 0.30 0.38 0.28 0.36 0.37

2.73 2.09 2.23 2.25 1.80 2.39 1.90 1.80

4.06 3.12 3.32 3.35 2.68 3.55 2.83 2.69

2.67 2.05 2.18 2.20 1.76 2.33 1.86 1.76

6.35 8.57 8.48 10.2 13.3 14 18.8 33.8

6.12 8.43 7.66 9.86 13.1 13.7 18.2 33

213 213 213 238 238 256 256 302

2 2 2 2 2 2.5 2.5 3

0.24 0.33 0.30 0.32 0.40 0.27 0.36 0.35

2.76 2.06 2.25 2.11 1.69 2.46 1.88 1.92

4.11 3.07 3.34 3.15 2.51 3.66 2.79 2.86

2.70 2.02 2.20 2.06 1.65 2.4 1.83 1.88

7.73 10.7 10.5 15.6 20.2 18.1 24.1 42.7

7.45 10.5 10.3 15.1 20 17.7 23.4 41.8

210 228 228 228

2 2 2 2

0.18 0.25 0.32 0.31

3.69 2.74 2.10 2.18

5.49 4.09 3.13 3.24

3.61 2.68 2.06 2.13

5.5 9.42 13 12

5.33 9.09 12.8 11.8

Note: An oil groove is provided for outer rings of bearings with an outer diameter (D dimension) of 320 mm or more. See page B-212 on dimensions. We can make bearings with oil hole or oil groove in the outer ring, per your request, for an outer diameter of 320mm or less. Such bearings are indicated by attaching "D1" to the end of the bearing number. (ex. 23032BD1) B-227


● Spherical Roller Bearings

B r r

φD

φd

φd

Cylindrical bore

Tapered bore

d 160 ∼ 200mm Boundary dimensions dynamic mm

kN rs min3)

Limiting speeds1)

Basic load ratings static dynamic

Bearing numbers4)

static min-1

kgf

cylindrical bore

tapered2) bore

Cr

Cor

grease

oil

1 370 1 780 1 290 1 660 1 990

85 500 106 000 88 500 107 000 144 000

140 000 181 000 132 000 170 000 203 000

1 200 1 200 1 500 1 200 1 200

1 600 1 600 1 900 1 500 1 500

23132B 24132B 22232B 23232B 22332B

23132BK 24132BK30 22232BK 23232BK 22332BK

330 630 800 815 885 1 080 1 000 1 180 1 540

650 1 080 1 470 1 500 1 490 1 880 1 520 1 960 2 180

34 000 64 000 81 500 83 000 90 500 110 000 102 000 120 000 157 000

66 000 110 000 150 000 153 000 152 000 191 000 155 000 200 000 223 000

1 500 1 400 1 200 1 200 1 200 1 200 1 400 1 100 1 100

1 900 1 800 1 600 1 600 1 500 1 500 1 800 1 400 1 400

23934 23034B 24034B 24034C 23134B 24134B 22234B 23234B 22334B

23934K 23034BK 24034BK30 24034CK30 23134BK 24134BK30 22234BK 23234BK 22334BK

2 2.1 2.1 2.1 3 3 4 4 4

440 740 965 965 1 030 1 250 1 040 1 230 1 740

835 1 290 1 770 1 770 1 730 2 210 1 610 2 000 2 560

45 000 75 500 98 500 98 500 105 000 127 000 106 000 125 000 177 000

85 000 132 000 181 000 181 000 176 000 225 000 164 000 204 000 261 000

1 400 1 300 1 200 1 200 1 100 1 100 1 300 1 000 1 000

1 800 1 700 1 500 1 500 1 400 1 400 1 700 1 300 1 300

23936 23036B 24036B 24036C 23136B 24136B 22236B 23236B 22336B

23936K 23036BK 24036BK30 24036CK30 23136BK 24136BK30 22236BK 23236BK 22336BK

52 75 100 100 104 128 92 120 132

2 2.1 2.1 2.1 3 3 4 4 5

460 755 995 970 1 190 1 420 1 160 1 400 1 870

890 1 350 1 850 1 820 2 020 2 480 1 810 2 330 2 790

47 000 77 000 102 000 98 500 122 000 144 000 118 000 143 000 191 000

91 000 138 000 188 000 186 000 206 000 253 000 185 000 237 000 284 000

1 300 1 200 1 100 1 100 1 000 1 000 1 200 920 920

1 700 1 600 1 400 1 400 1 300 1 300 1 600 1 200 1 200

23938 23038B 24038B 24038C 23138B 24138B 22238B 23238B 22338B

23938K 23038BK 24038BK30 24038CK30 23138BK 24138BK30 22238BK 23238BK 22338BK

60 82 109

2.1 2.1 2.1

545 915 1 160

1 100 1 620 2 140

56 000 93 000 118 000

112 000 165 000 219 000

1 200 1 200 1 000

1 600 1 500 1 300

23940 23040B 24040B

23940K 23040BK 24040BK30

d

D

B

Cr

Cor

160

270 270 290 290 340

86 109 80 104 114

2.1 2.1 3 3 4

840 1 040 870 1 050 1 410

170

230 260 260 260 280 280 310 310 360

45 67 90 90 88 109 86 110 120

2 2.1 2.1 2.1 2.1 2.1 4 4 4

180

250 280 280 280 300 300 320 320 380

52 74 100 100 96 118 86 112 126

190

260 290 290 290 320 320 340 340 400

200

280 310 310

1)This value was achieved with machined cages and molded resin cages; for pressed cages, 75% of this value is allowable. 2)Bearings appended with "K" have a tapered bore ratio of 1:12. 3)Smallest allowable dimension for chamfer dimension r.

B-228


● Spherical Roller Bearings

ra Equivalent radial load dynamic Pr=XFr+YFa Fa Fa ≦e >e Fr Fr X Y X Y 1 Y1 0.67 Y2 static Por=Fr+YoFa For values of e, Y2 and Y see the table below.

ra φDa

φda

Abutment and fillet dimensions mm da Da ras

Constant

Axial load factors

Mass (approx.) kg

Y2

Yo

cylindrical bore

2.11 1.67 2.42 1.86 1.94

3.15 2.48 3.60 2.77 2.89

2.07 1.63 2.37 1.82 1.90

19.8 26 22.7 30 50.8

19.2 25.6 22.2 29.1 49.7

0.17 0.25 0.34 0.31 0.31 0.39 0.28 0.36 0.34

3.91 2.66 1.98 2.16 2.15 1.74 2.39 1.87 1.96

5.83 3.96 2.95 3.22 3.21 2.59 3.56 2.79 2.91

3.83 2.60 1.94 2.12 2.11 1.70 2.34 1.83 1.91

5.8 12.7 17.7 17.4 21.5 27.2 28 36.8 59.8

5.62 12.3 17.4 17.1 20.8 26.8 27.3 35.7 58.5

2 2 2 2 2.5 2.5 3 3 3

0.19 0.26 0.35 0.33 0.32 0.39 0.27 0.35 0.34

3.52 2.59 1.91 2.04 2.11 1.72 2.49 1.91 1.97

5.25 3.85 2.85 3.04 3.15 2.56 3.70 2.84 2.93

3.45 2.53 1.87 2.00 2.07 1.68 2.43 1.86 1.92

8.21 16.7 23.3 23 25.1 34.3 29.3 39 70

7.95 16.1 22.9 22.6 24.2 33.8 28.6 37.8 68.5

250 278 278 278 306 306 322 322 378

2 2 2 2 2.5 2.5 3 3 4

0.18 0.26 0.33 0.31 0.33 0.40 0.27 0.36 0.34

3.81 2.65 2.03 2.16 2.07 1.69 2.47 1.89 1.97

5.67 3.94 3.02 3.22 3.09 2.51 3.68 2.82 2.94

3.73 2.59 1.98 2.12 2.03 1.65 2.42 1.85 1.93

8.6 17.7 24.3 23 35.3 42.8 36.6 47.6 81

8.34 17.1 23.9 22.6 34.2 42.2 35.8 46.2 79.3

268 298 298

2 2 2

0.17 0.26 0.35

3.91 2.59 1.94

5.82 3.85 2.89

3.82 2.53 1.90

12.1 22.7 31

11.7 21.9 30.5

min

max

max

e

172 172 174 174 178

258 258 276 276 322

2 2 2.5 2.5 3

0.32 0.40 0.28 0.36 0.35

180 182 182 182 182 182 188 188 188

220 248 248 248 268 268 292 292 342

2 2 2 2 2 2 3 3 3

190 192 192 192 194 194 198 198 198

240 268 268 268 286 286 302 302 362

200 202 202 202 204 204 208 208 212 212 212 212

Y1

tapered bore

Note: An oil groove is provided for outer rings of bearings with an outer diameter (D dimension) of 320 mm or more. See page B-220 on dimensions. We can make bearings with oil hole or oil groove in the outer ring, per your request, for an outer diameter of 320mm or less. Such bearings are indicated by attaching "D1" to the end of the bearing number. (ex. 23032BD1) B-229


● Spherical Roller Bearings

B r r

φD

φd

φd

Cylindrical bore

Tapered bore

d 200 ∼ 280mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm d

kN rs min2)

Limiting speeds

Bearing numbers3)

static min-1

kgf

cylindrical bore

tapered1) bore

Cr

Cor

grease

oil

2 270 2 900 2 010 2 640 3 050

137 000 166 000 134 000 165 000 208 000

231 000 295 000 205 000 269 000 310 000

920 920 1 100 920 850

1 200 1 200 1 500 1 200 1 100

23140B 24140B 22240B 23240B 22340B

23140BK 24140BK30 22240BK 23240BK 22340BK

565 1 060 1 350 1 540 1 880 1 580 2 010 2 350

1 170 1 920 2 570 2 670 3 400 2 460 3 350 3 500

57 500 108 000 138 000 157 000 192 000 161 000 205 000 240 000

119 000 195 000 262 000 272 000 345 000 251 000 340 000 360 000

1 100 1 000 920 850 850 1 000 770 770

1 400 1 300 1 200 1 100 1 100 1 300 1 000 1 000

23944 23044B 24044B 23144B 24144B 22244B 23244B 22344B

23944K 23044BK 24044BK30 23144BK 24144BK30 22244BK 23244BK 22344BK

2.1 3 3 4 4 4 4 5

565 1 130 1 410 1 730 2 110 1 940 2 430 2 720

1 190 2 140 2 770 3 050 3 800 3 100 4 100 4 100

58 000 116 000 144 000 177 000 215 000 198 000 247 000 278 000

121 000 219 000 282 000 310 000 390 000 315 000 420 000 420 000

1 000 920 850 770 770 920 720 720

1 300 1 200 1 100 1 000 1 000 1 200 940 930

23948 23048B 24048B 23148B 24148B 22248B 23248B 22348B

23948K 23048BK 24048BK30 23148BK 24148BK30 22248BK 23248BK 22348BK

75 104 140 144 180 130 174 165

2.1 4 4 4 4 5 5 6

760 1 420 1 830 2 140 2 510 2 230 2 760 3 100

1 580 2 620 3 550 3 850 4 600 3 600 4 700 4 750

77 500 144 000 186 000 219 000 256 000 228 000 281 000 320 000

161 000 267 000 365 000 395 000 470 000 365 000 480 000 485 000

920 850 750 710 710 850 660 650

1 200 1 100 980 920 920 1 100 860 850

23952 23052B 24052B 23152B 24152B 22252B 23252B 22352B

23952K 23052BK 24052BK30 23152BK 24152BK30 22252BK 23252BK 22352BK

75 106 140 146 180 130

2.1 4 4 5 5 5

830 1 510 1 950 2 300 2 730 2 310

1 750 2 920 3 950 4 250 5 200 3 800

84 500 154 000 199 000 234 000 278 000 236 000

179 000 297 000 405 000 435 000 530 000 390 000

850 770 690 650 650 770

1 100 1 000 900 850 850 1 000

23956 23056B 24056B 23156B 24156B 22256B

23956K 23056BK 24056BK30 23156BK 24156BK30 22256BK

D

B

Cr

Cor

200

340 340 360 360 420

112 140 98 128 138

3 3 4 4 5

1 350 1 630 1 310 1 610 2 040

220

300 340 340 370 370 400 400 460

60 90 118 120 150 108 144 145

2.1 3 3 4 4 4 4 5

240

320 360 360 400 400 440 440 500

60 92 118 128 160 120 160 155

260

360 400 400 440 440 480 480 540

280

380 420 420 460 460 500

1)Bearings appended with "K" have a tapered bore ratio of 1:12; bearings appended with "K30" have a tapered bore ratio of 1:30. 2)Smallest allowable dimension for chamfer dimension r.

B-230


● Spherical Roller Bearings

ra Equivalent radial load dynamic Pr=XFr+YFa Fa Fa ≦e >e Fr Fr X Y X Y 1 Y1 0.67 Y2 static Por=Fr+YoFa For values of e, Y2 and Yo see the table below.

ra φDa

φda

Abutment and fillet dimensions mm da Da ras

Constant

Axial load factors

Mass (approx.) kg

Y2

Yo

cylindrical bore

2.05 1.64 2.45 1.88 1.98

3.05 2.44 3.64 2.79 2.95

2.00 1.60 2.39 1.83 1.94

43.3 53.4 44 57.2 93.2

42 52.6 43 55.5 91.2

0.19 0.26 0.34 0.33 0.41 0.27 0.36 0.33

3.62 2.59 1.97 2.07 1.66 2.46 1.85 2.06

5.39 3.85 2.94 3.09 2.47 3.66 2.76 3.07

3.54 2.53 1.93 2.03 1.62 2.40 1.81 2.02

13.1 29.9 40.2 53.3 67 60.4 80 117

12.7 28.8 39.6 51.6 66 59.1 77.6 115

2 2.5 2.5 3 3 3 3 4

0.16 0.25 0.32 0.32 0.40 0.28 0.37 0.32

4.13 2.69 2.09 2.11 1.69 2.43 1.83 2.10

6.15 4.01 3.12 3.15 2.51 3.62 2.72 3.13

4.04 2.63 2.05 2.07 1.65 2.38 1.79 2.06

14 33.4 43 65.8 82.2 81.7 108 148

13.6 32.2 42.3 63.8 80.9 80 105 145

348 382 382 422 422 458 458 512

2 3 3 3 3 4 4 5

0.19 0.26 0.34 0.33 0.41 0.28 0.37 0.32

3.53 2.63 1.96 2.05 1.63 2.45 1.83 2.13

5.26 3.92 2.91 3.06 2.43 3.64 2.72 3.18

3.45 2.57 1.91 2.01 1.60 2.39 1.79 2.09

24 48.5 65.2 91.4 114 106 141 183

23.3 46.8 64.1 88.6 112 104 137 179

368 402 402 438 438 478

2 3 3 4 4 4

0.17 0.25 0.33 0.32 0.39 0.26

3.88 2.73 2.06 2.13 1.73 2.57

5.78 4.06 3.07 3.18 2.58 3.83

3.79 2.67 2.02 2.09 1.69 2.51

26.4 52.4 69 97.7 120 112

25.6 50.6 67.9 94.6 118 110

min

max

max

e

214 214 218 218 222

326 326 342 342 398

2.5 2.5 3 3 4

0.33 0.41 0.28 0.36 0.34

232 234 234 238 238 238 238 242

288 326 326 352 352 382 382 438

2 2.5 2.5 3 3 3 3 4

252 254 254 258 258 258 258 262

308 346 346 382 382 422 422 478

272 278 278 278 278 282 282 288 292 298 298 302 302 302

Y1

Note: Please refer to page B-220 for outer ring oil inlet and oil groove dimensions.

B-231

tapered bore


● Spherical Roller Bearings

B r r

φD

φd

φd

Cylindrical bore

Tapered bore

d 280 ∼ 380mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm

kN

d

D

B

280

500 580

176 175

300

420 460 460 500 500 540 540 620

rs min2)

Limiting speeds

Bearing numbers

static min-1

kgf

tapered1) bore

oil

cylindrical bore

610 600

790 780

23256B 22356B

23256BK 22356BK

237 000 365 000 505 000 510 000 650 000 440 000 615 000 550 000

770 720 650 600 600 720 560 550

1 000 940 840 780 780 930 730 720

23960 23060B 24060B 23160B 24160B 22260B 23260B 22360B

23960K 23060BK 24060BK30 23160BK 24160BK30 22260BK 23260BK 22360BK

116 000 200 000 255 000 320 000 390 000 315 000 410 000

251 000 395 000 530 000 590 000 745 000 515 000 720 000

720 680 600 560 560 660 520

930 880 780 730 730 860 680

23964 23064B 24064B 23164B 24164B 22264B 23264B

23964K 23064BK 24064BK30 23164BK 24164BK30 22264BK 23264BK

2 650 4 550 6 200 6 600 8 950 8 000

124 000 235 000 305 000 365 000 470 000 455 000

270 000 465 000 630 000 670 000 910 000 815 000

650 630 550 520 520 490

870 820 720 680 680 630

23968 23068B 24068B 23168B 24168B 23268B

23968K 23068BK 24068BK30 23168BK 24168BK30 23268BK

1 320 2 370 3 100 3 750 4 600 4 850

2 930 4 700 6 600 7 050 9 150 8 700

135 000 242 000 320 000 385 000 470 000 495 000

298 000 480 000 675 000 715 000 935 000 885 000

630 590 520 490 490 450

820 770 680 630 630 590

23972 23072B 24072B 23172B 24172B 23272B

23972K 23072BK 24072BK30 23172BK 24172BK30 23272BK

1 560 2 510 3 250 3 900 4 800

3 550 5 150 7 100 7 500 9 650

159 000 256 000 330 000 400 000 490 000

360 000 525 000 725 000 765 000 985 000

590 550 490 450 450

770 720 640 590 590

23976 23076B 24076B 23176B 24176B

23976K 23076BK 24076BK30 23176BK 24176BK30

Cr

Cor

Cr

Cor

5 6

2 930 3 500

5 150 5 350

298 000 360 000

525 000 545 000

90 118 160 160 200 140 192 185

3 4 4 5 5 5 5 7.5

1 110 1 890 2 450 2 750 3 300 2 670 3 450 3 600

2 320 3 550 4 950 5 000 6 400 4 350 6 000 5 400

113 000 193 000 250 000 280 000 340 000 272 000 355 000 365 000

320

440 480 480 540 540 580 580

90 121 160 176 218 150 208

3 4 4 5 5 5 5

1 140 1 960 2 510 3 100 3 850 3 100 4 000

2 460 3 850 5 200 5 800 7 300 5 050 7 050

340

460 520 520 580 580 620

90 133 180 190 243 224

3 5 5 5 5 6

1 220 2 310 3 000 3 600 4 600 4 450

360

480 540 540 600 600 650

90 134 180 192 243 232

3 5 5 5 5 6

380

520 560 560 620 620

106 135 180 194 243

4 5 5 5 5

grease

1)Bearings appended with "K" have a tapered bore ratio of 1:12; bearings appended with "K30" have a tapered bore ratio of 1:30. 2)Smallest allowable dimension for chamfer dimension r.

B-232


● Spherical Roller Bearings

ra Equivalent radial load dynamic Pr=XFr+YFa Fa Fa ≦e >e Fr Fr X Y X Y 1 Y1 0.67 Y2 static Por=Fr+YoFa For values of e, Y2 and Yo see the table below.

ra φDa

φda

Abutment and fillet dimensions mm da Da ras

Constant

Axial load factors

Mass (approx.) kg Yo

1.90 2.16

2.83 3.22

1.86 2.12

150 224

145 220

0.20 0.25 0.34 0.32 0.40 0.26 0.36 0.32

3.34 2.66 1.97 2.11 1.69 2.57 1.88 2.13

4.98 3.96 2.93 3.15 2.51 3.83 2.79 3.17

3.27 2.60 1.92 2.07 1.65 2.51 1.83 2.08

40 72.4 98 131 161 141 193 270

38.7 70.2 96.4 127 159 138 187 265

2.5 3 3 4 4 4 4

0.19 0.25 0.33 0.33 0.40 0.26 0.36

3.50 2.73 2.06 2.06 1.67 2.57 1.86

5.21 4.06 3.07 3.07 2.48 3.83 2.77

3.42 2.67 2.02 2.02 1.63 2.51 1.82

43 78.2 103 167 207 172 243

41.7 75.5 101 162 204 168 236

446 498 498 558 558 592

2.5 4 4 4 4 5

0.17 0.25 0.34 0.33 0.42 0.37

3.91 2.68 1.98 2.05 1.61 1.84

5.83 3.99 2.95 3.06 2.39 2.75

3.83 2.62 1.94 2.01 1.57 1.80

44.7 104 140 210 269 300

43.3 100 138 204 265 291

374 382 382 382 382 388

466 518 518 578 578 622

2.5 4 4 4 4 5

0.17 0.24 0.33 0.32 0.40 0.36

3.99 2.78 2.06 2.11 1.67 1.87

5.93 4.14 3.07 3.15 2.48 2.78

3.90 2.72 2.02 2.07 1.63 1.83

47.2 110 147 222 281 339

45.7 106 145 215 277 329

398 402 402 402 402

502 538 538 598 598

3 4 4 4 4

0.19 0.24 0.30 0.31 0.39

3.54 2.87 2.23 2.16 1.73

5.27 4.27 3.32 3.22 2.58

3.46 2.80 2.18 2.12 1.69

69.9 115 153 235 292

67.7 111 150 228 287

min

max

302 308

478 552

4 5

0.36 0.31

314 318 318 322 322 322 322 336

406 442 442 478 478 518 518 584

2.5 3 3 4 4 4 4 6

334 338 338 342 342 342 342

426 462 462 518 518 558 558

354 362 362 362 362 368

Y1

tapered bore

Y2

max

e

cylindrical bore

Note: Please refer to page B-220 for outer ring oil inlet and oil groove dimensions.

B-233


● Spherical Roller Bearings

B r r

φD

φd

φd

Cylindrical bore

Tapered bore

d 380 ∼ 500mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm

kN

Limiting speeds

Bearing numbers

static min-1

kgf

tapered1) bore

oil

cylindrical bore

430

550

23276B

23276BK

161 000 370 000 305 000 615 000 390 000 855 000 425 000 820 000 520 000 1 060 000 595 000 1 080 000

550 520 460 430 430 400

720 680 600 560 560 520

23980 23080B 24080B 23180B 24180B 23280B

23980K 23080BK 24080BK30 23180BK 24180BK30 23280BK

3 850 6 400 8 450 9 950 12 200 12 000

166 000 390 000 315 000 650 000 395 000 865 000 530 000 1 020 000 625 000 1 240 000 665 000 1 230 000

530 490 440 410 410 380

690 640 570 530 530 490

23984 23084B 24084B 23184B 24184B 23284B

23984K 23084BK 24084BK30 23184BK 24184BK30 23284BK

2 030 3 300 4 300 5 200 6 450 6 900

4 700 6 850 9 450 10 100 13 100 12 800

207 000 480 000 335 000 695 000 440 000 960 000 530 000 1 030 000 660 000 1 330 000 705 000 1 310 000

500 470 420 390 390 360

650 610 540 500 500 470

23988 23088B 24088B 23188B 24188B 23288B

23988K 23088BK 24088BK30 23188BK 24188BK30 23288BK

4 6 6 7.5 7.5 7.5

2 100 3 600 4 600 5 700 7 100 7 750

4 950 7 450 10 200 11 400 14 500 14 500

214 000 365 000 470 000 585 000 725 000 790 000

505 000 760 000 1 040 000 1 160 000 1 480 000 1 470 000

480 450 390 360 360 340

620 580 510 470 470 440

23992 23092B 24092B 23192B 24192B 23292B

23992K 23092BK 24092BK30 23192BK 24192BK30 23292BK

128 165 218 248 308 310

5 6 6 7.5 7.5 7.5

2 330 3 650 4 650 6 200 7 450 8 300

5 500 7 700 10 500 12 300 15 300 15 500

238 000 370 000 475 000 635 000 760 000 845 000

565 000 785 000 1 070 000 1 260 000 1 560 000 1 580 000

450 420 380 350 350 320

590 550 490 450 450 420

23996 23096B 24096B 23196B 24196B 23296B

23996K 23096BK 24096BK30 23196BK 24196BK30 23296BK

128 167

5 6

2 370 3 850

5 600 8 300

242 000 390 000

570 000 845 000

430 410

560 530

239/500 239/500K 230/500B 230/500BK

d

D

B

380

680

240

400

540 600 600 650 650 720

rs min2)

Cr

Cor

Cr

Cor

6

5 200

9 650

530 000

985 000

106 148 200 200 250 256

4 5 5 6 6 6

1 580 2 980 3 850 4 200 5 100 5 850

3 650 6 050 8 400 8 050 10 300 10 600

420

560 620 620 700 700 760

106 150 200 224 280 272

4 5 5 6 6 7.5

1 630 3 100 3 850 5 200 6 150 6 550

440

600 650 650 720 720 790

118 157 212 226 280 280

4 6 6 6 6 7.5

460

620 680 680 760 760 830

118 163 218 240 300 296

480

650 700 700 790 790 870

500

670 720

grease

1)Bearings appended with "K" have a tapered bore ratio of 1:12; bearings appended with "K30" have a tapered bore ratio of 1:30. 2)Smallest allowable dimension for chamfer dimension r.

B-234


● Spherical Roller Bearings

ra Equivalent radial load dynamic Pr=XFr+YFa Fa Fa ≦e >e Fr Fr X Y X Y 1 Y1 0.67 Y2 static Por=Fr+YoFa For values of e, Y2 and Yo see the table below.

ra φDa

φda

Abutment and fillet dimensions mm da Da ras

Constant

Axial load factors

Mass (approx.) kg Yo

1.89

2.82

1.85

380

369

0.18 0.24 0.32 0.31 0.38 0.37

3.71 2.80 2.09 2.21 1.77 1.81

5.53 4.16 3.11 3.28 2.63 2.69

3.63 2.73 2.04 2.16 1.73 1.77

73 149 202 264 329 457

70.7 144 200 256 324 443

3 4 4 5 5 6

0.17 0.24 0.32 0.32 0.40 0.36

3.95 2.85 2.13 2.11 1.69 1.86

5.88 4.24 3.18 3.15 2.51 2.77

3.86 2.78 2.09 2.07 1.65 1.82

76.2 157 210 354 440 544

73.8 152 207 343 433 528

582 622 622 692 692 754

3 5 5 5 5 6

0.18 0.24 0.32 0.31 0.39 0.36

3.66 2.85 2.11 2.15 1.75 1.88

5.46 4.24 3.15 3.21 2.61 2.80

3.58 2.78 2.07 2.11 1.71 1.84

101 181 245 370 456 600

98 175 241 358 449 582

478 488 488 496 496 496

602 652 652 724 724 794

3 5 5 6 6 6

0.17 0.23 0.31 0.31 0.39 0.36

3.95 2.88 2.15 2.14 1.71 1.87

5.88 4.29 3.21 3.19 2.55 2.78

3.86 2.82 2.11 2.10 1.67 1.83

107 206 276 443 550 704

104 200 272 429 541 683

502 508 508 516 516 516

628 672 672 754 754 834

4 5 5 6 6 6

0.18 0.23 0.30 0.31 0.39 0.36

3.85 2.94 2.22 2.15 1.74 1.87

5.73 4.38 3.30 3.21 2.59 2.78

3.76 2.88 2.17 2.11 1.70 1.83

123 217 285 492 608 814

119 209 280 477 600 790

522 528

648 692

4 5

0.17 0.23

4.02 2.98

5.98 4.44

3.93 2.91

131 226

127 218

min

max

408

652

5

0.36

418 422 422 428 428 428

522 578 578 622 622 692

3 4 4 5 5 5

438 442 442 448 448 456

542 598 598 672 672 724

458 468 468 468 468 476

Y1

tapered bore

Y2

max

e

cylindrical bore

Note: Please refer to page B-220 for outer ring oil inlet and oil groove dimensions.

B-235


● Spherical Roller Bearings

B r r

φD

φd

φd

Cylindrical bore

Tapered bore

d 500 ∼ 670mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm

kN rs min2)

d

D

B

Cr

500

720 830 830 920

218 264 325 336

6 7.5 7.5 7.5

4 750 6 950 8 050 9 400

530

710 780 780 870 870 980

136 185 250 272 335 355

5 6 6 7.5 7.5 9.5

560

750 820 820 920 920 1 030

140 195 258 280 355 365

600

800 870 870 980 980 1 090

Limiting speeds min-1

kgf Cor

10 900 13 700 16 700 17 800

Bearing numbers

static

Cr

Cor

grease

oil

cylindrical bore

tapered1) bore

485 000 705 000 825 000 960 000

1 110 000 1 400 000 1 700 000 1 820 000

350 330 330 310

460 430 430 400

240/500B 231/500B 241/500B 232/500B

240/500BK30 231/500BK 241/500BK30 232/500BK

2 640 4 400 5 600 7 000 8 300 10 400

6 450 269 000 9 350 445 000 12 700 570 000 14 200 715 000 17 400 850 000 19 800 1 060 000

655 000 955 000 1 290 000 1 450 000 1 770 000 2 020 000

400 380 330 310 310 280

520 490 430 400 400 370

239/530 230/530B 240/530B 231/530B 241/530B 232/530B

239/530K 230/530BK 240/530BK30 231/530BK 241/530BK30 232/530BK

5 6 6 7.5 7.5 9.5

2 830 4 800 6 100 7 650 9 950 11 100

6 700 288 000 10 500 490 000 14 100 620 000 15 500 780 000 20 800 1 010 000 21 100 1 130 000

680 000 1 070 000 1 440 000 1 580 000 2 120 000 2 150 000

380 350 310 280 280 260

490 450 400 370 370 340

239/560 230/560B 240/560B 231/560B 241/560B 232/560B

239/560K 230/560BK 240/560BK30 231/560BK 241/560BK30 232/560BK

150 200 272 300 375 388

5 6 6 7.5 7.5 9.5

3 150 5 250 6 450 9 000 10 700 12 200

7 800 325 000 12 000 535 000 15 600 655 000 18 400 920 000 23 200 1 090 000 23 700 1 240 000

795 000 1 220 000 1 590 000 1 880 000 2 360 000 2 420 000

350 310 280 260 260 250

450 420 370 340 340 320

239/600 230/600B 240/600B 231/600B 241/600B 232/600B

239/600K 230/600BK 240/600BK30 231/600BK 241/600BK30 232/600BK

630

850 920 920 1 030 1 030 1 150

165 212 290 315 400 412

6 7.5 7.5 7.5 7.5 12

3 700 5 900 7 550 9 600 11 600 13 700

9 250 375 000 13 000 600 000 17 900 770 000 19 900 975 000 25 000 1 180 000 26 800 1 400 000

945 000 1 330 000 1 830 000 2 030 000 2 550 000 2 740 000

320 310 270 250 250 230

420 400 350 320 320 300

239/630 230/630B 240/630B 231/630B 241/630B 232/630B

239/630K 230/630BK 240/630BK30 231/630BK 241/630BK30 232/630BK

670

900 980 980 1 090 1 090 1 220

170 230 308 336 412 438

6 7.5 7.5 7.5 7.5 12

4 100 6 550 8 650 11 000 12 700 16 100

10 300 420 000 14 600 665 000 20 600 885 000 22 800 1 120 000 28 000 1 300 000 32 000 1 640 000

1 050 000 1 490 000 2 100 000 2 330 000 2 850 000 3 250 000

300 280 250 230 230 220

390 360 320 300 300 280

239/670 230/670B 240/670B 231/670B 241/670B 232/670B

239/670K 230/670BK 240/670BK30 231/670BK 241/670BK30 232/670BK

1)Bearings appended with "K" have a tapered bore ratio of 1:12; bearings appended with "K30" have a tapered bore ratio of 1:30. 2)Smallest allowable dimension for chamfer dimension r.

B-236


● Spherical Roller Bearings

ra Equivalent radial load dynamic Pr=XFr+YFa Fa Fa ≦e >e Fr Fr X Y X Y 1 Y1 0.67 Y2 static Por=Fr+YoFa For values of e, Y2 and Yo see the table below.

ra φDa

φda

Abutment and fillet dimensions mm da Da ras

Constant

Axial load factors

Mass (approx.) kg

Y2

Yo

cylindrical bore

2.28 2.12 1.72 1.74

3.40 3.16 2.57 2.59

2.23 2.08 1.69 1.70

295 584 716 1 000

290 566 705 971

0.17 0.22 0.30 0.30 0.38 0.39

3.94 3.03 2.24 2.22 1.79 1.74

5.87 4.52 3.33 3.30 2.67 2.59

3.86 2.97 2.19 2.17 1.75 1.70

157 306 413 653 800 1 200

152 295 406 633 788 1 170

4 5 5 6 6 8

0.16 0.22 0.30 0.30 0.39 0.36

4.09 3.03 2.29 2.27 1.75 1.88

6.09 4.51 3.40 3.38 2.61 2.80

4.00 2.96 2.24 2.22 1.71 1.84

182 353 467 752 948 1 360

176 340 459 729 934 1 320

778 842 842 944 944 1 046

4 5 5 6 6 8

0.18 0.21 0.29 0.30 0.37 0.36

3.85 3.17 2.33 2.22 1.81 1.86

5.73 4.72 3.47 3.30 2.70 2.77

3.76 3.10 2.28 2.17 1.77 1.82

218 400 544 908 1 130 1 540

211 386 535 880 1 110 1 490

658 666 666 666 666 684

822 884 884 994 994 1 096

5 6 6 6 6 10

0.18 0.22 0.30 0.30 0.38 0.36

3.66 3.14 2.28 2.27 1.78 1.87

5.45 4.67 3.40 3.38 2.66 2.78

3.58 3.07 2.23 2.22 1.74 1.83

277 481 657 1 050 1 330 1 900

268 464 646 1 020 1 310 1 840

698 706 706 706 706 724

872 944 944 1 054 1 054 1 166

5 6 6 6 6 10

0.18 0.22 0.29 0.30 0.37 0.36

3.76 3.07 2.29 2.22 1.83 1.89

5.59 4.57 3.41 3.30 2.73 2.81

3.67 3.00 2.24 2.17 1.79 1.85

317 594 794 1 250 1 530 2 270

307 573 781 1 210 1 510 2 200

e

min

max

max

528 536 536 536

692 794 794 884

5 6 6 6

0.30 0.32 0.39 0.39

552 558 558 566 566 574

688 752 752 834 834 936

4 5 5 6 6 8

582 588 588 596 596 604

728 792 792 884 884 986

622 628 628 636 636 644

Y1

Note: Please refer to page B-220 for outer ring oil inlet and oil groove dimensions.

B-237

tapered bore


● Spherical Roller Bearings

B r r

φD

φd

φd

Cylindrical bore

Tapered bore

d 710 ∼ 1060mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm d

D

kN B

rs min2)

Cr

Limiting speeds min-1

kgf Cor

Bearing numbers

static

Cr

Cor

grease

oil

cylindrical bore

tapered1) bore

710

950 1 030 1 030 1 150 1 150 1 280

180 236 315 345 438 450

6 7.5 7.5 9.5 9.5 12

4 450 7 200 9 300 11 600 14 500 16 300

11 500 16 200 22 500 24 900 32 000 32 500

450 000 730 000 945 000 1 190 000 1 470 000 1 660 000

1 170 000 1 650 000 2 300 000 2 540 000 3 250 000 3 300 000

280 260 230 220 220 200

370 340 300 280 280 260

239/710 230/710B 240/710B 231/710B 241/710B 232/710B

239/710K 230/710BK 240/710BK30 231/710BK 241/710BK30 232/710BK

750

1 000 1 090 1 090 1 220 1 360

185 250 335 365 475

6 7.5 7.5 9.5 15

5 000 8 150 10 100 12 800 18 200

13 000 18 300 24 600 27 200 36 500

510 000 835 000 1 030 000 1 310 000 1 860 000

1 330 000 1 860 000 2 500 000 2 780 000 3 750 000

260 250 220 200 180

340 320 280 260 240

239/750 230/750B 240/750B 231/750B 232/750B

239/750K 230/750BK 240/750BK30 231/750BK 232/750BK

800

1 060 1 150 1 150 1 280

195 258 345 375

6 7.5 7.5 9.5

5 400 8 400 11 200 14 400

13 700 19 500 27 800 31 000

550 000 860 000 1 140 000 1 460 000

1 400 000 1 990 000 2 840 000 3 150 000

240 220 200 180

310 290 260 240

239/800 230/800B 240/800B 231/800B

239/800K 230/800BK 240/800BK30 231/800BK

850

1 120 1 220 1 220 1 360

200 272 365 400

6 7.5 7.5 12

5 850 9 750 12 500 15 500

15 100 22 700 31 500 34 000

595 000 995 000 1 270 000 1 580 000

1 540 000 2 310 000 3 200 000 3 500 000

220 210 180 170

290 270 240 220

239/850 230/850B 240/850B 231/850B

239/850K 230/850BK 240/850BK30 231/850BK

900

1 180 1 280 1 280 1 420

206 280 375 412

6 7.5 7.5 12

6 650 10 300 13 200 16 800

17 300 24 700 33 500 38 000

675 000 1 050 000 1 350 000 1 720 000

1 770 000 2 520 000 3 450 000 3 850 000

210 190 170 150

270 250 220 200

239/900 230/900B 240/900B 231/900B

239/900K 230/900BK 240/900BK30 231/900BK

950

1 250 1 360 1 360

224 300 412

7.5 7.5 7.5

7 750 11 500 15 500

20 500 28 400 40 000

790 000 2 090 000 1 180 000 2 900 000 1 580 000 4 100 000

190 180 160

250 230 210

239/950 239/950K 230/950B 230/950BK 240/950B 240/950BK30

1000

1 320 1 420 1 420

236 308 412

7.5 7.5 7.5

8 600 12 400 16 000

22 700 30 000 42 000

875 000 2 310 000 1 260 000 3 050 000 1 640 000 4 250 000

180 170 150

230 220 190

239/1000 239/1000K 230/1000B 230/1000BK 240/1000B 240/1000BK30

1060

1 400 1 500 1 500

250 325 438

7.5 9.5 9.5

9 300 13 600 17 800

24 700 33 500 47 000

950 000 2 520 000 1 390 000 3 400 000 1 810 000 4 800 000

160 150 140

210 200 180

239/1060 239/1060K 230/1060B 230/1060BK 240/1060B 240/1060BK30

1)Bearings appended with "K" have a tapered bore ratio of 1:12; bearings appended with "K30" have a tapered bore ratio of 1:30. 2)Smallest allowable dimension for chamfer dimension r.

B-238


● Spherical Roller Bearings

ra Equivalent radial load dynamic Pr=XFr+YFa Fa Fa ≦e >e Fr Fr X Y X Y 1 Y1 0.67 Y2 static Por=Fr+YoFa For values of e, Y2 and Yo see the table below.

ra φDa

φda

Abutment and fillet dimensions mm da Da ras

Constant

Axial load factors

Mass (approx.) kg

Y2

Yo

cylindrical bore

3.85 3.02 2.36 2.32 1.80 1.91

5.73 4.50 3.51 3.45 2.69 2.84

3.76 2.96 2.31 2.27 1.76 1.87

375 663 884 1 420 1 800 2 540

363 640 870 1 380 1 770 2 470

0.17 0.21 0.29 0.29 0.35

3.90 3.20 2.35 2.32 1.92

5.81 4.76 3.49 3.45 2.86

3.81 3.13 2.29 2.27 1.88

412 790 1 060 1 700 3 050

399 763 1 040 1 650 2 960

5 6 6 8

0.17 0.21 0.28 0.29

4.05 3.15 2.41 2.32

6.04 4.69 3.59 3.45

3.96 3.08 2.36 2.27

487 890 1 190 1 890

471 859 1 170 1 830

1 092 1 184 1 184 1 306

5 6 6 10

0.16 0.20 0.28 0.28

4.25 3.32 2.42 2.37

6.32 4.95 3.61 3.54

4.15 3.25 2.37 2.32

550 1 050 1 410 2 270

532 1 010 1 390 2 200

928 936 936 954

1 152 1 244 1 244 1 366

5 6 6 10

0.16 0.20 0.27 0.28

4.32 3.32 2.48 2.42

6.44 4.95 3.70 3.60

4.23 3.25 2.43 2.36

623 1 170 1 570 2 500

603 1 130 1 540 2 420

986 986 986

1 214 1 324 1 324

6 6 6

0.16 0.21 0.28

4.20 3.26 2.39

6.26 4.85 3.56

4.11 3.18 2.34

774 1 430 1 970

749 1 380 1 940

1 036 1 036 1 036

1 284 1 384 1 384

6 6 6

0.16 0.20 0.27

4.21 3.37 2.51

6.26 5.02 3.73

4.11 3.29 2.45

916 1 580 2 110

887 1 520 2 080

1 096 1 104 1 104

1 364 1 456 1 456

6 8 8

0.16 0.20 0.27

4.28 3.36 2.49

6.37 5.00 3.71

4.19 3.28 2.44

1 090 1 850 2 450

1 060 1 790 2 140

max

max

e

738 746 746 754 754 764

922 994 994 1 106 1 106 1 226

5 6 6 8 8 10

0.18 0.22 0.29 0.29 0.37 0.35

778 786 786 794 814

972 1 054 1 054 1 176 1 296

5 6 6 8 12

828 836 836 844

1 032 1 114 1 114 1 236

878 886 886 904

min

Y1

Note: Please refer to page B-220 for outer ring oil inlet and oil groove dimensions.

B-239

tapered bore


● Spherical Roller Bearings

B r r

φD

φd

φd

Cylindrical bore

Tapered bore

d 1120 ∼ 1400mm Boundary dimensions

Basic load ratings static dynamic

dynamic mm d

D

kN B

rs min2)

Cr

Limiting speeds min-1

kgf Cor

Bearing numbers

static

Cr

Cor

grease

oil

cylindrical bore

tapered1) bore

1120

1 460 1 580 1 580

250 345 462

7.5 9.5 9.5

9 850 15 600 19 500

26 700 39 000 52 500

1 000 000 2 720 000 1 590 000 4 000 000 1 990 000 5 350 000

150 150 120

200 190 160

239/1120 239/1120K 230/1120B 230/1120BK 240/1120B 240/1120BK30

1180

1 540

272

7.5

11 000

29 800

1 120 000 3 050 000

140

180

239/1180

239/1180K

1250

1 630

280

7.5

12 100

33 500

1 230 000 3 400 000

120

160

239/1250

239/1250K

1320

1 720

300

7.5

13 600

38 000

1 390 000 3 900 000

120

150

239/1320

239/1320K

1400

1 820

315

9.5

15 100

43 000

1 540 000 4 400 000

100

130

239/1400

239/1400K

1)"K" indicates bearings have tapered bore with a taper ratio of 1: 12. 2)Smallest allowable dimension for chamfer dimension r.

B-240


● Spherical Roller Bearings

ra Equivalent radial load dynamic Pr=XFr+YFa Fa Fa ≦e >e Fr Fr X Y X Y 1 Y1 0.67 Y2 static Por=Fr+YoFa For values of e, Y2 and Yo see the table below.

ra φDa

φda

Abutment and fillet dimensions mm da Da ras

Constant

Mass (approx.) kg

Y2

Yo

cylindrical bore

4.42 3.29 2.50

6.58 4.80 3.72

4.32 3.21 2.44

1 140 2 160 2 890

1 100 2 090 2 840

0.15

4.40

6.55

4.30

1 390

1 340

6

0.15

4.42

6.58

4.32

1 600

1 550

1 684

6

0.16

4.34

6.46

4.24

1 900

1 840

1 776

8

0.15

4.39

6.54

4.29

2 230

2 160

max

max

e

1 156 1 164 1 164

1 424 1 536 1 536

6 8 8

0.15 0.21 0.27

1 216

1 504

6

1 286

1 594

1 356 1 444

min

Axial load factors

Y1

Note: Please refer to page B-220 for outer ring oil inlet and oil groove dimensions.

B-241

tapered bore


● Adapter (For spherical roller bearings) B2 ra

Ba

B1 φd1 φd2

φdb φda

φDa

d1 35 ∼ 70mm Boundary dimensions

Bearing numbers

Mass1)

Abutment and fillet dimensions

mm

mm da

db

Ba

min

max

min

d1

B1

d2

B2

35

36 36 46

58 58 58

10 10 10

LH-22208CK;H 308X 21308CK;H 308X 22308CK;H2308X

44 44 45

50 54 52

5 5 5

40

39 39 50

65 65 65

11 11 11

LH-22209CK;H 309X 21309CK;H 309X 22309CK;H2309X

49 49 50

57 61 58

45

42 42 55

70 70 70

12 12 12

LH-22210CK;H 310X 21310CK;H 310X 22310CK;H2310X

54 54 56

50

45 45 45 59

75 75 75 75

12 12 12 12

LH-22211EK;H 311X LH-22211BK;H 311X 21311K ;H 311X 22311BK;H2311X

55

47 47 47 62

80 80 80 80

13 13 13 13

60

50 50 50 65

85 85 85 85

65

55 55 55 73

70

59 59 59 78

kg Da min

ras max

max

(approx.)

― ― ―

73 81.5 81.5

1 1.5 1.5

0.189 0.189 0.224

8 5 5

― ― ―

78 91.5 91.5

1 1.5 1.5

0.248 0.248 0.28

63 67 65

10 5 5

― ― ―

83 100 100

1 2 2

0.303 0.303 0.362

60 60 60 61

67 67 73 71

11 11 6 6

89.5 ― ― ―

91.5 91.5 110 110

1.5 1.5 2 2

0.345 0.345 0.345 0.42

LH-22212EK;H 312X LH-22212BK;H 312X 21312K ;H 312X 22312BK;H2312X

65 65 65 66

72 72 79 77

9 9 5 5

98 ― ― ―

101.5 101.5 118 118

1.5 1.5 2 2

0.394 0.394 0.394 0.481

14 14 14 14

LH-22213EK;H 313X LH-22213BK;H 313X 21313K ;H 313X 22313BK;H2313X

70 70 70 72

78.5 78.5 85 84

8 9 5 5

107 ― ― ―

111.5 111.5 128 128

1.5 1.5 2 2

0.458 0.458 0.458 0.557

98 98 98 98

15 15 15 15

LH-22215EK;H 315X LH-22215BK;H 315X 21315K ;H 315X 22315BK;H2315X

80 80 80 82

89 89 97 96

12 12 5 5

117.5 ― ― ―

121.5 121.5 148 148

1.5 1.5 2 2

0.831 0.831 0.831 1.05

105 105 105 105

17 17 17 17

LH-22216EK;H 316X LH-22216BK;H 316X 21316K ;H 316X 22316BK;H2316X

86 86 86 87

94.5 94.5 103 103

12 12 5 5

125.5 ― ― ―

130 130 158 158

2 2 2 2

1.03 1.03 1.03 1.28

1)Indicates adapter mass. Note: 1. Please refer to page B-222 to B-225 for bearing dimensions, rated loads, and mass. 2. Please refer to page C-2 to C-10 and C-12 to C-14 for adapter locknut and washer dimensions. 3. Adapter numbers with the suffix "X" signify narrow slit type adapters, and use washers with straight inner tabs.

B-242


● Adapter (For spherical roller bearings) B2 ra

Ba

B1 φd1 φd2

φdb φda

φDa

d1 75 ∼ 115mm Boundary dimensions

Bearing numbers

mm

mm da

db

Ba

min

max

min

kg Da

d1

B1

d2

B2

75

63 63 63 82

110 110 110 110

18 18 18 18

LH-22217EK;H 317X LH-22217BK;H 317X 21317K ;H 317X 22317BK;H2317X

91 91 91 94

100.5 100.5 110 110

12 12 6 6

135 ― ― ―

80

65 65 86 65 86

120 120 120 120 120

18 18 18 18 18

LH-22218EK;H 318X LH-22218BK;H 318X 23218BK;H2318X 21318K ;H 318X 22318BK;H2318X

96 96 99 96 99

107.5 107.5 110 116 117

10 10 18 6 6

85

68 68 90

125 125 125

19 19 19

22219BK;H 319X 21319K ;H 319X 22319BK;H2319X

102 102 105

117 123 123

90

71 97 71 97

130 130 130 130

20 20 20 20

22220BK;H 320X 23220BK;H2320X 21320K ;H 320X 22320BK;H2320X

107 110 107 110

100

81 77 105 77 105

145 145 145 145 145

21 21 21 21 21

23122BK;H3122X 22222BK;H 322X 23222BK;H2322X 21322K ;H 322X 22322BK;H2322X

110

72 88 88 112 112

145 155 155 155 155

22 22 22 22 22

80 92 92 121

155 165 165 165

23 23 23 23

115

Mass1)

Abutment and fillet dimensions

min

ras max

(approx.)

140 140 166 166

2 2 2.5 2.5

1.