Spur Gears
4/12/00
3:56 PM
Page 1
Stock Gears
Spur Gears
Miter Gears
Bevel Gears
Worm and Worm Gears
Gear Rack
Spur Gears
4/12/00
3:56 PM
Page 1
“Made-To-Order” Gears
1
Spur Gears
4/12/00
3:56 PM
Page 2
Stock Gears Numbering System Letters (Prefix) Indicate Material and Type Gear. Letters (Suffix) Indicate Hardened, Number of Threads, Direction of Rotation and KW and SS. Numbers Indicate Pitch, Number of Teeth, and Ratio (Suffix).
Spur Gears S=Steel TS=Steel 20° C=Cast TC=Cast 20° H=Hardened Teeth NM=Non-Metallic
Examples S620-141⁄2° (Steel 6P 20T-141⁄2°PA) TS620-20° (Steel 6P 20T-20°PA) C660-141⁄2° (Cast 6P 60T-141⁄2°PA) TC660-20° (Cast 6P 60T-20°PA) S620H-141⁄2° (Steel 6P 20T-Hardened 141⁄2°PA) NM620-141⁄2° (Non-Metallic 6P 20T-141⁄2°PA)
Note: Pressure Angle is Shown as a Suffix to Part Number of All Our Spur Gears.
Rack R=Rack — Steel RA=Rack — Steel Heavy Backing T=Rack — Steel 20° R20=Rack — Steel 20° Wide Face
Bevel Gears B=Bevel — Cast Iron Gears B=Bevel — Steel Pinions BS=Bevel — Steel Gears BS=Bevel — Steel Pinions
Examples R-6X2 (141⁄2° STD Backing 6PX2′ Long) RA-6X4 (141⁄2° Heavy Backing 6PX4′ Long) TR-6X6 (20° STD Width 6PX6′ Long) R20-6X6 (20° Wide Face 6PX6′ Long)
Examples B1040-2 (Cast 10P 40T 2:1 Ratio) B1020-2 (Steel 10P 20T 2:1 Ratio) BS1040-2 (Steel 10P 40T 2:1 Ratio) BS1020-2 (Steel 10P 20T 2:1 Ratio)
Note: B Steel Pinions May Run With BS Gears of Same Ratio
Miter Gears M=Miter — Steel Gears A or B=Larger Bore (Suffix) HM=Miter-Hardened Teeth K=KW & SS
Worm W=Worm — Steel WH=Worm — Steel With Hub Projection WG=Worm — Steel Hardened Ground Threads WHG=Worm — Steel Hardened Ground Threads With Hub Projection L=(Prefix) Longer Face D or Q=(Suffix) Double or Quadruple Thread R=Right Hand
Worm Gears W=Worm Gear — Cast Iron WB=Worm Gear — Bronze D or Q=Double or Quadruple Thread (Suffix) R=Right Hand (Suffix)
2
Examples M824 (Steel 8P 24T) M824A (Steel 8P 24T Larger Bore) M2424BR (Brass 24P 24T) HM1020 (Steel-Hardened Teeth 10P 20T) HMK1020 (Steel-Hardened 10P 20T With KW & SS)
Examples W6R (Steel 6P Right Hand) WH6R (Steel with Hub Projection 6P Right Hand) WG6R (Steel-Hardened Ground Threads 6P Right Hand WHG6R (Steel with Hub Projection Hardened Ground Threads 6P Right Hand) LW6R Steel Long Face 6P Right Hand) W6DR (Steel 6P Double Thread Right Hand)
Examples W660R (Cast Iron 6P 60T Right Hand) WB660R (Bronze 6P 60T Right Hand) W660DR (Cast Iron 6P 60T Double Thread Right Hand)
Spur Gears
4/12/00
3:56 PM
Page 3
Styles of Spur Gears Martin Stock Spur Gears are available in five different styles. Steel Gears are furnished in plain style and plain style with hub. Cast gears are furnished, plain with hub, web with lightening holes, and spoke. Cast gears are machined on all operating surfaces. Martin cast gears are cast with larger hub to provide extra strength and to allow for larger bores.
Type A Plain Without Hubs All Steel
Type B1 Web All Steel Cast
Type B2
Web With Lighten Holes All Steel Cast
Type B Plain With Hubs All Steel Cast
Type B3
Web With Spokes Cast
3
Spur Gears
4/12/00
3:56 PM
Page 4
Steel Stock Spur Gears
4 DP
31/2″ Face
20° Pressure Angle 31⁄ 2″
31⁄2″
P.D. O.D. P.D. O.D.
Type B
Type B2
Type B1
Plain With Hub All Steel
Web With Lighten Holes All Steel
Web All Steel
Type B
Type B1, B2
Steel Diameter
No. Teeth
Catalog Number
Pressure Angle (Deg.)
Pitch
Outside
Type
12 14 15 16 18 20 22 24 28 30 32 36 40 44 48 56 60 64 72 80
TS412 TS414 TS415 TS416 TS418 TS420 TS422 TS424 TS428 TS430 TS432 TS436 TS440 TS444 TS448 TS456 TS460 TS464 TS472 TS480
20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20
3.000 3.500 3.750 4.000 4.500 5.000 5.500 6.000 7.000 7.500 8.000 9.000 10.000 11.000 12.000 14.000 15.000 16.000 18.000 20.000
3.500 4.000 4.250 4.500 5.000 5.500 6.000 6.500 7.500 8.000 8.500 9.500 10.500 11.500 12.500 14.500 15.500 16.500 18.500 20.500
B B B B B B B B B B B B B B B B B B B B
* Recommended maximum bore with keyway and set screw.
4
1
2
2
2
2
Bore (Inches) Stock Max.*
1 ⁄8 11⁄8 11⁄8 11⁄8 11⁄8 11⁄8 11⁄8 11⁄8 11⁄8 11⁄8 11⁄4 11⁄4 11⁄4 11⁄4 11⁄4 11⁄4 11⁄4 11⁄4 11⁄4 11⁄4 1
1 ⁄16 13⁄4 17⁄8 21⁄8 23⁄8 23⁄4 3 31⁄8 31⁄8 31⁄8 31⁄8 31⁄8 31⁄8 31⁄8 31⁄8 31⁄4 31⁄4 31⁄4 31⁄4 31⁄4 5
Hub (Inches) Diameter Proj.
2 ⁄64 249⁄64 3 1⁄64 317⁄64 349⁄64 417⁄64 449⁄64 5 5 5 5 5 51⁄8 51⁄8 51⁄8 51⁄2 51⁄2 51⁄2 51⁄2 51⁄2 17
⁄8 ⁄8 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 1 1⁄4 1 1⁄4 1 1⁄4 1 1⁄2 1 1⁄2 11⁄2 1 1⁄2 1 1⁄2 11⁄2 11⁄2 11⁄2 11⁄2 1 1⁄2 7
7
7
Weight Lbs. (App.)
6.8 9.8 11.5 13.3 17.3 21.8 26.7 33.7 43.8 49.4 56.8 70.0 85.2 101.6 119.5 96.9 88.1 86.9 86.5 90.9
20° P.A. Gears Will Not Operate With 141⁄2° P.A.
Spur Gears
4/12/00
3:56 PM
Page 5
Steel Stock Spur Gears
5 DP
21/2″ Face
20° Pressure Angle 21⁄2 ″
21⁄2″
P.D. O.D. P.D. O.D.
Type B Type B2
Type B
Type B2
Plain With Hub All Steel Cast
Web With Lighten Holes All Steel
Steel Diameter
No. Teeth
Catalog Number
Pressure Angle (Deg.)
Pitch
Outside
Type
12 14 15 16 18 20 24 25 28 30 35 40 45 50 60 70 80 90 100 110 120
TS512 TS514 TS515 TS516 TS518 TS520 TS524 TS525 TS528 TS530 TS535 TS540 TS545 TS550 TS560 TS570 TS580 TS590 TS5100 TS5110 TS5120
20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20
2.400 2.800 3.000 3.200 3.600 4.000 4.800 5.000 5.600 6.000 7.000 8.000 9.000 10.000 12.000 14.000 16.000 18.000 20.000 22.000 24.000
2.800 3.200 3.400 3.600 4.000 4.400 5.200 5.400 6.000 6.400 7.400 8.400 9.400 10.400 12.400 14.400 16.400 18.400 20.400 22.400 24.400
B B B B B B B B B B B B B B B B B B B B B
* Recommended maximum bore with keyway and set screw.
2
2
2
2
2
2
Bore (Inches) Stock Max.*
1 ⁄8 11⁄8 11⁄8 11⁄8 11⁄8 11⁄8 11⁄8 11⁄8 11⁄8 11⁄8 11⁄4 11⁄4 11⁄4 11⁄4 11⁄4 13⁄16 1 3⁄16 1 3⁄16 1 5⁄16 15 ⁄16 15⁄16 1
1 ⁄8 15⁄16 17⁄16 15⁄8 17⁄8 21⁄4 23⁄8 23⁄8 23⁄8 23⁄8 23⁄8 23⁄8 23⁄8 213⁄16 213⁄16 31⁄8 31⁄8 31⁄8 31⁄4 31⁄4 31⁄2 1
Hub (Inches) Diameter Proj.
1 ⁄ 2 3⁄16 23⁄8 219⁄32 3 33⁄8 33⁄4 33⁄4 33⁄4 33⁄4 33⁄4 33⁄4 33⁄4 45⁄8 45⁄8 51⁄4 51⁄4 51⁄4 53⁄4 53⁄4 6 1⁄4 25 32
⁄8 ⁄8 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 1 1⁄4 11⁄4 11⁄4 1 1⁄4 11⁄4 11⁄4 1 1⁄4 11⁄4 1 1⁄4 1 1⁄4 1 1⁄4 1 1⁄4 11⁄2 11⁄2 11⁄2 7
7
7
Weight Lbs. (App.)
2.9 4.3 5.2 6.1 8.0 10.2 15.7 20.3 22.9 23.9 29.9 38.2 47.7 60.3 84.7 51.6 55.8 59.7 69.2 72.3 80.2
20° P.A. Gears Will Not Operate With 141⁄2° P.A.
5
Spur Gears
4/12/00
3:56 PM
Page 6
Steel Stock Spur Gears
6 DP 2″ Face
20° Pressure Angle 2″
2″
P.D. O.D. P.D. O.D.
Type B2
Type B
Web With Lighten Holes All Steel
Plain With Hub All Steel
Type B
Type B2
Steel Diameter
No. Teeth
Catalog Number
Pressure Angle (Deg.)
Pitch
Outside
Type
11 12 14 15 16 18 21 24 27 30 33 36 42 48 54 60 64 66 72 84 96 108 120
TS611† TS612 TS614 TS615 TS616 TS618 TS621 TS624 TS627 TS630 TS633 TS636 TS642 TS648 TS654 TS660 TS664 TS666 TS672 TS684 TS696 TS6108 TS6120
20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20
2.000 2.000 2.333 2.500 2.666 3.000 3.500 4.000 4.500 5.000 5.500 6.000 7.000 8.000 9.000 10.000 10.666 11.000 12.000 14.000 16.000 18.000 20.000
2.333 2.333 2.666 2.833 3.000 3.333 3.833 4.333 4.833 5.333 5.833 6.333 7.333 8.333 9.333 10.333 11.000 11.333 12.333 14.333 16.333 18.333 20.333
B B B B B B B B B B B B B B B B B B B B B B B
Bore (Inches) Stock Max.*
1 1 1 1 1 1 1 11⁄8 11⁄8 11⁄8 11⁄8 11⁄8 11⁄8 11⁄8 11⁄8 11⁄4 11⁄4 11⁄4 11⁄4 11⁄4 11⁄4 11⁄4 11⁄4
2
2
2
2
* Recommended maximum bore with keyway and set screw. † Enlarged pitch diameter with special tooth form.
Hub (Inches) Diameter Proj.
1 1 1 11⁄4 15⁄16 11⁄2 17⁄8 17⁄8 21⁄8 21⁄2 21⁄2 21⁄2 21⁄2 21⁄2 21⁄2 2 11⁄16 211⁄16 2 11⁄16 211⁄16 2 13⁄16 213⁄16 213⁄16 2 13⁄16
11⁄2 11⁄2 113⁄16 2 21⁄8 21⁄2 3 3 31⁄2 4 4 4 4 4 4 45⁄8 45⁄8 45⁄8 45⁄8 5 5 5 5
Weight Lbs. (App.)
⁄8 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 1 1⁄2 11⁄2 1 1⁄2 11⁄2 1 1⁄2 11⁄2 11⁄2 1 1⁄2 11⁄2 1 1⁄2 11⁄2 11⁄2 1 1⁄2
1.6 1.6 2.4 2.9 3.4 4.6 6.6 8.1 10.6 13.4 17.8 20.4 26.2 32.8 40.4 50.0 56.5 59.8 70.0 42.8 46.0 48.8 51.3
7
7
20° P.A. Gears Will Not Operate With 141⁄2° P.A.
Bored-to-Size
6
No. Teeth
Catalog Number
Pressure Angle (Deg.)
12 14 14 15 15 15 15 16 16 16 16 18 18 18 18 21 21 21 21
TS612BS 1 TS614BS 1 TS614BS 1-1/8 TS615BS 1 TS615BS 1-1/8 TS615BS 1-3/16 TS615BS 1-1/4 TS616BS 1 TS616BS 1-1/8 TS616BS 1-3/16 TS616BS 1-1/4 TS618BS 1 TS618BS 1-1/8 TS618BS 1-3/16 TS618BS 1-1/4 TS621BS 1 TS621BS 1-1/8 TS621BS 1-3/16 TS621BS 1-1/4
20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20
Diameter Pitch
2.000 2.333 2.333 2.500 2.500 2.500 2.500 2.667 2.667 2.667 2.667 3.000 3.000 3.000 3.000 3.500 3.500 3.500 3.500
Outside
2.333 2.667 2.667 2.833 2.833 2.833 2.833 3.000 3.000 3.000 3.000 3.333 3.333 3.333 3.333 3.833 3.833 3.833 3.833
Type
B B B B B B B B B B B B B B B B B B B
Bore (Inches) Stock Keyway
1 1 11⁄8 1 11⁄8 1 3⁄16 11⁄4 1 11⁄8 13⁄16 11⁄4 1 11⁄8 13⁄16 11⁄4 1 1 1⁄8 13⁄16 11⁄4
⁄4 X 1⁄8 ⁄4 X 1⁄8 1 ⁄4 X 1⁄8 1 ⁄4 X 1⁄8 1 ⁄4 X 1⁄8 1 ⁄4 X 1⁄8 1 ⁄4 X 1⁄8 1 ⁄4 X 1⁄8 1 ⁄4 X 1⁄8 1 ⁄4 X 1⁄8 1 ⁄4 X 1⁄8 1 ⁄4 X 1 ⁄8 1 ⁄4 X 1⁄8 1 ⁄4 X 1 ⁄8 1 ⁄4 X 1⁄8 1 ⁄4 X 1 ⁄8 1 ⁄4 X 1 ⁄8 1 ⁄4 X 1⁄8 1 ⁄4 X 1⁄8 1
1
Set
Screw
(1) 1/4-20 @90 (1) 5/16-18 @90 (1) 5/16-18 @90 (1) 5/16-18 @90 (1) 5/16-18 @90 (1) 5/16-18 @90 (1) 5/16-18 @90 (1) 5/16-18 @90 (1) 5/16-18 @90 (1) 5/16-18 @90 (1) 5/16-18 @90 (1) 5/16-18 @90 (1) 5/16-18 @90 (1) 5/16-18 @90 (1) 5/16-18 @90 (1) 5/16-18 @90 (1) 5/16-18 @90 (1) 5/16-18 @90 (1) 5/16-18 @90
Hub (Inches) Diameter Proj.
11 ⁄2 113⁄16 113⁄16 2 2 2 2 21⁄8 2 1⁄8 21⁄8 21⁄8 21 ⁄2 21⁄2 21⁄2 3 3 3 3 3
⁄8 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7
7
Weight Lbs. (App.)
1.60 2.40 2.40 2.90 2.90 2.90 2.90 3.40 3.40 3.40 3.40 4.60 4.60 4.60 4.60 6.60 6.60 6.60 6.60
Spur Gears
4/12/00
3:56 PM
Page 31
Steel & Cast Stock Spur Gears
8 DP
11/2″ Face
20° Pressure Angle 11⁄2″ 11⁄2 ″
P.D. P.D.
O.D.
O.D.
Type B Type B
Type B3
Plain With Hub All Steel
Type B2, B3
Web With Spokes Cast
Steel Diameter
No. Teeth
Catalog Number
Pressure Angle (Deg.)
Pitch
Outside
Type
12 14 15 16 18 19 20 22 24 26 28 30 32 36 40 42 44 48
TS812 TS814 TS815 TS816 TS818 TS819 TS820 TS822 TS824 TS826 TS828 TS830 TS832 TS836 TS840 TS842 TS844 TS848
20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20
1.500 1.750 1.875 2.000 2.250 2.375 2.500 2.750 3.000 3.250 3.500 3.750 4.000 4.500 5.000 5.250 5.500 6.000
1.750 2.000 2.125 2.250 2.500 2.625 2.750 3.000 3.250 3.500 3.750 4.000 4.250 4.750 5.250 5.500 5.750 6.250
B B B B B B B B B B B B B B B B B B
No. Teeth
Catalog Number
Pressure Angle (Deg.)
Pitch
Outside
Type
52 56 60 64 72 80 88 96 112 120 128 144 160
TC852 TC856 TC860 TC864 TC872 TC880 TC888 TC896 TC8112 TC8120 TC8128 TC8144 TC8160
20 20 20 20 20 20 20 20 20 20 20 20 20
6.500 7.000 7.500 8.000 9.000 10.000 11.000 12.000 14.000 15.000 16.000 18.000 20.000
6.750 7.250 7.750 8.250 9.250 10.250 11.250 12.250 14.250 15.250 16.250 18.250 20.250
B B B B B B B B B B B B B
Pitch
Bore (Inches) Stock Max.*
⁄4 ⁄4 ⁄4 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 1 1 1 1 1 1 1 3
3
3
Hub (Inches) Diameter Proj.
⁄4 ⁄ ⁄ ⁄ 11⁄8 11⁄4 15⁄16 11⁄2 15⁄8 13⁄4 13⁄4 13⁄4 17⁄8 21⁄8 21⁄8 21⁄8 21⁄8 21⁄8
1 ⁄8 15⁄16 17⁄16 19⁄16 113⁄16 2 2 1⁄16 2 5⁄16 29⁄16 23⁄4 23⁄4 23⁄4 31⁄4 31⁄2 31⁄2 31⁄2 31⁄2 31⁄2
3
1
13 16 7 8 15 16
Weight Lbs. (App.)
⁄4 ⁄4 ⁄4 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 1 1 1
0.7 1.0 1.2 1.4 1.9 2.3 2.5 3.2 3.9 4.6 5.2 5.6 6.6 8.6 10.2 11.4 12.3 14.2
3
3
3
Cast Diameter
Bore (Inches) Stock Max.*
1 1 1 1 1 11⁄8 11⁄8 11⁄8 11⁄8 11⁄8 11⁄8 11⁄8 11⁄4
2
3
3
3
3
3
3
3
3
3
3
Hub (Inches) Diameter Proj.
17⁄8 17⁄8 17⁄8 17⁄8 21⁄16 21⁄16 21⁄16 21⁄8 21⁄8 21⁄8 21⁄8 21⁄4 21⁄4
3 3 3 3 31⁄4 31⁄4 31⁄4 31⁄2 31⁄2 31⁄2 31⁄2 33⁄4 33⁄4
Weight Lbs. (App.)
1 1 1 1 1 1 1⁄4 11⁄4 11⁄4 11⁄4 11⁄4 11⁄4 11⁄4 11⁄2
11.9 13.0 12.0 12.1 14.4 17.0 19.0 23.7 25.0 25.8 28.0 32.0 34.8
Bored-to-Size No. Teeth
Catalog Number
Pressure Angle (Deg.)
12 14 15 15 16 16 18 18 18 20 20 20 22 22 22 24 24 24
TS812BS 3/4 TS814BS 3/4 TS815BS 3/4 TS815BS 7/8 TS816BS 7/8 TS816BS 1 TS818BS 7/8 TS818BS 1 TS818BS 1-1/8 TS820BS 7/8 TS820BS 1 TS820BS 1-1/8 TS822BS 7/8 TS822BS 1 TS822BS 1-1/8 TS824BS 7/8 TS824BS 1 TS824BS 1-1/8
20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20
Diameter
1.500 1.750 1.875 1.875 2.000 2.000 2.250 2.250 2.250 2.500 2.500 2.500 2.750 2.750 2.750 3.000 3.000 3.000
* Recommended maximum bore with keyway and set screw.
Outside
1.750 2.000 2.125 2.125 2.250 2.250 2.500 2.500 2.500 2.750 2.750 2.750 3.000 3.000 3.000 3.250 3.250 3.250
Type
B B B B B B B B B B B B B B B B B B
Bore (Inches) Stock Keyway
⁄4 ⁄4 3 ⁄4 7 ⁄8 7 ⁄8 1 7 ⁄8 1 1 1⁄8 7 ⁄8 1 1 1 ⁄8 7 ⁄8 1 1 1 ⁄8 7 ⁄8 1 1 1⁄8 3
3
⁄16 X 3 ⁄32 ⁄16 X 3⁄32 3 ⁄16 X 3⁄32 3 ⁄16 X 3⁄32 3 ⁄16 X 3 ⁄32 1 ⁄4 X 1⁄8 3 ⁄16 X 3⁄32 1 ⁄4 X 1⁄8 1 ⁄4 X 1 ⁄8 3 ⁄16 X 3⁄32 1 ⁄4 X 1⁄8 1 ⁄4 X 1⁄8 3 ⁄16 X 3⁄32 1 ⁄4 X 1⁄8 1 ⁄4 X 1⁄8 3 ⁄16 X 3⁄32 1 ⁄4 X 1 ⁄8 1 ⁄4 X 1⁄8 3
3
Set
Screw
(1) 10-24 @ 90 (1) 1/4-20 @ 90 (1) 1/4-20 @ 90 (1) 1/4-20 @ 90 (1) 1/4-20 @ 90 (1) 5/16-18 @ 90 (1) 1/4-20 @ 90 (1) 5/16-18 @ 90 (1) 5/16-18 @ 90 (1) 1/4-20 @ 90 (1) 5/16-18 @ 90 (1) 5/16-18 @ 90 (1) 1/4-20 @ 90 (1) 5/16-18 @ 90 (1) 5/16-18 @ 90 (1) 1/4-20 @ 90 (1) 5/16-18 @ 90 (1) 5/16-18 @ 90
Hub (Inches) Diameter Proj.
11⁄8 15⁄16 17⁄16 17⁄16 19⁄16 19⁄16 113 ⁄16 113 ⁄16 113⁄16 21⁄16 21⁄16 21⁄16 25⁄16 25⁄16 25⁄16 29⁄16 29⁄16 29⁄16
⁄4 ⁄4 3 ⁄4 3 ⁄4 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 3
3
20° P.A. Gears Will Not Operate With 141⁄2° P.A.
Weight Lbs. (App.)
0.70 1.00 1.20 1.20 1.40 1.40 1.90 1.90 1.90 2.50 2.50 2.50 3.20 3.20 3.20 3.90 3.90 3.90
7
Spur Gears
4/12/00
3:56 PM
Page 32
Steel & Cast Stock Spur Gears
10 DP
11/4″ Face
20° Pressure Angle 11⁄ 4″
11 ⁄4″
P.D. O.D. P.D. O.D.
Type B
Type B3
Plain With Hub All Steel
Web With Spokes Cast
Type B
Type B3
Steel Diameter
No. Teeth
Catalog Number
Pressure Angle (Deg.)
Pitch
Outside
Type
12 14 15 16 18 20 22 24 25 26 28 30 32 35 36 40 45 48 50 55 60
TS1012 TS1014 TS1015 TS1016 TS1018 TS1020 TS1022 TS1024 TS1025 TS1026 TS1028 TS1030 TS1032 TS1035 TS1036 TS1040 TS1045 TS1048 TS1050 TS1055 TS1060
20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20
1.200 1.400 1.500 1.600 1.800 2.000 2.200 2.400 2.500 2.600 2.800 3.000 3.200 3.500 3.600 4.000 4.500 4.800 5.000 5.500 6.000
1.400 1.600 1.700 1.800 2.000 2.200 2.400 2.600 2.700 2.800 3.000 3.200 3.400 3.700 3.800 4.200 4.700 5.000 5.200 5.700 6.200
B B B B B B B B B B B B B B B B B B B B B
No. Teeth
Catalog Number
Pressure Angle (Deg.)
Pitch
Outside
Type
70 80 90 100
TC1070 TC1080 TC1090 TC10100
20 20 20 20
7.000 8.000 9.000 10.000
7.200 8.200 9.200 10.200
B B B B
Bore (Inches) Stock Max.*
⁄8 ⁄4 3 ⁄4 3 ⁄4 3 ⁄4 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 1 1 1 1 1 1 1 1
Hub (Inches) Diameter Proj.
⁄8 ⁄4 3 ⁄4 3 ⁄4 13 ⁄16 7 ⁄8 1 1 ⁄16 3 1 ⁄16 11⁄4 11⁄4 15⁄16 13⁄8 13⁄8 13⁄8 13⁄8 21⁄8 21⁄8 23⁄8 21⁄2 21⁄2 21⁄2
5
29 ⁄32 17⁄64 1 7⁄32 15⁄16 111⁄32 139⁄64 113⁄16 21⁄64 27⁄64 21⁄8 213⁄32 21⁄2 21⁄2 21⁄2 21⁄2 31⁄2 31⁄2 33⁄4 4 4 4
5
3
3
Weight Lbs. (App.)
⁄8 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 1 1
0.4 0.6 0.6 0.7 0.9 1.2 1.5 1.8 2.0 2.2 2.7 3.4 3.7 4.2 4.3 6.4 7.5 8.7 9.6 11.5 13.1
5
5
Cast Diameter
Bore (Inches) Stock Max.*
1 1 1 11⁄8
3
3
3
3
* Recommended maximum bore with keyway and set screw.
Hub (Inches) Diameter Proj.
1 ⁄ 1 11⁄16 113⁄16 1 13⁄16
2 ⁄4 23⁄4 3 3
11 16
3
Weight Lbs. (App.)
1 1 1 1 1⁄8
8.2 11.2 11.7 12.2
20° P.A. Gears Will Not Operate With 141⁄2° P.A.
Bored-to-Size
8
No. Teeth
Catalog Number
Pressure Angle (Deg.)
12 14 15 16 18 20 20 24 24 25 25 28 28
TS1012BS 5/8 TS1014BS 5/8 TS1015BS 3/4 TS1016BS 3/4 TS1018BS 7/8 TS1020BS 7/8 TS1020BS 1 TS1024BS 7/8 TS1024BS 1 TS1025BS 7/8 TS1025BS 1 TS1028BS 7/8 TS1028BS 1
20 20 20 20 20 20 20 20 20 20 20 20 20
Diameter Pitch
1.200 1.400 1.500 1.600 1.800 2.000 2.000 2.400 2.400 2.500 2.500 2.800 2.800
Outside
1.400 1.600 1.700 1.800 2.000 2.200 2.200 2.600 2.600 2.700 2.700 3.000 3.000
Type
B B B B B B B B B B B B B
Bore (Inches) Stock Keyway
⁄8 ⁄8 3 ⁄4 3 ⁄4 7 ⁄8 7 ⁄8 1 7 ⁄8 1 7 ⁄8 1 7 ⁄8 1
5
5
⁄16 X 3⁄32 ⁄16 X 3⁄32 3 ⁄16 X 3 ⁄32 3 ⁄16 X 3⁄32 3 ⁄16 X 3 ⁄32 3 ⁄16 X 3⁄32 1 ⁄4 X 1⁄8 3 ⁄16 X 3⁄32 1 ⁄4 X 1⁄8 3 ⁄16 X 3⁄32 1 ⁄4 X 1⁄8 3 ⁄16 X 3⁄32 1 ⁄4 X 1⁄8 3
3
Set
Screw
(1) 10-24 @ 90 (1) 1/4-20 @ 90 (1) 1/4-20 @ 90 (1) 1/4-20 @ 90 (1) 1/4-20 @ 90 (1) 1/4-20 @ 90 (1) 5/16-18 @ 90 (1) 1/4-20 @ 90 (1) 5/16-18 @ 90 (1) 1/4-20 @ 90 (1) 5/16-18 @ 90 (1) 1/4-20 @ 90 (1) 5/16-18 @ 90
Hub (Inches) Diameter Proj. 29 ⁄32 17⁄64 7 1 ⁄32 15⁄16 111 ⁄32 139⁄64 139⁄64 113 ⁄16 113⁄16 27⁄64 27 ⁄64 213⁄32 213⁄32
⁄8 ⁄8 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5
5
5
Weight Lbs. (App.)
0.40 0.60 0.60 0.70 0.90 1.20 1.20 1.50 1.50 2.00 2.00 2.70 2.70
Spur Gears
4/12/00
3:56 PM
Page 33
Steel & Cast Stock Spur Gears
12 DP 1″ Face
20° Pressure Angle 1″
1″
P.D. O.D. P.D. O.D.
Type B Type B
Type B3
Type B3
Plain With Hub All Steel
Web With Spokes Cast
Steel Diameter
No. Teeth
Catalog Number
Pressure Angle (Deg.)
Pitch
Outside
Type
12 13 14 15 16 18 19 20 21 22 24 25 26 28 30 32 36 42 48 54 60 66 72
TS1212 TS1213 TS1214 TS1215 TS1216 TS1218 TS1219 TS1220 TS1221 TS1222 TS1224 TS1225 TS1226 TS1228 TS1230 TS1232 TS1236 TS1242 TS1248 TS1254 TS1260 TS1266 TS1272
20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20
1.000 1.083 1.167 1.250 1.333 1.500 1.583 1.667 1.750 1.833 2.000 2.083 2.167 2.333 2.500 2.667 3.000 3.500 4.000 4.500 5.000 5.500 6.000
1.167 1.250 1.333 1.417 1.500 1.667 1.750 1.833 1.917 2.000 2.166 2.250 2.333 2.500 2.667 2.833 3.167 3.666 4.166 4.666 5.166 5.666 6.166
B B B B B B B B B B B B B B B B B B B B B B B
No. Teeth
Catalog Number
Pressure Angle (Deg.)
Pitch
Outside
Type
84 96 108 120 144
TC1284 TC1296 TC12108 TC12120 TC12144
20 20 20 20 20
7.000 8.000 9.000 10.000 12.000
7.166 8.166 9.166 10.166 12.166
B B B B B
Pitch
Bore (Inches) Stock Max.*
⁄2 ⁄8 ⁄8 5 ⁄8 5 ⁄8 3 ⁄4 3 ⁄4 3 ⁄4 3 ⁄4 3 ⁄4 3 ⁄4 3 ⁄4 3 ⁄4 3 ⁄4 3 ⁄4 3 ⁄4 3 ⁄4 3 ⁄4 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 1
5
5
Hub (Inches) Diameter Proj.
⁄2 ⁄8 ⁄8 5 ⁄8 5 ⁄8 3 ⁄4 3 ⁄4 3 ⁄4 13 ⁄16 7 ⁄8 15 ⁄16 1 1 ⁄16 11⁄8 11⁄4 15⁄16 15⁄16 13⁄8 13⁄8 17⁄8 21⁄8 21⁄8 21⁄8 21⁄8
⁄4 ⁄ ⁄32 63 ⁄64 11⁄16 11⁄4 15⁄16 15⁄16 125⁄64 19⁄16 141⁄64 113⁄16 17⁄8 21⁄16 25⁄32 21⁄4 21⁄2 21⁄2 3 31⁄2 31⁄2 31⁄2 31⁄2
1
5
0.21 0.21 0.28 0.34 0.41 0.51 0.59 0.65 0.75 0.88 1.06 1.22 1.33 1.60 1.83 2.08 2.98 3.71 4.99 6.57 7.63 8.80 10.08
5
13 16
5
Weight Lbs. (App.)
⁄8 ⁄8 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8 7 ⁄8
3
5
29
5
Cast Diameter
Bore (Inches) Stock Max.*
⁄8 ⁄8 ⁄8 1 1 7
3
7
3
7
3
3
3
Hub (Inches) Diameter Proj.
1 ⁄16 17⁄16 17⁄16 17⁄16 111⁄16
2 ⁄2 21⁄2 21⁄2 21⁄2 23⁄4
7
Weight Lbs. (App.)
⁄8 ⁄8 ⁄8 7 ⁄8 1
1
5.9 7.0 7.6 10.3 10.4
7
7
7
Bored-to-Size No. Teeth
Catalog Number
Pressure Angle (Deg.)
12 13 14 15 16 18 20 21 21 24 24 24 28 28 28
TS1212BS 1/2 TS1213BS 5/8 TS1214BS 5/8 TS1215BS 5/8 TS1216BS 5/8 TS1218BS 3/4 TS1220BS 3/4 TS1221BS 3/4 TS1221BS 7/8 TS1224BS 3/4 TS1228BS 7/8 TS1228BS 1 TS1228BS 3/4 TS1228BS 7/8 TS1228BS 1
20 20 20 20 20 20 20 20 20 20 20 20 20 20 20
Diameter
1.000 1.083 1.167 1.250 1.333 1.500 1.667 1.750 1.750 2.000 2.000 2.000 2.333 2.333 2.333
* Recommended maximum bore with keyway and set screw.
Outside
1.167 1.250 1.333 1.417 1.500 1.667 1.833 1.917 1.917 2.167 2.167 2.167 2.500 2.500 2.500
Type
B B B B B B B B B B B B B B B
Bore (Inches) Stock Keyway
⁄2 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 3 ⁄4 3 ⁄4 3 ⁄4 7 ⁄8 3 ⁄4 7 ⁄8 1 3 ⁄4 7 ⁄8 1 1
5
NONE 3 ⁄16 X 3⁄32 3 ⁄16 X 3⁄32 3 ⁄16 X 3⁄32 3 ⁄16 X 3⁄32 3 ⁄16 X 3 ⁄32 3 ⁄16 X 3⁄32 3 ⁄16 X 3⁄32 3 ⁄16 X 3 ⁄32 3 ⁄16 X 3⁄32 3 ⁄16 X 3⁄32 1 ⁄4 X 1⁄8 3 ⁄16 X 3⁄32 3 ⁄16 X 3⁄32 1 ⁄4 X 1 ⁄8
Set
Screw
(1)10-24 (1) 10-24 @ 90 (1) 10-24 @ 90 (1) 10-24 @ 90 (1)1/4-20 @ 90 (1)1/4-20 @ 90 (1)1/4-20 @ 90 (1)1/4-20 @ 90 (1)1/4-20 @ 90 (1)1/4-20 @ 90 (1)1/4-20 @ 90 (1) 5/16-18 @ 90 (1)1/4-20 @ 90 (1)1/4-20 @ 90 (1) 5/16-18 @ 90
Hub (Inches) Diameter Proj.
⁄4 ⁄16 29 ⁄32 63 ⁄64 11⁄16 11⁄4 15⁄16 125⁄64 125⁄64 141⁄64 141⁄64 141⁄64 21 ⁄16 21 ⁄16 21 ⁄16 3
15
⁄8 ⁄8 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5
5
5
20° P.A. Gears Will Not Operate With 141⁄2° P.A.
Weight Lbs. (App.)
0.21 0.21 0.28 0.34 0.41 0.51 0.65 0.75 0.75 1.06 1.06 1.06 1.60 1.60 1.60
9
Spur Gears
4/12/00
3:57 PM
Page 34
Steel & Cast Stock Spur Gears
16 DP
/4″ Face
3
20° Pressure Angle 3
⁄4″
3
⁄4″
P.D.
P.D. O.D.
O.D.
Type B
Type B3
Plain With Hub All Steel
Web With Spokes Cast
Type B
Type B3
Steel Diameter
No. Teeth
Catalog Number
Pressure Angle (Deg.)
Pitch
Outside
Type
12 13 14 15 16 17 18 20 21 22 24 26 28 30 32 36 40 48 56 60 64 72 80 84 96 104
TS1612 TS1613 TS1614 TS1615 TS1616 TS1617 TS1618 TS1620 TS1621 TS1622 TS1624 TS1626 TS1628 TS1630 TS1632 TS1636 TS1640 TS1648 TS1656 TS1660 TS1664 TS1672 TS1680 TS1684 TS1696 TS16104
20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20
.750 .812 .875 .937 1.000 1.062 1.125 1.250 1.312 1.375 1.500 1.625 1.750 1.875 2.000 2.250 2.500 3.000 3.500 3.750 4.000 4.500 5.000 5.250 6.000 6.500
.875 .938 1.000 1.063 1.125 1.188 1.250 1.375 1.438 1.500 1.625 1.750 1.875 2.000 2.125 2.375 2.625 3.125 3.625 3.875 4.125 4.625 5.125 5.375 6.125 6.625
B B B B B B B B B B B B B B B B B B B B B B B B B B
No. Teeth
Catalog Number
Pressure Angle (Deg.)
Pitch
Outside
Type
112 128 144 160 192
TC16112 TC16128 TC16144 TC16160 TC16192
20 20 20 20 20
7.000 8.000 9.000 10.000 12.000
7.125 8.125 9.125 10.125 12.125
B B B B B
Bore (Inches) Stock Max.*
⁄8 ⁄8 ⁄8 3 ⁄8 1 ⁄2 1 ⁄2 1 ⁄2 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 3 ⁄4 3 ⁄4 3 ⁄4 3 ⁄4 3 ⁄4 3 ⁄4
Hub (Inches) Diameter Proj.
⁄8 ⁄8 ⁄8 1 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2 5 ⁄8 5 ⁄8 5 ⁄8 3 ⁄4 7 ⁄8 7 ⁄8 15 ⁄16 1 11⁄4 11⁄4 11⁄4 13⁄8 11⁄2 11⁄2 17⁄8 21⁄8 21⁄8 21⁄8 21⁄8
3
⁄ ⁄ ⁄ ⁄ 13 ⁄16 7 ⁄8 15 ⁄16 11⁄16 11⁄8 13⁄16 1 5⁄16 17⁄16 11⁄2 15⁄8 13⁄4 2 2 2 21⁄2 23⁄4 23⁄4 3 31⁄2 31⁄2 31⁄2 31⁄2
3
3
⁄2 ⁄2 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 3 ⁄4 3 ⁄4 3 ⁄4 3 ⁄4 3 ⁄4 3 ⁄4
9 16 5 8 11 16 3 4
3
3
3
Weight Lbs. (App.)
0.09 0.11 0.14 0.17 0.17 0.20 0.24 0.28 0.32 0.36 0.46 0.56 0.65 0.77 0.90 1.18 1.48 1.94 2.79 3.28 3.74 4.69 6.03 6.46 7.86 8.91
1
1
1
Cast Diameter
Bore (Inches) Stock Max.*
⁄4 ⁄4 3 ⁄4 7 ⁄8 7 ⁄8
17⁄16 1 11⁄16 1 11⁄16 111⁄16 1 13⁄16
3
3
3
3
3
3
3
* Recommended maximum bore with keyway and set screw.
Hub (Inches) Diameter Proj.
21⁄2 23⁄4 23⁄4 23⁄4 3
Weight Lbs. (App.)
⁄4 ⁄4 3 ⁄4 3 ⁄4 1
4.4 5.5 6.4 8.1 10.1
3
3
20° P.A. Gears Will Not Operate With 141⁄2° P.A.
Bored-to-Size
10
Diameter
Bore (Inches) Stock Keyway
Hub (Inches) Diameter Proj.
No. Teeth
Catalog Number
Pressure Angle (Deg.)
12 14 15 15 16 18 20 24 24 28 28 30 30 30
TS1612BS 3/8 TS1614BS 3/8 TS1615BS 3/8 TS1615BS 1/2 TS1616BS 1/2 TS1618BS 1/2 TS1620BS 5/8 TS1624BS 5/8 TS1624BS 3/4 TS1628BS 5/8 TS1628BS 3/4 TS1630BS 5/8 TS1630BS 3/4 TS1630BS 7/8
20 20 20 20 20 20 20 20 20 20 20 20 20 20
0.750 0.875 0.937 0.937 1.000 1.125 1.250 1.500 1.500 1.750 1.750 1.875 1.875 1.875
0.875 1.000 1.063 1.063 1.125 1.250 1.375 1.625 1.625 1.875 1.875 2.000 2.000 2.000
B B B B B B B B B B B B B B
⁄8 ⁄8 3 ⁄8 1 ⁄2 1 ⁄2 1 ⁄2 5 ⁄8 5 ⁄8 3 ⁄4 5 ⁄8 3 ⁄4 5 ⁄8 3 ⁄4 7 ⁄8
NONE NONE NONE NONE NONE NONE 3 ⁄16 X 3 ⁄32 3 ⁄16 X 3⁄32 3 ⁄16 X 3⁄32 3 ⁄16 X 3⁄32 3 ⁄16 X 3⁄32 3 ⁄16 X 3⁄32 3 ⁄16 X 3⁄32 3 ⁄16 X 3 ⁄32
(1) 8-32 (1) 10-24 (1) 10-24 (1) 10-24 (1) 10-24 (1) 1/4-20 (1) 1/4-20 @ 90 (1) 1/4-20 @ 90 (1) 1/4-20 @ 90 (1) 1/4-20 @ 90 (1) 1/4-20 @ 90 (1) 1/4-20 @ 90 (1) 1/4-20 @ 90 (1) 1/4-20 @ 90
9 16 11 16 3 4 3 4
⁄ ⁄ ⁄ ⁄ 13 ⁄16 15 ⁄16 1 1 ⁄16 15⁄16 15⁄16 1 1⁄2 1 1⁄2 1 5⁄8 15⁄8 15⁄8
⁄2 ⁄2 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2
0.09 0.14 0.17 0.17 0.17 0.24 0.28 0.46 0.46 0.65 0.65 0.77 0.77 0.77
32 32 32 32
TS1632BS 5/8 TS1632BS 3/4 TS1632BS 7/8 TS1632BS 1
20 20 20 20
2.000 2.000 2.000 2.000
2.125 2.125 2.125 2.125
B B B B
⁄8 ⁄4 7 ⁄8 1
⁄16 X 3 ⁄32 ⁄16 X 3⁄32 3 ⁄16 X 3⁄32 1 ⁄4 X 1⁄8
(1) 1/4-20 @ 90 (1) 1/4-20 @ 90 (1) 1/4-20 @ 90 (1) 5/16-18 @ 90
13 ⁄4 13 ⁄4 13 ⁄4 13 ⁄4
⁄2 ⁄2 1 ⁄2 1 ⁄2
0.90 0.90 0.90 0.90
Pitch
Outside
Type
3
3
5
3
3
3
Set
Screw
1
1
1
1
1
Weight Lbs. (App.)
Spur Gears
4/12/00
3:57 PM
Page 35
Steel Stock Spur Gears
20 DP
/2″ Face
1
20° Pressure Angle
⁄2″
1
P.D. O.D.
Type B Plain With Hub All Steel
Type B
Steel Diameter
No. Teeth
Catalog Number
Pressure Angle (Deg.)
Pitch
Outside
Type
12 14 15 16 18 20 21 22 24 25 28 30 32 35 36 40 45 50 60 70 72 80 84 90 96 100 120
TS2012 TS2014 TS2015 TS2016 TS2018 TS2020 TS2021 TS2022 TS2024 TS2025 TS2028 TS2030 TS2032 TS2035 TS2036 TS2040 TS2045 TS2050 TS2060 TS2070 TS2072 TS2080 TS2084 TS2090 TS2096 TS20100 TS20120
20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20
.600 .700 .750 .800 .900 1.000 1.050 1.100 1.200 1.250 1.400 1.500 1.600 1.750 1.800 2.000 2.250 2.500 3.000 3.500 3.600 4.000 4.200 4.500 4.800 5.000 6.000
.700 .800 .850 .900 1.000 1.100 1.150 1.200 1.300 1.350 1.500 1.600 1.700 1.850 1.900 2.100 2.350 2.600 3.100 3.600 3.700 4.100 4.300 4.600 4.900 5.100 6.100
B B B B B B B B B B B B B B B B B B B B B B B B B B B
Bore (Inches) Stock Max.*
⁄16 ⁄16 ⁄8 3 ⁄8 3 ⁄8 1 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8
⁄16 ⁄16 ⁄8 3 ⁄8 3 ⁄8 1 ⁄2 1 ⁄2 1 ⁄2 9 ⁄16 5 ⁄8 11 ⁄16 13 ⁄16 7 ⁄8 7 ⁄8 15 ⁄16 11⁄16 11⁄4 11⁄4 15⁄16 17⁄16 17⁄16 11⁄2 11⁄2 11⁄2 11⁄2 11⁄2 11⁄2
5
⁄32 ⁄64 ⁄64 21 ⁄32 3 ⁄4 55 ⁄64 7 ⁄8 31 ⁄32 11⁄16 17⁄64 117⁄64 123⁄64 17⁄16 19⁄16 15⁄8 113⁄16 2 2 21⁄8 23⁄8 23⁄8 21⁄2 21⁄2 21⁄2 21⁄2 21⁄2 21⁄2
5
5
15
5
3
* Recommended maximum bore with keyway and set screw.
Hub (Inches) Diameter Proj. 35
3
39
Weight Lbs. (App.)
⁄16 ⁄16 ⁄16 7 ⁄16 7 ⁄16 7 ⁄16 7 ⁄16 7 ⁄16 7 ⁄16 7 ⁄16 7 ⁄16 7 ⁄16 1 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8 5 ⁄8
0.04 0.06 0.07 0.08 0.12 0.13 0.15 0.17 0.22 0.24 0.32 0.38 0.46 0.56 0.60 0.76 0.95 1.08 1.45 1.93 2.01 2.35 2.53 2.82 3.14 3.35 4.58
7
7
7
20° P.A. Gears Will Not Operate With 141⁄2° P.A.
Bored-to-Size No. Teeth
Catalog Number
Pressure Angle (Deg.)
12 14 15 16 18 20 24 25 30 35 40 40 40
TS2012BS 5/16 TS2014BS 5/16 TS2015BS 3/8 TS2016BS 1/2 TS2018BS 3/8 TS2020BS 1/2 TS2024BS 1/2 TS2025BS 1/2 TS2030BS 1/2 TS2035BS 1/2 TS2040BS 1/2 TS2040BS 5/8 TS2040BS 3/4
20 20 20 20 20 20 20 20 20 20 20 20 20
Diameter Pitch
0.600 0.700 0.750 0.800 0.900 1.000 1.200 1.250 1.500 1.750 2.000 2.000 2.000
Outside
0.700 0.800 0.850 0.900 1.000 1.100 1.300 1.350 1.600 1.850 2.100 2.100 2.100
Type
B B B B B B B B B B B B B
Bore (Inches) Stock Keyway
⁄16 ⁄16 3 ⁄8 3 ⁄8 3 ⁄8 1 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2 5 ⁄8 3 ⁄4
5
5
NONE NONE NONE NONE NONE NONE NONE NONE NONE NONE NONE 3 ⁄16 X 3 ⁄32 3 ⁄16 X 3 ⁄32
Set
Screw
#35 P.H. #35 P.H. (1) 8-32 (1) 8-32 (1) 10-24 (1) 10-24 (1) 1/4-20 (1) 1/4-20 (1) 1/4-20 (1) 1/4-20 (1) 1/4-20 (1) 1/4-20 @ 90 (1) 1/4-20 @ 90
Hub (Inches) Diameter Proj.
⁄32 ⁄64 39 ⁄64 21 ⁄32 3 ⁄4 55 ⁄64 11⁄16 7 1 ⁄64 123 ⁄64 19 ⁄16 113⁄16 113 ⁄16 113 ⁄16 15
35
⁄16 ⁄16 7 ⁄16 7 ⁄16 7 ⁄16 7 ⁄16 7 ⁄16 7 ⁄16 7 ⁄16 1 ⁄2 1 ⁄2 1 ⁄2 1 ⁄2 7
7
Weight Lbs. (App.)
0.04 0.06 0.07 0.08 0.12 0.13 0.22 0.24 0.38 0.56 0.76 0.76 0.76
11
Spur Gears
4/12/00
3:57 PM
Page 36
Gear Selection Stock Spur Gear Drive Selection When designing a stock gear drive using the horsepower tables in Catalog 2001, the following steps must be taken:
I.
Find out these five necessary things: a. Exact center distance in inches b. Ratio and speeds c. Service factor (from page G-84) d. Actual horsepower e. Bore sizes of both gears
II.
Determine Design Horsepower using formula: DHP = HP x SF
Where: DHP = Design Horsepower HP = Actual Horsepower SF = Service Factor (from page G-84)
III.
Determine Pitch Diameters using the formulas: PD1 = CD x 2 Ratio + 1 PD2 = PD1 x Ratio
Where: PD1 = Pitch Diameter of Pinion (small gear) PD2 = Pitch Diameter of Gear (large gear) CD = Center Distance
IV.
Check the Center Distance: CD = PD1 + PD2 2
12
V.
Select Pitch from Horsepower tables on pages G-25 — G-27.
VI.
Check Selected pitch for necessary Pitch Diameters.
VII.
Check Horsepower capacity of Large Gear.
VIII.
Check maximum bore capacity of selected Gears.
Spur Gears
4/12/00
3:57 PM
Page 81
Gear Selection Spur Gear Drive Selection II (Other Than Stock) When designing a gear drive when horsepower and speeds exceed the stock gear tables on pages G-25 — G-27, the following steps must be taken: I. We must obtain all of the following data: a. Exact center distance in inches b. Ratio and speeds c. Service factor (from page G-84) d. Actual horsepower e. Bore sizes of both gears
V. Determine approximate pitch using the formula: DP = 3.1416 x S x 3 x V x .25 DHP x 27.5 (1200 + V) Where: DP = Diametral Pitch S = Safe Static Stress per Square Inch of material (see table one, page G-84)
II. Determine Design Horsepower using formula: V = Velocity in FPM DHP = HP x SF DHP = Design Horsepower Where: DHP = Design Horsepower Note: HP = Actual Horsepower
To round off answers, go to the nearest DP (standard DP’s larger than 3 DP are: 1 DP, 11⁄4 DP, 11⁄2 DP, 13⁄4 DP, 2 DP, 21⁄2 DP)
SF = Service Factor (from page G-84)
III. Determine Pitch Diameters using the formulas: PD1 = CD x 2 Ratio + 1
VI. Determine number of teeth on both gears: N = PD x DP Where: N = Number of teeth
PD2 = PD1 x Ratio Where: PD1 = Pitch Diameter of Pinion (small gear)
PD = Pitch Diameter of gear DP = Diametral Pitch of gear
PD2 = Pitch Diameter of Gear (large gear) CD = Center Distance
IV. Determine velocity using the formula: V = .262 x PD x RPM Where: V = Velocity in feet per minute @ pitch line PD = Pitch Diameter RPM = Revolutions per minute of either gear*
NOTE: Velocities of both gears will always be the same. When using the above formula make sure to use the proper speed (RPM)with the proper pitch diameter.
13
Spur Gears
4/12/00
3:57 PM
Page 82
Gear Selection Spur Gear Drive Selection II (Other Than Stock) VII. Determine Face Width:
(
VIII. Check HP rating of selected pinion using the formula:
) )
F = DP DHP x 33,000 V 600 SY 600 + V
(
HP =
LV 33,000
Where: L = SYF x 600 DP 600 + V
Where: F = Face Width From horsepower formulas on page G-83. DP = Diametral Pitch Note: V = Velocity in FPM S = Safe Static Stress per Square Inch of material (Table 1, page G-84)
If the horsepower capacity is below the design horsepower, the following options can be taken: A. Harden pinion (check gear HP capacity first) B. Increase face C. Increase pitch
Y = Outline formula from Table 2, page G-84 Note:
To round off each answer, go to the next one inch.
Center Distance, Pitch Diameters and Ratios of Spur Gears To determine the pitch diameters of a gear set, we must find two basic things: 1. Required ratio
Then, find the pitch diameter of the larger gear, PD2, by using the formula:
2. Required center distance PD2 = PD1 x Ratio Knowing this, first figure out the pitch diameter of the pinion (smaller gear) using the formula: PD1 = CD x 2 Ratio + 1 Where: PD1 = Pitch Diameter of the Pinion CD = Center Distance
14
Then check the center distance by using the formula: CD = PD1 x PD2 2
Spur Gears
4/12/00
3:57 PM
Page 83
Gear Standards Horsepower Formulas See page G-84 for tables one, two and three Engineering Data Lewis Formula (with Barth Revision) L = Load in pounds at pitch line
V = Velocity in feet per minute V = .262 x PD x RPM
S = Safe static stress per square inch of material (see table one)
PD = Pitch Diameter
DP = Diametral Pitch
RPM = Revolutions Per Minute
F = Face width of gear
HP = Horsepower
Y = Strength factor based on Pressure Angle and Number of Teeth (See table two)
Maximum allowable torque (T) that should be imposed on a gear will be the safe tooth load (L) multiplied by DP or T = L x PD 2 2 The safe Horsepower capacity of the gear (at a given RPM) T x RPM can be calculated from HP = 63,025 or directly from (L) and (V): L = SFY x 600 DP 600 + V
*HP =
LV 33,000
For a known HP, T =
63025 x HP RPM
For NON-METALLIC GEARS, the modified Lewis Formula shown below may be used with (S) values of 6000 PSI for Phenolic Laminated material. L=
SFY DP
(
)
150 + .25 200 + V
* Apply SERVICEFACTOR (table three) for required horsepower.
15
Spur Gears
4/12/00
3:57 PM
Page 84
Gear Standards Table One (S) Average values in pounds per square inch Material
S
Steel — .40 Carbon — .20 Carbon Steel — .40 Carbon Heat Treated Cast Iron Bronze Non-Metallic
25000 20000 35000 12000 10000 6000
Table Two Outline factor Y for use with Diametral Pitch Number of Teeth
141⁄2 P.A. Involute
20 P.A. Involute
Number of Teeth
141⁄2 P.A. Involute
20 P.A. Involute
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
.176 .192 .210 .223 .235 .245 .255 .264 .270 .277 .283 .289 .292 .296 .302 .305
.201 .226 .245 .264 .276 .289 .295 .302 .308 .314 .320 .326 .330 .333 .337 .340
26 28 30 35 40 45 50 60 70 80 90 100 150 200 RACK
.308 .314 .318 .327 .336 .340 .346 .355 .360 .363 .366 .368 .375 .378 .390
.344 .352 .358 .373 .389 .399 .408 .421 .429 .436 .442 .446 .458 .463 .484
Table Three Service factors Multiply required horsepower by service factor recommended for type of service
16
Type of Load
Intermittent or 3 Hours per Day
8-10 Hours per Day
Continuous 24 Hours per Day
UNIFORM LIGHT SHOCK MEDIUM SHOCK HEAVY SHOCK
.80 1.00 1.25 1.50
1.00 1.25 1.50 1.80
1.25 1.50 1.80 2.00
Spur Gears
4/12/00
3:57 PM
Page 85
Spur Gear Dimensional Formulas Diametral Pitch Rules and Formulas For Spur Gear Calculations Diametral Pitch Diametral Pitch is the Number of Teeth to Each Inch of the Pitch Diameter. To Find
Having
Rule
The Diametrical Pitch
The Circular Pitch
Divide 3.1416 by the Circular Pitch
The Diametrical Pitch
The Pitch Diameter and the Number of Teeth
Divide the Number of Teeth by Pitch Diameter
The Diametrical Pitch
The Outside Diameter and Number of Teeth
Divide the Number of Teeth plus 2 by Outside Diameter
Pitch Diameter
The Number of Teeth and the Diametral Pitch
Divide Number of Teeth by the Diametral Pitch
Pitch Diameter
The Number of Teeth and Outside Diameter
Pitch Diameter
The Outside Diameter and the Diametral Pitch
Pitch Diameter
Addendum and the Number of Teeth
Divide the product of Outside Diameter and Number of Teeth by Number of Teeth plus 2 Subtract from the Outside Diameter the Quotient of 2 Divided by the Diametral Pitch Multiply Addendum by the Number of Teeth
Outside Diameter
The Number of Teeth and the Diametral Pitch
Divide number of Teeth plus 2 by the Diametral Pitch
Outside Diameter
The Pitch Diameter and the Diametral Pitch
Outside Diameter
The Pitch Diameter and the Number of Teeth
Outside Diameter
The Number of Teeth and Addendum
Add to the Pitch Diameter the quotient of 2 divided by the Diametral Pitch Divide the Number of Teeth plus 2 by the quotient of Number of Teeth divided by Pitch Diameter Multiply the Number of Teeth plus 2 by Addendum
Number of Teeth
The Pitch Diameter and the Diametral Pitch
Multiply the Pitch Diameter by the Diametral Pitch
Number of Teeth
The Outside Diameter and the Diametral Pitch
Thickness of Tooth
The Diametral Pitch
Multiply Outside Diameter by the Diametral Pitch and subtract 2 Divide 1.5708 by the Diametral Pitch
Addendum
The Diametral Pitch
Dedendum
The Diametral Pitch
Divide 1 by the Diametral Pitch or A = D′ N Divide 1.157 by the Diametral Pitch
Working Depth
The Diametral Pitch
Divide 2 by the Diametral Pitch
Whole Depth
The Diametral Pitch
Divide 2.157 by the Diametral Pitch
Clearance
The Diametral Pitch
Divide .157 by the Diametral Pitch
Clearance
Thickness of Tooth
Divide Thickness of Tooth at Pitch Line by 10
Formula
DP = 3.1416 CP DP = N D′ DP = N+2 D N D′ = P D′ = DN N+2 D′ = D 2 P D′ = sN D = N+2 P D = D′ + 2 P N+2 D= N÷D′ D = (N+2)s N = D′P N = DP- 2 t = 1.5708 P A=1 P 1.157 A+L = P WD = 2 P 2.157 D″ = P L = .157 P L= t 10
NOTE: Rules and Formulas Relating to Tooth Depth and Outside Diameter Apply to Full-Depth, Equal Addendum Gears.
17
Spur Gears
4/12/00
3:57 PM
Page 86
Diametral Pitch Tooth Dimensions Dimensions of Standard Full-depth Teeth Diametral Pitches and Equivalent Circular Pitches Diametral Pitch
Circular Pitch
Module
Arc Thickness of Tooth on Pitch Line
Addendum
Working Depth of Tooth
Dedendum or Depth of Space Below Pitch Line
Whole Depth of Tooth*
⁄2 ⁄4 1 1-1⁄4 1-1⁄2 1-3⁄4 2 2-1⁄4 2-1⁄2 2-3⁄4 3 3-1⁄2 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 22 24 26 28 30 32 34 36 38 40
6.2832 4.1888 3.1416 2.5133 2.0944 1.7952 1.5708 1.3963 1.2566 1.1424 1.0472 0.8976 0.7854 0.6283 0.5236 0.4488 0.3927 0.3491 0.3142 0.2856 0.2618 0.2417 0.2244 0.2094 0.1963 0.1848 0.1745 0.1653 0.1571 0.1428 0.1309 0.1208 0.1122 0.1047 0.0982 0.0924 0.0873 0.0827 0.0785
50.8 33.8667 25.4 20.32 16.9333 14.5143 12.7 11.2889 10.16 9.2364 8.4667 7.2571 6.35 5.08 4.2333 3.6286 3.175 2.8222 2.54 2.3091 2.1167 1.9538 1.8143 1.6933 1.5875 1.4941 1.4111 1.3368 1.27 1.1545 1.0583 .9769 .9071 .8467 .7938 .7471 .7056 .6684 .635
3.1416 2.0944 1.5708 1.2566 1.0472 0.8976 0.7854 0.6981 0.6283 0.5712 0.5236 0.4488 0.3927 0.3142 0.2618 0.2244 0.1963 0.1745 0.1571 0.1428 0.1309 0.1208 0.1122 0.1047 0.0982 0.0924 0.0873 0.0827 0.0785 0.0714 0.0654 0.0604 0.0561 0.0524 0.0491 0.0462 0.0436 0.0413 0.0393
2.0000 1.3333 1.0000 0.8000 0.6666 0.5714 0.5000 0.4444 0.4000 0.3636 0.3333 0.2857 0.2500 0.2000 0.1666 0.1429 0.1250 0.1111 0.1000 0.0909 0.0833 0.0769 0.0714 0.0666 0.0625 0.0588 0.0555 0.0526 0.0500 0.0455 0.0417 0.0385 0.0357 0.0333 0.0312 0.0294 0.0278 0.0263 0.0250
4.0000 2.6666 2.0000 1.6000 1.3333 1.1429 1.0000 0.8888 0.8000 0.7273 0.6666 0.5714 0.5000 0.4000 0.3333 0.2857 0.2500 0.2222 0.2000 0.1818 0.1666 0.1538 0.1429 0.1333 0.1250 0.1176 0.1111 0.1053 0.1000 0.0909 0.0833 0.0769 0.0714 0.0666 0.0625 0.0588 0.0555 0.0526 0.0500
2.3142 1.5428 1.1571 0.9257 0.7714 0.6612 0.5785 0.5143 0.4628 0.4208 0.3857 0.3306 0.2893 0.2314 0.1928 0.1653 0.1446 0.1286 0.1157 0.1052 0.0964 0.0890 0.0826 0.0771 0.0723 0.0681 0.0643 0.0609 0.0579 0.0526 0.0482 0.0445 0.0413 0.0386 0.0362 0.0340 0.0321 0.0304 0.0289
4.3142 2.8761 2.1571 1.7257 1.4381 1.2326 1.0785 0.9587 0.8628 0.7844 0.7190 0.6163 0.5393 0.4314 0.3595 0.3081 0.2696 0.2397 0.2157 0.1961 0.1798 0.1659 0.1541 0.1438 0.1348 0.1269 0.1198 0.1135 0.1079 0.0980 0.0898 0.0829 0.0770 0.0719 0.0674 0.0634 0.0599 0.0568 0.0539
1
3
*NOTE: Dimensions listed are for HOBCUT TEETHONLY. Shaper cut teeth may be slightly larger. Consult factory for exact measurement.
All Gears In Stock Are Diametral Pitch
18
Spur Gears
4/12/00
3:57 PM
Page 87
Spur Gear Dimensional Formulas Circular Pitch Rules and Formulas For Spur Gear Calculations Circular Pitch Circular Pitch is the Distance from the Center of One Tooth to the Center of the Next Tooth, Measured Along the Pitch Circle. To Find
Having
Rule
Formula
The Circular Pitch
The Diametral Pitch
Divide 3.1416 by the Diametral Pitch
The Circular Pitch
The Pitch Diameter and the Number of Teeth
The Circular Pitch
The Outside Diameter and the Number of Teeth
Pitch Diameter
The Number of Teeth and the Circular Pitch
Pitch Diameter
The Number of Teeth and the Outside Diameter
Pitch Diameter
The Outside Diameter and the Circular Pitch
Pitch Diameter
Addendum and the Number of Teeth
Divide Pitch Diameter by the product of .3183 and Number of Teeth Divide Outside Diameter by the product of .3183 and Number of Teeth plus 2 The continued product of the Number of Teeth, the Circular Pitch and .3183 Divide the product of Number of Teeth and Outside Diameter by Number of Teeth plus 2 Subtract from the Outside Diameter the product of the Circular Pitch and .6366 Multiply the Number of Teeth by the Addendum
Outside Diameter
The Number of Teeth and the Circular Pitch
Outside Diameter
The Pitch Diameter and the Circular Pitch
Outside Diameter
The Number of Teeth and the Addendum
Number of Teeth
The Pitch Diameter and the Circular Pitch
Thickness of Tooth
The Circular Pitch
Addendum
The Circular Pitch
Dedendum
The Circular Pitch
Multiply the Circular Pitch by .3183 or s = D′ N Multiply the Circular Pitch by .3683
Working Depth
The Circular Pitch
Multiply the Circular Pitch by .6366
WD = C′ .6366
Whole Depth
The Circular Pitch
Multiply the Circular Pitch by .6866
D″ = C′ .6866
Clearance
The Circular Pitch
Multiply the Circular Pitch by .05
Clearance
Thickness of Tooth
One-Tenth theThickness of Tooth at Pitch Line
The continued product of the Number of Teeth plus 2, the Circular Pitch and .3183 Add to the Pitch Diameter the product of the Circular Pitch and .6366 Multiply Addendum by Number of Teeth plus 2 Divide the product of Pitch Diameter and 3.1416 by the Circular Pitch One-half the Circular Pitch
C′ = 3.1416 DP C′ = PD .3183N OD C′ = .3183 N + 2 D′ = NC′ .3183 D = N × OD N+2 D′ = OD – (C′ .6366) D′ = NA D = (N + 2) C′ .3183 D = PD + (C′ .6366) D = A (N + 2) N = PD3.1416 C′ C′ t= 2 A = C′.3183 A + L = C′ .3683
L = C .05 L= t 10
NOTE: Rules and Formulas Relating to Tooth Depth and Outside Diameter Apply to Full-Depth, Equal Addendum Gears.
Circular Pitch Gears Made To Order Only
19
Spur Gears
4/12/00
3:57 PM
Page 88
Circular Pitch Tooth Dimensions Dimensions of Standard Full-depth Teeth Circular Pitches and Equivalent Diametral Pitches Circular Pitch
Diametral Pitch
4 3-1⁄2 3 2- 3⁄4 2-1⁄2 2-1⁄4 2 1-7⁄8 1-3⁄4 1- 5⁄8 1-1⁄2 1-7⁄16 1-3⁄8 1-5⁄16 1-1⁄4 1-3⁄16 1-1⁄8 1-1⁄16 1 15 ⁄16 7 ⁄8 13 ⁄16 3 ⁄4 11 ⁄16 2 ⁄3 5 ⁄8 9 ⁄16 1 ⁄2 7 ⁄16 2 ⁄5 3 ⁄8 1 ⁄3 5 ⁄16 2 ⁄7 1 ⁄4 2 ⁄9 1 ⁄5 3 ⁄16 1 ⁄6
0.7854 0.8976 1.0472 1.1424 1.2566 1.3963 1.5708 1.6755 1.7952 1.9333 2.0944 2.1855 2.2848 2.3936 2.5133 2.6456 2.7925 2.9568 3.1416 3.3510 3.5904 3.8666 4.1888 4.5696 4.7124 5.0265 5.5851 6.2832 7.1808 7.8540 8.3776 9.4248 10.0531 10.9956 12.5664 14.1372 15.7080 16.7552 18.8496
Module
Arc Thickness of Tooth on Pitch Line
32.3402 28.2581 24.2552 22.2339 20.2117 18.1913 16.1701 15.1595 14.1488 13.1382 12.1276 11.6223 11.1169 10.6116 10.1062 9.6010 9.0958 8.5904 8.0851 7.5798 7.0744 6.5692 6.0639 5.5586 5.3903 5.0532 4.5479 4.0426 3.5373 3.2340 3.0319 2.6947 2.5266 2.3100 2.0213 1.7967 1.6170 1.5160 .5053
2.0000 1.7500 1.5000 1.3750 1.2500 1.1250 1.0000 0.9375 0.8750 0.8125 0.7500 0.7187 0.6875 0.6562 0.6250 0.5937 0.5625 0.5312 0.5000 0.4687 0.4375 0.4062 0.3750 0.3437 0.3333 0.3125 0.2812 0.2500 0.2187 0.2000 0.1875 0.1666 0.1562 0.1429 0.1250 0.1111 0.1000 0.0937 0.0833
Addendum
Working Depth of Tooth
Dedendum or Depth of Space Below Pitch Line
Whole Depth of Tooth
1.2732 1.1140 0.9549 0.8753 0.7957 0.7162 0.6366 0.5968 0.5570 0.5173 0.4775 0.4576 0.4377 0.4178 0.3979 0.3780 0.3581 0.3382 0.3183 0.2984 0.2785 0.2586 0.2387 0.2189 0.2122 0.1989 0.1790 0.1592 0.1393 0.1273 0.1194 0.1061 0.0995 0.0909 0.0796 0.0707 0.0637 0.0597 0.0531
2.5464 2.2281 1.9098 1.7506 1.5915 1.4323 1.2732 1.1937 1.1141 1.0345 0.9549 0.9151 0.8754 0.8356 0.7958 0.7560 0.7162 0.6764 0.6366 0.5968 0.5570 0.5173 0.4775 0.4377 0.4244 0.3979 0.3581 0.3183 0.2785 0.2546 0.2387 0.2122 0.1989 0.1819 0.1591 0.1415 0.1273 0.1194 0.1061
1.4732 1.2890 1.1049 1.0128 0.9207 0.8287 0.7366 0.6906 0.6445 0.5985 0.5525 0.5294 0.5064 0.4834 0.4604 0.4374 0.4143 0.3913 0.3683 0.3453 0.3223 0.2993 0.2762 0.2532 0.2455 0.2301 0.2071 0.1842 0.1611 0.1473 0.1381 0.1228 0.1151 0.1052 0.0921 0.0818 0.0737 0.0690 0.0614
2.7464 2.4031 2.0598 1.8881 1.7165 1.5448 1.3732 1.2874 1.2016 1.1158 1.0299 0.9870 0.9441 0.9012 0.8583 0.8154 0.7724 0.7295 0.6866 0.6437 0.6007 0.5579 0.5150 0.4720 0.4577 0.4291 0.3862 0.3433 0.3003 0.2746 0.2575 0.2289 0.2146 0.1962 0.1716 0.1526 0.1373 0.1287 0.1144
All Circular Pitch Gears Are Made-To-Order
20
Spur Gears
4/12/00
3:57 PM
Page 89
Spur Gear Dimensional Formulas Module Rules and Formulas For Module (Metric) Spur Gear Calculations (Module Represents the Amount of Pitch Diameter per Tooth) To Find
Having
Rule
Metric Module
Pitch Diameter and Number of Teeth
Metric Module
Circular Pitch in Millimeter
Divide Pitch Diameter in Millimeters by the Number of Teeth Divide Circular Pitch in Millimeters by Pi (3.1416)
Metric Module
Diametral Pitch
Divide 25.4 by Diametral Pitch
Metric Module
Outside Diameter and Number of Teeth
Pitch Diameter
Module and Number of Teeth
Divide Outside Diameter (in Millimeters) by the Number of Teeth plus 2 Multiply Module by Number of Teeth
Pitch Diameter
Number of Teeth and Outside Diameter
Pitch Diameter
Outside Diameter and the Module
Outside Diameter
Module and Number of Teeth
Divide the product of Outside Diameter and No. of Teeth by No. of Teeth plus 2 Multiply Module by 2 and Subtract from Outside Diameter Number of Teeth plus 2 Multiplied by Module
Diametral Pitch
Module
Divide 25.4 by Module
Circular Pitch
Module
Multiply Module by Pi (3.1416)
Addendum
Module Known
The Addendum equals the Module
Whole Depth
Module Known
Multiply 2.157 by Module
Thickness of Tooth
Module and Outside Diameter
English Module
Pitch Diameter in Inches and Number of Teeth
Multiply Pitch Diameter (in Millimeters) by the Sine of the Angle of 90 Divided by the Number of Teeth Divide Pitch Diameter in Inches by Number of Teeth
Formula
M = PD (Millimeters) N M = C (Millimeters) 3.1416 M = 25.4 DP M = OD N+2 D′ (In MM)= M x N D′ =OD x N N+2 D′ = OD - 2M OD (In MM) = (N + 2) x M DP = 25.4 M C′ (In MM) = M x 3.1416 A=M D″ (In MM) = 2.157 x M t (In MM) = PD (MM) x Sine 90 N M = PD (Inches) N (Answer in Fraction)
NOTE: Rules and Formulas Relating to Tooth Depth and Outside Diameter Apply to Full-Depth, Equal Addendum Gears.
21
Spur Gears
4/12/00
3:57 PM
Page 90
Module Pitch Tooth Dimensions Tooth Dimensions Based Upon Module System (One millimeter equals 0.03937 inch) Module, DIN Standard Series
Equivalent Diametral Pitch
Circular Pitch Millimeters
0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.25 1.5 1.75 2 2.25 2.5 2.75 3 3.25 3.5 3.75 4 4.5 5 5.5 6 6.5 7 8 9 10 11 12 13 14 15 16 18 20 22 24 27 30 33 36 39 42 45 50 55 60 65 70 75
84.667 63.500 50.800 42.333 36.286 31.750 28.222 25.400 20.320 16.933 14.514 12.700 11.289 10.160 9.236 8.466 7.815 7.257 6.773 6.350 5.644 5.080 4.618 4.233 3.908 3.628 3.175 2.822 2.540 2.309 2.117 1.954 1.814 1.693 1.587 1.411 1.270 1.155 1.058 0.941 0.847 0.770 0.706 0.651 0.605 0.564 0.508 0.462 0.423 0.391 0.363 0.339
0.943 1.257 1.571 1.885 2.199 2.513 2.827 3.142 3.927 4.712 5.498 6.283 7.069 7.854 8.639 9.425 10.210 10.996 11.781 12.566 14.137 15.708 17.279 18.850 20.420 21.991 25.132 28.274 31.416 34.558 37.699 40.841 43.982 47.124 50.266 56.549 62.832 69.115 75.398 84.823 94.248 103.673 113.097 122.522 131.947 141.372 157.080 172.788 188.496 204.204 219.911 235.619
Inches
Addendum, Millimeters
Dedendum, Millimeters†
0.0371 0.0495 0.0618 0.0742 0.0865 0.0989 0.1113 0.1237 0.1546 0.1855 0.2164 0.2474 0.2783 0.3092 0.3401 0.3711 0.4020 0.4329 0.4638 0.4947 0.5566 0.6184 0.6803 0.7421 0.8035 0.8658 0.9895 1.1132 1.2368 1.3606 1.4843 1.6079 1.7317 1.8541 1.9790 2.2263 2.4737 2.7210 2.9685 3.339 3.711 4.082 4.453 4.824 5.195 5.566 6.184 6.803 7.421 8.040 8.658 9.276
0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00 1.25 1.50 1.75 2.00 2.25 2.50 2.75 3.00 3.25 3.50 3.75 4.00 4.50 5.00 5.50 6.00 6.50 7.00 8.00 9.00 10.00 11.00 12.00 13.00 14.00 15.00 16.00 18.00 20.00 22.00 24.00 27.00 30.00 33.00 36.00 39.00 42.00 45.00 50.00 55.00 60.00 65.00 70.00 75.00
0.35 0.467 0.583 0.700 0.817 0.933 1.050 1.167 1.458 1.750 2.042 2.333 2.625 2.917 3.208 3.500 3.791 4.083 4.375 4.666 5.25 5.833 6.416 7.000 7.583 8.166 9.333 10.499 11.666 12.833 14.000 15.166 16.332 17.499 18.666 21.000 23.332 25.665 28.000 31.498 35.000 38.498 41.998 45.497 48.997 52.497 58.330 64.163 69.996 75.829 81.662 87.495
† Dedendum and total depth when clearance = 0.1666 x module, or one-sixth module. ‡ Total Depth equivalent to American standard full-depth teeth. (Clearance = 0.157 x Module.)
22
Whole Depth,† Millimeters
Whole Depth,‡ Millimeters
0.650 0.867 1.083 1.300 1.517 1.733 1.950 2.167 2.708 3.250 3.792 4.333 4.875 5.417 5.958 6.500 7.041 7.583 8.125 8.666 9.750 10.833 11.916 13.000 14.083 15.166 17.333 19.499 21.666 23.833 26.000 28.166 30.332 32.499 34.666 39.000 43.332 47.665 52.000 58.498 65.000 71.498 77.998 84.497 90.997 97.497 108.330 119.163 129.996 140.829 151.662 162.495
0.647 0.863 1.079 1.294 1.510 1.726 1.941 2.157 2.697 3.236 3.774 4.314 4.853 5.392 5.932 6.471 7.010 7.550 8.089 8.628 9.707 10.785 11.864 12.942 14.021 15.099 17.256 19.413 21.571 23.728 25.884 28.041 30.198 32.355 34.512 38.826 43.142 47.454 51.768 58.239 64.713 71.181 77.652 84.123 90.594 97.065 107.855 118.635 129.426 140.205 150.997 161.775
Spur Gears
4/12/00
3:57 PM
Page 91
Bevel & Miter Gear Formulas To Find
Rule
Formula
Pitch Diameter
Divide Number of Teeth by Diametral Pitch
Tangent of Pitch Angle Of Driven Pitch Angle of Driver
Divide Number of Teeth in Driven by Number of Teeth in Driver Subtract Pitch Angle of Driven from 90 Degrees
Pitch Cone Radius Tangent of Addendum Angle
Divide Pitch Diameter by Twice the Sine of the Pitch Angle Divide Addendum by the Pitch Cone Radius
Face Angle
Add Addendum Angle to Pitch Angle
Pitch Diamter 2 x Sine Pitch Angle Addendum Tangent of Addendum Angle = Pitch Cone Radius Face Angle = Addendum Angle + Pitch Angle
Tangent of Dedendum Angle
Divide Dedendum by the Pitch Cone Radius
Tangent of Dedendum Angle =
Root Angle
Subtract Dedendum Angle from Pitch Angle
Dedendum Pitch Cone Radius Root Angle = Pitch Angle - Dedendum Angle
Angular Addendum
Multiply Addendum by Cosine of Pitch Angle
Angular Addendum = Addendum x Cosine Pitch Angle
Outside Diameter
Add 2 Angular Addenda to Pitch Diameter
Outside Diameter = 2 Angular Addenda x Pitch Diamter
Mounting Distance
Add one-half the Pitch Diameter of Mating to Pitch Line Multiply one-half Outside Diameter by Co-tangent of Face Angle Subtract Cone Center to Crown from Mounting Distance Divide Teeth in Driven by Teeth in Driver
Mounting Distance = Pitch Diameter of Mate + Backing to Pitch Line 2 Outside Diameter x Co-Tangent Face Angle Cone Center to Crown = 2 Backing to Crown = Mounting Distance - Cone Center to Crown
Distance From Cone Center to Crown Backing to Crown Ratio
Pitch Diameter = Number of Teeth Diametral Pitch Tangent Pitch Angle of Driven = Number of Teeth in Driven = Ratio Number of Teeth in Driver Pitch Angle Of Driver = 90 Degrees - Pitch Angle of Driven Pitch Cone Radius =
Ratio = Number of Teeth in Driven Number of Teeth in Driver
23
Spur Gears
4/12/00
3:57 PM
Page 92
Formula For Worm Gears (Based On Diametral Pitch) To Find
Rule
Divide Number of Teeth by Diametral Pitch
Worm Gear Throat Diameter
Add 2 Addenda to Pitch Diameter
Pitch Diameter = Number of Teeth in Worm Gear Diametral Pitch Throat Diameter = (2 x Addendum) + Pitch Diameter
Worm Gear Outside Diameter
Add 3 Addenda to Pitch Diameter
Outside Diameter = (3 x Addendum) + Pitch Diameter
Worm Pitch Diameter
Subtract the Worm Gear Pitch Diameter from Twice the Center Distance Add 2 Addenda to Worm Pitch Diameter
Worm Pitch Diameter = (2 x Center Distance) - Worm Gear Pitch Diameter Worm Outside = Worm Pitch Diameter + 2 x Addendum Diameter 3.1416 Worm Lead = x Number of Threads in Worm Diametral Pitch Co-Tangent Worm = Worm Pitch Diameter x Diametral Pitch Helix Angle Number Worm Threads Center = Worm Pitch Diameter + Worm Gear Pitch Diameter Distance 2 Number of Teeth in Worm Gear Ratio = Number of Worm Threads
Worm Outside Diameter Worm Lead Co-Tangent of Worm Helix Angle Center Distance Ratio
Divide 3.1416 by Diametral Pitch and Multiply by Number of Threads in Worm Multiply Worm Pitch Diameter by Diametral Pitch and Divide by Number of Worm Threads Add Worm Pitch Diameter to Worm Gear Pitch Diameter and Divide Sum by 2 Divide Number of Teeth in Worm Gear by Number of Worm Threads
NOTE: Tooth data (Addendum, Full Depth, Etc.) is same as for Spur Gears.
26
Formula
Worm Gear Pitch Diameter
Spur Gears
4/12/00
3:57 PM
Page 93
Cut Spur Gears 141⁄2° P.A. Comparative Sizes of Involute Gear Teeth
1 Diametral Pitch 3.1416″ Circular Pitch
11⁄4 Diametral Pitch 2.5133″ Circular Pitch
CIRCULAR PITCH
11⁄2 Diametral Pitch 2.0944″ Circular Pitch 25
Spur Gears
4/12/00
3:57 PM
Page 94
Cut Spur Gears 141⁄2° P.A. Comparative Sizes of Involute Gear Teeth
13⁄4 Diametral Pitch 1.7952″ Circular Pitch
2 Diametral Pitch 1.5708″ Circular Pitch
21⁄2 Diametral Pitch 1.2566″ Circular Pitch
3 Diametral Pitch 1.0472″ Circular Pitch
31⁄2 Diametral Pitch .8976″ Circular Pitch
4 Diametral Pitch .7854″ Circular Pitch
28
5 Diametral Pitch .6283″ Circular Pitch
6 Diametral Pitch .5236″ Circular Pitch
Spur Gears
4/12/00
3:57 PM
Page 95
Cut Spur Gears 141⁄2° P.A. Comparative Sizes of Involute Gear Teeth
7 Diametral Pitch .4488″ Circular Pitch
8 Diametral Pitch .3927″ Circular Pitch
10 Diametral Pitch .3142″ Circular Pitch
12 Diametral Pitch .2618″ Circular Pitch
14 Diametral Pitch .2244″ Circular Pitch
16 Diametral Pitch .1963″ Circular Pitch
18 Diametral Pitch .1745″ Circular Pitch
20 Diametral Pitch .1571″ Circular Pitch
Gear Rack Comparison — 141⁄2 and 20°
3 DP — 141⁄2°
3 DP — 20°
4 DP — 141⁄2°
4 DP — 20°
5 DP — 141⁄2°
5 DP — 20°
6 DP — 141⁄2°
6 DP — 20°
29
Spur Gears
4/12/00
3:57 PM
Page 96
Gear Materials Stock Steel Gears Martin
steel gears are manufactured from high quality carbon steel material. This material is used for strength and good hardening characteristics. These gears may be hardened by any method acceptable to good practice such as flame or induction hardening. Flame hardening is preferred so that only the teeth are hardened. Distortion is virtually eliminated and the bore is left soft for subsequent work.
Cast Gears Martin cast iron gears are manufactured from high quality close grained controlled specification irons.
Reboring of Stock Gears Most of
Martin’s Stock Gears may be rebored. The maximum recommended bore size is given for each gear. In reboring gears,
care must be taken to hold the bore concentric with the pitch diameter. In most cases this would require a great amount of time. To cut costly set-up time when reboring,
Martin holds the outside diameter of its gears concentric with the bore which in turn is con-
centric with the pitch diameter. The outside diameter is held to a closer total indicator reading than the pitch diameter. In the finer pitches, care should be taken not to distort the outside diameter when chucking.
Martin ’s steel gears are machined all over. Rebore or rework may be accomplished by chucking on the hub. Concentricity must be controlled in order for gears to run at maximum efficiency.
30
Spur Gears
4/12/00
3:57 PM
Page 97
Extensive stockyards of screws are available for quick shipment.
A broad inventory of equipment ensures prompt worldwide delivery.
Quality mat e rial and an experienced st a ff means a rapid turna round for you, our cust o m e r.
SERVICE CENTERS WORLDWIDE USA
Mini Manufacturing Centers
General Offices Sales and Manufacturing
Boston, MA
Arlington, TX 3100 Sprocket Drive 76015-2898 P.O. Box 91588 • Arlington, Texas 76015-0088 817-258-3000 (FAX 817-258-3333)
Sales and Manufacturing Danielsville, PA 3376 Delps Road 18038 P.O. Box 267 • Danielsville, PA 18038-0267 610-837-1841 (FAX 610-837-7337)
Ft. Worth, TX (Conveyor Division) 3600 McCart Street (76110-4692) P.O. Box 1038 • Ft. Worth, TX 76101-1038 817-258-3000 (FAX 817-258-3173)
Mansfield, TX 811 4th Avenue 76063 P.O. Box 193 • Mansfield, TX 76063-0193 817-473-1520 (FAX 817-473-0465)
357 Fortune Boulevard Milford, MA01757 508-634-3990 (FAX 508-634-3998)
Charlotte, NC 3901 South I-85 Service Road 28208 Box 19447 • Charlotte, NC 28219-0447 704-394-9111 (FAX 704-394-9122)
Chicago, IL 1505 Birchwood Avenue 60018-3001 P.O. Box 1307 • Des Plaines, IL 60017-1307 847-298-8844 (FAX 847-298-2967)
Denver, CO 10800 East 54th Avenue 80239 P.O. Box 39208 • Denver CO 80239-0208 303-371-8466 (FAX 303-371-7116)
Houston, TX 9910 Bent Oak Drive 77040 P.O. Box 41209 • Houston, TX 77241-1209 713-849-4330 (FAX 713-849-4807)
Montpelier, OH
Kansas City, MO
350 Airport Road 43543 P.O. Box 29 • Montpelier, OH 43543-0029 419-485-5515 (FAX 419-485-3565)
1520 N. Commerce Avenue 64120 P.O. Box 4961 • Kansas City, MO 64120-4961 816-231-5575 (FAX 816-231-1959)
Sacramento, CA
Los Angeles, CA
1199 Vine Street 95814-0426 5920 S. Triangle Dive P.O. Box 13856 • Sacramento, CA 95853-3856 Commerce, CA 90040-3688 916-441-7172 (FAX916-441-4600) 323-728-8117 (FAX 323-722-7526)
Scottdale, GA
Minneapolis, MN
3303 Church Street 30079-1395 P.O. Box 886 • Scottdale, GA 30079-0886 404-292-8744 (FAX404-292-7771)
10601 Hampshire Avenue South Bloomington, MN 55438-2395 952-829-0623 (FAX 952-944-9385)
Ft. Worth, TX (Tool & Forge Division)
Portland, OR
3600 McCart Street 76110-4692 P.O. Box 1038 • Ft. Worth, TX 76101-1038 817-258-3000 (FAX 817-258-3173)
3030 N.W. Industrial Portland, OR 97210-0046 503-223-7261 (FAX 503-221-0203)
3201 Queen Palm Drive Tampa FL 33619 813-623-1705 (FAX 813-626-8953)
Wayne, NJ 7 High Point Drive 07470-7432 P.O. Box 527 • Wayne, NJ 07474-0527 973-633-5700 (FAX 973-633-7196)
Manufacturing Only Abilene, TX Clarksville, TX San Angelo, TX Paragould, AR (Includes the Plastics Div.)
CANADA
Sales and Manufacturing
Martin Sprocket & Gear Canada Inc. 896 Meyerside Drive Mississauga, Ontario, Canada L5T 1R9 905-670-1991 (FAX 905-670-2110)
Martin Sprocket & Gear Canada Inc. (Conveyor Division) Box C3, RR #1 Ayr. Ontario, Canada NOB IEO 519-621-0546 (FAX 519-621-4413)
CHINA Hong Kong Shanghai Fuzhou Chengdo
MEXICO
Sales and Manufacturing
Martin
Sprocket & Gear de Mexico, S.A. de C.V.
Km 52.8 Carretera, Naucalpan-Toluca Parque Industrial, Toluca 2000 Calle 3, Manzana VII, Lote 11 Toluca Edo. de Mexico, C.P. 50200 011-52-72-790023 (FAX 011-52-72-790024)
Tampa, FL
Sold by the World’s Greatest Sales People. Our Distributors.
Martin
SPROCKET & GEAR, INC. 3100 SPROCKET DR. • ARLINGTON, TX 76015 • 817-258-3000
Martin Products are made in North America. For more information, contact your nearest Martin Distributor or Service Center. COPYRIGHT 1999 •
Martin SPROCKET & GEAR, INC. • ALL RIGHTS RESERVED