Coated / Uncoated SUMIBORON
H Hardened Steel
BNC300 / BN350
The ultimate grades BNC300 and BN350 in interrupted machining of hardened steel -
BNC300
General Features
l BNC300
CBN substrate that emphasizes on toughness coupled with a highly wear resistant TiAIN based coating layer that has improved adhesion strength. With a good balance of fracture and wear resistance, stable and longer tool life can be achieve in interrupted cut or in a mixture of continuous and interrupted cutting.
l BN350
BN350 -
SUMIBORON series highest fracture resistance and toughest CBN. Reliable grade for achieving stable tool life in heavy interrupted cutting conditions.
Characteristics
BNC300 l Stable and long tool life in interrupted cutting
Achieving stable and long tool life in heavy interrupted cutting, with superior fracture resistance.
l Superior dimensional precision Good adhesion strength, TiAIN based, high wear resistance coating. Achieving superior dimensional precision even in interrupted cutting. l Suitable for different types of workpieces Achieving significantly longer tool life even on workpieces that have a mixture of continuous and interrupted cutting.
BN350 l Stable and long tool life in interrupted cutting
Stable and long tool life with superior fracture resistance, that prevents fractures which commonly occurs during interrupted cutting.
-
Performance
Competitor´s coated CBN
Heavy Interrupted Machining (Frequency of Interruption 100%)
BN350
Competitor´s uncoated CBN
Width of Flank Wear (mm)
Width of Flank Wear (mm)
Continuous ~ Light Interrupted Machining (Frequency of Interruption 50%)
(Breakage)
BNC300 Prolonged Performance
-
Prolonged Performance
Cutting Length (km) Work material: Insert type: Cutting data:
15CrMo5 (HRC58-62) CNGA 120408 NC-4 vc = 120 m/min, f = 0,1 mm/rev, ap = 0,2 mm, dry
15CrMo5 (HRC58-62) CNGA 120408 NU-2 vc = 100 m/min, f = 0,1 mm/rev, ap = 0,2 mm, dry
Frequency of Interruption
Uncoated SUMIBORON Cutting speed (m/min)
Cutting speed (m/min) Interruption Strength
BNC 100
BNC 160
BNC200
light
Recommended Cutting Conditions (BNC300, BN350)
1
BNC300
medium
heavy
Interruption Strength
50 l
BN1000
BNX20
BNX25
BN350
BN2000
light
medium
1
vc (m/min) 100
80
l
120
150 l
200 l
f (mm/rev)
d oc (mm)
SUMI BORON
Recommended Application Range
Coated SUMIBORON
(Breakage)
BN350
Cutting Length (km) Work material: Insert type: Cutting data:
BNC300
(Breakage)
0,03–0,2 0,03–0,3
Coolant ... Interrupted cutting: dry
heavy
Frequency of Interruption
L17