CBN / Coated CBN CBN Grade Guidance
Hardened Steel
Cast Iron
Exotic Alloy
ROLL MACHINING
● Advantages of roll machining with CBN - SUMIBORON CBN - SUMIBORON enables the machining of high-hardness rolls that were previously difficult to machine with conventional tools, drastically improving machining efficiency.
Recommended Cutting Conditions
Recommended Grade
Part Material
Recommended Cutting Conditions Cutting Speed v c (SFM)
90
BNC8115 BNS8125 BN7125 BN7000
Feed Rate f (IPR)
Depth of Cut a p (Inch)
BNX20 Die Steel
High Speed Steel
Category Hardness (HS)
65 130 200 265 330 400 465
L
80
.0079 - .1181
.0039 - .0197
Adamite Chilled cast iron High-alloy cast iron
≥ 40
Hard Cast Iron Chilled Cast Iron High Alloy Cast Iron
70
BN500
.0079 - .1181
≥ 60
.0039 - .0197
Ductile Cast
60
.0079 - .1181
≥ 60
.0039 - .0197
Iron Adamite
BNX20
50
.0039 - .1181
HSS
.0039 - .0157
≥ 70
Finishing to Medium to Roughing Roll stand (example for bar steel rolling)
HARD FACING ALLOY MACHINING
● Advantages of hard facing alloy machining with CBN - SUMIBORON CBN - SUMIBORON enables the machining of high-hardness facing alloys that were previously difficult to machine with conventional tools, drastically improving machining efficiency. The first recommended grade is BN7000, followed by BNS800.
Performance
Recommended Cutting Conditions
Whisker Reinforced Ceramic ( v c = 165 SFM)
Part Material
Recommended Cutting Conditions
.0039
165 330 660 1000 Cutting Speed v c (SFM)
Feed Rate f (IPR)
Depth of Cut a p (inch)
Category Material
Ni-Based Self-Fluxing Alloy Co-Based Self-Fluxing Alloy
Colmonoy No.6
BNS800 ( v c = 1000 SFM)
.0019
.0019 - .0079
.0039 - .1181
BN7000 ( v c = 1000 SFM)
.0019 - .0079
.0039 - .0394
Stellite
0 40
80 120 160 200
Time in Cut (minutes)
● BN7000 has a long tool life and minimal wear with high speed cutting Work Material: Colmonoy No.6 (NiCr-Based Self-Fluxing Alloy) Tool Cat. No.: SNG322 Cutting Conditions: f = 0.0039 IPR, a p = .0079" Dry
Hardened Stainless Steel Machining
D Advantages of machining hardened stainless steel with SUMIBORON SUMIBORON enables the machining of hardened stainless steel, previously difficult to machine with conventional tools, drastically improving machining efficiency. The first recommended grade is BN1000. When strength is required, we recommend BN2000.
Cutting Performance
Recommended Cutting Conditions
.0040
Work Material
Recommended Cutting Conditions
BN2000
Cutting Speed vc (SFM) 165 330 660 990
Feed Rate f (IPR)
Depth of Cut ap (Inch)
.0032
Category
.0024
Hardened Stainless Steel
.001 to .008
.001 to .012
.0016
BN1000
.0008
0
.37
.12
.25
Cutting Distance (Miles)
Work Material Tool Cat. No.
: SUS440C (59 to 61HRC, continuous)
: 2NU-CNGA120408 Cutting Conditions : vc = 660 SFM, f = .004 IPR, ap = .004", Wet
L10
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