SUMIBORON for Hardened Interrupted Steel Machining BNC300 / BN350
Hardened Steel
The Ultimate in Interrupted Cutting of Hardened Steel
■ General Features BNC300
BNC300
A CBN substrate that emphasizes toughness is coupled with a highly wear-resistant TiAlN-based coating layer that has improved adhesion strength. With a good balance of fracture and wear resistance, this grade achieves a long, stable tool life in interrupted cutting or in a mixture of continuous and interrupted cutting. BN350 CBN - SUMIBORON with the highest fracture resistance and toughest CBN. Reliable grade for achieving stable tool life in heavy interrupted cutting conditions.
L
BN350
■ Features
· Long, stable tool life in interrupted cutting Achieving long, stable tool life in heavy interrupted cutting, with superior fracture resistance. · Superior dimensional tolerance TiAlN-based high-wear-resistance coating with good adhesion strength. Achieves superior dimensional tolerance even in interrupted cutting. · Supports various work material shapes Achieves long, stable tool life even in workpieces requiring both continuous and interrupted cutting. · Superb stability with regard to fracture Superior fracture resistance, preventing the fractures that commonly occur during interrupted cutting. Achieves a long, stable tool life.
● BNC300
● BN350
■ Cutting Performance
Continuous + Mid Interrupted Cut (Interrupted Cutting 50%)
Heavy Interrupted Cutting: (Interrupted Cutting 100%)
Competitor's CBN: Fracture
Competitor's Coated CBN: Fracture
BN350
.0039
.0039
D
BNC300 : Fracture
D
Coating chip-off
D
F D D
D
D
.0019
D
.0019
BNC300 Able to Continue
D D
BN350 Able to Continue D
D D
D
D
0
8
16
24
32
0
20 Time in Cut (minutes) 10
30
Time in Cut (minutes)
Part Material: 5120 Chromium Steel (58 to 62 HRC) Tool Cat. No.: 4NC-CNGA432 Cutting Conditions: v c = 400 SFM, f = .0039 IPR, a p = .0079” Dry
Part Material: 5120 Chromium Steel (58 to 62 HRC) Tool Cat. No.: 2NU-CNGA432 Cutting Conditions: v c = 330 SFM, f = .0039 IPR, a p = .0079” Dry
● BNC300 has a superior balance of fracture and wear resistance.
● BN350 exhibits very good fracture resistance.
■ Application Range
■ Recommended Cutting Conditions (BNC300/BN350 common)
● CBN (SUMIBORON)
● Coated CBN (SUMIBORON)
1000
1000
BNC100
165 265 330 400 500 Cutting Speed v c (SFM)
BN1000
BNC160
BNC2010
660
660
BNC2020 BNC200
BNX25
BN2000
BNX20
400 330
BN350
330
Feed Rate f (IPR) Depth of Cut a p (inch) .0012 - .0079 .0012 - .0118 Coolant: Dry
BNC300
Light Interrupted Medium Interrupted Heavy Interrupted Continuous
Light Interrupted Medium Interrupted Heavy Interrupted Continuous
Small
Impact Force on Cutting Edge Large
Small
Impact Force on Cutting Edge Large
L15
Made with FlippingBook flipbook maker