Chipbreaker and Grade Selection Guide for Turning Hardened Steel
Hardened Steel
Grades
BNC2010 / BNC2020 / BN1000 / BN2000
BNC2010 : For high-precision finishing requiring good surface roughness and dimensional tolerance. Maintains excellent surface roughness thanks to coating with high boundary wear resistance and CBN substrate.
BNC2020 : General-purpose grade suitable for typical hardened steel machining applications.
Achieves long tool life thanks to highly wear-resistant, highly adhesive coating and tough CBN substrate.
BNC2010 / BNC2020
BN1000 : For high-speed machining, BN1000 provides the highest wear resistance of all uncoated
SUMIBORON grades, improving fracture resistance while maintaining an emphasis on wear resistance.
BN2000 : General-purpose grade for general hardened steel machining with a high degree of fracture and wear resistance.
A
Performance
BNC2010
BNC2020
● Continuous Cutting of Hardened Steel
● Interrupted Cutting of Hardened Steel
Stable cutting
42
After Cutting 30min
After Cutting 50min
■
Conventional Tool
36
BNC2020
30
After Cutting 20min
Conventional Tool Boundary wear occurs
■
24
●
Conventional Tool
■
After Cutting 50min
18
●
BNC2010
●
12
After Cutting 15min
■ ●
Competitor's Product A
6
0
BNC2010 Reduces boundary wear
25 37.5 50
12.5
0
20
40
Cutting Time (min)
Tool Life (minutes)
Workpiece Material: SCM415 58-62HRC (Continuous) Insert: 4NC-DNGA432 Cutting Edge Treatment: S01225 Cutting Conditions: v c =525 SFM, f =0.003 IPR, a p =0.004”, Wet
Workpiece Material: SCM415-5V 58-62HRC (Interrupted Cutting) Insert: 4NC-CNGA432 Cutting Edge Treatment: S01225 Cutting Conditions: v c =426 SFM, f =0.004 IPR, a p =0.024”, Dry
BN1000 / BN2000
● Wear Resistance (Continuous Cutting)
● Chipping Resistance (Interrupted Cutting) (Conventional tool A as 100%)
.0010
Able to Continue
Breakage Unable to Continue
BN2000
Competitor's Product B
Approx. 1.4 times that of conventional tools!
.008
BN2000
Breakage caused by crater wear
.006
Conventional Tool A
BN2000
Competitor's Product B
.004
.002
Fracture life improved!
Competitor's Product D
0
60
80
100
20
40
Cutting Distance (minutes)
Workpiece Material: SCM415H Round Bar (58-62HRC) Insert: 2NU-CNGA432 Cutting Conditions: v c =330 SFM, f =0.004 IPR, a p =0.008”, Dry
Approx. double that of conventional tools!
BN1000
Conventional Tool B Competitor's Product E
.006
BN1000 Competitor's Product C
Competitor's Product C
.0045
Unacceptable Amount of Wear
.003
BN1000
0
50
100
150
.0015
Tool Life Ratio (%)
Excellent wear resistance!
0
20
7
13
Cutting Distance (minutes)
Workpiece Material: SCM415H 8V Grooved (58-62HRC) Insert: 2NU-CNGA432 Cutting Conditions: v c =492 SFM, f =0.004 IPR, a
Workpiece Material: 51200 Round Bar (62HRC) Insert: 2NU-CNGA432 Cutting Conditions: v c =492 SFM, f =0.004 IPR, a
p =0.008”, Dry
p =0.008”, Dry
A21
Made with FlippingBook Ebook Creator