Hardened Steel

Recommended CBN Grades and Chipbreakers

Grades BNC2010 / BNC2020 / BN1000 / BN2000

BNC2010:A grade for high-precision machining applicable for finishing requiring good surface roughness and dimensional accuracy.
Provides further improved wear resistance thanks to a newly developed CBN substrate coated with a TiCN layer.
Reduces flank wear and achieves excellent surface finish thanks to newly developed special stable multi-layered coating.
BNC2020:A general-purpose grade applicable to general hardened steel machining.
A newly developed tough CBN-substrate coated with a highly wear-resistant TiAlN layer.
Achieves more stable machining and longer tool life by employing a highly adhesive layer for high chipping resistance.
BN1000:For high speed machining. BN1000 provides the highest wear resistance of all uncoated SUMIBORON grades.
Features improved fracture resistance while still placing a priority on wear resistance.
BN2000:General purpose grade suitable for typical hardened steel machining applications.

Provides a high degree of fracture and wear resistance. Performance BNC2010 BNC2020 7

Conventional Coated CBN

6BNC2020
5
4Conventional coated CBN
Flank wear occurs Conventional1,8 times
coated CBNthe
3conventional
BNC2010tool life
2
●■Competitor‘s
1coated CBN

0 1,0 2,0 3,0 4,0 BNC2010 0 2,5 5,0

Cutting Distance (km) Reduced flank wear Cutting Distance (km)

Work Material:15CrMo5, 58-62HRC, ContinuousWork Material:SCM415-5V, 58-62HRC, Interrupted
Insert:DNGA 150408 NC4 (BNC2010)Insert:CNGA 120412 NC4 (BNC2020)
Cutting Edge Treatment: S01225Cutting Edge Treatment: S01225
Cutting Conditions:vc=160m/min, f=0,08mm/rev, ap=0,1mm, WetCutting Conditions:vc=130m/min, f=0,1mm/rev, ap=0,6mm, Dry
BN1000 / BN2000
l Wear Resistance (Continuous Cutting)lChipping Resistance (Interrupted Cutting)

Competitor 1 (Comparison based on conventional BN2000 as 100%.) Breakage BN2000 BN2000 Approx. 1,4x tool life! Conventional

Grade 1

Competitor 1 Cutting Distance (km) Work Material: 15CrMo5, Round Bar (58-62HRC) Cutting Conditions: v =100m/min, f=0,1mm/rev, a =0,2mm, Dry

c p BN1000 Approx. 1,4x tool life!

Competitor 2 Conventional BN1000 Grade 2 Competitor 2

Tool Life Ratio (%) Cutting Distance (km) Work Material: 15CrMo5, 8V Grooved Material (58-62HRC) Work Material: 100Cr6, Round Bar (58-62HRC) Insert: CNGA120408 NU-2 Cutting Conditions: v =150m/min, f=0,1mm/rev, a =0,2mm, Dry Cutting Conditions: v =150m/min, f=0,1mm/rev, a =0,2mm, Dry

c p c p