Uncoated SUMIBORON H

BN1000/BN2000 Hardened Steel

Uncoated CBN grades for hardened steel machining

- General Features

A new uncoated type of SUMIBORON that has a newly

developed high-purity ceramic binder.

Both fracture and wear resistance are combined to achieve a

stable tool life in a wide variety of hardened steel machining. Available in single corner and multi-corner type inserts.

Characteristics

l BN1000- Superior high-speed machining grade with the highest wear resistance of any Sharpness Comparison
uncoated SUMIBORON.
Delivers excellent tool life in continuous cutting to light-interrupted cutting.BN2000Conventional

- Improved fracture resistance while also emphasizing wear resistance. Grade Improved hardness and heat resistance from the high-purity TiCN ceramic binder. l BN2000 - General purpose grade suitable for typical hardened steel machining applications. Provides stable tool life in everything from continuous cutting to light-to-medium

interrupted cutting. - High degrees of both fracture resistance and wear resistance. Significant improvements in the performance of both by employing a high-purity Compared to conventional grades, ceramic binder. small cutting edge roundness - Stable surface roughness by increasing sharpness (Figure on right).

Newly Developed High-Purity Ceramic Binder

l Conventional Grade l BN1000 / BN2000

Ceramic Binder Cracks High-purity Ceramic Binder

Impurities Reduced Sharpness

The impurities contained in the ceramic binder for conventionalWith the newly developed high-purity ceramic
grades cause a weakening in the sintered body andbinder, the BN1000 / BN2000 achieve toughness
a decrease in heat resistance, which becomes the cause of cracksand improved heat resistance by decreasing
(chipping) and wear.impurities to an extreme!
Recommended Application RangeCutting Conditions
l Continuous Cuttingl BN1000 l Interrupted Cutting
vc (m/min)fd
oc
100 150 200 250 300(mm/rev)(mm)
lllll
120
0,03-0,15 0,03-0,2
l BN2000
v(m/min)fd
coc
50 100 150 200 250(mm/rev)(mm)
Interruptionlllll
Strength80 120
lightmediumheavy0,03-0,2 0,03-0,3
Depth of cutFrequency
(mm)ofCoolant ... Continuous cutting: Dry or Wet
Feed rateInterruptionk

(mm/rev) Interrupted cutting: Dry