B5K/B52For continuous-light interruption machining ｜ CBN for machining hardened material

High performance, low cost, versatile CBN

CBN grades ideal for high-precision machining

Roughing to finishing continuous cut operations
Ideal for hardened materials of HRC 55 or higher

Product video

Features

  • Excellent wear resistance due to optimum CBN content and special TiC binders
  • Continuous to light interrupted machining
  • B5K - coated CBN grade:
    Ideal for machining the hardened material layer and the inner lower hardened layer. A special hard TiCN layer prevents a chemical reaction between the CBN and the iron in the work piece during material removal.
    B52 - uncoated CBN grade:
    Ideal for machining the hardened material layer.

Tooling application

Continuous operations for hardened material at HRC55 or above

Grade application chart

Cutting conditions

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●1st Recommendation
〇2nd Recommendation
Grade Material Operation type Machining Cutting speed (SFM) Feed(IPR) DOC(inch) DRY WET
B5K/B52 Hardened material (HRC55 or above) Turning Continuous machining Finishing 330 - 1000 .002 - .008 .004 - .040 〇 ●

Edge preparations

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Performance comparison by edge preparation

As the edge preparation increases the tool pressure on the insert increases.
[ Cutting conditions ]
SCM415(HRC63-65) 670 SFM f=.004 IPR p=.008 inch DRY
[ Insert ]
TNGA160408
There is a direct correlation between an increase in the edge preparation and improvement of insert fracture resistance.
[ Cutting conditions ]
SCM415(HRC63-65) 250 SFM .004 IPR .012 DOC DRY
[ Insert ]
TNGA160408

Case study

OD Turning of shaft parts
Material :
SUS440C(HRC58-60)
Cutting speed :
500 SFM
Feed :
.004 IPR
DOC :
.008 inch
Coolant :
DRY
B5K

6 pcs / corner
Competitor's coated CBN

3 pcs / corner
B5K achieved 2 times longer tool life.
Due to dimensional changes and deterioration of the machined surface the competitor's coated CBN needed to be changed.
ID boing of automotive parts
Material :
Carbon steel(HRC56-58)
Cutting speed :
630 SFM
Feed :
.002 IPR
DOC :
.010 inch
Coolant :
WET
B52

240 pcs / corner
Competitor's coated CBN

200 pcs / corner
B52 insert achieved 1.2 times higher tool life than the competitor's coated CBN insert.

Tool lineup

Please check product catalog for tooling lineup

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