B40

For heavy interrupted machining ｜ CBN for machining hardened material

High performance, low cost CBN

Recommended for heavy interrupted cuts

Excellent toughness and stable machining Ideal for hardened materials of HRC 55 or higher

Heavy interrupted machining of hardened materials of HRC55 or above

As the edge preparation increases the tool pressure on the insert increases.

[ Cutting conditions ]
SCM415(HRC63-65) vc=200m/min f=0.1mm/rev ap=0.2mm 670 SFM .004 IPR .008 DOC 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) vc=75m/min f=0.1mm/rev ap=0.3mm 250 SFM .004 IPR .012 DOC DRY

[ Insert ]
TNGA160408

Cutting conditions

- - - Scroll the table - - -

Grade	Material	Operation type	Machining	Cutting speed (m/min) Cutting speed (SFM)	Feed(mm/rev) Feed(IPR)	DOC(mm) DOC(inch)	DRY	WET
						●1st Recommendation 〇2nd Recommendation
B40	Hardened material (HRC 55 or above)	Turning Heavy interrupted machining	Finishing	30 – 150 100 – 500	~ 0.1 ~ .004	0.1 – 1.0 .004 – .040	●	〇

Case study

Interrupted ID boring of automotive parts
Material : S55C ( HRC62 )
Cutting speed : 110 m/min 370 SFM
Feed : 0.14 mm/rev .006 IPR
DOC : 0.15 mm .006 inch
Coolant : DRY
B40	2,300 pcs / corner
Competitor’s CBN	1,500 pcs / corner

B40 achieved longer tool life through the heavy interruptions without chipping

Interrupted OD turning gear part coupling
Material : S50C ( HRC61 )
Cutting speed : 28 m/min 90 SFM
Feed : 0.12 mm/rev .005 IPR
DOC : 0.25 mm .010 inch
Coolant : WET
B40	400 pcs / corner
Competitor’s CBN	100 pcs / corner

Competitor’s CBN had edge damage due to interruptions. B40’s excellent toughness achieved 4 times longer tool life.

For more information about this product, visit our online e-catalog, or download the catalog/product report