B23/B30High-speed finishing of gray cast iron| Uncoated CBNs

Best CBN grades for machining gray cast iron

High-speed machining up to 4000 SFM

Highly effective machining even surpassing ceramic


  • B23 & B30 grades have high CBN content to enhance wear resistance characteristics
  • Perform ultra-high speed machining of up to 4000 SFM

Tooling application

Gray cast iron
B23 for roughing to semi-finish turning operations
B30 for semi-finish to finish turning operations

Grade characteristics

Cutting conditions

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Grade Material Operation type Machining Cutting speed (SFM) Feed(IPR) DOC(inch) Coolant
B23/B30 Gray cast iron Turning High-speed finishing 1300 - 4500 .040 - .020 .008 - .080 DRY/WET

Cost effective: Double-sided & multi-cornered CBN

Case study

OD turning of oil pump housing
Material :
Cutting speed :
830 SFM
Feed :
.0079 IPR
.0787 inch
Coolant :

210 pcs / corner

Competitor's CBN

70 pcs / corner

The B23 insert was 3 times more productive than the competitor's insert.
Continuous ID bore operation on a cylinder block
Material :
Gray cast iron
Cutting speed :
2660 SFM
Feed :
.0118 IPR
.0039 inch
Coolant :

800 pcs / corner

Competitor's CBN

500 pcs / corner

B30 achieved 1.6 times the tool life compared to competitor's CBN.

Tool lineup

Please check product catalog for tooling lineup

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