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Case 06 · Internal cutting test

KBN7030 — Interrupted turning of SCM440H (42CrMoH) alloy steel: No abnormal chipping

Interrupted turning at 180 m/min and 0.2 mm/rev completed with no abnormal edge damage and lower wear than the competitor reference grade.

ResultNo abnormal chipping

Cutting conditions

KBN7030 — cutting conditions
GradeKBN7030
Insert modelCNGA120408
Workpiece materialSCM440H (42CrMoH) alloy steel (HRC50)
Part / featureShaft — outer diameter
OperationInterrupted turning
Cutting speed vc180 m/min
Feed f0.2 mm/rev
Depth of cut ap0.1 mm
CoolantDry
Data sourceInternal cutting test
Case 06 — workpiece and operation illustration (SCM440H (42CrMoH) alloy steel)
Workpiece / operation illustration — case 06

Result and comparison basis

Interrupted turning at 180 m/min and 0.2 mm/rev completed with no abnormal edge damage and lower wear than the competitor reference grade.

Comparison basis: One competitor reference grade.

Comparative data from Koves internal cutting tests and customer field applications. Competitor grades are anonymized as reference grades. Results depend on workpiece, machine and setup; validate on your own production before adopting parameters.

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