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Case 29 · Field application

KBCN25N — Bore / internal turning of SCr420 case-hardening steel: Better surface finish

Improved machined-surface roughness with stable results at 0.22 mm/rev feed.

ResultBetter surface finish

Cutting conditions

KBCN25N — cutting conditions
GradeKBCN25N
Insert modelCNGA120412
Workpiece materialSCr420 case-hardening steel (HRC60)
Part / featureAutomotive component — bore
OperationBore / internal turning
Cutting speed vc180 m/min
Feed f0.22 mm/rev
Depth of cut ap0.05–0.10 mm
CoolantWet
Data sourceField application
Case 29 — workpiece and operation illustration (SCr420 case-hardening steel)
Workpiece / operation illustration — case 29

Result and comparison basis

Improved machined-surface roughness with stable results at 0.22 mm/rev feed.

Comparison basis: Previously used 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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