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Case 13 · Field test at customer site

KBCN9020 (coated) / KBN9020 — Continuous turning (OD) of 19CrNi5 case-hardening steel: Coated: 80 pcs vs 35–45 uncoated

Coated KBCN9020 reached 75–80 parts versus 35–45 for the uncoated grade. For strongly interrupted machining of steel above 60 HRC, the coated grade is recommended.

ResultCoated: 80 pcs vs 35–45 uncoated

Cutting conditions

KBCN9020 (coated) / KBN9020 — cutting conditions
GradeKBCN9020 (coated) / KBN9020
Insert modelTNGA160408
Workpiece material19CrNi5 case-hardening steel (HRC)
Part / featureShaft — outer diameter
OperationContinuous turning (OD)
Cutting speed vc126 m/min
Feed f0.1 mm/rev
Depth of cut ap0.1 mm
CoolantDry
Data sourceField test at customer site
Case 13 — workpiece and operation illustration (19CrNi5 case-hardening steel)
Workpiece / operation illustration — case 13

Result and comparison basis

Coated KBCN9020 reached 75–80 parts versus 35–45 for the uncoated grade. For strongly interrupted machining of steel above 60 HRC, the coated grade is recommended.

Comparison basis: Uncoated KBN9020 as the baseline.

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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