Result3× part count
Cutting conditions
| Grade | KBCN20N |
|---|---|
| Insert model | CNGA120408 |
| Workpiece material | 20MnCr5 case-hardening steel (HRC60) |
| Part / feature | Gear — bore |
| Operation | Bore / internal turning |
| Cutting speed vc | 200 m/min |
| Feed f | 0.08 mm/rev |
| Depth of cut ap | 0.15 mm |
| Coolant | Dry |
| Data source | Field application |
Result and comparison basis
Three times the part count of the previous grade while surface roughness stayed within specification — the edge could still be used.
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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