NTK Cutting Tools

Ceramic grade best for hardened materials

Excellent performance by increasing the hardness and strength of the insert base material. Suitable for hardened materials in the range of HRC 55-70
Features
  • Excellent wear resistance to machine hardened materials
  • Best for finishing hardened material applications from 55-70 HRC
  • The gold coating makes edge wear easily detectable
Tool application
  • Continuous machining of hardened materials
Grade map
↑High




SPEED
HC4,ZC4
450 HC7,ZC7
HC2,HC5
CONTINOUS LIGHT-INTERRUPT
FEED

High→

Grade characteristics
Harden material - Finishing
- - - Scroll the table - - -
ISO Work material Coolant Grade vc (m/min) (SFM) ap (mm) (inch) f (mm/rev) (IPR)
Hard Turning Finishing
Continous cutting
DRY/WET HC4 40 – 200 130 – 660 0.1 – 0.7 .004 – .030 0.07 – 0.2 .003 – .008
Mill Roll Rough-Finish Turning(CPM) DRY ZC4 120 – 150 400 – 500 0.6 – 2.0 .024 – .080 0.1 – 0.3 .004 – .012
Gear machining
Material :
Carburized and hardened steel
(HRC 63)
Cutting speed :
121 m/min 397 SFM
Feed :
0.03 – 0.04 mm/rev .001 – .002 IPR
DOC :
0.15 mm .006 inch
Coolant :
DRY
ZC4
60 pcs / corner
Competitor’s black ceramic
30 pcs / corner

ZC4 has superior wear resistance and twice the tool life extension compared to competitors’ tool.

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