NTK Cutting Tools

Machine gray cast iron at cutting speed up to Vc= ~ 1200m/min ~ 3900 SFM

Outstanding notch wear and thermal shock resistance
Features
  • Excellent wear resistance ensures long tool life at high cutting speed
  • High thermal shock resistance in wet turning and milling applications
Tooling application
  • Rough Turning and Milling
  • Compatible with dry and wet machining
Grade map
↑High





SPEED
SX6
HC2 SP9
SX9
HC1,HW2 HC6
CP1
FINISH SEMI-FINISH  ROUGH
FEED

High→

Grade characteristics
Why is silicon nitride ceramic resistant to chipping?

The main component is silicon nitride(Si3N4), which differs from alumina-based materials in that its particles are needle-like.
The intertwining of the needle-like particles greatly suppresses the progression of cracks caused by impact during cutting and prevents chipping.

Gray cast iron roughing process
- - - Scroll the table - - -
ISOMaterialCoolantGradevc (m/min) (SFM) ap (mm) (inch) f (mm/rev) (IPR)
Cast Iron
Rough Turning
DRY/WETSX6 500 – 1200 1600 – 4000 0.5 – 3.5 .020 – .140 0.3 – 0.6 .012 – .024
Brake disc
Material :
FC150
Workpiece
condition :
as-cast skin
Cutting speed :
1,100 m/min 3600 SFM
Feed :
0.5 mm/rev 0.02 IPR
DOC :
2.0〜3.0 mm .079 〜 .118 inch
Coolant :
WET
SX6
75 pcs / corner
Competitor’s silicon nitride
50 pcs / corner

SX6 achieved 1.5 times longer tool life compared to competitor’s silicon nitride

Milling Application
Material :
FC270
Cutting speed :
800 m/min (SX6) 2600 SFM (SX6)
140 m/min (Competitor's carbide) 470 SFM (Competitor's carbide)
Feed :
0.06 mm/t (SX6) .0024″ IPT (SX6)
0.20 mm/t (Competitor's carbide) .0079″ IPT (Competitor's carbide)
Table Feed :
1,400 mm/min (SX6) 55 IPM (SX6)
560 mm/min (Competitor's carbide) 22 IPM (Competitor's carbide)
DOC :
1.5 mm .060
Coolant :
DRY
SX6
360 pcs / corner
Competitor’s carbide inserts
260 pcs / corner

High-speed milling with ceramic significantly reduced cycle time compared to the current carbide inserts. (Single pass process went from 40 min. down to 15min.)
SX6 achieved 1.4 times more tool life.
Tooling costs are reduced by utilizing negative inserts, increasing the number of corners.

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