NTK Cutting Tools

An extremely tough material and CVD coating combine to achieve excellent fracture and wear resistance

Achieve long tool life even at a low cutting speed (Vc = 300m/min 980 SFM ) due to the CVD coating
Features
  • The combination of an extremely tough grade with a CVD coating achieves excellent fracture resistance and wear resistance
  • Lighter edge preparations reduce tool pressure
  • Excellent for finishing operations
Tooling application
Ductile / Gray cast iron
Turning / Milling
Grade map
↑High





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

High→

Grade characteristics
Gray cast iron rough turning application
Gray cast iron milling application
- - - Scroll the table - - -
ISO Work material Coolant Grade vc (m/min) (SFM) ap (mm) (inch) f (mm/rev) (IPR)
Cast Iron
Rough Turning
DRY SP9 400 – 900 1300 – 3000 0.5 – 3.5 .020 – .140 0.3 – 0.6 .012 – .024
Ductile
Rough Turning
WET 300 – 600 1000 – 2000 0.5 – 3.0 .020 – .120 0.15 – 0.4 .006 – .016
Differential case
Material :
Ductile cast iron
Workpiece condition :
with scale
Cutting speed :
450m/min (SP9) 1500 SFM (SP9)
200m/min (CVD coated carbide) 670 SFM (CVD coated carbide)
Feed :
0.35 mm/rev .0138 IPR
DOC :
1.5 mm .0591 inch
Coolant :
DRY
SP9
C/T 30 seconds / part
Competitor’s CVD coated carbide
C/T 60 seconds / part

SP9 machined at a higher speed than the competitor’s CVD coated carbide and reduced cutting time by 50%.

Auto parts
Material :
Ductile cast iron
Workpiece condition :
with scale
Cutting speed :
600 m/min 2000 SFM
Feed :
0.10mm/t .0039 IPT
Feed :
1,800 mm/min 71 IPM
DOC :
2.0mm/rev .0787 IPR ×3PASS
Coolant :
DRY
SP9
1,300 pcs/ corner
Competitor’s silicon nitride ceramic
800 pcs/ corner

SP9 achieved 1.6 X higher tool life than the competitor’s ceramic.

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