SP9

Roughing to finishing of ductile cast iron & gray cast iron｜ Coated Silicon Nitride Ceramic

Covers roughing to finishing operations

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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

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

Ductile / Gray cast iron
Turning / Milling

Cutting conditions

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Grade	Material	Operation type	Machining	Cutting speed (m/min) Cutting speed (SFM)	Feed(mm/rev) Feed(IPR / IPT)	DOC(mm) DOC(inch)	Coolant
SP9	Gray cast iron	Turning	Turning Roughing ~ Finishing	350 – 800 1200 – 2700	0.3 – 0.6 .012 – .024	-3.5 – .140	DRY
	Ductile cast iron	Turning	Turning Roughing ~ Finishing	250 – 550 800 – 1800	0.15 – 0.4 .006 – .016	-3.0 – .120	DRY
	Gray cast iron	Milling	Milling Roughing ~ Semi-Finishing	350 – 700 1200 – 2500	0.07 – 0.25 .003 – .010	-6.0 – .240	DRY
	Ductile cast iron	Milling	Milling Roughing ~ Semi-Finishing	400 – 800 1300 – 2700	0.07 – 0.25 .003 – .010	-6.0 – .240	DRY

Case study

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.

April 23, 2025

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