DM4Difficult-to-cut materials | PVD coated carbide

Excellent heat resistance for finishing

Ideal for difficult materials such as heat resistant alloys and titanium alloys

Eliminates the effects of heat on the insert during high temperature machining
High efficiency and long tool life in high precision finishing of difficult to cut materials


  • A thick TiAlN coating provides heat resistance to extend tool life
  • The combination of heat and wear resistance is ideal for finishing heat resistant alloys and titanium

Tooling application

Difficult to cut materials such as titanium and heat resistant alloys
Finish Turning / Grooving

Grade characteristics

Cutting conditions

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Grade Material Operation type Machining Cutting speed (m/min) Feed(mm/rev) DOC(mm) Coolant
DM4 Difficult to cut materials (heat resistant alloys) Turning Finishing 20 - 50 0.03 - 0.15 0.1 - 1.0 WET
Grooving 0.05 - 0.20 -

Why are Sialon ceramics so effective at high-speed machining of heat resistant alloys?

Silicon nitride (Si3N4) is combined with Aluminum (Al) and oxygen (O) to make SiAlON.
Sialon has needle-shaped particles similar to that of Silicon nitride.
The arrangement of these particles makes the material withstand the impact force during cutting.
The addition of the alumina improves its heat resistance characteristics.
The property advantages makes it perfect for machining heat resistant alloys.

Case study

Case (finishing)
Material :
Cutting speed :
Feed :
Coolant :

110 pcs / corner

Competitor’s PVD coated carbide

90 pcs / corner

Tool lineup

Please check product catalog for tooling lineup