Spade Drill Tip Insert Information
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Rex M-4* or AISI M-4 is a special purpose high speed steel designed to give high wear resistance in tools. Its high vanadium and carbon content provide for superior resistance to cratering and wear in cutting applications involving high speed and light cuts. It is designed to give maximum performance working with abrasive materials exhibiting excellent wear resistance.

CPM Rex T15* or AISI T15 is a super high speed steel made by the Crucible Particle Metallurgy (CPM) process. It is a tungsten type high speed steel containing high vanadium for excellent abrasion resistance, and cobalt for good red hardness. CPM Rex T15 is ideal for cutting difficult to machine materials where high frictional heating is encountered.

CPM Rex 76* or AISI M48 is a super high speed steel made by the Crucible Particle Metallurgy (CPM) process. It has high carbon, vanadium and cobalt for abrasion resistance comparable to T15 and superior red hardness. Its high hardness, fine grain size and uniform carbide distribution make it outstanding for special purpose cutting tools. The best applications are where high red hardness, high abrasion resistance, and good toughness can be used to advantage.

  • (CPM) is a registered trademark name of Crucible Materials Corp.
  • Information provided by permission of Crucible Materials Corp.


C-2 (K20) Carbide is medium fine grain carbide for general purpose machining, Cast Iron high temperature alloys, and Non-Ferrous metals.

C-3 (KO) Carbide is fine grain carbide used for light finishing in Cast Iron and Non-Ferrous metals.

C-5 (P-40) Carbide is medium grain carbide used for rough cutting or drilling of steel and steel castings.

Wear Resistance - Tungsten carbide wears up to 100 times longer than steel in conditions including abrasion, erosion and galling. Wear resistance of tungsten carbide is better than that of wear-resistance tool steels.


Available Coatings

TiN (Titanium Nitride) A general-purpose coating for iron based materials that will give good abrasive and adhesive protection for cutting tools at moderate speeds and feeds.

TiCN (Titanium Carbonitride) A high performance coating for high speed machining that is tougher than TiN and harder for more wear protection and higher speeds and feeds, but should not be used with coolant.

TiALN (Titanium Aluminum Nitride) A high performance layered coating for high speed machining that can be wet, semi-dry or dry. Excellent for cast iron, stainless steel, nickel based and titanium based alloys.

TiALN + (WC/C over TiALN) A composite coating designed primarily for chip evacuation of soft gummy materials, but also can be helpful to reduce friction in the machining of alloys that tend to work harden. Very good resistance to adhesive wear (built up edge).

Also Available are some new TiALN Coatings

TiALN Extreme - for hardened tool and mold steels (Rc 50 and higher) D-2, H-15, M-2, P20 ext.

TiALN Exceed - for super alloys in the medical, nuclear and aerospace industries. Titanium and titanium alloys, high nickel and high chrome alloys, Inconel, Monel, etc.

TiALN Endura - a thicker coating (8 - 10 microns) for rough machining operations on honed cutting edges.

This information is intended for general purposes only. Each application is unique and must be treated on an individual basis.

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