Dormer G57012.4 Series G570 HSS-E 90° Countersink, AlTiCN, 12.4mm x 2.8mm x 56mm

Manufactured from a Cobalt-based HSS (M42), a premium grade high speed tool steel, heat treated to surpass the hardness of other HSS materials. The increased cobalt content helps retain hardness at elevated temperatures. This increased hot hardness makes the material especially suited for machining stainless steels and temperature resistant alloys. It also gives the material increased wear resistance needed for machining in highly abrasive cutting applications. M42 is also a very tough grade and can therefore cope with the most aggressive applications in most materials. The Aluminium Titanium Carbo-Nitride (AlTiCN) multilayer coating has a hardness of 3700HV which surpasses many other nitride based coatings available today. The high hardness of the coating in combination with its high elasticity, low friction and high oxidation resistance enhances the performance of cutting tools, especially for machining stainless steels and nickelbased high temperature alloys. The coating is also wel