Cobalt drill

The M42 straight shank twist drill bit is a high-performance cutting tool designed for demanding metal drilling applications. Material & Composition It is manufactured from M42 high-speed steel (HSS), a premium cobalt-alloyed grade containing 8% cobalt (also known as HSS-E). This composition imparts exceptional red hardness (retains cutting edge hardness at high temperatures), high wear resistance, and good toughness. The material typically achieves a hardness of 66-68 HRC on the Rockwell scale. Applications The M42 straight shank twist drill is highly versatile and widely used in CNC machines, precision drilling equipment, bench drills, and heavy-duty hand drills. It is specifically recommended for drilling stainless steel, titanium alloys, cast iron, hardened steels, and other difficult-to-machine materials