M42 8% Cobalt straight shank twist drill

Description：· Shank Type: Features a straight cylindrical shank
· Point Angle: Commonly ground with a 135° split point
· Coating Options: Available in uncoated forms or with surface treatments like TiN coating

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Nature：生产厂家
Update time：2026-08-18
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Product Category

HSS Twist Drill

HSS Straight shank drill HSS Taper shank drill View all

Detailed introduction

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.