Taper shank twist drill is the most widely used tool for hole machining, usually with a diameter of 0.25 to 80 millimeters. It is mainly composed of working parts and shank parts. The working part has two spiral grooves, shaped like a twist, hence its name. Unlike the straight shank twist drill, the taper shank twist drill part has taper. Different specifications of twist drill have different Morse taper.
1. Manufactured to DIN338, DIN340, DIN1897
2. High quality HSS steel, 4341/9341/M2/M35
3. Roll forged, full ground
4. Point angle: 118°or 135°
The center drill is used for machining the center hole on the end face of shaft and other parts.