HSS Twist Drill

A twist drill is a tool that drills a circular hole in a workpiece through rotational cutting relative to a fixed axis. It is named because its chip flute is spiral-shaped and looks like a twist. Spiral grooves can have 2, 3 or more grooves, but 2 grooves are the most common. Twist drills can be clamped on manual or electric handheld drilling tools or used on drill presses, milling machines, lathes and even machining centers. Drill bit materials are generally high-speed tool steel or carbide.

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