Drill geometry has several characteristics:
• The spiral (or rate of twist) in the drill bit controls the rate of chip removal. … See more

General-purpose drill bits can be used in wood, metal, plastic, and most other materials.
The twist drill bit is the type produced in largest quantity today. It comprises a cutting poin… See more

Center drill bits, occasionally known as Slocombe drill bits, are used in metalworking to provide a starting hole for a larger-sized drill bit or to make a conical indentation in the end of a workpiece in which to m… See more

The brad point drill bit (also known as lip and spur drill bit, and dowel drill bit) is a variation of the twist drill bit which is optimized for drilling in wood.
Conventional twist drill bits tend to wander when prese… See more

The diamond masonry mortar bit is a hybrid drill bit, designed to work as a combination router and drill bit. It consists of a steel shell, with the diamonds embedded in metal segments attached to the cutting edge. Thes… See more

Different shapes of shank are used. Some are simply the most appropriate for the chuck used; in other cases particular combinations of shank and chuck give performance advantages, such as allowing higher torq… See more