Axis – refers to a centerline running down the middle of the drill bit longitudinally from the point of the drill bit to the end of the body.Below is a summary of some of the key terminology relating to drill bits. Drill Bit TerminologyĪmerican National Standard B94.11M-1993 covers the relevant information relating to drill bits, including sizes, tolerances, nomenclature, and definitions. This article will present information on drill bits and the common materials from which they are manufactured to assist in the selection process for a particular application. It is important to match the material of the bit to the material of the workpiece to produce the best results. Not all twist bits will work on all applications. One major aspect of drill bit selection is the material makeup of the drill bit itself. They can drill into metals, solid wood furniture, porcelain, and even glass, and with a variety of different drill bits available, one can find an appropriate bit for almost any situation. The cutting tool used for drilling is called a drill bit, twist drill, or sometimes just a drill, but the latter may also refer to the entire tool as opposed to just the cutting bit itself.ĭrill bits are some of the most common and versatile parts of any machine shop or home tool shed. Image credit: Tereshchenko Dmitry/Shutterstockĭrilling is a process that is used to create a cylindrical hole or bore in a solid piece of material, often as a precursor to tapping or to prepare the material for insertion of a fastener such as a bolt or a screw.
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