A drill bushing, also known as a jig bushing,[1] is a tool used in metalworking jigs to guide cutting tools, most commonly drill bits. Other tools that are commonly used in a drill bushing include counterbores, countersinks, and reamers. They are designed to guide, position, and support the cutting tool.[2]
In the USA, Customary sized bushings are standardized via ASME B94.33 and metric bushings are standardized via ASME B94.33.1.[3][4] There are over 50,000 standard configurations of customary sized bushings.[2]
^Colvin & Haas 1922, p. 44.
^ abHenriksen 1973, p. 154.
^Henriksen 1973, p. 155.
^http://catalog.asme.org/Codes/PrintBook/B94331_1998_Jig_Bushings.cfm[permanent dead link]
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