A precision work holding chuck which centres finished round stock automatically when tightened.

It has flexible sides that allow the collet to be compressed slightly and secured around a tool or workpiece. The collet has a similar function to a chuck, but can accommodate only a narrow size range.

Typically provides greater gripping force and precision than a chuck as the jaws of the collet are applied around the complete circumference apart from thin slits between the jaws.

See also: Chuck.

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Subjects: Mechanical Engineering Tools