Collets & Collet Holders

This article gives a basic overview of the function and uses of collets, how to install them in collet holders, and finally their installation in the Haas CNC mill.

Overview

 * A collet is a subtype of chuck that forms a collar around an object to be held and exerts a strong clamping force on the object when it is tightened.
 * Reliable traits of collets include:
 * Fast chucking
 * Self centering
 * Strong clamping
 * Resistance against being jarred loose
 * Precise centering

Types

 * R8 (internally threaded for use in mills)
 * 5C (externally threaded for use in lathes)