DRAW-TYPE TO STATIONARY-TYPE COLLET ADAPTER

摘要

A collet adapter operates a draw-type collet in an axially stationary mode in a machine spindle that would otherwise operate with a stationary collet. The machine spindle has an axially stationary outer portion including a cap nut and an axially movable sleeve inside the axially stationary portion. The collet adapter includes an adapter body and a restraining apparatus. The adapter body has an inside surface that receives the draw-type collet in sliding engagement. The restraining apparatus is configured to transmit an axial force from the stationary cap nut to a rearward portion of the draw-type collet to restrain axial motion of the draw-type collet. As a result of this axial constraint forward and backward motion of the axially movable sleeve closes and opens the collet respectively through the sliding engagement between the collet and the inside surface of the adapter body.