Patent ID: 9511423
Filing Date: 2016-12-06
CPC Classification: B23B,Y10T

Claim Text:
1. A collet adapter for adapting a machine spindle to a small draw-type collet, the draw-type collet including a forward portion for receiving a workpiece and a rearward portion extending into the collet adapter, the machine spindle having an axially stationary outer portion including a cap nut and an axially movable sleeve inside the axially stationary outer portion, the collet adapter comprising: an adapter body having an inside surface and an outside surface, the inside surface configured to receive the collet in sliding engagement, the outside surface configured to be received into and to move axially with the moveable sleeve; and a restraining apparatus configured to transmit an axial force from the cap nut to the rearward portion of the draw-type collet to restrain forward axial motion of the draw-type collet whereby forward motion of the adapter body exerts a radially inward force upon the draw-type collet thereby operating the draw-type collet in an axially stationary mode wherein the adapter body has a rear portion sized to fit into the moveable sleeve and a forward portion configured to extend in a forward direction beyond the moveable sleeve to allow a workpiece to be gripped beyond the fixed portion of the machine spindle and wherein the rear portion of the collet adapter has a rear outside diameter, the forward portion of the collet adapter has a forward outside diameter, and the rear outside diameter is greater than the forward outside diameter.