Patent ID: 7252467
Filing Date: 2007-08-07
Classification: B23B,B23Q,Y10T

Abstract:
1. A collet chuck configured to connect to a standard milling machine spindle having an inside tapered peripheral surface which terminates adjacent a mounting end of the spindle and a drawbar operably disposed in the spindle, said collet chuck including: a centering sleeve having a tapered outer peripheral surface for contact with the inside peripheral tapered surface of the spindle and has an outer end disposed adjacent the mounting end of the spindle; a chuck body having a base with an outer end; means for mounting said base to the mounting end of the spindle in a manner which prevents axial movement of said chuck body, yet enables axial movement of the drawbar when said base is so mounted, wherein the spindle is characterized to include a plurality of threaded apertures in the spindle mounting end and said mounting means includes a first plurality of apertures formed in said outer end of said base extending therethrough which when said base outer end is disposed adjacent the mounting end of the spindle can be aligned with said plurality of threaded apertures in the spindle mounting end, said mounting means further including a first plurality of screws for threadably connecting said base outer end to the mounting end of the spindle through said apertures when so disposed and means for biasing operably disposed between said outer end of said centering sleeve and a portion of a back side of said base in a manner such that said biasing means exerts a force on said back side prior to a direct connection of said base to the mounting end thereby providing for variances in connection of said base to the mounting end of the spindle and assuring concentricity is maintained when so connected, wherein an outer peripheral portion of said outer end of said centering sleeve contacts an inner surface of said chuck body to provide a contact point for alignment of said chuck body with respect to the spindle.