Patent ID: 7500811

Claim:
Collet chuck for retaining a cutting tool, which is subjected to a rotational movement about its axis and an axial movement, wherein the collet chuck is intended to be carried by a chuck holder, which is mounted on the axis of a machine tool, and wherein said collet chuck comprises: an outer body with a bore, whose outer form corresponds to the receiving form of the chuck holder; and a sleeve, which is kinematically rotationally connected with the outer body and wherein said sleeve is axially movable in the interior of the bore and comprises: an axially movable quick-change sleeve ( 9 ) to retain the cutting tool; means for limiting the axial movement of the sleeve in the interior of the bore; and an elastically deformable reset means ( 7 ) for biasing the sleeve toward a normal position for the sleeve; wherein said axially movable quick-change sleeve ( 9 ) is guided in the collet chuck or in the sleeve, and wherein said quick-change sleeve is implemented such that it is stayed via a spring ( 10 ) axially with respect to the sleeve ( 6 ) and a clamping body ( 11 , 23 ); wherein said bore of the outer body is closed by means of a plate ( 33 ) which has at least a polygonal nut facing and which cooperates with at least one polygonal insertion facing of the sleeve, in order to connect the outer body and the sleeve kinematically in rotation and also ensure the axial guidance of said sleeve in the interior of said body.