Patent ID: 6511077
Filing Date: 2003-01-28
Classification: B23B,Y10T

Abstract:
A clamping chuck for clamping tools by shrinkage, comprising a chuck body having a longitudinal portion with a receptacle open at one end for insertion and receiving a tool to be clamped with a tool shaft, said chuck body at an open end of said receptacle having an end-side abutment surface for the insertable tool so that during insertion a rear-side shoulder of the tool axially abuts against said abutment surface; wherein said longitudinal portion of said chuck body having an end portion with a truncated cone surface which narrows forwardly toward said abutment surface of said chuck body and supporting a ring element, said ring element being axially supportable against said chuck body in one axial direction and being provided with an abutment surface, said abutment surface of said ring element being located forwardly at an end which is axially adjoining said abutment surface of said chuck body so as to be associated with the shoulder of the tool, for axial clamping of the inserted tool by means of said ring element with respect to said chuck body, wherein said ring element is formed so that during heating of said ring element it expands radially more than said longitudinal portion of said chuck body, and is movable along said truncated cone surface of said end portion of said chuck body axially rearwardly and with said abutment surface of said ring element away from said abutment surface of said chuck body for an axial abutment of an inserted tool.