Patent ID: 6260855
Filing Date: 2001-07-17
Classification: B23B,Y10T

Abstract:
An apparatus for holding a workpiece in a predetermined position in a machine tool, said apparatus having an axis of rotation and comprising:a chuck body having an outer surface, an inner bore, a first end and a second end with said second end being insertable into a tapered opening of a spindle of said machine tool, said chuck body including stop means projecting radially from said outer surface for abutment against a face of said spindle for stopping inward movement of said apparatus upon achieving a predetermined final position in said spindle, a portion of said outer surface adjacent said stop means and extending toward said second end being inwardly tapered by an amount whereby the taper of said outer surface is generally equal to the taper of said spindle opening;a connector attached to said second end of said chuck body, said connector having a first end insertable into the second end of said chuck body and said connector having a second end comprising a plurality of spaced-apart lugs extending radially outward;a collet located in said inner bore at said first end,a contractor located in said inner bore, said contractor being axially movable and comprising a first end having one or more angled surfaces in contact with respective angled surfaces on said collet whereby axial movement of said contractor expands or contracts said collet, said contractor having a second end comprising a plurality of spaced-apart lugs extending radially outward.