Patent ID: 6481940
Filing Date: 2002-11-19
Classification: B23B,Y10T

Abstract:
A spindle in a machine tool, said spindle having an axis, a receptacle arranged in the axis and provided for receiving a shaft of a tool holder, and a clamping mechanism for axial fixation of the shaft in the receptacle, the clamping mechanism comprising an axially movable clamping arbor with a circumference, at least one segment arranged at said circumference and having at least a first and a second radial operation position, whereby said at least one segment fixes said shaft positively in said receptacle when being in the first radial operation position, first guiding means acting between the clamping arbor and the at least one segment such that upon axial movement of the clamping arbor the at least one segment is radially transferred between said first and second radial operation positions, and second guiding means arranged for holding said at least one segment in a definite way when being in said second radial operation position or in any interposition between said first and second radial operation positions.