Patent ID: 7195431
Filing Date: 2007-03-27
Classification: B23B,Y10S,Y10T

Abstract:
1. Device for clamping a hollow shaft tool or a tool holder provided with a conical hollow shaft in a machine spindle having a rotational axis and provided with a taper bore, for use in a machine tool, with a clamping sleeve that can be axially displaced within the machine spindle, with a tow-bar that can be displaced between a release position and a clamping position and that serves to displace the clamping sleeve, and with a plurality of pincer elements that are assigned to the clamping sleeve and that can be displaced radially due to displacement of the clamping sleeve, where said pincer elements have clamping faces for adjoining a conical inner surface of the conical hollow shaft and for adjoining an opposite surface on the machine spindle, characterized in that the clamping sleeve can be axially displaced relative to the tow-bar and is axially biased in a direction opposite to a direction of the release movement of the tow-bar by a compression spring.