Robert Boschgmbh

Karsten Blaier

Karl Frauhammer

Heinz Schnerring

Manfred Hellbach

The machine tool, especially a hammer drill or chisel, has a rotatable and/or axially movable tool holder ( ) for a tool ( ) having a grooved shaft. The tool holder ( ) includes a base body ( ); two radially movable locking bodies ( ) held in the base body and movable into respective locking positions engaged in two closed grooves ( ) in the tool shaft; a bearing member ( ) movable between a bearing position for holding the locking bodies ( ) in the locking position and a releasing position in which the locking bodies are movable out of the grooves; an operating member ( ) connected with the bearing member ( ) for moving the bearing member ( ) and a resilient plastic guiding member ( ) arranged to guide the locking bodies ( ) radially outward during motion from the locking to unlocking position and to act on the locking bodies ( ) with a radially inwardly directed spring force.

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Munich, Georgia

Karsten Blaier