Patent ID: 7347807

Claim:
A machine tool which comprises at least one working spindle with a tool-holding fixture for tool holders carrying tools, and a tool changer with a gripper for the tool holder in order to transfer the tool holder between a magazine position, which is spaced apart from the tool-holding fixture, and a working position in the tool-holding fixture, there being provided in the working spindle a clamping system with a clamping apparatus by means of which a tool holder inserted into the tool-holding fixture is fixed, wherein the clamping system additionally comprises a retaining apparatus for positively holding a tool holder situated in the tool-holding fixture, wherein the clamping system comprises a mandrel, which, by means of a stroke in the direction of a rotational axis of the at least one spindle, actuates both the clamping apparatus and the retaining apparatus, and wherein the retaining apparatus is configured so as to be able to provide the positive holding of the tool holder when actuated by the mandrel before the mandrel actuates the fixing of the tool holder by the clamping apparatus.