Patent ID: 8517390

Claim:
Chuck for centering and clamping a workpiece in a balancing machine comprising a centering clamping member with a centering portion having a variable diameter, a radially extending clamping surface, which is adjacent to the centering clamping member, a movable clamping element for axially pressing the workpiece against the clamping surface, a first force-exerting element via which the centering clamping member can be moved into a clamping position, a second force-exerting element via which the clamping element can be loaded with a first force, a third force-exerting element, via which the clamping element can be loaded with a second force, and an axially movable actuating device by which the centering clamping member and the clamping element can be moved into a release position against the force of the first and third force-exerting elements.