| 摘要 |
The invention relates to an apparatus for holding a workpiece ( 2 ) or tool having a tapered collar ( 1 ) or the like and having a pull-back rod ( 4 ) axially shiftable in a body ( 3 ) for actuating a chuck head ( 6 ) cooperating with jaws ( 5 ). The axial position of the pull-back rod ( 4 ) is maintained in a holding position without utilizing the force of a tension spring by a self-locking mechanism.
|
