| 摘要 |
A tool chuck (10) having a spring (58) for rotating a collar (13) to cam-lock a bit (11) into the chuck upon insertion of the bit into the chuck. Ball detents (32) and cams (57) serve to lock the bit into the chuck. A second spring (41) serves to eject the bit when so desired. There is a method for automatically locking the bit into the chuck, and there is indicia on the chuck for directing the user as to effecting the release of the bit.
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