| 摘要 |
A drill chuck of the key or Jacobs type comprising a chuck body guiding a plurality of chuck jaws toward and away from one another with axial displacement of the jaws by a gear ring whose teeth mesh with the Jacobs key. The toothed ring is formed with a groove in which a sleeve into which an inwardly projecting ridge of a sleeve is form-fittingly driven in the assembly of the chuck, the sleeve retaining the ring and another chuck member in axially fixed relation, this other chuck member being provided with an internally threaded bore for mounting upon a drill or other machine tool spindle. Directly opposite the shoulder formed by the groove in the toothed ring, the sleeve is provided with an inwardly open circumferential groove to facilitate plastic deformation of the sleeve into the groove of the ring.
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