| 摘要 |
A drill chuck has a chuck body having a forwardly open large-diameter threaded bore centered on an axis and a rearwardly open bore also centered on the axis and of small diameter. A power-unit spindle end is threaded into the small-diameter bore and projects axially forward into the large-diameter bore. A sleeve assembly axially fixed but rotatable on the chuck body is formed centered on the axis with a plurality of axially extending, angularly spaced, and forwardly open angled guides slidably receiving jaws. A coupling body has a large-diameter rear end threaded into the forwardly open large-diameter bore of the chuck body and a front end fitted to and angularly coupled to the jaws so that rotation of the sleeve assembly, jaws, and coupling body relative to the chuck body axially shifts the jaws.
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