| 摘要 |
A self-centering chuck is provided for accurately fixing the position of workpieces on tables. The chuck has a basic body with guide grooves, a threaded spindle with right-handed and left-handed external threads and a centrally arranged groove, two slides screwed onto an external thread each with a clamping jaw each in the head area and with sliding blocks in the foot area. The slides are guided axially in the guide grooves and on the threaded spindle. The threaded spindle is centered in a central piece and can be fixed and locked on the basic body and on the central piece by fastening means guided in the groove. The clamping jaws arranged on the head side on the slides have clamping surfaces on both sides and can be used on both sides. The slides can be screwed on both sides onto left-handed and right-handed external threads of the threaded spindle.
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