| 摘要 |
A movable jaw assembly of a workpiece holder mounted on a high-precision machining table is disclosed that has a gripping surface that can be rapidly changed without loosening the interfaces between the jaw and the shaft of the assembly or the base of the assembly and the table. The quick-change gripping surface is provided on a moveable jaw assembly having a dovetail-shaped foot and is removably received in a channel on the jaw assembly. A right-circular conical set screw presses an angled surface of the foot against an angled lower side of the channel. The upper side of the channel is cutaway to permit the foot to pivot out of the channel. The jaw is located in the channel by an index groove on the rear surface of the jaw that fits over an index pin in the channel.
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