| 摘要 |
A machine vise having a first jaw with a flat, inwardly disposed inner face, a second jaw with a flat, inwardly disposed inner face, opposing the inner face of the first jaw, a jaw plate carried by each jaw and including a block-like body with a flat face in bearing engagement with the inner face of the jaw and flat, inwardly disposed work-engaging surface, fasteners securing the body on the jaw, one or both of said jaws includes a vertically adjustable steady rest comprising an elongate, work-engaging bar adjacent to and extending laterally of the work-engaging surface, an elongate vertical through opening with opposing vertical sides in the body and opening at the face and work-engaging surface, a pair of elongate vertical wedges at the sides of the opening and having inwardly convergent opposing guide surfaces, a block fixed to the bar and having inwardly convergent faces slidably engaging the wedges, a retainer for the block and the wedges and an elongate vertical jack screw rotatably carried by the body and threadedly engaged through the block.
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