| 摘要 |
A vice understop comprising an understop body and a relocatable stop connected to the understop body is removably attached with clamping screws to a hard jaw of a machine vise to establish a reference position for a work piece to be machined. A vise block placed against a front surface of the vise understop establishes a vertical reference position for the work piece. A locating pin on the relocatable stop is adapted for a sliding fit into an aperture on the understop body and a curved surface on the relocatable stop contacts a correspondingly curved support shoulder on the understop body. A position of the relocatable stop selected from a plurality of discrete positions on the understop body establishes a horizontal reference position for the work piece. A locating post on a back surface of the understop body enables accurate, repeatable positioning of the vise understop against the hard jaw.
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