Accurate rotary motion is vice

The utility model provides an accurate rotary motion is vice. A processing that is used for accurate dottle pin class part, accurate rotary motion is vice installs on the universal grinding machine external, accurate rotary motion is vice includes first sliding pair, second sliding pair and permanent magnetism circle sucking disc, first sliding pair includes the supporter of the universal grinding machine external headstock, stationary center and one end utensil centre bore, and the centre bore of supporter is held on the stationary center top of the universal grinding machine external headstock, the second sliding pair include the supporter with the cylindrical grinder centre frame, the supporter outer fringe is supported by the universal grinding machine external centre frame, permanent magnetism circle sucking disc with supporter fixed connection. The utility model discloses workpiece setting is convenient during the use, because the clamping of work piece adsorbs on permanent magnetism circle sucking disc