Fixed pincers of high accuracy

The utility model provides a fixed pincers of high accuracy, include one with the anchor clamps seat of workstation contact, install a holding workpiece's chuck in anchor clamps seat top, still install a roating seat between chuck and anchor clamps seat, the chuck inlays the body and fixes at the roating seat upper surface, the roating seat is fixed on the anchor clamps seat through a pivot, this roating seat upper surface is provided with a recess, the recess central line passes the pivot center, the chuck is inlayed in the recess to utilize the screw fixation, the pivot setting at roating seat center to alternate and fix in the bearing in the central fixed orifices of anchor clamps seat. The utility model discloses behind the clamping work piece, can be rapidly with work piece centring control to roating seat center through adjusting corresponding part to very convenient process out the step apart from the any size in work piece center with the cutter, and the rotation of the whole roating seat of accessible processes the step of work piece difference side, convenient and fast and machining precision are high.