It is an accessory for the rotary table, the centering system allows centering a part on the vertical axis of the rotating table; mounting a centering chuck to clamp the workpiece, by acting on the three level adjustments placed at 120° it is possible to adjust the perpendicularity of the vertical axis. With the two 90° regulation knobs it is possible to center the workpiece axis and align it to the rotation axis. Built in hardened steel, it is fixed to the rotary table thanks to the special fixing holes.