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Independent face plate LUD A four-jaw chuck in which the clamping of the workpiece is ensured by an independent movement of the jaws by means of a trapezoidal screw engaged with the jaw. • chuck body - ductile cast iron • 4-jaw chuck • clamping the chuck on the machine spindle • Type M2 through cylindrical mounting with screws from the rear or front mounting • Type A, B, D using an intermediate flange