For clamping and centering of workpieces with internal bore. Material Body Steel, blackened Clamping screw Case-hardened steel, case hardened Assembly The centering clamping mandrel can be machined to the required seating diameter (e.g. by turningmilling). It must be noticed that before machining the centering clamping mandrel, it will be expanded approx. 0.1 mm over the clamping diameter. To machine the mandrel, a nut will be provided. Notes Special types on request.