Internal clamping means for clamping a plurality of workpieces

An internal clamping means for clamping a plurality of workpieces, with the following features:

• a. the internal clamping means has a base with a clamping mandrel which is oriented in a main extent direction and has a guide face, and
• b. the internal clamping means has at least two clamping sleeves that are displaceable in the main extent direction and have a clamping portion which is expandable by means of displacement, and the outside of which has a clamping face for a respective one of the workpieces, and
• c. the at least two clamping sleeves are pushed onto the guide face of the clamping mandrel from the direction of a distal end of the clamping mandrel, and
• d. the internal clamping means has at least three piston chambers which act between the base and the at least two clamping sleeves and between the clamping sleeves.