Chuck for machine tool, holding rotary cutting tool or workpiece, includes pressure chamber at slight spacing from tool holder when de-pressurized

摘要

The chuck (3) includes at least one pressure chamber (12) spaced from the tool (4) holder (10). In the small local clearances, a zone of deformation is formed, such that when pressure is applied to the pressure chamber, deformation takes place radially toward the holder. The holder has two reference surfaces parallel to the axis of rotation, which intersect at an angle. The pressure chamber includes a deformation zone which works with the two reference surfaces during clamping.