Patent ID: 7469484

Claim:
A device for the concentric chucking of rotatingly drivable parts, comprising: a housing comprising a bore for receiving a part; a rotary drive for driving said housing about a rotary axis; a first set of at least three clamping units arranged radially within said housing for clamping said part; a second set of at least three clamping units arranged radially within said housing for clamping said part, said first set being axially offset from said second set; actuators provided on at least two of said clamping units of said first set and on at least two of said clamping units of said second set, said actuators being configured for radially adjusting said part; a measuring device comprising two measuring pick-ups, arranged axially offset relative to one another for sampling said part when said housing is driven about said rotary axis to generate output data indicative for deviations of said part from concentricity with respect to said rotary axis; a computing device coupled with said measuring pick-ups for receiving said output data and for computing control data there from, said control data being input to said actuators for automatically controlling said actuators to radially adjust said part to effect concentricity of said part with respect to said rotary axis avoiding couple unbalances and parallel unbalances.