A tool shank (18;38;138) is described that comprises a spindle attachment portion (20) that is removably attachable to the rotatable spindle (12) of a machine tool (10), a shank body portion (21;121) which extends beyond the end of the spindle when the tool shank (18;38;138) is attached to the spindle...http://www.google.es/patents/US7594337?utm_source=gb-gplus-sharePatente US7594337 - Power and/or signal paths for a machine tool accessory
Power and/or signal paths for a machine tool accessory
