Patent attributes
A chuck has an attachment device for attaching the chuck to a machine spindle and a collet with clamping jaws defining an insertion opening at an end of the chuck opposite the attachment device. A sliding sleeve surrounds the clamping jaws and is axially moveable into a clamping position for clamping a machining tool inserted into the insertion opening and into a release position for releasing the tool. Between an inner circumference of the sliding sleeve and an outer circumference of the clamping jaws a contact path conically tapering in an axial direction and counter pressure members that engage positively the contact path are provided. The contact path is positioned at a slant relative to the axial longitudinal center of the collet. The slant angle is so small that under expected operating forces a self-locking action between contact path and counter pressure members is maintained at all times.
