Patent ID: 7258350

Claim:
A chuck for receiving a working tool ( 2 ) rotatable about a longitudinal axis (A), the chuck ( 1 ) comprising a receiving sleeve ( 3 ) open, with respect to a coaxial radial dimension (R) thereof, over a circumference thereof, and having a guide surface ( 12 ) extending along the longitudinal axis (A) with a radial dimension (R), and at least three, axially extending, up to a free end surface ( 4 ) of the chuck ( 1 ), entraining grooves ( 5 ) located in front of the guide surface ( 12 ), the entraining grooves ( 5 ) being arranged radially outside of the radial dimension (R) at angles of 0°, 120°, and 240° and each having a central angle (α) amounts maximum to 70° defined with respect to the radial dimension (R); and at least one locking member ( 6 ) radially displaceable over the radial dimension (R) and arranged between two circumferentially adjacent entraining grooves ( 5 ) and diametrically opposite a third entraining groove ( 5 ).