| 摘要 |
A self-centering drill chuck for use in hammer drills or like impact- and torque-transmitting machines. The shank of the boring or drilling tool is received between and is clamped by three jaws which are slidably guided in the pull-on nut or in the adapter of the chuck. A dished spring is inserted between the jaws and the adapter or nut to undergo deformation when the nut is rotated by a chuck key to thereby prevent a relaxation of the clamping force between the shank of the inserted tool and the jaws while the chuck rotates and receives axially oriented impacts. |
