| 摘要 |
<p>The invention relates to a rotatable chuck for clamping a shank portion (5) of a rotatably operating machining tool (6), comprising a rotatable chuck body (1) provided with a cylindrical bore (4) being concentric with a rotation axis (2) of the rotatable chuck body, wherein circumferential surfaces of a clamping portion (7) of the bore are adapted to apply a clamping force around the circumference of the shank portion of the tool when it is mounted in the chuck to fixate the tool in a well-defined position in the chuck. The chuck is also provided with auxiliary pull out preventing means, for preventing inadvertent pull out of the tool in the axial direction of the bore during machining operation, as well as auxiliary rotary preventing means for preventing inadvertent rotation in at least one direction in relation to the chuck during machining operation. The auxiliary pull out and rotary preventing means comprises an attachment member (12) being positionable in an inner portion of the bore (4) and being attachable to the shank portion (5) to be clamped,such that the tool (6) and the attachment member will be prevented from being pulled apart in the axial direction as well as be prevented from being rotated in at least one direction in relation to each other, wherein the rotatable chuck body (1) also comprises an axial pull out preventing means as well as a rotary preventing means in at least one direction, arranged to engage with the attachment member.</p> |
