Power-operated lathe chuck - has coupling body coupled to thrust washer via radial driving dog allowing sliding movement

摘要

The power-operated chuck secures work or tools to a hollow lathe spindle, in which a clamping bar (19) slides axially, having a coupling (21) to a central axial clamping member (20). Between the spindle and the chuck is a clamping head (2), with a body (2.1) fixed to the spindle and through which the bar passes. Adjustable locking members (6) secure the chuck, and are actuated by a thrust washer (12) rotating in the head body on the spindle axis (3). The locking members engage in mountings (7) in the chuck, to pull it centrally against the clamping head. The coupling has a body (22) turning but not sliding on the bar, and turned between coupling and uncoupling positions. It is coupled to the washer via a driving dog (30) extending radially through an opening in the clamping-head body, so that the two rotate together and can slide axially in relation to each other. The angular interval between the engaged and free positions of the washer is the same as that for the coupling body. USE/ADVANTAGE - On manual operation of the washer, the clamping member and bar engage together.