Patent ID: 8919786

Claim:
A chuck comprising: a chuck body centered on a chuck axis, having an axially forwardly open frustoconically tapered centering hole centered on the chuck axis, and formed with an axially rearwardly open cavity that is opened radially inwardly into the centering hole and closed radially outwardly and with an aperture opening inwardly into the cavity and outwardly to the exterior; a clamping member in the centering hole and having a clamping thread; an angle drive having a threaded ring in the cavity, threadedly engaged with the clamping thread, coaxial to the clamping member, and rotatable in the cavity about the chuck axis, and a drive member rotatable in the cavity about a drive axis not parallel to the chuck axis, fittable axially forwardly into the cavity, and accessible to a drive tool through the aperture; and a plate secured to the chuck body or the threaded ring, fixing the threaded ring axially in the chuck body, and axially rearwardly closing the cavity and retaining the drive member therein, the aperture being centered on the drive axis and of such a cross-sectional size that the drive member cannot fit through it such that the drive member and the threaded ring can only be removed from or installed into the cavity when the plate is not rearwardly closing the cavity.