Apparatus to secure a cylindrical object for laser processing

The device as recited in one of the preceding claims, having a second chuck that includes three second clamping elements, each of which is equipped with a clamping pin that is supported in sliding fashion and is adjustable in a plane extending perpendicular to the clamping axis, where two of the second clamping elements are supported in stationary fashion so that the axis of the clamping pins is oriented radially in relation to the clamping axis and one second clamping element is supported so that it is able to slide in the circumference direction around the clamping axis.

A device for holding a jewelry ring, for machining with a laser beam (L), having at least one chuck that is supported so that it is able to rotate around a rotation axis and that is provided for centrally holding the work piece by means of first clamping elements, which automatically fix the work piece in a central position through the exertion of a spring force exerted on the clamping elements by a spring element thereby pushing the clamping elements radially outward or inward after releasing the clamping elements from a starting position that permits the work piece to be placed on the chuck, wherein the work piece is fixed on the chuck solely through the action of the spring element.