A clamping fixture for clamping a component, in particular a workpiece or tool, having a number of clamping jaws, distributed along a periphery, which are connected by appropriate elastic flexural webs to a main body, wherein the clamping jaws are adjustable by an axially movable actuating device in a radial direction from a release position into a holding position, which clamping fixture is characterized in that the flexural webs, in their release position, are inclined in relation to an axially parallel direction radially in a direction of their respective holding positions.

A clamping ram has a shaft with a longitudinal axis, a first end and a second end. At the second end, two arms are arranged which extend in the longitudinal direction and are mutually spaced by a gap. Each of the arms has an inner surface and an outer surface. At a free end of the arms, a radial thickening is provided on each outer surface. Between the two arms, a wedge plate is arranged so as to be movable in the longitudinal direction. In a retracted position of the wedge plate, the arms are in a compressed state and, in an advanced position of the wedge plate, the arms are in a spread state. Each of the two radial thickenings has a contact surface which, in the spread state, are each part of an imaginary surface that is rotationally symmetrical about the longitudinal axis.