a chuck body for a clamping chuck for clamping a workpiece has a substantially rotationally symmetrically formed basic body , provided on which is a receiving opening , which is formed as a portion of a cone and is formed for receiving a clamping head in such a way as to transmit force . attached to the basic body is a deformation sensor , for example as a strain gauge , which is intended and designed for determining a deformation of the basic body in a circumferential direction . in this way , the condition and state of wear of the clamping chuck can be determined .