Compensating clamping chuck having a housing, in which a drive unit with a cable guide which can be moved in the direction of a clamping axis is arranged and two pairs of diametrically opposed base jaws (7a, c; 7b, d) are arranged, wherein the base jaws (7a-d) are guided in the housing so as to be able to be moved substantially perpendicularly to the clamping axis, preferably radially, and the drive unit is configured to convert the movement of the cable guide into the movement of the base jaws (7a-d), wherein the drive unit has two pairs of diametrically opposed sliding members (17a, c; 17b, d), wherein each sliding member (17a-d) is coupled to a base jaw (7a-d) in order to transmit force to the base jaw (7a-d), wherein the sliding members (17a-d) are coupled to the cable guide by means of a compensation element, wherein the compensation element is configured during a rotation-free movement to bring about a synchronous movement of the two sliding member pairs (17a, c; 17b, d), characterised in that the compensation element can be rotated about the clamping axis relative to the cable guide and is further configured during a rotational movement relative to the cable guide to bring about a relative movement of the second sliding member pair (17b, d) relative to the first sliding member pair (17a, c), wherein the compensation element and the sliding members (17a-d) are coupled by means of sliding faces which are arranged at the circumference and which extend in a helical manner about the clamping axis and which are formed on the compensation element and/or on the sliding members, and wherein the sliding faces are in the form of helical recesses on the compensation element or the sliding members (17a-d); and/or wherein the sliding faces are in the form of helical projections on the compensation element or the sliding members. a housing, in which a drive unit with a cable guide which can be moved in the direction of a clamping axis is arranged and two pairs of diametrically opposed base jaws (7a, c; 7b, d) are arranged, wherein the base jaws (7a-d) are guided in the housing so as to be able to be moved substantially perpendicularly to the clamping axis, preferably radially, and the drive unit is configured to convert the movement of the cable guide into the movement of the base jaws (7a-d), wherein the drive unit has two pairs of diametrically opposed sliding members (17a, c; 17b, d), wherein each sliding member (17a-d) is coupled to a base jaw (7a-d) in order to transmit force to the base jaw (7a-d), wherein the sliding members (17a-d) are coupled to the cable guide by means of a compensation element, wherein the compensation element is configured during a rotation-free movement to bring about a synchronous movement of the two sliding member pairs (17a, c; 17b, d), characterised in that the compensation element can be rotated about the clamping axis relative to the cable guide and is further configured during a rotational movement relative to the cable guide to bring about a relative movement of the second sliding member pair (17b, d) relative to the first sliding member pair (17a, c), wherein the compensation element and the sliding members (17a-d) are coupled by means of sliding faces which are arranged at the circumference and which extend in a helical manner about the clamping axis and which are formed on the compensation element and/or on the sliding members, and wherein the sliding faces are in the form of helical recesses on the compensation element or the sliding members (17a-d); and/or wherein the sliding faces are in the form of helical projections on the compensation element or the sliding members.