Device for twisting rope-shaped material with changing twist direction

A device for twisting rope-shaped material, with changing twist direction (SZ), comprising a rotor that rotates about a rotor axis, with two chain drives on opposite sides of the rotor axis, each chain drive forming a corresponding endless closed path, with collet chucks that are attached to the chain drives, that grip the rope-shaped material along a prescribed pathway being part of each endless closed path and that are guided by a corresponding pressure rail, wherein the collet chucks release the rope-shaped material outside of the prescribed pathway being part of each endless closed path and wherein, outside of the prescribed pathway of the corresponding pressure rail, the collet chucks pass through a means for forcing the collet chucks along the corresponding endless closed path, wherein the forced guidance means comprises a profile rail, into which a supporting roller of each collet chuck fits for forced guidance by the profile rail and wherein each collet chuck comprises an outer carriage part and an inner sled part that is movable with respect to the outer carriage part, and wherein the supporting roller is connected to the sled part.