Abstract: A winch for winding and unwinding of a tension line, with a winding drum that is rotational around its central axis so that the tension line is windable and unwindable in windings running around the winding drum, and with a rotating actuator for driving a rotation of the winding drum, wherein the winding drum is arranged in a longitudinally movable manner along its central axis with respect to a base of the winch. It is a threaded rod extending in the central axis and having an external thread, wherein the winding drum is arranged rotationally around the threaded rod by means of a counter-thread that engages in the external thread.