Device for winding a safety belt onto a shaft, with a principle mainspring (7), which prestresses the shaft (4) in the winding direction (a) of the safety belt (2); a ratchet wheel (12) that rotates relative to the shaft (4); a blocking device (15) for blocking the rotational movement of the ratchet wheel (12) in the winding direction (a); a balance spring (20) which transmits to the shaft (4) a prestressing force that opposes the prestressing force of the principle mainspring (7) when the ratchet wheel (12) is blocked; and a free-wheel clutch that exhibits a blocking ring (34) with teeth (35, 39) and a blocking element that interacts with said teeth (35, 39). The blocking element has two ends having an angular spacing which differs from a whole-number multiple of the divisional spacing of the teeth (35, 39).