Abstract: A safety belt retractor mechanism has a housing and a spool rotatably mounted in the housing. A safety belt is wound onto the spool in a retracted position. A locking mechanism locks the spool in order to prevent further rotation of the spool when an accident occurs. A load-limiting device enables belt pull-out from the spool to a limited extent after activation of the locking mechanism. The load limiting device has a torsion bar having a first and a second end. The torsion bar is connected with the first end to the spool and with the second end to the locking mechanism. A rotation-limiting device for limiting an angle of rotation of the spool relative to the locking mechanism is provided. The locking mechanism has a locking head having a locking element. The locking head is connected to the torsion bar and thereby connects the spool to the locking mechanism. The rotation-limiting device is located between the locking head and an end face of the spool facing the locking head.