The invention relates to an open-end spinning machine with a plurality of spinnboxes and rotors (2) arranged in them, in which each spinnbox comprises, among other things, a cover (1) arranged on a front side of the particular associated rotor (2). At least one limitation device (7) for limiting the rotor movement in the direction of the longitudinal axis of the rotor onto the cover (1) is provided, which limitation device (7) covers a circular segment of a possible circular contact area between rotor (2) and cover (1).