Abstract: To enable the printing cylinder of a rotary press, which carries printing plates, to move to and from operative proximity to an impression cylinder rotatable on a fixed axis, the respective printing cylinder bearings are eccentrically mounted on large diameter disc-like bearing carriers, each rotatable in a hole in a rigid side frame member, said holes being coaxial. Each of the bearings for an anilox cylinder that transfers ink to the printing cylinder is similarly eccentrically mounted on a small diameter circular bearing carrier rotatable in an eccentric hole in a large diameter bearing carrier. Each bearing carrier has a frustoconical edge surface tapering in one axial direction, and the hole in which it rotates has a matingly tapered edge surface to define a limit of its axial motion in said direction, at which it is confined.