Abstract: A roll device for rolling metal strips comprises a first and a second work roll which define a roll gap therebetween, and a first and a second backup roll. In a common rolling mill stand, at least one work roll is mounted in work roll chocks and the backup rolls are mounted in backup roll chocks. The work roll chocks are designed such that the first and/or the second work roll can each be replaced by a roll arrangement having a work roll with a smaller diameter and at least one additional roll. The work roll with the smaller diameter is supported via the additional roll. The additional roll is mounted in additional roll chocks and the work roll with the smaller diameter is situated in work roll bearings of the additional roll chocks.

Abstract: For preloading a tapered roller bearing (1) secured with a conical seat on a tapering roll neck (3) of a roll (2), in particular, a back-up roll, arranged in a roll stand by means of a chock (4), by application of a hydraulic pressure thereto, the bearing inner ring (18), rollers, (17) and the bearing outer ring (17) of the tapered roller bearing (1) are subjected to pressure produced during rolling and are radially preloaded against the roll (2). An annular pressure-applying device is supported on the roll (2) by an axial bearing provided on the roll end neck, is arranged against the bearing outer ring of the tapered roller bearing (1) and, upon application of pressure, displaces the chock (4) with the bearing outer ring (13) in a direction toward the roll body (15) or the roll (2) in an opposite direction.

Abstract: For preloading a tapered roller bearing (1) secured with a conical seat on a tapering roll neck (3) of a roll (2), in particular, a back-up roll, arranged in a roll stand by means of a chock (4), by application of a hydraulic pressure thereto, the bearing inner ring (18), rollers, (17) and the bearing outer ring (17) of the tapered roller bearing (1) are subjected to pressure produced during rolling and are radially preloaded against the roll (2). An annular pressure-applying device is supported on the roll (2) by an axial bearing provided on the roll end neck, is arranged against the bearing outer ring of the tapered roller bearing (1) and, upon application of pressure, displaces the chock (4) with the bearing outer ring (13) in a direction toward the roll body (15) or the roll (2) in an opposite direction.