Roll device for rolling metal strips, roll arrangement for use in such a roll device and method for converting a roll device

A five-high rolling mill stand for rolling metal strips, comprising:

• a rolling mill stand (2);
• an upper backup roll (11) mounted to the rolling mill stand (2) by upper backup roll chocks (13);
• an upper work roll (4), the upper work roll (4) being directly supported by the upper backup roll (11) and mounted to the rolling mill stand (2) by upper work roll chocks (5);
• a lower work roll (6), the lower work roll (6) having a smaller diameter than the upper work roll (4);
• a lower backup roll (12) mounted to the rolling mill stand (2) by lower backup roll chocks (14);
• an additional roll (8) arranged between the lower work roll (6) and the lower backup roll (12) for indirectly supporting the lower work roll (6), the additional roll (8) being mounted by additional roll chocks (7);
• and
• a roll gap (W) between the upper work roll (4) and the lower work roll (6),
• wherein the lower work roll (6) is situated in lower work roll bearings (9) of the additional roll chocks (7), and
• wherein the additional roll (8) and the lower work roll (6) form a replaceable roll arrangement (10),
• wherein the lower work roll bearings (9) are disposed in upwardly open pockets (26) of the additional roll chocks (7), and
• wherein a position of the lower work roll bearings (9) within the replaceable roll arrangement (10) is adjustable by exchangeable wear plates (16) or by a hydraulic setting device.