Abstract: A rolling mill assembly (1) for metal sections equipped with a drive assembly (27) comprising means (7) of rotating a pair of shafts (2, 3) each of which supports a rolling mill roll (12, 13) locked between two supports (16, 17), said drive assembly (27) having a front frame (6), said pair of shafts (2, 3) supporting in an axially removable manner said rolls (12, 13) and being supported at both ends by a pair of uprights (4, 5) forming a stand (26), one (5) of the uprights of said pair (4, 5) being designed to be made transiently and frontally integral with said front frame (6), said rotating means (7) being made continuously and coaxially integral with said pair of shafts (2, 3) when the stand (26) is mounted on the drive assembly (27), there being provided eccentric means (8, 8', 8") of containment, guide and positioning of the shafts (2, 3, 7) for center to center distance adjustment of said rolls (12, 13).