This cylindrical roller bearing carries a single row of rollers guided by a solid brass cage (M1), with two ribs on the outer ring and a smooth inner ring, which lets the inner ring displace axially relative to the outer ring — a non-locating bearing design. Bore diameter is 55.0 mm, outside diameter 90.0 mm, width 18.0 mm, net mass 430.99 g. Limiting speed reaches 15600 1/min, reference speed 6900 1/min, radial internal clearance is CN (Group N), running accuracy class P6. The smooth inner ring and separate ribs allow free axial movement of the shaft within the housing, so the bearing takes up shaft expansion without inducing axial preload, while the radial load path stays fully rated. Clearance in group CN suits standard fit conditions, and the P6 accuracy class supports applications requiring tighter running tolerances than standard P0. The brass cage keeps roller spacing stable at higher speeds and reduces friction losses compared with pressed steel cages, matching the stated limiting and reference speed values.