This cylindrical roller bearing is a single row design with a solid brass cage (M1A), featuring two ribs on the outer ring and one rib on the inner ring, which allows the bearing to function as a semi-locating bearing while permitting axial displacement of the non-ribbed side. Bore diameter is 40.0 mm, outside diameter 90.0 mm, and width 33.0 mm, with a net mass of 1.057 kg. The reinforced E design increases load carrying capacity within the same envelope dimensions. Limiting speed is rated at 14200 1/min, with a reference speed of 5800 1/min. Radial internal clearance corresponds to C3 (Group 3), providing additional internal play to compensate for interference fits and thermal expansion during operation. The one-piece rib on the inner ring guides the roller set axially in one direction, while the loose side of the assembly accommodates shaft elongation without inducing axial preload. The machined brass cage ensures stable roller spacing at the given speed range, and the bearing is supplied without integrated sealing, requiring external contamination protection and a separate lubrication system, either grease or oil, matched to the reference speed rating.