This cylindrical roller bearing has a single row of rollers guided by a solid cage (M1A), with two ribs on the outer ring and one rib on the inner ring, giving a semi-locating design that carries radial load while allowing axial displacement in one direction. Bore diameter is 30.0 mm, outside diameter 72.0 mm, width 19.0 mm, and net mass 0.415 kg. The limiting speed is rated at 18500 1/min, with a reference speed of 8900 1/min, and the internal design follows the E series for increased roller complement and load rating. Radial internal clearance C4 provides a wider-than-normal clearance, suitable for applications with shaft-housing thermal expansion or heavier interference fits. Being a semi-locating bearing, it can accommodate axial shaft movement in one direction while maintaining radial guidance, making it suitable for use as a floating bearing on one end of a shaft assembly paired with a locating bearing elsewhere. The open design without integral sealing requires external sealing arrangements and a separate lubrication system, either grease or oil, matched to the operating speed and temperature.