This single row cylindrical roller bearing carries two ribs on the outer ring and one rib on the inner ring, giving it a semi-locating function that allows axial displacement of the non-ribbed side while still guiding the roller set radially. Bore diameter is 45.0 mm, outside diameter 100.0 mm, width 25.0 mm, and net mass is 1.01 kg. Limiting speed reaches 12800 1/min, with a reference speed of 6400 1/min. The E design denotes an optimized internal geometry for increased load carrying capacity, and the M1 cage is a machined brass cage guiding the rollers. Radial internal clearance is set to C3, wider than standard, which compensates for thermal expansion during operation and shaft-to-housing fit tolerances. The semi-locating arrangement lets this bearing take up axial displacement on one side while the ribbed sides transmit limited axial loads in one direction, making it suitable as a floating or guiding position within a shaft arrangement where free axial movement must be permitted without loss of radial guidance.