This needle roller bearing carries roller elements running directly on a shaft, since no inner ring is included in the design. The outer ring is fitted with 2 bords, giving axial guidance to the rollers without a separate inner race. Outside diameter is 55.0 mm, net mass is 0.137 kg. Limiting speed is rated at 10900.0 1/min, with a reference speed of 6600.0 1/min. The cage is of standard design. The absence of an inner ring keeps radial section height low, allowing the bearing to be mounted directly on a hardened and ground shaft surface, which then acts as the inner running track. The standard cage guides the needle rollers evenly around the circumference, supporting stable operation up to the stated limiting speed. Radial space savings combined with the two-bord outer ring make this arrangement suitable where a compact radial support is required and the shaft itself can serve as the inner race.