This needle roller bearing is designed as a self-aligning unit and is supplied without an inner ring. The outside diameter is 52.0 mm, the net mass is 141.0 g, and the limiting speed reaches 12900.0 1/min. The self-aligning design compensates for shaft misalignment, allowing reliable operation even when perfect shaft-to-housing alignment cannot be maintained. Since the bearing has no inner ring, the shaft surface itself serves as the running surface for the needle rollers, which requires an appropriate shaft hardness and surface finish. The self-aligning capability makes this bearing suitable where angular deflection of the shaft occurs during operation, while the stated limiting speed defines the maximum rotational speed the bearing can sustain under the given conditions.