This bearing carries rolling elements at a contact angle of 25°, matched for precision spindle applications with a bore diameter of 55.0 mm, outside diameter of 100.0 mm, and width of 21.0 mm. Net mass is 0.637 kg. The design uses a T cage and non-contact lip seals fitted on both sides, keeping friction low while limiting the ingress of contaminants. Restricted tolerances place this bearing in the P4S accuracy class, and the design is intended for adjusted mounting in pairs or sets, denoted by the UL suffix. The 25° contact angle allows this bearing to take up combined radial and axial loads while supporting high rotational speeds typical of spindle arrangements. Because it is supplied for paired or set mounting, correct preload is established through matched faces, which is essential for maintaining running accuracy under the P4S tolerance class. The non-contact lip seals reduce heat generation compared to contact-type seals, making the bearing suitable for grease lubrication in applications where consistent running accuracy and low friction are required. The T cage contributes to stable cage guidance at the speeds this bearing type is designed for.