This insert ball bearing carries a spherical outer ring, allowing it to seat and self-align within a housing bore, with shaft location achieved through an adapter sleeve rather than a straight bore fit. The UK208 has an outside diameter of 80.0 mm, a width of 31.0 mm, and a net mass of 0.7 kg. Sealing is provided on both sides by 2RSR seals, which retain grease and keep contaminants out of the rolling contact area. The spherical outer ring combined with adapter sleeve mounting simplifies alignment on plain shafting and accommodates a degree of shaft-to-housing misalignment during installation. The 2RSR sealing arrangement supports grease lubrication and reduces the need for frequent relubrication, making this bearing suited for radial loading applications where straightforward sleeve-based shaft fixing is preferred over a locking collar or set screw design.