This insert ball bearing carries a spherical outer ring that seats in a matching housing bore, allowing self-alignment while the inner ring is fixed to the shaft by an eccentric locking collar. Bore diameter is 30.0 mm, outside diameter 55.0 mm, width 18.5 mm, and net mass 0.18 kg. Sealing on both sides is of the NPP type, integrated into the design as indicated by the B suffix. The eccentric locking collar gives a secure, play-controlled grip on the shaft without requiring a separate fastening element, while the spherical outer ring compensates for slight shaft misalignment relative to the housing. The NPP seals on both faces restrict ingress of dust and moisture into the raceway area, supporting operation with the grease fill built into the bearing. The overall construction suits mounting positions where the shaft cannot be perfectly aligned with the housing bore and where the eccentric collar allows straightforward fitting from one side.