This needle roller bearing carries a single row of needle rollers running in a particularly thick-walled outer ring, together with a separate inner ring and a needle roller and cage assembly. Bore diameter is 25.0 mm, outside diameter 52.0 mm, and net mass 0.182 kg. The outer ring is not axially guided, the design is open, and the inner ring, outer ring and needle roller and cage assembly can all be mounted separately. The thick-walled outer ring gives the bearing high radial load capacity for its size, while the separate mounting of the components allows flexible assembly sequencing. As the bearing is supplied without sealing, the mounting location must provide its own protection against contamination and its own lubrication supply, since no grease or oil is retained internally by the bearing itself.