This needle roller bearing carries a solid outer ring with machined needle rollers guided directly against the shaft, giving a compact radial section for the load capacity achieved. Outside diameter is 57.0 mm, net mass 93.34 g, limiting speed 9800 1/min and reference speed 6000 1/min. The cage is of standard design, holding the needle set in position and permitting smooth relative motion of the rollers. Because there is no inner ring, the shaft seat must be hardened and ground to the specified tolerance to serve as the running surface for the needle rollers. The standard cage keeps roller spacing constant and supports the stated speed ratings, while the light series outer ring section suits applications where radial space is limited but full needle roller load capacity is still required. Lubrication should be maintained on the shaft raceway and needle set according to the reference and limiting speed values given.