SKF HK 4012 40mm I.D Needle Roller Bearing, 47mm O.D

SKF Drawn cup needle roller bearings have a deep drawn, thin-walled outer ring with open ends (indicated by the HK prefix).,They are characterised by very low sectional height and high load carrying capacity.

Generally used directly on the shaft, which is hardened and ground. Can also be combined with an inner ring for shaft that is not hardened
Used when the housing bore cannot be used as a raceway for a needle roller cage assembly, but where a very compact and economic bearing arrangement is required