1)Structure&Feature:

Needle roller bearings have a high load carrying capacity in addition to their low cross-section and stiffness. They are especially suitable for bearing arrangements where radial space is limited. 
Because needle roller bearings only carry pure radial load and can not limit the axial displacement of shaft relative to the housing. It is important to ensure that inner ring axis and outer ring axis must be aligned during mounting the bearings. The structures of needle roller bearings are diversities, can be manufactured by a pair of rings and a full complement of rollers, or a full complement of rollers only. The diameter of rollers are oversize of 5mm, the bearings named Long Cylindrical Roller Bearings.

2) Application Fileds:
Widely used in motorcycles, mopeds, automobiles, power/pneumatic tools, high industrial/engineering and printing machinery, machine tools, textile machenaries etc.