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Needle bearing assembly has a lot of length to diameter in 3 ~ 10 times of long and thin needle, so that the structure is compact, needle inscribed circle diameter and the ratio of bearing outside diameter is small, has a relatively large radial load capacity.

  Needle roller bearing are: the outer ring is made of special alloy steel plate stamping outer ring needle roller bearings, the entity of cutting ferrule outer ring needle roller bearings, and saves the retainer ring and the structure of the needle component and needle roller bearings. And, along with a variety of inner ring, without the inner ring, or a cage, the difference between the structure of the cage. Bearing retainer, the main use of stamping steel cage