Date: 2013-08-02

knowledge of Model RNA, NK Needle Roller Bearings

 Model RNA, NK Needle Roller Bearings :

The needle roller bearing without inner ring is suitable for the parts of which the radial size is limited.

Because of no inner ring, the surface of shaft journal fitted with it is acted directly as rolling surface. It is

requested that the surface hardness be no less than HRC60, surface roughness, no more than 0.63µm. This

kind of bearing does not limit the axial shift of shaft and housing and has high limiting rotational speed.

The inner ring has no shoulder in this bearing. For this purpose, the inner ring, outer ring, complete set of

needles and cage can be mounted respectively. This bearing does not limit the axial shift of shaft and outer

housing. Since the cage separates the needles so as to reduce friction. It can be used for the parts with high

 

rotational speed.

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Next: knowledge of Seal Ring Needle Roller Bearings/Model RNAO Needle Roller Bearing

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Product Model	Inside Diameter	Outside Diameter	Thickness
54305U NACHI	25	52	34
54205U NACHI	25	47	28

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