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Seal Ring Needle Roller Bearings:
Including the models of RNA...RS, RNA...2RS, NK...RS, NK...2RS; NA...RS, NA...2RS; NKI...RS, NKI...2RS
The seal ring needle roller with inner ring or without inner ring is the solid collar needle roller bearing
equipped with single side or double side synthetic rubber seal ring to ensure long-term lubricating function.
Model RNAO Needle Roller Without Shoulder and Inner Ring:
Because of no inner ring, this needle roller bearing is suitable for parts of which the radial size is limited.
The surface of shaft journal fitted with it is acted directly as rolling surface. It is requested that the surface
hardness of shaft journal be no less than HRC60 and the surface roughness Ra value, no more than 0.63µm.
Model NAO Needle Roller Without Shoulder and With Inner Ring:
This kind of bearing does not limit the axial shift of shaft and housing.
The outer ring and inner ring have no shoulder. For this purpose, 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.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 54204U NACHI | 20 | 40 | 26 |
| 54202U NACHI | 15 | 32 | 22 |