NK28/30 Needle Roller Bearing 28x37x30mm
The NK28/30 bearing is a Needle Roller Bearings with an inner diameter of 28 mm , an outer diameter of 37 mm, a width of 30 mm. It typically uses P0 P6 P5 P4 P2 grade precision tolerances and RS 2RS type, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.
Item No:NK28/30 needle roller bearing 28x37x30mm
Type: Solid Collar needle roller bearing without inner ring
Limiting Speed:12000 rpm in Oil
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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