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Heavy-Duty Needle Roller Bearings

Heavy-duty needle roller bearings consist of a machined and ground channel-shaped outer ring with a complement of needle rollers and a cage.  The high-strength cage retains and guides the rollers.  An optional lubrication groove and hole in the outer ring facilitates re-lubrication.  These bearings can be used with or without a machined and ground inner ring, depending on the suitablity of the shaft as a raceway surface.  Thick outer ring provides maximum load capacity and shock resistance with a relatively small radial cross section.