Origin	China
Model Number	NA4908

Heavy-duty needle roller bearings have a machined and ground channel-shaped outer ring with a complement of needle rollers retained and guided by a cage. The thick outer ring provides maximum load capacity and shock resistance with a relatively small radial cross section.

With the high-strength cage retaining and guiding the rollers, this design provides high speed and lubrication retention capability. A lubrication groove and hole in the O.D. facilitate relubrication through the outer ring. These bearings can be used with or without a machined and ground inner ring depending on the suitability of the shaft as a raceway surface.

Size range: 5 mm - 100 mm (0.625 in. - 9.25 in.) bore
 

Design Attributes

                      High-strength cage retains and guides rollers

                      High speed and lubrication-retention capability.  A lubrication groove and hole in the O.D. facilitate relubrication through the outer ring.

                      Bearings can be used with or without a machined and ground inner ring depending on the suitability of the shaft as a raceway surface.

Applications

                      Gear pumps

                      Sheaves

                      Automotive transmissions

                      Two-cycle engines