(78) Outer Ring and roller assembly with separable inner ring Outer ring and roller assemblies and associated inner rings are packed and shipped separately. For a complete bearing, Specify both outer and inner numbers desired.
(52) Outer ring and roller assembly without separable inner ring The outer ring and roller assemblies (MR) shown in this table are for use without inner rings on a ground shaft for which a minimum hardness of 58 Rockwell "C" scale is recommended.
Needle roller bearings contain long narrow rollers formed in a cylindrical shape. These types of needle rollers allow for contact with large surface areas on the outer ring. Needle bearings are frequently used in the automotive industry, due to their compact design, which is much smaller than other cylindrical rollers. Rocker arm pivots, drive shafts, transmissions, and compressors are all applications that employ needle roller bearings.
MR series heavy duty needle roller bearings, which can be equipped with seals and inner rings, have an inner ring which is removable from the outer. In this configuration the rollers can ride directly on the shaft as long as the shaft has the proper Rockwell hardness and tolerance. This allows ...
