| 1) Material - Outer races, inner races and rollers are made from 
            52100 steel and hardened to Rockwell hardness 60-64 RC. These 
            bearings are equipped with stamped steel cages.2) Lubrication - 
            Outer races have an external centered oil groove and one oil hole. 
            Inner races have an internal centered oil groove and one oil 
            hole.
 3) For applications where the bearing is run directly on 
            the shaft, no inner race is required. The shaft hardness should be 
            60 Rockwell C scale.
 
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