A single or multiple-row antifriction bearing used with or without inner or outer races characterized by relatively small size rollers usually not ranging above 0.250 inch (6.35mm) diameter and generally longer in length in relation to diameter.
mil-g-81322 mil spec single material response lubrication material document and classification, rigid alignment type, 0.4370 inches nominal inner ring width, 0.3125 inches nominal bore diameter, grease lubrication material