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-23827 mil spec single material response lubrication material document and classification, rigid alignment type, 0.6243 inches minimum and 0.6250 inches maximum bore diameter, 0.7400 inches minimum and 0.7500 inches maximum inner ring width, contact bearing seal type