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.
3.1244 inches minimum and 3.1250 inches maximum bore diameter, 3.9992 inches minimum and 4.0000 inches maximum overall outside diameter, self-aligning alignment type