UC211 Black Oxide Plated Insert 55mm Bore BearingUC211 Black Oxide Plated Insert Ball Bearing 55mm Inner Diameter UC211 Black Oxide Plated Insert Ball Bearing, bearing is wide inner ring with spherical outer ring, bearing is re lubrication groove with oil hole on set screw side, bearing is anti rotation pin on side opposite grease groove, bearing is nylon patched class 3A set screws. UC211 black Bearing Oxide Plated Insert Ball Bearing Shaft Diameter: 55mm Dynamic load rating: 43325 N Static load