UC208 40mm Black Oxide Plated Plated Insert 40mm Bore BearingUC208 40mm Black Oxide Plated Insert Ball Bearing 40mm Inner Diameter UC208 40mm Black Oxide Plated Insert Ball Bearing, bearing is wide inner ring with spherical outer ring, bearing is relubrication 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. UC208 BLK Bearing Oxide Plated Insert Ball Bearing Shaft Diameter: 40mm Dynamic load rating: 32650 N Static