UC217 Black Oxide Plated Axle Bearing Insert 85mm MountedUC217 Black Oxide Plated Axle Bearing Insertg 85mm Inner Diameter UC217 Black Oxide Plated Axle Bearing Insert, Bearing is standard duty, bearing is Wide inner ring with spherical outer ring. Black oxide has certain properties and characteristics that makes it ideal for certain applications. It is used to add corrosion resistance and for appearance. UC217 black Bearing Insert Black Oxide Plated Axle Bearing Insert Shaft Diameter: 85mm Dynamic Load