Get your semi Ready for the Road Ahead™ with a secure housing for roller bearings, with the NTN 1.57" Steel Tapered Roller Bearing Cup. This replacement cup helps reduce the amount of mechanical friction between two mechanical components, thanks to its ability to hold the roller bearings in place. Engineered with a case carburized steel material to provide long-term durability. FleetPride is your First Click in Heavy Duty®.