NTN offers premium tapered roller bearings under the NTN and Bower brand names featuring case-carburized components. Cups, cones, and rollers are made from case-hardened alloy steel of ?Bearing Quality? to provide superior fatigue life and reliability. Precise control of heat treatment, dimensions, and surface finish of the components further contribute to reliable bearing performance. </p><p> NTN-Bower Corporation is one of the largest manufacturers of precision roller bearings in North America with a primary focus on serving the transportation, construction, and agricultural implement markets.</p>