Timken T138-904A1 Tapered Roller Thrust Bearing

The Timken T138-904A1 is a TTC-style tapered thrust roller bearing designed to carry heavy single-direction axial loads while preserving precise shaft positioning in industrial power transmission systems. Commonly used in rolling mills, industrial gearboxes, construction equipment, machine tools, and mining machinery for dependable thrust load support and long bearing life. Key specifications include a 1.385 in bore, 2.625 in outside diameter, and 0.7656 in overall width, with tapered rollers as the rolling elements, a separable assembly for straightforward installation and maintenance, and a maximum shaft fillet radius of 0.030 in. Constructed from high-quality bearing steel and compatible with oil or grease lubrication, the T138-904A1 weighs 0.699 lb, carries a single-direction axial load, features a no-oil-hole retainer, and has a 9,450 lbf (42,200 N) steering pivot rating; common replacements include Timken T138, T138W, and SKF tapered thrust roller bearing equivalents.