The Timken Company T139W Thrust Roller Bearing

The Timken T139W thrust roller bearing is a TTSP tapered thrust roller bearing designed to support heavy unidirectional axial loads in industrial power transmission systems, gear drives, and heavy-duty machinery. It uses a separable assembly with a retainer that has oil holes (W designation) to improve lubrication, and it features a bore of 1.385 in (35.179 mm), an outside diameter of 2.3125 in (58.738 mm), and an overall width of 0.625 in (15.875 mm). This bearing is configured for single-direction axial (thrust) loads, with a maximum shaft fillet radius of 0.030 in (0.8 mm), a Steering Pivot Rating of 4,800 lbf (21,400 N), a weight of 0.3 lb (0.2 kg), and it is made from high-quality bearing steel with lubrication compatible with oil or grease. It is commonly used in rolling mills, industrial gearboxes, mining equipment, machine tools, and construction equipment where high thrust load capacity and precise axial shaft positioning are required, and maintenance teams, OEMs, and system integrators use it for replacement, repair, retrofit, and equipment overhaul to restore dependable thrust load performance and maximize equipment reliability. Common replacements include Timken T139 and Timken T139W-904A2, and SKF tapered thrust roller bearing equivalents.