The Timken Company T189W Tapered Thrust Bearing

The Timken T189W TTCS tapered thrust roller bearing is engineered to carry heavy unidirectional axial loads in industrial power transmission systems, gear drives, and heavy-duty machinery, delivering reliable thrust support for rolling mills, industrial gearboxes, machine tools, and construction equipment. It features a bore of 1.885 in (47.879 mm), an outside diameter of 3.266 in (82.956 mm), and an overall width of 0.9063 in (23.020 mm), with a maximum shaft fillet radius of 0.030 in (0.8 mm). The W-designation retainer includes oil holes to improve lubrication under demanding operating conditions, and the rolling elements are tapered rollers designed for single-direction axial loads. Weighing about 1.1 lb (0.5 kg) with a steering pivot rating of 14,300 lbf (64,000 N), this bearing is made from high-quality bearing steel and supports lubrication with oil or grease. It is commonly used in mining equipment, steel mills, heavy industrial machinery, gear drives, presses, and power transmission systems, as well as rolling mills, industrial gearboxes, machine tools, and construction equipment. Common replacements include Timken T189, Timken T189W-904A2, and SKF tapered thrust roller bearing equivalents.