Timken 3958-D Double Row Tapered Bearing Cone

The Timken 3958-D double-row tapered roller bearing assembly (TDI) with 39520 cups and collar provides high load capacity and precise shaft positioning for heavy-duty rotating equipment and industrial power transmission systems. Designed for combined radial and axial loads, it is commonly used in industrial gearboxes, rolling mills, mining equipment, material handling, and construction machinery where rigid shaft support is required. This imperial-unit bearing set comprises a 2.2500 in bore (57.150 mm), an outside diameter of 4.4375 in (112.713 mm), a double cone width of 2.8660 in (72.796 mm), and cup widths of 0.9375 in (23.813 mm) each, with a stamped steel cage and includes a bearing collar. The dynamic radial load rating (C1) is 54,300 lbf (242,000 N), static radial rating (C0) 43,000 lbf (191,000 N), and dynamic thrust rating (Ca90) 5,570 lbf (24,800 N). Weight is approximately 8.0 lb (3.6 kg). The assembly is produced by Timken, part number 3958-D / 39520, and is commonly replaced by SKF 3958-D/39520, NTN 3958-D/39520, or KOYO 3958-D/39520.