The Timken Company 3780 Tapered Roller Bearing Cone

The Timken 3780 single-row tapered roller bearing cone delivers reliable high-load support for heavy-duty rotating equipment and industrial power transmission, with a dynamic radial load rating of 27,500 lbf (122,000 N) and a dynamic thrust rating of 4,120 lbf (18,300 N). It features a 1.5000 in bore (38.100 mm), an inner ring width of 1.1930 in (30.302 mm), and belongs to the 3700 series, with a weight of 3.90 lb (1.77 kg). The cage material is stamped steel and the maximum shaft fillet radius is 0.140 in (3.600 mm). Compatible cups include Timken 3720, 3726, 3730, 3732, and 3733, making it suitable for retrofit or replacement in existing assemblies. This cone is designed for demanding applications requiring precise shaft alignment and support for combined radial and thrust loads, commonly used in industrial gearboxes, conveyor drives, mining machinery, construction equipment, agricultural machinery, and material handling systems where dependable bearing performance and long service life are essential. It is widely employed for equipment repair, bearing replacement, and drivetrain retrofits to restore reliable operation in heavy-duty axle assemblies and power transmission systems. Additional verified ratings include a dynamic radial load rating (C1) of 27,500 lbf (122,000 N), a dynamic radial load rating (C90) of 7,120 lbf (31,700 N), a static radial load rating (C0) of 34,300 lbf (153,000 N), and a dynamic thrust load rating (Ca90) of 4,120 lbf (18,300 N). Common replacements: SKF 3780, NTN 3780, KOYO 3780.