The Timken Company 387-S Tapered Roller Bearing Cone

The Timken 387-S tapered roller bearing cone is a single-row bearing cone designed for heavy-duty rotating equipment and industrial power transmission systems. Key specs include bore 2.25 in (57.150 mm), inner ring width 0.8640 in (21.946 mm), bearing series 385, dynamic radial load 24,200 lbf (108,000 N), static radial load 24,100 lbf (107,000 N), and dynamic thrust load 3,810 lbf (16,900 N). The cone weighs 5.55 lb (2.518 kg), uses a stamped-steel cage, supports a maximum shaft fillet radius of 0.030 in (0.800 mm), and is compatible with Timken cups 382, 382A, 384DC, and 384ED; common replacements include SKF 387-S, NTN 387-S, and KOYO 387-S. It is widely used in industrial gearboxes, conveyor drives, mining machinery, construction equipment, agricultural equipment, and material handling systems where reliable high radial and thrust load performance is essential.