Timken 31521-20024 Tapered Roller Bearing Set

The Timken 31521-20024 tapered roller bearing set is a matched single-row assembly consisting of the 31521 cone and the 20024 (31520) cup, designed to support combined radial and axial loads while maintaining precise shaft alignment. It features a bore of 1.3750 in (34.925 mm), an outside diameter of 3.0000 in (76.200 mm), and an overall width (T) of 1.1563 in (29.370 mm) with inner ring width 1.1563 in (29.370 mm) and outer ring width 0.9375 in (23.813 mm); cage material is pressed steel. Dynamic radial load ratings are 94,700 N (C1) and 24,600 N (C90), with a static radial rating of 107,000 N (C0). Weight is 0.60 kg (1.40 lb). The assembly uses precision-ground raceways, a separable cone and cup design, and optimized internal geometry to deliver high load capacity and long service life in demanding environments, while simplifying installation and preload adjustment. Applications include industrial gearboxes, conveyors, axle assemblies, agricultural machinery, machine tools, and wheel hubs where reliable performance under combined radial and thrust loads is required. Common replacements include SKF 31521/31520 and NTN 31521/31520 variants that partner with Timken’s original 31521-20024 configuration.