The Timken Company 28579 Tapered Roller Bearing Cone

The Timken 28579 tapered roller bearing cone is a single-row cone designed to be paired with a compatible Timken bearing cup to support combined radial and axial loads in heavy-duty rotating equipment. This separable cone enables straightforward installation and maintenance in industrial gearboxes, conveyor drives, machine tools, axle assemblies, and other demanding applications, with Timken cups 28520, 28521, 28523, or 28527RB providing the mating race. The cone belongs to the 28500 series and features a bore of 1.9680 in (49.987 mm) and an inner ring width of 1.0000 in (25.400 mm), along with a stamped steel cage for durability. It is rated for a dynamic radial load of 22,200 lbf (98.9 kN) and a dynamic radial load (C90) of 5,770 lbf (25.7 kN), with a static radial load rating of 29,200 lbf (130 kN) and a dynamic thrust rating (Ca90) of 3,720 lbf (16.6 kN). The maximum shaft fillet radius is 0.09 in (2.30 mm), and the assembly weighs 1.2 lb (0.5 kg). Common replacements include Timken 28579, SKF 28579, and NTN 28579, reflecting its role in heavy-duty gearboxes, conveyors, mining equipment, agricultural machinery, wheel hubs, and power transmission systems that require precise, durable radial and axial support.