Timken NA48291 Roller Bearing Cone 5 Inch Bore

The Timken NA48291 roller bearing cone is a double-row tapered roller bearing inner-ring assembly with a 5.0000 in (127 mm) bore, designed for heavy-duty equipment and applications where combined radial and axial loads must be supported. When assembled, it has an outside diameter of 7.1875 in (182.563 mm), a cone width (T) of 3.3750 in (85.725 mm), and an outer ring width (C) of 2.8750 in (73.025 mm), with a stamped steel cage and high-grade bearing steel construction weighing about 15.71 lb (7.13 kg). It provides verified dynamic load ratings for mixed radial and axial service, including C1 radial 105,000 lbf (466,000 N), C90 radial 15,600 lbf (69,400 N), C90-2 two-row radial 27,200 lbf (121,000 N), and Ca90 axial 8,160 lbf (36,300 N). The cone is compatible with Timken 48220D double cups and is commonly replaced as part of NA48291/48220D bearing assemblies. Typical applications include mining equipment, steel mills, industrial gearboxes, rolling mills, conveyors, and other heavy-duty material handling systems that demand precise shaft alignment and long bearing life.