Timken 99100 Tapered Roller Bearing Cup Outer Race

The Timken 99100 is a precision single-row tapered roller bearing cup (outer race) designed for TS (Tapered Single) bearing assemblies that support high combined radial and axial loads. Manufactured from through-hardened bearing steel, this 99100 cup features an outside diameter of 10.0000 in (254.000 mm) and a width of 1.8750 in (47.625 mm), and is intended to pair with Timken 99500 cones (and other 99000 Series cones) to form a complete TS bearing assembly. With a matched bearing configuration, its dynamic radial load ratings are 148,000 lbf (660,000 N) in C1 and 38,500 lbf (171,000 N) in C90, and it carries a weight of 27.5 lb (12.5 kg); the design units are inch, and the housing tolerances include a maximum housing fillet radius of 0.130 in (3.30 mm), Da 9.38 in (238.30 mm) and Db 8.94 in (227.08 mm). Common applications span rolling mills, mining equipment, industrial gearboxes, paper mills, marine drives, and conveyors—industrial gear setups where precise shaft positioning and long bearing life are essential. This cup is widely used in heavy-duty power transmission systems and can be replaced by SKF 99100 Cup, NTN 99100 Cup, or KOYO 99100 Cup where applicable.