Timken29580/29526DTaper Roller Bearing Set – 2.3622 in Bore, 4-7/16 in Cup Outer Diameter, 1.6875 in Cup Width, 1.0000 in Cone Width, class 3, Case-Carburized Steel.

This Timken 29580/29526D is a matched Class 3 precision TDO (Tapered Double Outer) roller bearing assembly: two 29580 cones on a single 29526D double cup, 29500 series. It carries a 2.3622 in (60 mm) bore, 4.4375 in (112.713 mm) outside diameter, and 2.1874 in (55.56 mm) overall assembly width. The TDO arrangement takes radial load plus thrust in both directions and is a standard fixed-position configuration in gearboxes, speed reducers, pinion shafts, and heavy industrial equipment.

Timken publishes a two-row dynamic radial rating (C90-2row) of 58.9 kN (13,200 lbf) and a one-million-rev rating (C1) of 227 kN (51,100 lbf) for this assembly, with K factor 1.27 and e factor 0.46. Class 3 (per the Timken precision box marking) is a tighter running-accuracy grade than standard Class 4 commercial bearings. This is a factory-matched set – Timken warns not to mix components between assemblies – made in USA, new old stock. Also written 29580-29526D, 29580/29526-D, or 29580 90101 style assembly numbers.