Timken590900/591326Tapered Roller Bearing Cone and Cup, 7″ Bore x 13-1/4″ OD, Single Row Inch Series

Product Description

What this part is

A Timken 590900 inch tapered roller bearing cone with its mating Timken 591326 cup — the inner ring with rollers and cage, plus the outer race. Single-row TS configuration, 7.0000 in bore, 13.2500 in outside diameter.

Decoding the designation

590900 is the cone number and 591326 is the cup number. Timken writes an inch tapered assembly as cone/cup, so 590900/591326 names the matched pair. Six-digit numbers in the 59xxxx block are large-bore heavy-industrial sizes, the same numbering family as the 54xxxx large cups.

What these specs mean in practice

The tapered geometry carries heavy radial load and thrust in one direction through a single raceway. Because the cone and cup are ground as a matched raceway angle and roller path, the set is specified by both numbers together. At a 7.0000 in bore inside a 13.2500 in housing seat, this is a mill, mining and large gearbox section, where the cone/cup split matters because each ring can be pressed into place separately and the set adjusted afterwards.

Published dimensions

Bore (cone bore): 7.0000 in / 177.800 mm
Outside diameter (cup 591326): 13.2500 in / 336.550 mm
Rows: 1
Series: 59xxxx inch tapered, TS single row
Rolling element: tapered roller, chrome alloy steel
Cage: pressed steel

Quantity and configuration

Supplied as one Timken 590900 cone and one Timken 591326 cup, as titled — the two halves of a single-row tapered roller bearing.

Interchange guidance

590900 and 591326 are Timken component numbers and read the same across the inch tapered interchange under other brands’ prefixes. Cone and cup numbers adjacent in the 5909xx and 5913xx blocks differ in bore, outside diameter or width, so those are related sizes rather than substitutes for this pair.