Timken97503/97900Tapered Roller Bearing Cone and Cup Set 5-1/32″ Bore 9″ OD Inch Series

Product Description

What this part is

A Timken 97503/97900 matched single-row tapered roller bearing set — the 97503 cone (inner ring with tapered rollers and cage) together with its 97900 cup (outer race). Bore 5-1/32 in, outside diameter 9 in.

Decoding the designation

The two numbers are the two halves of one lapped set: 97503 is the cone, 97900 the cup. The 97503 is the modified-bore cone of the 97500 section, giving a 5-1/32 in journal seat against the plain 97500’s 5 in.

What these specs mean in practice

Cone and cup raceways are lapped together at manufacture, so buying them as a set carries the matched roller path and the published endplay range. A single-row tapered roller bearing carries radial load with thrust in one direction, reacted through the cup back face, which is why these positions are normally set up as an opposed pair.

Published specifications

Bearing type: tapered roller bearing, cone and cup setDesign units: inchBore: 5-1/32 in (127.79 mm)Outside diameter: 9 in (228.60 mm)Number of rows: 1Bore type: straightClosure: openCone number: 97503Cup number: 97900

Quantity and configuration

Complete single-row set: one 97503 cone and one 97900 cup. Sold as 1 Pc.

Fitting notes

The cone is an interference fit on the journal against a square shoulder and the cup presses into the housing bore; endplay or preload is set at assembly against the opposed bearing by shim or adjusting nut.

Interchange guidance

A 97500/97900 set shares the section and outside diameter but seats a 5 in journal, which makes it a related size rather than an interchange for this 5-1/32 in cone.