Timken477/472Single-Row Tapered Roller Bearing, Cone and Cup, 2-1/2 in Bore x 4.7244 in OD

Product Description

What this part is

A Timken 477/472 single-row tapered roller bearing, supplied as both halves together: the 477 cone with its rollers and cage, and the 472 cup. Bore 2-1/2 in, outside diameter 4.7244 in.

Quantity and configuration

1 Set — one cone and one matching cup, which is one complete bearing.

Decoding the designation

Timken writes a tapered roller bearing as cone number over cup number. 477 is the cone and fixes the bore, the cone width and the raceway angle. 472 is the cup and fixes the outside diameter and the matching outer raceway. The two numbers together identify one complete TS single-row bearing, and either half can be ordered on its own by its own number.

What these specs mean in practice

Tapered roller geometry carries high radial load together with substantial thrust in one direction through the raceway angle, which is why the type is normally used in pairs facing opposite ways so the shaft is located both ways. The two halves separate for mounting — the cup presses into the housing, the cone onto the shaft — which is what lets a tapered roller bearing go into a through-bored or split housing that a one-piece bearing could not enter.

Condition

New old stock with surface staining from storage. The raceways, rollers and ground faces are unused.

Fitting notes

Cup and cone are pressed home separately, each with force on its own back face and never through the rollers. Once both are seated, the bearing is set by moving one race axially against the other to establish the intended end play or preload — a tapered roller bearing carries no built-in clearance, so the setting is made on assembly.

Interchange guidance

477 and 472 are industry-standard numbers, so a cone marked 477 and a cup marked 472 from another tapered roller bearing maker interchange as the same specification. The 472A and 473 are different cups in the same family with their own outside diameters, so they are related sizes rather than substitutions.