TimkenEE540550Tapered Roller Bearing Cone 5-1/2 in Bore, EE Large-Bore Series

Product Description

What this part is

A Timken EE540550 tapered roller bearing cone — the inner ring complete with its tapered rollers and cage, 5-1/2 in bore. The cone is the half of a tapered roller bearing that goes onto the shaft.

Quantity and configuration

1 Pc. Cone only.

Decoding the designation

EE is the Timken prefix for the large-bore inch tapered roller series, and 540550 is the cone number, which fixes the bore, the cone width and the raceway angle together. Numbers in the EE5405xx block sit close together in bore but are distinct cones with their own cups, so the full number identifies the part rather than the block.

What these specs mean in practice

At 5-1/2 in bore this is heavy industrial section: gearbox and pinion stands, mill and press shafting, crane travel and hoist drives, and large conveyor head shafts. A tapered roller bearing of this size is chosen because it takes very high radial load together with substantial thrust through the raceway angle, in one compact width. The cone assembly is a unit in service — inner ring, rollers and cage are not separable and the rollers are matched to that ring.

Fitting notes

The cone goes onto the shaft as a press fit, with the force applied to the inner ring back face only and never through the rollers or the cage. A cone this heavy is normally mounted with a press or with controlled induction heating rather than by driving. Setting follows once both races are seated, by moving one race axially against the other to establish the intended end play or preload.

Interchange guidance

A cone marked EE540550 from another tapered roller bearing maker shares the bore, width and raceway angle. Adjacent EE5405xx numbers are different cones with different raceway angles and their own cups, so they are related sizes rather than substitutions. Because the raceway angle is built into the number, the cone runs correctly only against the cup catalogued with it.