Timken3875-90027Complete Double-Row Tapered Roller Bearing Assembly, 1-1/2 in Bore, 3-3/8 in Cup Outside Diameter, Two Cones, Two Cups and Both Spacers

Product Description

What this part is

A Timken 3875-90027 complete double-row tapered roller bearing assembly in the inch series. Each assembly is built from two 3875 cones, two 3821 cups, one X1S-3875 cone spacer and one Y1S-3821 cup spacer.

Decoding the order code

3875 — cone, comprising the inner ring, the rollers and the cage.
3821 — the mating cup, which is the outer race.
X1S-3875 — cone spacer.
Y1S-3821 — cup spacer.
-90027 — Timken assembly number, marking a factory-matched complete set rather than a loose component.

Scope of supply

Complete assembly. Both cones, both cups and both spacers are included.

What these specs mean in practice

Tapered roller geometry carries heavy radial load together with thrust in one direction, and a two-row build takes thrust in both directions. The matched cone and cup spacers set the internal clearance of the pair at the factory, which is what makes a -90027 set repeatable from one assembly to the next.

Published dimensions

Cone bore: 1.5000 in (38.100 mm)
Cup outside diameter: 3.3750 in (85.725 mm)
Rows: 2
Rolling elements: tapered steel rollers

Quantity and configuration

1 complete assembly per unit, built as itemised above.

Interchange guidance

Searchable forms are 3875-90027, 387590027, 3875 90027 and the component numbers 3875, 3821, X1S-3875 and Y1S-3821. Other Timken -90xxx numbers built on the same 3875 cone and 3821 cup use different spacer widths and set-up clearances, so they are related assemblies rather than interchanges.