Timken33895-90056TDO Two-Row Tapered Roller Bearing Assembly – 2.1250 in Bore, 3.7500 in Outside Diameter, 2.5000 in Width, Double Cup, Class 3 Precision, Case-Carburised Steel

Product Description

What this part is

A Timken two-row tapered roller bearing assembly of TDO type — Tapered Double Outer. One double cup carries both raceways in a single outer ring, two single cones sit inside it back to back, and a cone spacer sets the distance between them. Bore is 2.1250 in, outside diameter 3.7500 in, and overall assembly width 2.5000 in. The bearing is open, with stamped steel roller cages, and is built to Timken precision Class 3.

Decoding the designation

33895-90056 is a Timken assembly number: the -90xxx suffix identifies a factory-matched set rather than a component. The pieces inside it carry their own numbers — cone 33895, double cup 33821D, cone spacer X1S-33895. The D on the cup number marks a double cup, one outer ring ground with two raceways, and the X1S prefix marks a cone spacer. The same component pairing is also catalogued as 33895/33821D and under the assembly number 33895-99404.

What these specs mean in practice

A TDO takes heavy radial load and thrust in both directions, and the two rows sit back to back, which gives a wide effective spread between the load centres and therefore high resistance to overturning moments. Because the double cup is one piece and the spacer is ground to length, the internal setting arrives fixed from the factory, so the mounted endplay is repeatable without a shop setting procedure. Class 3 tolerances tighten bore, outside diameter and width beyond the standard Class 2 inch range, which holds shaft and housing position more closely.

Quantity and configuration

One complete assembly: two cones, one double cup and one cone spacer, four pieces supplied as a matched set. Two rows.

Fitting notes

The double cup is located in the housing bore and the two cones are pressed onto the shaft against the spacer, which fixes the row spacing. The cone spacer is ground to this specific assembly, so it stays with the set. Because the setting is fixed by the spacer, clamping the cone faces solid against the shaft shoulder and end retainer gives the intended internal setting directly. Lubrication is by oil or grease.

Interchange guidance

The assembly matches the Timken 33895/33821D component pairing, also catalogued as assembly 33895-99404. Other cones run in the same 33821D double cup on different bores — 33885 at 1.75 in, 33890 at 2.0625 in, and 33889 — so those assemblies are related sizes at the same outside diameter rather than substitutions. A Class 2 build of the same pairing shares the envelope and the ratings but a wider tolerance band.