Timken52400-90135Two-Row Tapered Roller Bearing Assembly 4 in Bore, 8-15/16 in Outside Diameter, Complete With Cone and Cup Spacers

Product Description

What this part is

A Timken 52400-90135 two-row tapered roller bearing assembly, 4 in bore by 8-15/16 in outside diameter. The assembly is supplied complete as seven pieces: two 52400 cones, two 36920 cups, one K99236, one X8S-52400 cone spacer and one Y1S-36920 cup spacer.

Decoding the designation

A Timken -90xxx number denotes a complete assembly rather than a component, so 52400-90135 is the assembly part number built on the 52400 cone. The X8S- prefix identifies a cone spacer and the Y1S- prefix a cup spacer; together they set the axial spacing of the two rows.

What these specs mean in practice

Two opposed rows carry thrust in both directions and resist moment loading, where a single row would let the shaft tilt under offset load. The matched spacers are what make the internal setting a property of the assembly rather than of bench shimming, so the bearing can be replaced as a unit and come up to the same clearance each time.

Quantity and configuration

One complete assembly, seven pieces: two cones, two cups, one K99236, one cone spacer, one cup spacer.

Fitting notes

The cups and the cup spacer are fitted into the housing bore in the ground order and seated square; the cones and cone spacer go onto the shaft. The spacers are matched to the rings supplied with them, so the seven pieces stay together as one set.

Interchange guidance

The component numbers are the 52400 cone, the 36920 cup, the X8S-52400 cone spacer and the Y1S-36920 cup spacer. A single 52400 cone with a single 36920 cup is a one-row bearing and is a different product from this assembly, not a substitute for it.