Timken47681/47620Single-Row Tapered Roller Bearing Set 3-3/16 in Bore, 5-1/4 in Outside Diameter, Cone and Cup Supplied Together

Product Description

What this part is:

A Timken 47681/47620 single-row tapered roller bearing set, 3-3/16 in bore by 5-1/4 in outside diameter. Both halves are supplied: the 47681 cone and the 47620 cup. Timken also catalogues this pairing as the assembly number 47681-90017.

Decoding the designation:

The 47681 number is the cone and the 47620 the cup, written as a pair in the usual cone/cup convention. A Timken -90xxx number denotes a complete assembly, so 47681-90017 is the assembly designation for this cone and cup supplied together as a single-row bearing.

What these specs mean in practice:

Buying cone and cup as a catalogued pair means the raceway angle and roller path are matched between the two halves, which is what a tapered roller bearing depends on. A single row carries radial load and thrust in one direction, so it is usually mounted against a second bearing that takes the reverse thrust.

Quantity and configuration:

One set: one cone and one cup, single row.

Fitting notes:

The cup is pressed into the housing bore on the cup face and seated square against its shoulder; the cone is an interference fit on the shaft, pressed on the inner ring face only. Running clearance or preload is then set at the shaft on assembly.

Interchange guidance:

The component numbers are the Timken 47681 cone and the Timken 47620 cup, and the pairing is catalogued as 47681-90017. A 47681 cone against a cup outside this published pairing is a different bearing, since the raceway angle is matched between the two halves.