Timken453B-3Flanged Tapered Roller Bearing Cup – 4.25 in Outside Diameter, 0.875 in Width, Class 3 Precision

Product Description

What this part is

Timken 453B-3 flanged inch tapered roller bearing cup. Bearing Type: Tapered roller bearing cup with an integral outer-ring flange. Series: 453. Base Number: 453B. Outside Diameter: 4.25 in (107.95 mm). Overall Width: 0.875 in (22.225 mm). Outer Ring Flange Outside Diameter (D1): 4.4640 in (113.386 mm). Outer Ring Flange Width (C2): 0.2188 in (5.558 mm). Rolling Elements: Tapered Roller. Number Of Rows: 1. Item Weight: 1.1 kg (2.5 lb).

Decoding the designation

453 — Timken base cup number, 4.25 in outside diameter.

B — flanged execution. The flange raises the outside diameter to 4.4640 in over a 0.2188 in band at one end, so the cup seats on the face of a through-bored housing instead of on an internal shoulder.

*3 — Timken Precision Class 3. Tighter running and mounting tolerance than standard class, giving lower running vibration and closer location in the housing bore. The same class is written 453B-3, 453B *3 and 453B #3.

What these specs mean in practice

e Factor: 0.34. K Factor: 1.74. Y Factor: 1.79. Geometry Factor (Cg): 0.0946. A K of 1.74 is a shallow roller angle, so this cup is weighted towards radial capacity rather than thrust.

Mounting data

Maximum fillet radius on the mating housing: 0.8 mm (0.03 in). Housing Backing Shoulder Diameter, frontface (Da): 100.58 mm (3.96 in). The flange face sets axial position, so the housing bore can run straight through.

Quantity and configuration

Unit Quantity: 1 Pc. Cup only. The matching cone is the Timken 462.

Interchange guidance

The flanged 453B is a Timken execution. The plain 453 and 453X cups share the 4.25 in outside diameter and raceway and are built by several makers, but they locate on a housing shoulder rather than on a flange face, so they are related sizes rather than drop-in interchanges for a flanged seat. For a flanged 4.25 in seat, Timken is the source.