Timken455-3Tapered Roller Bearing Cone, 2.0000 in Bore, 1.1542 in Cone Width, Class 3 Precision, Case-Carburized Steel

Product Description

What this part is:

A Timken 455-3 single tapered roller bearing cone in Class 3 precision — the inner ring complete with its tapered roller set and cage, as one non-separable unit. Brand: Timken. Part Number: 455-3. Cone Part Number: 455. Base Number: 455. Series: Timken imperial TS tapered single, 450 sequence. Bore: 2.0000 in / 50.800 mm. Cone Width: 1.1542 in. Number Of Rows: 1. Precision Class: Timken Class 3. Bearing Class: Class 3. Bearing Material: Case-carburized steel. Cage Type: Stamped, roller-guided. Cage Material: Steel. Closure Type: Open. Cone Backface To-Clear Radius: 0.14 in. Cone Frontface Backing Diameter: 1.95 in. Cage-Cone Frontface Clearance: 0.08 in. Cage-Cone Backface Clearance: 0.07 in. Effective Center Location: -0.28 in. Design Units: Imperial (inch). Harmonization Code: 8482.20.00.

Decoding the designation:

455: Timken imperial TS (tapered single) cone part number, 2.0000 in bore. -3: Timken precision Class 3, a tighter bore, width and runout grade than the standard Class 4 / K tolerance. The carton often stamps the class with a leading asterisk, so the same part appears as 455 *3, 455-3 and 4553.

What these specs mean in practice:

Tapered roller bearings carry heavy combined radial and thrust load because the roller, cone raceway and cup raceway apexes meet at a common point — that geometry lets one bearing take thrust in one direction while supporting a large radial load. They are fitted in opposed pairs so the pair locates the shaft both ways and the setting, endplay or preload, is adjustable at assembly. Class 3 earns its price where the bearing sets a gear mesh or a machine tool spindle: tighter runout means less variation in the dialled-in setting and less pattern shift on the gear teeth.

Quantity and configuration:

Cone only — inner ring, rollers and cage as one non-separable unit. Unit Quantity: 1 Pc. Mating cups: Timken 453, 453A, 453B, 453X, 454 and 4536. The common assembly is 455/453X, which measures 2.0000 in bore x 4.1250 in outside diameter x 1.1875 in overall width (T), with a 0.9687 in cup width.

Interchange guidance:

The 455 cone is catalogued against Timken cups 453, 453A, 453B, 453X, 454 and 4536. Inch tapered roller numbers are shared across makers: Koyo 455, NTN 455, SKF 455, Bower / BCA 455 and Federal-Mogul 455 are standard-class cones carrying the same number. A plain Timken 455 without the -3 suffix is Class 4 / K precision; the -3 cone is Class 3 and fits any standard 455 application.