TIMKEN Bearing 02420

This is the most basic and most widely used type of tapered roller bearing. It consists of two main separable parts: the cone (inner ring) assembly and the cup (outer ring). It is typically mounted in opposing pairs on a shaft.
Material: Bearing steels
In Stock:
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Specifications of TIMKEN Bearing 02420

TIMKEN Bearing 02420




Cup Part Number


Design Units



D – Cup Outer Diameter

2.6875 in68.263 mm

C – Cup Width

0.6875 in17.463 mm

Abutment and Fillet Dimensions

r – Cup Backface “To Clear” Radius1

0.06 in1.52 mm

Da – Cup Frontface Backing Diameter

2.52 in63.00 mm

Db – Cup Backface Backing Diameter

2.32 in58.93 mm


K – Factor2


e – ISO Factor3


Y – ISO Factor4


G1 – Heat Generation Factor (Roller-Raceway)


G2 – Heat Generation Factor (Rib-Roller End)


Cg – Geometry Factor5


Product description of TIMKEN Bearing 02420

TIMKEN Bearing 02420, Tapered Roller Bearings - Single Cups - Imperial, Each tapered roller bearing contains four interdependent components: the cone (inner ring), the cup (outer ring), tapered rollers (rolling elements) and the cage (roller retainer). Tapered angles allow our bearings to efficiently control a combination of radial and thrust loads.

The steeper the outer ring angle, the greater ability the bearing has to handle thrust loads. To provide a true rolling motion of the rollers on the raceways, the extensions of the raceways and the tapered surfaces of the rollers come together at a common point, the apex, on the axis of rotation.

This is the basic and the most widely used type of tapered roller bearing. It consists of the inner-ring assembly and the outer ring. It is usually fitted as one of an opposing pair. During equipment assembly, single-row bearings can be “set” to the required clearance (endplay) or preload condition to optimize performance.

TIMKEN Bearing 02420, Tapered Roller Bearings - Single Cups - Imperial, Tapered bearings are manufactured to a number of specifications with each having classes that define tolerances on dimensions such as bore, O.D., width and runout. Metric bearings have been manufactured to corresponding standard negative tolerances. Boundary dimension tolerances for tapered roller bearing usage are listed in the following tables. These tolerances are provided for use in selecting bearings for general applications in conjunction with the bearing mounting and fitting practices offered in later sections. The following table summarizes the different specifications and classes for tapered roller bearings.

TIMKEN Bearing 02420, Tapered Roller Bearings - Single Cups - Imperial. Often referred to as snap-ring assemblies, type 2S consist of two basic single-row bearings (type TS). They are supplied complete with inner-ring and outer-ring spacers to give a predetermined bearing setting when assembled. Type 2S have a specified setting range to suit the duty of the application. They have an inner-ring spacer and a snap-ring, which also serves as the outer-ring spacer, to give axial location in a through-bored housing.

Type SR are made to a standard setting range, based on Timken’s SET-RIGHT™ automated setting technique suitable for most industrial applications. They have two spacers and an optional snap-ring that may be used for axial location. Because both types are made up of popular sizes of single-row bearings, they provide a low-cost option for many applications. There are two basic mounting arrangements for spacer assemblies.

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Literature & catalogs




Timken Tricks of the Trade – Installing a Timken® Set Right® Bearing

Timken Stronger By Design

Timken Tricks of the Trade Wheel End Bearing Removal Tips