Bearingnumber chart

The designations for metric tapered roller bearings follow either the basic designation system or a designation system, established by ISO in 1977, covered in ISO 355:2007

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Bearingnumber List

Inch tapered roller bearings are designated in accordance with the relevant ANSI/ABMA standard. The designation system for tapered roller bearings is explained in the relevant product section.

The designations for needle roller bearings do not fully follow the basic designation system and are covered in the relevant product section.

Bearingseries code

Bearingnumbermeaningpdf

SKF rolling bearings not covered in the Ball bearings and Roller bearings sections, such as super-precision bearings, thin section bearings, slewing bearings or linear bearings, follow designation systems that can differ significantly from the basic designation system.

The designations for SKF Y-bearings differ somewhat from those described in the basic designation system and are covered in the relevant product section.

Bearingnumber identification pdf

Each standard bearing belongs to a given bearing series, which is identified by the basic designation without the size identification. Series designations often include a suffix A, B, C, D or E or a combination of these letters. These letters are used to identify differences in internal design.

Prefixes and suffixes identify bearing components or variants having a design and/or feature(s) that differ in some respect from the basic design.

2) Bearing 108 belongs to diameter series 0,  bearings 126, 127 and 129 to diameter series 2,  bearing 135 to diameter series 3

Bearingnumber identification

A basic SKF designation typically contains three to five digits. Some products, like cylindrical roller bearings, can have a combination of alphanumeric characters. The number and letter combinations have the following meaning:

The designations of most SKF rolling bearings follow a bearing designation system. The complete SKF bearing nomenclature may consist of a basic designation with or without one or more supplementary designations. The complete designation is always marked on the bearing package, whereas the marking on the bearing may be incomplete or deviate from the designation. The basic designation identifies:

1) Bearings 604, 607, 608, 609 belong to diameter series 0,  bearings 623, 624, 625, 626, 627, 628 and 629 to diameter series 2,  bearings 634, 635 and 638 to diameter series 3  bearing 607/8 to diameter series 9

Bearings designed to meet a specific customer requirement are typically designated by a drawing number. The drawing number does not provide any information about the bearing.