Each FAG bearing has a designation that clearly indicates the type, dimensions, tolerances and internal clearance. The FAG bearing nomenclature consist of prefix, designation, and suffix. The basic FAG bearing number indicates the FAG bearing type and width and diameter. Prefix and suffix of FAG bearing identify cage styles, seal types, internal clearances, etc.

FAG bearings that have the same standardised designation are interchange­able with each other. In the case of separable bearings, it cannot always be ensured that individual parts with the same origin can be interchanged with each other. In Germany, the FAG bearing designations are standardised in DIN 623-1. These designations are also used in many other countries. Please refer to SKF bearing designation.

FAG bearing designation is identified as the table below:

The basic designation of FAG bearing

The designation for the FAG bearing series comprises numbers and letters or letters and numbers. It indicates the type of FAG bearing, the diameter series and, in many cases, the width series too. The basic designation contains the symbols for the FAG bearing series and the bearing bore.

The code of FAG bearing type

• 0: Double row angular contact ball bearing
• 1: Self-aligning ball bearing
• 2: Spherical roller bearing, spherical roller thrust bearing
• 3: Tapered roller bearing
• 4: Double row deep groove ball bearing
• 5: Axial deep groove ball bearing
• 6: Single row deep groove ball bearing
• 7: Single row angular contact ball bearing
• 8: Axial cylindrical roller bearing
• C: Toroidal roller bearing
• N: Single row cylindrical roller bearing
• NN: Double row cylindrical roller bearing
• QJ: Four point contact bearing

The diameter and width series

Width and diameter series are described using numbers. In the case of radial bearings in accordance with DIN 616 and ISO 15, these are as follows:

• For width series, the numbers 8, 9, 0, 1, 2, 3, 4, 5, 6, 7
• For the designation of diameter series, the numbers 7, 8, 9, 0, 1, 2, 3, 4, 5

Dimension series for FAG radial bearings (excluding tapered roller and needle roller bearings)

The FAG bearing bore code

The bore code is derived from the diameter d of the FAG bearing bore; with a factor of 5 or the addition of an oblique.

For d ＜ 10 mm, the bore diameter is stated in the basic designation

For certain FAG bearing types, the bearing bores are stated directly or in an encoded form in accordance with DIN 623-1. Up to d ＜ 10 mm, the bearing bore diameter is specified in the dimension-specific part of the designation (basic designation) directly as a number indicating the diameter.

For example: FAG deep groove ball bearing 608, bore diameter = 8mm.

The bore code describes the FAG bearing bore from d ≧ 10 mm

For nominal dimensions d ≧ 10 mm to d ＜ 500 mm, the diameter is described by means of a bore code.

For bores from 10 mm to 17 mm, the following applies:

For all FAG rolling bearings in the range from d = 20 mmto d = 480 mm (excluding double direction axial bearings), the bore code is formed by dividing the dimension of the bearing bore by 5.

For example: FAG 7314-B-TVP-UA Bearing, bore d = 70 mm divided by 5 (70:5), bore code = 14.

From d ＞ 480 mm

From d ＞ 480 mm, the unencoded bore diameter is given with an oblique after the bearing series, e.g. FAG 232/500-BEA-XL-MB1 bearing with bore diameter d = 500 mm.

Intermediate sizes

The intermediate sizes, such as bore diameter d = 22, 28 and d = 32 mm for example, are also given with an oblique as /22, /28 and /32.

Designations of FAG metric tapered roller bearings

The above figure describes as an example the structure of the designation for a FAG metric tapered roller bearing (dimension series to ISO 355, designation to ISO 10317). The 3 indicates the contact angle range. The first letter (F in this case) indicates a diameter series. Each diameter series has a certain ratio D/d (outside diameter to bore diameter). The second letter (E in this case) indicates a width series. Each width series has a certain ratio of bearing width T to the height of the bearing cross-section. The addition of the letter T (for tapered roller bearing) at the start and a three-digit number at the end for the bearing bore diameter in mm (in this case 120) gives the complete designation of a FAG tapered roller bearing.

FAG bearing prefix

The prefix normally identifies individual FAG bearing parts of complete bearings (in certain cases, this may also be part of the basic designation)

FAG bearing suffix

FAG deep groove ball bearing suffixes

Suffixes and corresponding descriptions, FAG single row deep groove ball bearings

Suffixes and corresponding descriptions, FAG double row deep groove ball bearings

FAG angular contact ball bearing suffixes

Suffixes and corresponding descriptions

FAG four point contact bearing suffixes

FAG self-aligning ball bearing suffixes

FAG cylindrical roller bearing suffixes

FAG tapered roller bearing suffixes

FAG tapered roller bearing for special applications. Special designs, available by agreement

FAG barrel roller bearing suffixes

FAG spherical roller bearing suffixes

FAG thrust ball bearing suffixes

FAG axial deep groove ball bearings suffixes

FAG thrust roller bearing suffixes

FAG axial spherical roller bearings suffixes