The bearing dimension series is a combination of diameter series and width or height series that determines the main overall dimensions of a bearing.
According to GOST, the following diameter series are established: 0, 8, 9, 1, 7, 2, 3, 4, and 5. These series are arranged in order of increasing outer bearing diameter for the same inner diameter.
The width or height series include the values 7, 8, 9, 0, 1, 2, 3, 4, 5, 6 and are also arranged in order of increasing corresponding size. At the same time, series 0 is usually not indicated in the designation.
Non-standard bearings by inner diameter or width, or height, may have a diameter series designation of 6, 7, or 8, while the width or height series is not indicated separately.
For bearings with an inner diameter up to 10 mm, except for sizes 0.6, 1.5, and 2.5 mm, the following designation structure is used: the width series is indicated first, followed by the diameter series. For bearings with an inner diameter of 10 mm or more, except for sizes 22, 28, 32, and 500 mm or more, a similar designation principle is used, indicating the width series and diameter series in the established order.
Table 1. Examples of Dimension Series Designations
| Diameter Series \ Width Series | 7 | 8 | 9 | 0 | 1 | 2 | 3 | 4 | 5 | 6 |
|---|---|---|---|---|---|---|---|---|---|---|
| 0 | — | — | — | — | 1000000 | 2000000 | — | — | — | — |
| 8 | 7000800 | — | — | 800 | 1000800 | 2000800 | 4000800 | 4000800 | — | — |
| 9 | 7000900 | — | 9000900 | 900 | 1000900 | 2000900 | 4000900 | 4000900 | 5000900 | 6000900 |
| 1 | 7000100 | — | 9000100 | 100 | — | 2000100 | 4000100 | 4000100 | 5000100 | 6000100 |
| 7 | 7000700 | — | — | 700 | 1000700 | 2000700 | 4000700 | 4000700 | 5000700 | — |
| 2 | 7000200 | 8000200 | 9000200 | 200 | 1000200 | — | 4000200 | 4000200 | — | — |
| 3 | 7000300 | 8000300 | 9000300 | 300 | 1000300 | — | — | — | — | — |
| 4 | 7000400 | — | 9000400 | 400 | — | 2000400 | — | — | — | — |
| 5 | — | — | 9000500 | 500 | — | 2000500 | — | — | — | — |
Examples of Bearing Designations
Table 2. Examples of Bearing Designations with Inner Diameter up to 10 mm
| Bearing | Design | Width Series | Design Version | Bearing Type | Zero Sign | Diameter Series | Bore Diameter |
|---|---|---|---|---|---|---|---|
| 1000094 | single-row radial ball bearing | 1 | 0 | 0 | 0 | 9 | 4 |
| 25 | single-row radial ball bearing | 0 | 0 | 0 | 0 | 2 | 5 |
| 184009/1,5 | single-row radial ball bearing with a thrust shoulder on the outer ring | 1 | 84 | 0 | 0 | 9 | 1,5 |
| 1068 | self-aligning radial ball bearing | 0 | 0 | 1 | 0 | 6 | 8 |
| 56 | single-row radial ball bearing | 0 | 0 | 0 | 0 | 5 | 6 |
Table 3. Examples of Bearing Designations
| Bearing | Design | Width Series | Design Version | Bearing Type | Diameter Series | Bore Diameter Designation |
|---|---|---|---|---|---|---|
| 32205 | radial roller bearing with short cylindrical rollers | 0 | 3 | 2 | 2 | 5 |
| 292205 | radial roller bearing with short cylindrical rollers without an outer ring | 0 | 29 | 2 | 2 | 5 |
| 4074103 | radial needle roller bearing with a 17 mm bore diameter | 4 | 7 | 4 | 1 | 3 |
| 901 | single-row radial roller bearing with a 12.7 mm bore diameter, undefined series | 0 | 0 | 0 | 9 | 1 |
| 2910 | radial roller bearing with short cylindrical rollers and a 48 mm bore diameter | 0 | 0 | 2 | 9 | 10 |
| 602/32 | single-row radial ball bearing with a shield | 0 | 6 | 0 | 2 | 32 |
| 20071/1175 | single-row tapered roller bearing | 2 | 0 | 7 | 1 | 1175 |
