Basic Knowledge of Bearings- 03(Bearing accuracy class)

Basic Knowledge of Bearings- 03(Bearing accuracy class)

When it comes to bearings, accuracy is of utmost importance, The accuracy class of a bearing refers to its ability to maintain a certain level of precision during operation. Knowing about bearing accuracy class is critical for ensuring that the right bearings are chosen for your application.

The accuracy level standards of bearings are mainly divided into 5 levels: P0, P6, P5, P4, and P2. The bearing grade standard starts from level 0 and gradually increases. For general workpieces, level 0 can meet the requirements. However, in certain situations or processing requirements, bearings with a precision level of 5 or higher are required.

bearing precision

Comparison table of bearing accuracy levels in some countries
CountriesStandard No                        Precision Level
ISOISO49206542
ChinaGB3070(G)6(E)5(D)4(C)2(B)
GermanyDIN 620/2P0P6P5P4P2
USAANSI B3.14ABEC 1ABEC 3ABEC 5

The classification of accuracy levels for rolling bearings can be divided into two types: dimensional accuracy and rotational accuracy.

1. Dimensional accuracy of bearings (This mainly refers to projects related to the installation of shafts and casings).

1. There may be deviations in the inner diameter, outer diameter, width, and assembly width.

2. The diameter deviation of the inner and outer complex circles of the roller group is also allowed.

3. The allowable limit value of chamfer size.

4. Width also allows for variable momentum.

2. The rotational accuracy of bearings (this is an item related to the jumping of the rotating body)

1. The inner and outer rings can allow for axial and radial runout.

2. Lateral runout can occur in the inner ring

3. The inclination of the outer diameter surface has allowable variation momentum

4. Permissible variation in thickness of thrust bearing raceway

5. Permissible deviation and allowable variation of conical holes

The accuracy of a bearing is determined by a variety of factors, including the manufacturing process, the materials used, and the quality control measures that are in place. Bearings with higher accuracy are generally more expensive, but they can help to improve the overall performance of your machines.

In conclusion, understanding the accuracy class of bearings is crucial when choosing the right bearings for your application. The accuracy class determines the precision and cost effectiveness of the bearing. Depending on the requirements of your application, you may need to choose a bearing with a higher or lower accuracy class. Always consult with a bearing expert to ensure that you are choosing the right bearings for your specific needs.

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