How to choose the right Insert Bearings for a specific application by load capacity?

1. Understand the type and size of load
It is necessary to clarify the type and size of the load in the application. The load can be radial (force perpendicular to the axis), axial (force parallel to the axis), or a combination of the two. Different types of loads have different requirements for bearings. For example, radial loads mainly affect the inner and outer rings of the bearing, while axial loads mainly affect the end faces of the bearing.

Load size is another key factor to consider when selecting Insert Bearings. The larger the load, the more complex the material and design required for the bearing to ensure that it can withstand it without damage. Therefore, when selecting a bearing, it is necessary to ensure that the rated load capacity of the selected bearing is greater than or equal to the maximum load in the application.

2. Understand the load capacity of the bearing
The load capacity of a bearing is usually expressed by its rated load. The rated load is the maximum load that a bearing can withstand under specific conditions, which takes into account factors such as the bearing material, design, lubrication, and working environment. Common rated loads include basic rated dynamic load (Cr) and basic rated static load (Cor).

The basic rated dynamic load (Cr) refers to the maximum load that can be borne when the bearing reaches the predetermined fatigue life (usually 10^6 revolutions) between the rolling elements and the raceways inside the bearing when the bearing is subjected to pure radial or pure axial load. For bearings that are subjected to both radial and axial loads, the equivalent load needs to be calculated and then compared with the rated load of the bearing.

The basic rated static load (Cor) refers to the maximum load that does not cause plastic deformation or permanent deformation when the bearing is subjected to the maximum static load. Static load refers to the load that does not change or changes very little over a period of time.

3. Calculation of equivalent load
For bearings that are subjected to both radial and axial loads, the equivalent load needs to be calculated so that it can be compared with the rated load of the bearing. The calculation method of the equivalent load depends on the type of bearing and the application conditions.

For radial bearings (such as deep groove ball bearings, cylindrical roller bearings, etc.), radial equivalent dynamic load (Pr) or radial equivalent static load (P0r) is usually used to express it. These values ​​are obtained by combining radial load and axial load in a specific ratio.

For thrust bearings (such as thrust ball bearings, thrust roller bearings, etc.), the equivalent axial dynamic load (Pa) or equivalent axial static load (P0a) is used to express it.

When calculating the equivalent load, it is also necessary to consider the changes in the direction and size of the load, as well as the arrangement of the bearings (such as series, parallel, etc.).

4. Select bearings with sufficient load capacity
After understanding the type and size of the load in the application and the load capacity of the bearing, you can start to select bearings with sufficient load capacity. When selecting, make sure that the rated load of the selected bearing is greater than or equal to the maximum equivalent load in the application.

Other factors such as the precision, stiffness, friction coefficient, lubrication method, and working environment of the Insert Bearings need to be considered. These factors may affect the actual load capacity of the bearing, so they should also be considered when selecting.

5. Consider safety margin
In order to ensure the reliability and durability of the bearing, a certain safety margin is usually considered when selecting the bearing. The size of the safety margin depends on factors such as the importance of the application, the volatility of the load, and the manufacturing accuracy of the bearing.

Generally speaking, for critical applications or applications with large load fluctuations, bearings with larger safety margins should be selected, while for non-critical applications or applications with smaller load fluctuations, bearings with smaller safety margins can be selected.