Selection of bearing type

When selecting a INA bearing type, it is essential to fully understand the operating conditions of the bearing. The following table lists the main analysis items:

1) Bearing installation space

Bearing type that can be accommodated in the bearing installation space Since the rigidity and strength of the shaft are emphasized when designing the shaft system, the shaft diameter, which is the inner diameter of the bearing, is generally determined first. However, there are many size series and types of rolling bearings, and the most suitable bearing type should be selected from them.

2) Load

The size, direction and nature of the bearing load [The load capacity of the bearing is expressed by the basic load rating, and its value is shown in the bearing size table] The bearing load is rich in changes, such as the size of the load, whether there is only a radial load, and the axial load is unidirectional Or the two-way, the degree of vibration or shock, and so on. After considering these factors, choose the most suitable bearing type.

Generally speaking, the radial load capacity of bearings with the same inner diameter increases in the following order: deep groove ball bearings <angular contact ball bearings <cylindrical roller bearings <tapered roller bearings <self-aligning roller bearings

3) Rotation speed

Bearing type that can adapt to the mechanical speed [The limit value of the bearing speed is expressed as the limit speed, and the value is shown in the bearing size table] The limit speed of the bearing is not only taken from the bearing type but also limited to the bearing size, cage type, accuracy grade, and load conditions And lubrication methods, etc., therefore, these factors must be considered when choosing. The following bearings are mostly used for high-speed rotation: deep groove ball bearings, angular contact ball bearings, cylindrical roller bearings.

4) Rotation accuracy

Bearing type with the required rotation accuracy [The dimensional accuracy and rotation accuracy of the bearing have been standardized by GB according to the bearing type] Machine tool spindles, gas turbines and control machines require high rotation accuracy, high speed and low friction, respectively. 5 should be used in this case Bearings above grade accuracy. The following bearings are generally used: deep groove ball bearings, contact ball bearings, and cylindrical roller bearings.