Precautions when using deep groove ball bearings

1. Selection and control of tolerances of shaft and deep groove ball bearing chambers: Deep groove ball bearings should be rotated and flexed without resistance when pressed into deep groove ball bearings. If the obvious rotation is not flexible, it indicates that the size of the shaft is too large and the tolerance is lowered. For example, if the deep groove ball bearing is pressed into the shaft and rotated by hand, there is obvious rustiness, which may be that the tolerance of the shaft is too large or the roundness of the shaft is not good. Therefore, it is necessary to control the roundness when controlling the tolerance of the shaft and deep groove ball bearing chamber. At present, many domestic manufacturers only control the tolerance and do not control the roundness.

2, the assembly method of deep groove ball bearings: Because deep groove ball bearings are high-precision products, such as improper assembly can easily damage the channel of deep groove ball bearings, resulting in damage to deep groove ball bearings. Deep groove ball bearings should have a special mold when assembling, and can not be beaten at will. When pressing the shaft, only a small circle is required to force. When the large circle is pressed, only a large circle of force is applied. Air pressure or hydraulic pressure is required for assembly. The upper and lower molds should be outside the horizontal state during press-fit. If tilted, the deep groove ball bearing channel will be damaged due to the force, which will cause the deep groove ball bearing to produce a sound.

3. Prevention of assembly of foreign objects: Deep groove ball bearings are easy to move the iron filings generated during dynamic balance into the deep groove ball bearings when they are mounted on the rotor. Therefore, it is better to install the balance before installing the deep groove ball bearings. . In order to facilitate assembly, some manufacturers apply some oil or grease to the deep groove ball bearing chamber for lubrication. However, it is often difficult for the operator to control the amount if the oil or grease accumulates in the deep groove ball bearing room. It is easy to enter the inside of the deep groove ball bearing along the shaft when the deep groove ball bearing rotates. It is best not to apply oil or grease to the deep groove ball bearing chamber. If it is not coated, it must be controlled not to accumulate in the deep groove ball bearing chamber.

4. Prevention of paint rust: The characteristic of paint rust is that it is mostly in the sealed motor. The sound of the motor is very good when it is assembled. However, after some time is put in the warehouse, the abnormal noise of the motor becomes very large, and the deep groove is removed. Ball bearings have severe rust. In the past, many manufacturers considered it to be a problem of deep groove ball bearings. After our constant publicity, the motor factory has now realized that it is mainly a problem of insulating varnish. This problem is mainly caused by the fact that the acidic substance volatilized by the insulating paint forms corrosive substances under a certain temperature and humidity, and the deep groove ball bearing channel is corroded, resulting in damage of the deep groove ball bearing. The problem can only be achieved by selecting a good insulating varnish and ventilating it for a period of time after drying.