Precautions for use of deep groove ball bearing

Selection and control of tolerance of shaft and deep groove ball bearing chamber

the deep groove ball bearing shall rotate flexibly without blocking feeling after being pressed into the deep groove ball bearing. If there is obvious inflexible rotation, it indicates that the size of the shaft is too large and the tolerance should be reduced. If the deep groove ball bearing rotates by hand after being pressed into the bearing, it may be that the tolerance of the shaft is too large or the roundness of the shaft is not good. Therefore, when controlling the tolerance of shaft and deep groove ball bearing chamber, it is also necessary to control the roundness. At present, many domestic manufacturers only control the tolerance and do not control the roundness.

Assembly method of deep groove ball bearing

Because deep groove ball bearing is a high-precision product, if it is improperly assembled, it is easy to damage the groove of deep groove ball bearing, resulting in damage to deep groove ball bearing. The deep groove ball bearing shall be equipped with a special mold during assembly, and can not be knocked at will. When pressing the shaft, only the small ring can be stressed, and when pressing the large ring, only the large ring can be stressed. Pneumatic or hydraulic pressure is required during assembly. During press assembly, the upper and lower dies shall be outside the horizontal state. If there is inclination, the groove of deep groove ball bearing will be damaged due to stress, resulting in conduction sound of deep groove ball bearing.

Prevention of assembly foreign matters

when the deep groove ball bearing is installed on the rotor for dynamic balance, it is easy to enter the iron filings generated during dynamic balance into the deep groove ball bearing, so it is best to perform dynamic balance before installing the deep groove ball bearing. In order to facilitate assembly, some manufacturers apply some oil or grease in the deep groove ball bearing chamber for lubrication effect during assembly, but it is often difficult for the operator to control the amount. If more oil or grease is accumulated in the deep groove ball bearing chamber, it is easy to enter the deep groove ball bearing along the shaft when the deep groove ball bearing rotates. It is better not to apply oil or grease to the deep groove ball bearing chamber. If it is necessary to apply, it shall be controlled and there shall be no accumulation in the deep groove ball bearing chamber.

Prevention of paint rust

Paint rust is often found in sealed motors. The sound of the motor is very good during assembly, but after it has been put in the warehouse for some time, the abnormal sound of the motor becomes very large, and there is serious rust when removing the deep groove ball bearing. In the past, many manufacturers thought it was the problem of deep groove ball bearings. After our continuous publicity, the motor factory has realized that the main problem is the insulating paint. This problem is mainly because the acidic substances volatilized from the insulating paint form corrosive substances at a certain temperature and humidity, which corrodes the channel of the deep groove ball bearing and leads to the damage of the deep groove ball bearing. At present, only good insulating paint can be selected and assembled after drying and ventilation for a period of time.

The service life of deep groove ball bearing is closely related to manufacturing, assembly and use. It must be done well in each link in order to make the deep groove ball bearing in the best operation state, so as to prolong the service life of deep groove ball bearing.