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What should be paid attention to when using IKO thrust cylindrical roller bearings

by:JNSN     2022-10-02
1. Selection and control of shaft and bearing chamber tolerances After the iko bearing is pressed into the bearing, it should rotate flexibly without any sense of blockage. If the rotation is obviously inflexible, it indicates that the size of the shaft is too large and the tolerance should be reduced. If the thrust cylindrical roller bearing is pressed into the shaft and has an obvious 'sand' feeling after being rotated by hand, 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 the shaft and the bearing chamber, it is necessary to control the roundness. At present, many domestic manufacturers only control the tolerance and do not control the roundness. 2. The assembly method of the bearing Because the iko bearing is a high-precision product, it is easy to damage the bearing channel if it is improperly assembled, resulting in damage to the bearing. The thrust cylindrical roller bearing should have a special mold when assembling, and cannot be beaten at will. When pressing into the shaft, only a small circle can be stressed, and when a large circle is pressed, only a large circle can be stressed. When assembling, it is required to use air pressure or hydraulic pressure. When pressing, the upper and lower molds should be out of the horizontal state. If it is inclined, the bearing channel will be damaged due to force, which will cause the bearing to generate noise. 3. To prevent foreign objects from being assembled, when the bearing is installed on the rotor for dynamic balancing, it is easy for the iron filings generated during dynamic balancing to enter the inside of the iko bearing, so it is best to do dynamic balancing before installing the bearing. For the convenience of assembly, some manufacturers apply some oil or grease in the bearing chamber to achieve lubrication effect, but it is often difficult for operators to control the amount. If the oil or grease accumulates in the bearing chamber, the thrust cylindrical roller When the bearing rotates, it is easy to enter the inside of the bearing along the shaft. It is best not to apply oil or grease in the bearing chamber. 4. The feature of paint rust prevention is that it is mostly in the sealed motor. The sound of the motor is very good during assembly, but after being placed in the warehouse for some time, the abnormal noise of the motor becomes very large, and the iko bearing is removed. Severe rusting. In the past, many manufacturers thought it was the problem of thrust cylindrical roller bearings. After our continuous publicity, now the motor factory has realized that it is mainly the problem of insulating paint. This problem is mainly because the acidic substances volatilized from the insulating paint form corrosive substances under a certain temperature and humidity, which corrode the bearing grooves and cause bearing damage. At present, the problem can only be to choose a good insulating paint, and assemble it after drying and ventilating for a period of time.
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