It is well known that the sales, quality and quality of NSK bearings are among the top in the world. It has its professional assembly line, which has passed strict factory inspections in a series of procedures, and is sold all over the world to provide support for the world's industrial development. The quality of NSK bearings is the most important basis for winning market recognition, so from what aspects can the quality of NSK bearings be judged?

    1. The industrial design of the bearing is reasonable and perfect and has a world-class level, and the strong quality guarantees its service life. NSK bearing forging has to go through strict forging, bearing heat treatment, turning, grinding and bearing equipment and other rigorous procedures. Various processing procedures will affect the service life of the bearing. Among them, the quality of finished NSK bearings is directly related to the failure of NSK bearings. With the continuous advancement of scientific and technological testing, NSK bearing surface testing found that the grinding process of the metamorphic layer is closely related to the quality of the NSK bearing surface.

    2. The metal lottery used in NSK bearing manufacturing was once a major factor affecting bearing failure. Now with the continuous advancement of metallurgical technology, the extraction of raw materials has been greatly improved, and the quality of materials has also been greatly improved. The current quality of raw materials The factors in bearing failure have been significantly reduced, and this problem still exists at this stage.

    3. Whether the selection of materials for bearing manufacturing is qualified is also a factor that must be considered for bearing failure. In general NSK bearing failure detection is mainly based on a large number of Beijing materials, data analysis, failure environment, and forging process to find out NSK bearing failure The main factors are solved, which facilitates the continuous optimization, service life, and efficiency improvement of NSK bearings. Extend the service life of NSK bearings to avoid sudden early failure of bearings. Installation conditions are one of the most important factors in the use of factors. NSK bearings are often due to improper installation, resulting in changes in the stress state between the parts of the entire set of NSK bearings. NSK bearings operate under abnormal conditions and fail early. According to the technical requirements of NSK bearing installation, use, maintenance and maintenance, the load, speed, working temperature, vibration, noise and lubrication conditions of the bearing in operation are monitored and inspected. If an abnormality is found, the cause will be immediately found, adjusted, and the It returned to normal.
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    1. Tolerance control and selection of shaft and bearing room

    The authentic licensed NSK bearing should rotate flexibly after being pressed into the bearing without blocking the feeling. If there is obvious inflexible rotation, it means that the size of the shaft is too large. If the NSK bearing is pressed into the shaft when it is rotated by hand, there will be a slight vibration feeling, 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, the roundness must be controlled. Now most manufacturers in our country only control the tolerance and not the roundness.

    2. Prevent assembly of foreign objects

    When NSK bearings are installed on the rotor for dynamic balancing, it is easy to enter the iron filings generated during dynamic balancing into the NSK bearing, so it is best to perform dynamic balancing before installing the NSK bearing. For the convenience of assembly, some manufacturers apply some oil or grease in the bearing chamber for lubrication effect during assembly, but it is often difficult for the operator to control the amount. If the oil or grease accumulates in the NSK bearing chamber a lot, the NSK bearing rotates It is easy to enter the NSK bearing along the shaft. It is best not to apply oil or grease to the bearing room of NSK.

    3. About NSK bearing assembly method

    Because NSK bearings are high-precision products, improper assembly can easily cause damage to the NSK bearing raceway, resulting in damage to the NSK bearing. When assembling NSK bearings, there should be a special mold, which can not be knocked at will. When pressing into the shaft, only the small circle can be forced, and the large circle can only be forced. Air pressure or hydraulic pressure is required when assembling, and the upper and lower molds should be outside the horizontal state during press-fitting. If they are tilted, the NSK bearing channel will be damaged by force, which will cause the NSK bearing to produce noise.

    4. About preventing paint rust

    Paint rust frequently occurs when the sealed motor is assembled, and the sound is normal. The abnormal noise of the motor becomes very large after a long time. The NSK bearing is severely rusted when it is removed. In the past, many manufacturers would think it was the problem of NSK bearings. After our continuous publicity, now the motor factory has realized that the problem is mainly 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, and the NSK bearing grooves are corroded and the NSK bearing is damaged. At present, the problem can only be the selection of good insulating paint, which needs to be dried and then assembled.

    The life of NSK bearings is closely related to manufacturing, bearing quality, assembly, and use. Each link cannot be pulled down and must be done well, so as to ensure that the bearing is running in the best condition and improve work efficiency. To extend the service life of NSK bearings.