The internal factors mainly refer to the three major factors that determine the quality of TIMKEN imported bearings, such as structural design, manufacturing technology and material quality.

    First of all, if the structural design is reasonable and advanced, it will have a longer life of TIMKEN imported bearings. The manufacture of bearings generally involves multiple processing procedures such as forging, heat treatment, turning, grinding and assembly. The rationality, advancement and stability of each processing technology will also affect the life of TIMKEN imported bearings. Among them, the heat treatment and grinding processes that affect the quality of the finished TIMKEN imported bearings are often more directly related to the failure of the bearing. In recent years, the research on the deteriorating layer of the bearing working surface shows that the grinding process is closely related to the surface quality of TIMKEN imported bearings.

    The metallurgical quality of TIMKEN imported bearing materials used to be the main factor affecting the early failure of rolling TIMKEN imported bearings. With the progress of metallurgical technology (such as vacuum degassing of bearing steel, etc.), the quality of raw materials has been improved. The proportion of raw material quality factors in the failure analysis of TIMKEN imported bearings has dropped significantly, but it is still one of the main factors affecting the failure of TIMKEN imported bearings. The selection of materials is still a factor that must be considered in bearing failure analysis.

    The main task of TIMKEN imported bearing failure analysis is to find out the main factors causing bearing failure based on a large number of background materials, analysis data and failure modes, so as to propose improvement measures to extend the service period of TIMKEN imported bearings and avoid TIMKEN Sudden early failure of imported bearings.

　　For sealed TIMKEN imported bearings, they have been filled with appropriate grease during production; for bearings, a sealing device is also installed in the host to prevent grease leakage.
Eric Bearing Limited provides TIMKEN Bearing 30313 J2/Q.

    There is a question of how much grease should be injected into TIMKEN imported bearings. If the amount of grease is too small, it is easy to cause lack of grease or dry friction and affect the life. Too much grease will cause a large amount of grease leakage, which will pollute the environment and cause waste. It can be seen that the amount of grease injected into TIMKEN imported bearings is as small as possible under the premise of ensuring sufficient lubrication of TIMKEN imported bearings.

    Advantages and disadvantages of grease lubrication Under normal working conditions, most TIMKEN imported bearings can be used in grease lubrication.

    The advantage of grease is that it is easier to retain in the TIMKEN imported bearing configuration, especially in applications where the vertical axis or the axis is inclined to a certain angle. Lubricating grease also has the function of sealing, which can prevent the influence of pollutants, humidity or moisture on TIMKEN imported bearings. However, if the grease is excessive, the operating temperature of the bearing will rise, especially in high-speed applications. In most cases, only at the beginning stage can the imported TIMKEN bearing be completely filled with grease, while the imported TIMKEN bearing housing is filled with only an appropriate amount of grease and a certain amount of free space is left. Before the working speed is fully reached, the excess grease must be discharged out of the bearing during the running-in phase, so that the appropriate amount of grease remains in the TIMKEN imported bearing. When the working temperature drops significantly, it means that the grease has run-in with the bearing and is evenly distributed in the TIMKEN imported bearing configuration.

    When TIMKEN bearings are used on site, their work load is often greater than their corresponding fatigue durability limit load. After a certain period of work, or later or sooner or later, it will be fatigued and peeled due to its own data reaching the fatigue limit and cannot continue to be used. Even if the working load of certain TIMKEN bearings is lower than the corresponding durability limit load, wear failure will occur due to the difficult to eradicate bearing contamination problem. In short, the bearings in field use more or less can not fully meet the conditions that the above-mentioned laboratory has, and a slight lack of any of these conditions will shorten the useful life of the bearing, which causes the life problem of the bearing.

    According to the latest rolling bearing fatigue life theory, a TIMKEN bearing with excellent design, outstanding material, well-manufactured and correct installation, as long as it accepts the load easily (not greater than a certain durability limit load value corresponding to the bearing), then The material of this bearing will never produce fatigue damage. Therefore, as long as the working environment temperature of the bearing is suitable and the range of change is small, there is absolutely no solid dust, harmful gas and moisture intruding into the bearing, the bearing is smooth and appropriate, and the smoothing agent is absolutely pure and free of impurities, and will not aging. Then the bearing will run indefinitely.

    There are many failure modes of TIMKEN bearings, but most of them have no available life calculation methods so far. As long as the fatigue life, wear life, smooth life and fretting life can be quantitatively evaluated by calculation methods.