Bearing failure analysis is an important component of system engineering to improve the reliability of working surfaces. The phenomenon of bearing failure, which results in failure or non operation due to the specified loss of its working function, is called bearing failure. Bearing failure can be divided into two types: normal life failure and two early failures. This mainly focuses on the analysis of the causes of early failure of bearings caused by pitting corrosion and fatigue, and proposes improvement suggestions to improve the service life and reliability of rolling bearings.

The fatigue failure of rolling bearings is a surface form of failure, mainly manifested as the initiation, propagation, and fracture process of fatigue cracks, which have a long-term impact on the metal under alternating load faults. The rolling bearing uses a cage made of fiberglass reinforced nylon 66, suitable for stable working temperatures not exceeding 120 degrees. When using oil lubrication, if the oil contains additives, it may shorten the service life of the cage. When the temperature exceeds 120 degrees, aged lubricating oil will also shorten the lifespan of the cage. Therefore, attention should be paid to observing and replacing the lubricating oil as scheduled.

The sealed rolling bearings are lubricated with high-quality lithium based grease that has been specially tested. This type of grease can withstand high temperatures of 120 degrees Celsius for a short period of time. If the stable working temperature reaches 70 degrees or higher, the lifespan of standard lithium based grease will be shortened. To work frequently at high temperatures, special lubricating grease must be used, and attention should also be paid to whether heat-resistant materials are needed as sealing devices. The operating temperature of standard contact seals cannot exceed 110 degrees. If high-temperature synthetic materials are used for sealing, then it is also necessary to consider that this highly effective fluorinated material will emit harmful gases and smoke at temperatures exceeding 300 degrees Celsius. Especially when dismantling rolling bearings using a welding gun, this should be taken into account.

1. The load-bearing capacity of rolling bearings is much smaller than that of sliding bearings of the same volume, therefore, the radial size of their rolling bearings is larger. Therefore, sliding bearings are often used in situations that withstand large loads and require small radial dimensions and compact structures.

2. Bearing vibration and noise are significant, especially in the later stages of use., Therefore, in situations where precision bearings are highly required and vibration is not allowed, sliding bearings are generally preferred for better results.

3. Rolling bearings are particularly sensitive to foreign objects such as metal shavings. Once foreign objects are mixed in, they will produce intermittent large vibrations and noise, which can easily lead to damage. So the lifespan of rolling bearings also has a certain limit. In short, bearings similar to rolling bearings have a shorter lifespan than sliding bearings.