Thrust ball bearing installation stability maintenance problem solution

When inspecting the thrust ball bearings that have been removed during the regular inspection and operation of TIMKEN bearing equipment and the replacement of peripheral parts, it is necessary to determine in turn whether the secondary bearing parts can be reused and the usage is better. Also carefully investigate and record the removed bearings and appearance. In order to clarify and investigate the remaining amount of lubricant, the bearings should be cleaned well after sampling.
Next, check the raceway surface of the bearing, the condition of the rolling surface and the mating surface, and the wear state of the cage, etc., for damage and abnormality, especially to observe the running track of the raceway surface. To determine whether the bearing can be used again, it is necessary to consider the degree of damage to the thrust ball bearing, machine performance, importance, operating conditions, inspection cycle, etc.
If the bearing is found to be damaged or abnormal, please find out the cause according to the phenomenon of bearing damage and formulate countermeasures. In addition, the inspection results, if there are the following defects, TIMKEN bearings can no longer be used, need to replace the new bearings.
    When grease is added to anti-friction bearings, high pressure theory may not be required unless it is used with great care. High pressure can damage bearings and waste grease. Excessive grease can cause high temperatures and create an invisible environment around the bearings. In most applications, ball or roller bearings are fully lubricated if the grease level is between one-third and one-half of the bearing capacity. The excess will usually be wasted by the sealed casing.
1. Are all requirements for the installation surface and installation site?
If there is foreign matter such as iron filings, burrs, dust, etc. in the thrust ball bearing, the bearing will generate noise and vibration during operation, and even damage the raceway and rolling elements. Therefore, before installing the bearings, you must ensure that the mounting surface and the installation environment are clean.
2. Must the bearings be cleaned before installation?
The surface of the bearing is coated with anti-rust oil. You must clean it with clean gasoline or kerosene, and then apply it with clean high-quality or high-speed high-temperature grease.
The effect of cleanliness on TIMKEN bearing life and vibration noise is very large.
But we must remind you that the fully enclosed bearings do not need to be cleaned and refueled.
3. How to choose grease?
Lubrication has a very important influence on the operation and life of the bearing.
Here is a brief overview of the general principles for selecting grease. Grease is made of base oil, thickener and additives. The grease performance of different types and different grades varies greatly. The allowable rotation limit is different. Be careful when selecting.
The performance of the grease is primarily determined by the base oil.
Generally low viscosity base oil is suitable for low temperature and high speed; high viscosity is suitable for high temperature and high load.
The thickener is also related to the lubricating properties, and the water resistance of the thickener determines the water resistance of the grease.
In principle, the different greases of the brand cannot be mixed, and even the grease of the same thickener may have a bad influence on each other due to the different additives.
4. When lubricating the bearing, the more grease is applied, the better?
When lubricating a bearing, the more grease is applied, the better. This is a common misconception.
Excessive grease in the thrust ball bearing and bearing housing will cause excessive agitation of the grease, resulting in extremely high temperatures.
5. How to install and disassemble?
Do not directly hammer the end surface of the thrust ball bearing and the non-stress surface during installation. The bearing should be evenly stressed by the clamp, sleeve or other installation tools.
If the mounting surface is coated with oil, it will make the installation smoother.
If the interference is large, the bearing should be placed in mineral oil and heated to 90~100 °C and installed immediately. When disassembling is difficult, it is recommended that you use the disassembly tool to pull outward while carefully pouring hot oil onto the inner ring. The heat will cause the inner ring of the TIMKEN bearing to expand, making it easier to fall off.

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