What problems should I pay attention to when using FAG imported bearings?

Bearings are precision parts, so they require a very cautious attitude when using them. That is, they use high-performance FAG bearings. If they are not used properly, they will not achieve the expected performance and will easily damage the bearings.
First, the following matters should be noted when using bearings:
1. Keep the bearings and their surroundings clean
Even if the smiling dust that is invisible to the naked eye enters the bearing, it will increase the wear, vibration and noise of the bearing.
2, use the installation carefully
Strong stamping is not allowed. It is not allowed to directly hit the bearing with a hammer. It is not allowed to transmit pressure through the rolling elements.
3, use appropriate and accurate installation tools
Try to use special tools and try to avoid using cloth and short fibers.
4, to prevent bearing corrosion
When taking the bearing directly by hand, wash off the sweat on your hands and apply high-quality mineral oil before handling. Pay special attention to rust prevention during the rainy season and summer.
However, under certain special operating conditions, FAG bearings can achieve longer life than traditional calculations, especially at light loads. These special operating conditions are when the rolling surfaces (tracks and rolling elements) are effectively separated by a lubricant film and the surface damage caused by contaminants is limited. In fact, under ideal conditions, so-called permanent bearing life is possible.
Second, bearing life:
The life of a rolling bearing is defined by the number of revolutions (or the number of hours of operation at a certain speed). Bearings within this life are subject to initial fatigue damage (flaking or missing) on ​​any of their bearing rings or rolling elements. However, whether in the laboratory test or in actual use, it can be clearly seen that the same bearing under the same working conditions has a different actual life. In addition, there are several different definitions of FAG imported bearings "life", one of which is the so-called "working life", which means that the actual life that a bearing can reach before it is damaged is caused by wear and damage, usually not caused by fatigue. It is caused by wear, corrosion, seal damage and other reasons.
Third, the causes and countermeasures of bearing damage:
(1) Why is the bearing worn and damaged?
Only some of the bearings are damaged in practical applications.
Most of the bearings are damaged for many reasons - beyond the original estimated load, non-effective seals, too tight bearing clearance caused by too small bearing clearance. Any of these factors have their particular type of damage and leave a special mark of damage. Therefore, inspecting the bearing of the damaged shaft, in many cases, its possible cause can be found. In general, one-third of the bearing damage is caused by fatigue damage, and the other third is caused by poor lubrication. The other third is due to contaminants entering the bearing or improperly installed.
However, these types of damage are also related to industry. For example, most of the pulp and paper industry is due to poor lubrication or contamination resulting in bearing damage rather than material fatigue.

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Analysis of the causes of joint bearing life from the analysis of the use factors

The use factors mainly refer to whether the installation adjustment, use and maintenance, maintenance and repair, etc. meet the technical requirements. According to the technical requirements for the installation, use, maintenance and maintenance of the joint bearing, monitor and check the load, speed, working temperature, vibration, noise and lubrication conditions of the bearing in operation, find out the cause and immediately adjust the cause and make adjustments. It returned to normal. The installation condition is one of the primary factors in the use factor. The bearing is often changed due to improper installation, and the force state between the parts of the whole bearing changes. The bearing runs under abnormal conditions and ends the service life early.
The internal factors mainly refer to the three factors that determine the quality of the bearing, such as structural design, manufacturing process and material quality.
The metallurgical quality of joint bearing materials used to be a major factor affecting the early failure of rolling bearings. With the advancement of metallurgical technologies (such as vacuum degassing of bearing steels), the quality of raw materials has improved. The proportion of raw material quality factors in bearing failure analysis has dropped significantly, but it is still one of the main factors affecting bearing failure. The proper selection of materials is still a factor that must be considered in bearing failure analysis.
Bearings are generally manufactured through multiple processes such as forging, heat treatment, turning, grinding and assembly. The rationality, advancement and stability of each processing technology will also affect the life of the bearing. The heat treatment and grinding processes that affect the quality of the finished joint bearing often have a more direct relationship with the failure of the bearing. In recent years, research on the metamorphic layer of bearing working surface shows that the grinding process is closely related to the bearing surface quality.
The main task of joint bearing life 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 in a targeted manner, prolong the service life of bearings and avoid bearing protrusion. Early failure of the hair.
First, disassembly
  1. First loosen the locking screw on the eccentric sleeve of the bearing with an Allen key, then insert the small iron rod into the counterbore on the eccentric sleeve of the top cover, and loosen the eccentric sleeve against the direction of rotation of the shaft.
  2. Loosen the bolts that secure the bearing housing. Remove the bearing from the shaft together with the housing. Note before removing the bearing housing at one end of the shaft. The bearing block bolts at the other end of the shaft should be loosened to prevent the bearings at both ends from being damaged by each other.

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