Bearing Damage Conditions and Causes
Source: China Bearing Network | Time: 2013-01-16
Bearing damage can occur under various circumstances, even when the bearing is used properly. Normally, a bearing should last until the end of its fatigue life. However, in some cases, it may suffer from premature failure due to improper usage or external factors. These unexpected damages are often referred to as faults or incidents, which happen before the bearing reaches its expected service life.
Several factors can contribute to early bearing damage. Poor lubrication is one of the most common causes. If the lubricant is insufficient or not suitable for the application, it can lead to excessive friction and heat, ultimately causing wear and tear. Additionally, issues with the oil supply system, such as incorrect design or blockage, can also affect performance.
Foreign matter entering the bearing is another major cause of damage. Dust, dirt, or other contaminants can get trapped between the rolling elements and raceways, leading to scratches, pitting, or even complete failure. Misalignment during installation or shaft deflection can also result in uneven load distribution, increasing stress on certain parts of the bearing.
Thermal expansion of the shaft or housing is another critical factor that's often overlooked. If the temperature changes are not properly accounted for during the design or installation phase, it can cause deformation, misalignment, or increased internal clearance, all of which can shorten the bearing’s lifespan.
To effectively diagnose the root cause of a bearing failure, it's important to consider not only the condition of the bearing itself but also the operating environment, the surrounding structure, and any changes that occurred before and after the incident. By analyzing these factors together, engineers can identify potential issues and take preventive measures to avoid similar failures in the future.
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The service life of aluminum sliding windows is affected by many factors:
1. Material quality
Aluminum alloy profiles
If high-quality aluminum alloy profiles are used, the wall thickness meets the standard and the alloy composition is excellent, its service life can reach 30-50 years or even longer. For example, some high-quality aluminum alloy profiles such as 6063-T5 have strong corrosion resistance and deformation resistance.
Hardware accessories
Hardware accessories such as pulleys, handles, locks, etc. have a greater impact on the overall life. Good quality stainless steel or copper hardware accessories can be used for 10-20 years under normal use. Cheap and low-quality hardware may be damaged in 5-10 years, such as pulley wear leading to poor sliding and pulling.
2. Use environment
Climatic conditions
In dry and mild climates, aluminum sliding windows have a longer service life. However, if they are located in coastal areas, high humidity and high salt air will accelerate the corrosion of aluminum alloys, which may shorten the service life to about 20-30 years; in areas with more acid rain, it will also cause erosion on its surface.
Daily maintenance
Regular cleaning, maintenance, and timely replacement of aging parts of aluminum sliding windows will greatly extend their service life. On the contrary, if there is a long-term lack of maintenance, the life of the window may be reduced by 5-10 years.
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