Often, an inspection of the bearing or bearing housing can determine the cause of the failure. Common causes of bearing failure are poor lubrication, incorrect assembly, incorrect selection of bearings, and inadequate understanding of the shaft and bearing chamber. The cause can also be determined by reviewing the operation of the bearing before it fails, analyzing the bearing lubrication and mounting condition, and carefully observing the failed bearings.

When a bearing is damaged during operation, it will lead to the failure of the entire machine or equipment. Once bearings fail prematurely or cause unexpected problems, it is important to be able to identify and predict failures before handling, so that corrective actions can be taken promptly. Therefore, it is advisable to avoid situations where bearing damage may occur.

Often, an inspection of the bearing or bearing housing can determine the cause of the failure. Common causes of bearing failure are poor lubrication, incorrect assembly, incorrect selection of bearings, and inadequate understanding of the shaft and bearing chamber. The cause can also be determined by reviewing the operation of the bearing before it fails, analyzing the bearing lubrication and mounting condition, and carefully observing the failed bearings.
In some cases bearings fail quickly, however these are different from fatigue failure due to flaking. Bearing failures are divided and classified into two categories: premature bearing failure and natural fatigue failure in the presence of metal.

2. Using bearings

2.1 Notes when handling bearings

Bearings are high-precision machine parts that must be handled with great care. In addition to ensuring smooth operation and expected life, bearings need to be used appropriately. Here are the main notes when handling bearings:

• Keep bearings and the area around them clean: dirt or dust that is not even visible to the naked eye has a harmful effect on bearings. Therefore, always keep the bearings and their surroundings clean to avoid the ingress of dirt.
• Be careful when handling bearings: strong vibrations during handling can scratch or damage the bearings. Strong impact may cause breakage or cracking.
• Use the right tools.
• Prevents Corrosion: Sweat from the handle or other dirt can cause bearing corrosion. It is therefore important to keep hands clean or wear gloves where possible when handling bearings.

2.2 Installation of bearings

Bearing installation affects accuracy, service life and future performance. It is recommended to install bearings according to the following steps:

• Clean bearings and surrounding components
• Check size and condition of related parts
• Follow the installation procedure
• Final check that the bearings are properly installed
• Provide the right type and amount of lubricant

Most bearings rotate on the same axis, so the mounting method is usually to fasten the shaft to the inner ring of the ball and have a clearance between the outer ring of the bearing and the housing hole.

2.3 Check in operation

After installing the bearings, it is important to run the operating test.

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