Reasons for damage to imported bearings

First, improper installation (about 16%)

1. Use brute force during installation. Directly hitting the bearing with a hammer will cause the greatest damage to the imported bearing; it is the main cause of deformation.

2, the installation is not in place, the installation is biased or not installed in the imported bearing position, resulting in too small clearance of the imported bearings. The inner and outer rings are not in the center of uniform rotation, causing disagreement.

Recommendation: Select an appropriate or professional imported bearing installation tool, and use a special instrument to detect it after installation.

Second, poor lubrication (about 36%)

According to the survey, poor lubrication is one of the main causes of premature failure of imported bearings. The main reasons include: not adding lubricant or lubricating oil in time; lubricant or lubricating oil is not filled in place; improper selection of lubricant or lubricating oil; inaccurate lubrication method, etc.

Recommendation: Choose an accurate lubricant or lubricant and use an accurate lubrication method.

Third, pollution (about 14%)

Pollution can also lead to premature damage to imported bearings. Contamination means that dust, metal chips, etc. enter the inside of the imported bearings. The main reasons include: opening the imported bearing packaging too early before use, causing pollution; the working environment is not clean during installation, causing pollution; the working environment of the imported bearings is not clean, and the working medium is polluted.

Recommendation: It is best not to disassemble the packaging of the imported bearings before use; keep the installation environment clean during installation, clean the imported bearings to be used; and strengthen the sealing device of the imported bearings.

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Low noise FAG bearing selection

(1) Dynamic FAG bearing with low noise requirements

In the FAG bearing produced in China, the department has a low-noise variety of FAG bearings for FAG bearings and FAG bearings. Among them, the ball FAG bearing has several varieties with Zl, Z2 and Z3 suffixes from the inner diameter φ2.5mm to φ60mm, which respectively correspond to three different low noise requirements, and the roller FAG bearing has eight types from N309 to N322. Models are also available in low noise scales.

These FAG bearings can be used in other machines with low noise requirements and are inexpensive, as is the type and size of the two types of low noise FAG bearings.

(2) FAG bearings with relatively small noise

When the above two types of low noise FAG bearings cannot be used, FAG bearings with relatively low noise can be used. The detailed comparison is based on the following:

1) The noise of the ball FAG bearing is lower than that of the roller bearing, and the (friction) noise of the FAG bearing with less relative sliding is lower than that of the FAG bearing with relatively relatively sliding;

2) The noise of the FAG bearing using the solid cage is relatively lower than that of the FAG bearing using the stamped cage; the noise of the FAG bearing using the plastic cage is lower than that of the FAG bearing using the above two cages; Thick, less noisy,

3) FAG bearings with high precision, especially FAG bearings with higher precision of moving body, have lower noise than low-precision FAG bearings.

4) The noise of small FAG bearings is relatively small compared to that of large FAG bearings.

For example, the noise of a radial ball bearing is smaller than that of a short cylindrical roller bearing, and the noise of a short cylindrical roller bearing is smaller than that of a tapered roller bearing.

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