Debugging and measurement of bearing usage

During use, it is necessary to regularly monitor the basic external conditions of bearing operation, such as temperature, vibration, and noise measurement. These regular inspections will detect potential problems early and prevent unexpected machine shutdowns, enabling production plans to be realized and improving factory productivity and efficiency.  

During operation, bearings require proper re lubrication to achieve perfect performance. The lubrication methods for micro bearings are divided into grease lubrication and oil lubrication. In order for bearings to function well, the first step is to choose a lubrication method that is suitable for the usage conditions and purposes. If only lubrication is considered, the lubricity of oil lubrication has the advantage. However, grease lubrication has the advantage of simplifying the structure around the bearing.  

The accuracy level of bearings increases sequentially from level 0. For general use, level 0 is sufficient, but for the conditions or occasions shown in Table 1, level 5 or higher accuracy is required.

Although the above accuracy levels are based on ISO standards, their names vary among different countries' standards.

Listed the accuracy levels applicable to various bearing types and compared them with national standards.

Dimensional accuracy (related to shaft and housing installation)

1. Allowable deviations for inner diameter, outer diameter, width, and assembly width

2. Allowable deviation of the inner and outer diameters of the roller group

3. Allowable limit values for chamfer dimensions

4. Allowable variation in width

Rotation accuracy (related to the jumping of the rotating body)

1. Allowable radial and axial runout of inner and outer rings

2. Allow lateral jumping of the inner circle

3. Allowable variation of inclination of outer diameter surface

4. Allowable variation in thickness of thrust bearing raceway

There are many dimensions of standard bearings, so it is better to use standard bearings in the design of mechanical devices (this design concerns whether the bearings are easy to purchase, so let's just say something else. Some types of bearings do exist in the catalog, but some non-standard bearings are not available in Chinese Mainland, and sometimes the future will take a long time, so the time cost and the cost of later replacement should be considered when selecting bearings). The nature, size, and direction of the loads imposed on bearings are variable. Usually, the rated basic load is displayed on the size chart. However, axial and radial loads are also important factors in selecting suitable bearings. When the size of ball and needle roller bearings is equivalent, needle roller bearings usually have higher load capacity and can withstand larger vibration and impact loads.