During grinding operations, intense heat is often generated at the contact area between the workpiece and the grinding wheel, which leads to a sudden increase in temperature in this area. According to theoretical analysis and actual measurement of heat conduction, this instantaneous temperature may reach 1000 to 1500 degrees Celsius. This extreme high temperature will have various effects on the surface of the workpiece, such as the formation of oxide layers, the generation of amorphous structures, high-temperature tempering and secondary quenching, etc., thus affecting the performance of the bearings.

Formation of oxide layer: When the surface of the workpiece reaches a high temperature in an instant, it reacts with oxygen in the air to form a very thin layer of iron oxide, with a thickness of about 20 to 30 nanometers. The thickness of this oxide film is closely related to the quality of grinding and is an important indicator of the grinding process. Amorphous tissue layer: Under high temperature conditions, the surface of the workpiece will melt and form a very thin layer of amorphous tissue after cooling, with a thickness of about 10 nanometers. Although this layer of tissue has high hardness and toughness, it is easily removed during precision grinding. High temperature tempering layer: Due to the effect of instantaneous high temperature, the temperature within a certain depth range of the workpiece surface will rise above its tempering temperature. When the austenitizing temperature is not reached, high-temperature tempering structural changes corresponding to the heating temperature will occur layer by layer, resulting in a reduction in hardness. The higher the heating temperature, the more obvious the hardness decreases.

To deal with the heating problem of BOWER bearings, the following are some effective solutions:

Select BOWER bearings that meet the specified accuracy level to improve the accuracy of the bearing. Repair the spindle or box body to eliminate the problem of bent spindle or non-concentric box hole. Reasonably adjust the tightness of the belt to avoid excessive tension. Use designated brands of lubricating materials and keep them clean to ensure good lubrication. Improve assembly quality and ensure bearings are installed correctly. Replace bearings and other worn parts to prevent the inner and outer shell of the bearing from circling. Clean and adjust the gap of the seal ring to keep it between 0.2 and 0.3 mm. At the same time, adjust the diameter of the impeller balance hole and verify the static balance value to reduce the axial force. If the bearing is found to be damaged, the BOWER bearing should be replaced in time.

By taking the above measures, the heating problem of BOWER bearings can be effectively solved and ensure their normal operation.