The spindle is the primary heat source in the electrical spindle. If the heat generated is not expelled in time, it can cause the bearing to overheat, raising the temperature of the corresponding part of the lathe, leading to thermal deformation. In severe cases, it can cause the spindle and tailstock to be out of alignment. This not only affects the accuracy of the lathe itself and the processing precision but can also damage the bearings and even the spindle.

The causes of spindle overheating can be summarized as: too small bearing clearance on the spindle increases friction and frictional heat; prolonged full-load cutting reduces the rigidity of the spindle, causing it to bend, resulting in unstable transmission and heat generation. When addressing this issue, attention should be given to: adjusting the spindle bearing clearance to an appropriate size; controlling the supply of smooth oil to clear the oil path; and avoiding long-term load on the lathe as much as possible.

Choose a reasonable smoothing method. Oil, gas, and mist smoothing methods not only have a smoothing effect on the bearings but also offer certain cooling benefits.

2. New Material Selection: For instance, ceramic materials are used as rolling elements. Compared to steel ball angular contact ball bearings, ceramic ball bearings can reduce the rolling and sliding friction between balls and raceways, thereby decreasing heat generation.

3. Reduce the diameter of the roller. Decreasing the roller's diameter can reduce centripetal force and gyroscopic torque, thereby minimizing friction and heat generation.