Causes and solutions for rolling bearing heating

The shaft parts of the machine tool, especially the main shaft, are generally assembled with rolling or plain bearings and rotate at a high speed, sometimes generating high heat. If this phenomenon is not eliminated in time, it will cause the bearing to overheat and cause the temperature of the corresponding part of the machine tool to rise and cause thermal deformation. In severe cases, the spindle and the tailstock will not be equal, which will not only affect the precision and machining accuracy of the machine itself, but also Burn the bearing. The causes of the spindle bearing heating and its troubleshooting methods are shown in Table 1.

Causes of rolling bearing heating and its elimination

(1) Reason: Low bearing accuracy Method: Select the bearing with the specified accuracy grade

(2) Reason: The spindle is bent or the hole of the box is not in the same way: repair the spindle or the box

(3) Reason: The belt is too tight: adjust the belt to make the tension appropriate

(4) Reason: Poor lubrication method: Select the lubricating material of the specified grade and clean it properly.

(5) Reason: Low assembly quality Method: Improve assembly quality

(6) Reason: The inner casing of the bearing runs the ring method: replace the bearing and related wear parts

(7) The axial force is too large. Method: cleaning and adjusting the gap of the sealing ring is required to be between 0.2 and 0.3 mm, correcting the balance hole diameter of the impeller and verifying the static balance value.

(8) Bearing damage method: replace the bearing

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