Dealing with the high temperature problem of CNC lathe bearings requires a series of measures to ensure that the bearings can maintain an appropriate temperature range during operation. High temperatures can be caused by friction, insufficient lubrication, or other issues. Here are some suggested methods:

1. Lubrication: Ensuring that the bearings are adequately lubricated is key to lowering temperatures. Use appropriate grease or oil and regularly check the operation of the lubrication system. Make sure the bearings are well lubricated to reduce friction and heat generation.

2. Lubrication system inspection: Regularly inspect the lubrication system, including oil pumps, oil circuits, oil nozzles, etc. Ensure that lubricating oil or grease can flow smoothly to the bearings to prevent high temperature problems caused by insufficient lubrication.

3. Select appropriate lubricating materials: Select appropriate lubricating materials according to the working environment and bearing type. Some scenarios may require a grease or oil with better high temperature resistance.

4. Bearing selection: Make sure the selected bearing is suitable for the working conditions. Some special applications may require bearing materials that are resistant to high temperatures.

5. Check the bearing seal: The bearing seal structure is important to prevent contaminants from entering, maintain lubrication and reduce temperature. Ensure that the closed structure is intact, free of oil leakage and free of contamination.

6. Proper cleaning: Keep the work area clean to prevent impurities such as dust and cutting chips from entering the bearings. These impurities can cause friction and overheating.

7. Appropriate process parameters: Ensure that the process parameters of the CNC lathe are set correctly, including cutting speed, feed speed and cutting depth. Excessive cutting parameters can cause excessive friction and heat.

8. Cooling system: Use an appropriate cooling system to cool the critical components of your CNC lathe, including bearings. Coolant can effectively remove heat and lower the temperature.

9. Regular maintenance: Carry out regular bearing inspection and maintenance, including cleaning, lubrication and replacement of worn parts.

If high temperature problems persist despite the above measures, further fault diagnosis may be required, such as checking the condition of the bearings, whether there is abnormal friction, etc. In this case, it is best to ask professional maintenance personnel for further inspection and repair.