CNC machine tools are high-precision automated machine tools whose performance and accuracy are crucial to production and processing. In order to ensure the stable operation and processing accuracy of CNC machine tools, the following parts should be protected:

1. Spindle bearing: Spindle bearing is one of the core components of CNC machine tools. It carries the rotational motion of the spindle. In order to ensure the life and accuracy of spindle bearings, regular inspection, lubrication and cleaning are required.

2. Guide rail: The guide rail is an important guiding component of the CNC machine tool. It controls the feed and position of the tool. In order to protect the accuracy of the guide rail and extend its life, regular cleaning, lubrication and inspection are required.

3. Lead screw: The lead screw is one of the transmission components of CNC machine tools. It controls the feed speed and position of the tool. In order to protect the accuracy of the screw and extend its life, regular cleaning, lubrication and inspection are required.

4. Electrical components: The electrical components of CNC machine tools control various movements and functions of the machine tool. In order to ensure the normal operation and stability of CNC machine tools, it is necessary to regularly check the connection, insulation and heat dissipation of electrical appliances.

5. Hydraulic system: For CNC machine tools using a hydraulic system, the normal operation of the hydraulic system has a great impact on the performance and accuracy of the machine tool. In order to ensure the stable operation of the hydraulic system, it is necessary to regularly check the cleanliness of the hydraulic oil and the working status of the hydraulic components.

In short, in order to ensure the stable operation and processing accuracy of CNC machine tools, it is necessary to focus on protecting key components such as spindle bearings, guide rails, screws, electrical components and hydraulic systems of machine tools. At the same time, operators also need to pay attention to care and maintenance during daily use to avoid unnecessary damage to CNC machine tools.