The following maintenance items should be paid attention to when engraving the spindle of the engraving machine:

1. The oil and water pipes must be connected before starting the machine. The electric spindle must be connected to the oil and water pipes before starting the 

spindle motor. The water and oil pipes must not be connected incorrectly during installation. There are water pipes on the left and right sides of the spindle and 

an oil pipe in the middle (the spindle of CNC drilling and milling machines is lubricated with grease, so the above method is not used;

2. When using the electric spindle, the oil mist pipe point should be connected first, and the pipe joint should be cleaned to prevent dirt from entering and causing 

the bearing to burn. During operation, the electric spindle should be started only after a slight amount of oil mist leaks from the front end of the electric spindle. 

It is recommended to use No. 5 spindle oil for oil mist lubrication. The oil inlet pipe is 20-30 drops/min. Check frequently and do not cut off the oil, otherwise it 

will Cause damage to the spindle ring;

3. During operation, the oil mist must be turned off only after the spindle has completely stopped rotating, so as to extend the service life, which means that 

startup should not be too frequent;

4. Before using the electric spindle, you must check whether the grinding wheel adapter is coaxial. If it is out of alignment by more than 0.03 mm, the grinding 

wheel adapter should be returned. Otherwise, the electric spindle will be damaged and the grinding will not work well. When grinding, be careful not to hit it 

and correct it. Then go in and grind.