The main manifestations of oil leakage in CNC vertical lathes can be attributed to the following aspects:

1. Oil leakage from the fuel tank or pipeline: This is the most direct manifestation of oil leakage in CNC vertical lathes. It may be caused by lax sealing of the fuel tank, aging pipelines or loose connections. Once oil leakage occurs in the CNC vertical lathe's fuel tank or pipeline, it will not only cause a waste of CNC vertical lathe oil, but may also affect the normal operation of the equipment and even cause safety issues.

2. Oil leakage at the hydraulic cylinder or bearing: The hydraulic cylinder and bearing of the CNC vertical lathe are key moving parts. If oil leakage occurs in these parts, it may be caused by seal wear, improper installation, or external impact. This kind of oil leakage in CNC vertical lathes will not only affect the performance of the equipment, but may also have a negative impact on the machining accuracy.

3. Oil stains on the surface of the machine tool: If there are unknown oil stains on the surface of the machine tool, it may be caused by internal oil leakage. This situation may be due to the deterioration of the sealing performance of the internal components of the machine tool, or the oil splashing out due to vibration, impact, etc. during the flow process.

4. Oil level drops: The oil level of the CNC vertical lathe should be maintained within a certain range. If the oil level drops suddenly and no obvious external oil leakage points are found, there may be internal oil leakage. This condition may be due to a damaged seal inside the tank or oil leaking into other components.

5. Oil contamination: If there are impurities or abnormal color in the oil of CNC vertical lathe, it may be due to oil leakage that causes external pollutants to enter the oil system. This kind of contamination of CNC vertical lathes will not only affect the performance of the oil, but may also cause wear and tear on the moving parts of the equipment.

It should be noted that the reasons for oil leakage of CNC vertical lathes may be various. It may be caused by design or manufacturing defects of the equipment itself, or it may be caused by improper operation or maintenance during use. Therefore, when oil leakage occurs, timely inspection and repair should be carried out to avoid greater damage to the equipment. At the same time, regular maintenance and upkeep of CNC vertical lathes is also an effective measure to prevent oil leakage.