There may be many reasons for oil leakage during precision CNC lathe machining. Here are some common reasons that may cause oil leakage:

1. Damaged seals: If the seals in the oil lubrication system of CNC lathes, such as oil seals, O-rings, etc., are damaged or worn, oil will leak from the seals. Regular inspection and replacement of seals are important steps in preventing oil leaks.

2. Loose oil pipe connection: If the oil pipe connection part in the CNC lathe oil transmission system is loose or not installed correctly, it may cause oil leakage. Regularly checking the oil pipe connections to ensure they are well tightened is an effective means to prevent oil leakage.

3. Oil pipe wear: Long-term friction and vibration of the CNC lathe oil pipe may cause wear of the oil pipe, thereby forming a path for oil leakage. Regularly checking the wear and tear of oil pipes and promptly replacing aging oil pipes is one of the measures to prevent oil leakage.

4. Oil tank sealing problem: The CNC lathe oil tank is where lubricating oil is stored. If the oil tank is not well sealed or damaged, it will cause oil to overflow. Check the sealing of the fuel tank and repair or replace damaged parts in time.

5. Oil pump failure: The CNC lathe oil pump is a key component that promotes the flow of oil. If the oil pump fails, such as leaking or not working, it may cause abnormal oil flow or even oil leakage. Regular inspection and maintenance of your oil pump are important steps in preventing such problems.

6. Excessive oil filling: Excessive oil filling of CNC lathes may cause excessive accumulation of oil in the system, exceeding the system's capacity, causing oil leakage. Following the manufacturer's recommendations for the correct amount of oil is key to preventing problems like this.

7. Oil pollution: Oil pollution in CNC lathes will increase friction in the system and accelerate the wear of parts, which may lead to oil leakage. Regularly replace and filter the oil to keep the oil clean and help reduce oil leakage problems.

8. Machine tool vibration and impact: The high-speed movement or impact of CNC lathes may cause pressure changes in the oil in the system, causing oil leakage. Taking vibration reduction and buffering measures to reduce the vibration and impact of machine tools can help reduce the risk of oil leakage.

Oil leakage problems may involve many aspects. Regular maintenance and inspection are the key to ensuring the normal operation of the precision CNC lathe oil lubrication system.