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How to Add Oil to an Air Impact Wrench?

Published in Air Tools Maintenance 3 mins read

To add oil to an air impact wrench, place approximately 10-15 drops of air tool oil into the air inlet, then run the tool for a few seconds to distribute the oil throughout the motor.

Here's a more detailed guide:

Why Oil is Important:

Air impact wrenches rely on compressed air to function, and the internal components need lubrication to prevent wear and tear, ensure smooth operation, and extend the tool's lifespan. Proper lubrication reduces friction, dissipates heat, and protects against corrosion.

Steps to Oil Your Air Impact Wrench:

  1. Disconnect from Air Supply: Ensure the air hose is disconnected from the impact wrench before adding oil for safety.

  2. Locate the Air Inlet: This is where the air hose connects to the wrench. It's typically a threaded opening.

  3. Apply Air Tool Oil: Use a dedicated air tool oil. Other types of oil may not be suitable and could damage the tool. Add 10-15 drops directly into the air inlet.

  4. Run the Wrench Briefly: Reconnect the air hose. Without applying any load, run the wrench for a few seconds (2-3 seconds) in both forward and reverse directions. This distributes the oil throughout the internal components.

Frequency of Oiling:

  • Regular Use: If you use your impact wrench frequently, oil it every day or before each use.
  • Extended Use Without a Lubricator: If you are using the tool for extended periods without an in-line lubricator, re-apply oil after every few hours of continuous use.
  • Infrequent Use: If you only use the wrench occasionally, oil it before storing it to protect against corrosion.

Using an In-Line Lubricator:

For consistent lubrication, consider using an in-line lubricator. This device attaches to the air hose and automatically dispenses oil into the air stream, providing continuous lubrication to the tool while it's in use. Adjust the lubricator to dispense the appropriate amount of oil.

Type of Oil to Use:

Always use a high-quality air tool oil specifically designed for pneumatic tools. These oils typically contain additives that prevent rust and corrosion and provide excellent lubrication. Avoid using general-purpose oils, as they may not provide adequate protection and could damage the tool's internal components.

By following these steps, you can keep your air impact wrench properly lubricated, ensuring optimal performance and a long service life.

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