XIIW 81704
XIIW 1/2 Inch Air Impact Wrench User Manual
Model: 81704
Introduction
This manual provides essential information for the safe and effective operation, maintenance, and troubleshooting of your XIIW 1/2 Inch Air Impact Wrench. Please read this manual thoroughly before using the tool to ensure proper handling and to prevent injury or damage.

Figure 1: XIIW 1/2 Inch Air Impact Wrench, showing its compact design and included air connector and hex key.

Figure 2: Key performance metrics of the impact wrench, highlighting its 8000 RPM free speed and 1560 ft-lb maximum loosening torque.
Safety Information
Always observe basic safety precautions when using power tools to reduce the risk of fire, electric shock, and personal injury.
- Eye Protection: Always wear ANSI-approved safety goggles or safety glasses with side shields.
- Hearing Protection: Wear hearing protection during extended use.
- Hand Protection: Use appropriate gloves to protect hands from vibration and potential pinch points.
- Air Supply: Ensure the air compressor is properly maintained and the air hose is free from damage. Do not exceed the maximum operating pressure of 90 PSI.
- Disconnect Air: Always disconnect the air supply before changing accessories, performing maintenance, or when the tool is not in use.
- Secure Workpiece: Always secure the workpiece before operating the tool.
- Proper Ventilation: Use in a well-ventilated area.
- Keep Clear: Keep hands, hair, and loose clothing away from moving parts.
- Tool Condition: Do not use the tool if it is damaged or malfunctioning.
Components and Features
Familiarize yourself with the main components of your XIIW Air Impact Wrench.

Figure 3: Key components including Square Drive (1/2"), Trigger, Ergonomic Grip, Forward and Reverse Exchange Knob, and Air Inlet. Dimensions are also shown.
- Square Drive (1/2"): For attaching sockets.
- Trigger: Activates the tool.
- Ergonomic Grip: Designed for comfortable handling and reduced vibration.
- Forward and Reverse Exchange Knob: Controls the direction of rotation and adjusts torque settings.
- Air Inlet: Connection point for the air hose.
- Downward Exhaust: Directs exhaust air and oil away from the workpiece, improving visibility and cleanliness.
Setup
- Air Supply Connection:
- Ensure your air compressor is capable of providing the required air pressure (90 PSI minimum) and average air consumption (5 cfm).
- Apply sealant tape to the threads of the air inlet fitting to prevent air leakage.
- Connect the air inlet fitting to the tool's air inlet.
- Attach your air hose (3/8" recommended) to the air inlet fitting.

Figure 4: Illustration of the downward exhaust and air connection specifications.
- Lubrication:
- Before each use, add a few drops of pneumatic tool oil into the air inlet. This lubricates the internal components and extends tool life.
- Socket Attachment:
- Select the appropriate 1/2 inch drive impact socket for your application.
- Push the socket firmly onto the square drive until it locks into place.
Operating Instructions
This section details how to operate your impact wrench for various tasks.

Figure 5: The Forward/Reverse Exchange Knob allows selection of rotation direction and torque levels.
- Direction and Torque Adjustment:
- The Forward/Reverse Exchange Knob controls both the direction of rotation and the power output.
- Forward (Tightening): The tool has 3 forward power settings:
- Forward 1: Approximately 200 ft-lb (271 N·m)
- Forward 2: Approximately 1000 ft-lb (1357 N·m)
- Forward 3: Approximately 1500 ft-lb (2035 N·m)
- Reverse (Loosening): The tool has 1 reverse setting, providing maximum loosening torque of 1560 ft-lb (2116 N·m).
- Operation:
- Ensure the socket is securely seated on the fastener.
- Press the trigger to activate the tool. The tool will begin to impact once resistance is met.
- Release the trigger to stop the tool.
- Applications:
This impact wrench is suitable for heavy-duty applications such as:
- Automobile repair, including lug nuts and suspension components.
- Industrial assembly and disassembly.
- Any task requiring high torque for fastening or loosening stubborn bolts.
Maintenance
Regular maintenance ensures the longevity and optimal performance of your impact wrench.
- Lubrication: Add a few drops of pneumatic tool oil to the air inlet before each use or every few hours of continuous operation.
- Cleaning: Keep the tool clean and free from dirt, dust, and debris. Wipe down the exterior with a clean cloth. Do not use harsh chemicals.
- Air Filter/Regulator: If using an inline air filter/regulator, regularly check and drain any accumulated moisture.
- Storage: Store the tool in a dry, clean environment away from direct sunlight and extreme temperatures. Disconnect from air supply before storage.
- Hose Inspection: Periodically inspect the air hose for cuts, abrasions, or leaks. Replace damaged hoses immediately.
Troubleshooting
Refer to this section for common issues and their solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Tool not operating or low power |
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| Excessive vibration |
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| Air leakage from tool body |
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Specifications
Technical specifications for the XIIW 1/2 Inch Air Impact Wrench.
| Attribute | Value |
|---|---|
| Model Number | 81704 |
| Drive Size | 1/2 inch |
| Max Torque (Loosening) | 1560 ft-lbs (2116 N·m) |
| Free Speed | 8000 RPM |
| Mechanism | Twin Hammer |
| Average Air Consumption | 5 cfm |
| Operation Pressure | 90 PSI minimum |
| Air Inlet Size | NPT 1/4" (6.3mm) |
| Recommended Air Hose Size | 3/8" (9.5mm) |
| Item Weight | 4.4 lbs |
| Material | Alloy Steel |
| Color | Red |
| Dimensions (Length) | 7.04 Inches (179mm) |
Warranty and Support
For warranty information or technical support, please contact XIIW customer service.
You can also visit the official XIIW store on Amazon for more product information and support resources: XIIW Store
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