Introduction
The Astro Pneumatic Tool 1838 ONYX 3/8" Nano Angle Impact Wrench is a compact and powerful pneumatic tool designed for professional use. It delivers significant torque in a small form factor, making it ideal for accessing confined spaces. This manual provides essential information for the safe and effective operation, setup, and maintenance of your impact wrench.
Image: The Astro Pneumatic Tool 1838 ONYX 3/8" Nano Angle Impact Wrench, showcasing its compact design.
Safety Information
Always read and understand all safety warnings and instructions before operating this tool. Failure to follow these instructions may result in electric shock, fire, and/or serious injury.
- Wear appropriate personal protective equipment, including eye protection, hearing protection, and gloves.
- Ensure the air supply is disconnected before changing accessories, performing maintenance, or storing the tool.
- Keep work area clean and well lit. Cluttered or dark areas invite accidents.
- Do not operate pneumatic tools in explosive atmospheres, such as in the presence of flammable liquids, gases, or dust.
- Maintain proper footing and balance at all times.
- Use only clean, dry, regulated compressed air at the recommended pressure.
Proposition 65 Warning:
This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
Product Overview
The Astro 1838 ONYX Nano Angle Impact Wrench features a durable aluminum housing, a 3/8" square drive, and a compact right-angle design for superior access in tight spaces. It is equipped with a 360° swivel air muffler for directional exhaust control.
Image: Side view of the Astro Pneumatic Tool 1838 ONYX Impact Wrench, highlighting the ONYX branding and compact profile.
Setup
Proper setup is crucial for the performance and longevity of your pneumatic impact wrench.
- Air Supply Connection: Connect a 3/8" minimum diameter air hose to the 1/4" NPT air inlet thread on the tool. Ensure all connections are secure and leak-free.
- Air Pressure Regulation: Use a regulated air supply. While the tool can handle up to 120 PSI, consult the manufacturer's recommendations for optimal operating pressure, typically around 90 PSI, to achieve the specified torque and prevent premature wear.
- Lubrication: Before first use and regularly thereafter, add a few drops of pneumatic tool oil into the air inlet. This lubricates internal components and extends tool life.
- Socket Attachment: Attach the appropriate 3/8" drive impact-grade socket securely to the square drive anvil.
Operation
Familiarize yourself with the controls before operating the impact wrench.
- Direction and Speed Control: The tool features a switch for selecting forward (F) or reverse (R) operation, with three distinct speed/power settings for each direction. Adjust the switch to the desired direction and power level (1, 2, or 3). Setting 3 provides maximum torque.
- Trigger Operation: The trigger is progressive, allowing for variable speed control. Gently press the trigger for slower speeds and increased control, or fully depress for maximum speed and power.
- Air Exhaust: The air exhaust features a 360° swivel muffler. Rotate the muffler to direct exhaust air away from your face or work area for comfort and safety.
- Applying Torque: For tightening fasteners, select the appropriate forward setting. For loosening, select reverse. Always verify final torque with a calibrated torque wrench when precise torque specifications are required.
Image: Top view of the Astro Pneumatic Tool 1838 ONYX Impact Wrench, illustrating the forward/reverse and speed selector switch.
Maintenance
Regular maintenance ensures optimal performance and extends the life of your impact wrench.
- Lubrication: Add 5-10 drops of pneumatic tool oil into the air inlet before each use or at least once daily if used frequently.
- Air Filter: Ensure your air compressor system has a functioning air filter to prevent moisture and debris from entering the tool.
- Hose and Connections: Regularly inspect air hoses for wear, cuts, or leaks. Ensure all fittings are tight and secure.
- Cleaning: Keep the tool clean and free of dirt and grime. Use a soft cloth to wipe down the exterior. Do not use harsh solvents.
- Storage: When not in use, store the tool in a clean, dry environment.
Troubleshooting
If you encounter issues with your impact wrench, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Tool not operating or low power | Insufficient air pressure or volume (CFM) | Check air compressor output, regulator setting, and ensure minimum 3/8" hose size. Verify air filter is not clogged. |
| Air leaks from connections | Loose fittings or damaged hose | Tighten all connections. Replace damaged hoses or fittings. |
| Tool runs sluggishly | Lack of lubrication | Add pneumatic tool oil to the air inlet. |
| Excessive vibration | Worn internal components or unbalanced socket | Ensure socket is properly seated and not damaged. If problem persists, contact manufacturer support. |
Specifications
Detailed technical specifications for the Astro Pneumatic Tool 1838 ONYX 3/8" Nano Angle Impact Wrench:
- Model Number: 1838
- Square Drive: 3/8"
- Max Torque: 415 ft/lbs
- Working Torque: 300 ft/lbs
- Free Speed: 9000 RPM
- Average Air Consumption: 4.2 CFM
- Minimum Hose Size: 3/8"
- Air Inlet Thread: 1/4" NPT
- Noise Level (Sound Pressure): 85 dB
- Length (End to End): 3.46"
- Height (End to End): 10.4"
- Weight: 2.78 lbs
- Handle Type: Straight Right Angle
- Clutch Type: Oversized Hammer
- Motor Housing: Aluminum with Bed Liner Finish
- Air Exhaust: 360° Swivel Air Muffler
- Switch: 3-speeds in both Forward and Reverse
- Material: Aluminum
- Color: Black
- UPC: 745227065455
Image: Diagram illustrating the dimensions of the Astro Pneumatic Tool 1838 ONYX Impact Wrench.
Warranty and Support
For detailed warranty information, please refer to the documentation included with your product or visit the official AP Astro Pneumatic Tool Company website. For technical support, parts, or service inquiries, please contact the manufacturer directly using the contact information provided on their official channels.