Introduction
This user manual provides comprehensive instructions for the safe and effective operation, setup, and maintenance of your STANLEY 78-341 Dual Action Sander. Please read this manual thoroughly before using the tool to ensure proper function and to prevent injury or damage. Keep this manual for future reference.
Important Safety Information
Always follow basic safety precautions when using power tools to reduce the risk of fire, electric shock, and personal injury. Familiarize yourself with all warnings and instructions.
- Wear Eye Protection: Always wear safety goggles or safety glasses with side shields.
- Wear Hearing Protection: Prolonged exposure to noise from sanding can cause hearing damage.
- Secure Workpiece: Always clamp or otherwise secure the workpiece to prevent movement during sanding.
- Maintain Good Grip: Hold the sander firmly with both hands during operation.
- Disconnect Air Supply: Disconnect the air supply before making any adjustments, changing accessories, or performing maintenance.
- Keep Work Area Clean: Cluttered areas invite accidents.
- Avoid Dust Inhalation: Use a dust collection system or wear a dust mask, especially when sanding materials that produce fine dust.
Product Overview
Figure 1: Stanley 78-341 Dual Action Sander. This image displays the complete sander, featuring a black main body, a silver collar, a black textured handle with a trigger, and a circular sanding pad attached to the front.
Key Features:
- High Speed Operation: 10,000 RPM for efficient material removal.
- Touch Lever Control: Ergonomic trigger for precise speed and power activation.
- Standard Arbor Size: 1/4" Arbor for compatibility with various sanding pads.
- Handle Exhaust: Directs exhaust away from the workpiece and operator.
- Air Inlet: 1/4" Air Inlet for connecting to an air compressor.
- Ergonomic Design: Molded handle for comfortable and secure grip.
Setup
- Air Supply Connection:
Ensure your air compressor is capable of providing 90 PSI and at least 2.5 CFM (18 SCFM) for optimal performance. Connect a 1/4" air hose to the 1/4" Air Inlet on the sander handle. Use an inline air filter/lubricator to prolong tool life and ensure clean, lubricated air supply.
- Attaching Sanding Pad/Disc:
Select the appropriate sanding disc for your application. The sander features a 1/4" arbor. Securely attach the sanding disc to the pad, ensuring it is centered and firmly seated. Refer to the sanding disc manufacturer's instructions for specific attachment methods.
- Pre-Operation Check:
Before each use, inspect the sander for any damage, loose parts, or obstructions. Verify that the air hose connections are secure and free of leaks. Ensure the work area is clear of debris and that proper ventilation is available.
Operating Instructions
- Starting the Sander:
With the air supply connected and regulated to 90 PSI, grip the sander firmly. Depress the Touch Lever to activate the sander. The tool will reach its maximum speed of 10,000 RPM quickly.
- Sanding Technique:
Apply the sanding disc flat against the workpiece. Move the sander in a consistent, overlapping pattern to ensure even material removal. Avoid excessive pressure, as this can reduce sanding efficiency and potentially damage the workpiece or tool. Allow the sander's speed to do the work.
- Stopping the Sander:
Release the Touch Lever to stop the sander. Wait for the sanding disc to come to a complete stop before setting the tool down or disconnecting the air supply.
Maintenance
Regular maintenance ensures the longevity and optimal performance of your STANLEY 78-341 Dual Action Sander. Always disconnect the air supply before performing any maintenance.
- Cleaning: Regularly clean the exterior of the sander with a dry cloth. Remove any dust or debris from the air inlet and exhaust ports.
- Lubrication: If not using an inline lubricator, apply a few drops of pneumatic tool oil into the air inlet before and after each use.
- Air Filter: Periodically check and clean or replace the air filter in your air supply system to prevent contaminants from entering the tool.
- Sanding Pad Inspection: Inspect the sanding pad for wear or damage. Replace worn pads to ensure effective sanding and prevent damage to the workpiece.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Sander does not start or runs slowly. | Low air pressure; Clogged air inlet; Insufficient air volume (CFM). | Check air compressor pressure (should be 90 PSI); Clean air inlet; Ensure air hose and compressor can supply adequate CFM. |
| Poor sanding performance. | Worn sanding disc; Incorrect grit for application; Excessive pressure. | Replace sanding disc; Use appropriate grit; Reduce pressure and allow tool to work. |
| Excessive vibration. | Damaged or unbalanced sanding pad/disc; Loose components. | Inspect and replace sanding pad/disc if damaged; Check for and tighten any loose components. |
Specifications
| Feature | Detail |
|---|---|
| Brand | STANLEY |
| Model Number | 78-341 |
| Maximum Rotational Speed | 10,000 RPM |
| Power Source | Air Powered |
| Air Inlet Size | 1/4" |
| Arbor Size | 1/4" |
| Recommended Air Pressure | 90 PSI |
| Air Consumption | 2.5 CFM @ 90 PSI (18 SCFM) |
| Item Weight | 4.28 pounds |
| Product Dimensions | 0.11 x 0.07 x 0.04 inches (Note: These dimensions may refer to packaging or a specific component, not the full tool.) |
| Grit Type | Medium (as specified for some applications) |
| UPC | 076174763584 |
Warranty and Support
Limited Lifetime Warranty:
STANLEY warrants this product to the original purchaser for its useful life against deficiencies in material and workmanship. This LIMITED LIFETIME WARRANTY does not cover products that are improperly used, abused, altered, or repaired. Deficient products will be replaced or repaired.
Customer Support:
For further assistance, technical support, or warranty claims, please contact STANLEY customer service or visit the official STANLEY website. You can also visit the STANLEY Store on Amazon for more product information.
