1. Introduction
This manual provides essential information for the safe and effective operation, maintenance, and troubleshooting of your Stanley SCG400 20V Lithium Rechargeable Angle Grinder. Please read these instructions carefully before using the tool and keep them for future reference.
The Stanley SCG400 is a versatile 20V lithium-ion powered angle grinder designed for various grinding, cutting, and polishing tasks. It is intended for DIY and electrical applications.
2. Safety Information
Always observe basic safety precautions to reduce the risk of fire, electric shock, and personal injury. Keep this manual handy for quick reference.
General Safety Guidelines:
- Wear Personal Protective Equipment (PPE): Always wear safety goggles or a face shield, hearing protection, and heavy-duty gloves when operating the grinder.
- Secure Workpiece: Ensure the workpiece is stable and secured before beginning any operation.
- Maintain a Firm Grip: Always hold the grinder firmly with both hands during operation.
- Proper Ventilation: Work in a well-ventilated area, especially when grinding or cutting materials that produce dust or fumes.
- Inspect Tool and Accessories: Before each use, check the tool, disc, and guard for any damage or wear. Replace damaged parts immediately.
- Avoid Overreaching: Maintain proper footing and balance at all times.
- Disconnect Power: Always remove the battery pack before making any adjustments, changing accessories, or performing maintenance.
- Keep Children Away: Do not allow children or untrained individuals to operate the tool.
3. Product Components
Familiarize yourself with the main parts of your Stanley SCG400 angle grinder.
4. Setup
Before first use, ensure all components are correctly assembled and the battery is charged.
4.1 Attaching the Side Handle
The side handle can be attached to either side of the gear housing for optimal control and comfort, depending on your application and handedness.
- Align the threaded end of the side handle with one of the threaded holes on the gear housing.
- Screw the handle clockwise until it is securely tightened.
4.2 Adjusting the Guard
The guard protects against sparks and debris. Always ensure it is properly positioned and secured.
- Loosen the guard locking lever or screw.
- Rotate the guard to the desired position to deflect sparks away from you and bystanders.
- Tighten the guard locking lever or screw firmly to secure the guard in place.
4.3 Installing/Removing Grinding/Cutting Discs
Always use discs appropriate for the task and material. Ensure the disc diameter and bore match the grinder's specifications.
- To Install:
- Ensure the battery pack is removed.
- Press and hold the spindle lock button.
- Place the inner flange onto the spindle.
- Place the grinding/cutting disc onto the inner flange, ensuring it sits flush.
- Thread the outer flange (nut) onto the spindle and tighten it firmly using the spanner wrench provided.
- To Remove:
- Ensure the battery pack is removed.
- Press and hold the spindle lock button.
- Use the spanner wrench to loosen and remove the outer flange (nut).
- Remove the disc and inner flange.
4.4 Battery Installation and Charging
This tool is sold as 'tool only' and requires a separate 20V Stanley Fatmax Li-ion battery pack and charger.
- To Install Battery: Slide the charged battery pack into the battery port on the tool until it clicks securely into place.
- To Remove Battery: Press the battery release button and slide the battery pack out of the tool.
- Charging: Follow the instructions provided with your Stanley 20V Li-ion battery charger for proper charging procedures.
5. Operating Instructions
Follow these steps for safe and effective operation of your angle grinder.
5.1 Starting and Stopping the Tool
- To Start: Ensure the battery is installed. Press the power switch/trigger. Some models may have a lock-on button for continuous operation.
- To Stop: Release the power switch/trigger. If locked on, press the switch again to release the lock.
5.2 Grinding and Cutting Techniques
- Always allow the disc to reach full speed before contacting the workpiece.
- Apply light, even pressure. Do not force the tool, as this can cause kickback or damage the disc.
- For cutting, make shallow passes rather than trying to cut through the material in one go.
- Maintain a consistent angle for optimal results and disc life.
- Be aware of the direction of sparks and debris, ensuring they are directed away from you and others.
6. Maintenance
Regular maintenance ensures the longevity and safe operation of your tool.
6.1 Cleaning
- After each use, clean the tool with a soft, damp cloth. Do not use harsh chemicals or abrasive cleaners.
- Clear any dust or debris from the ventilation openings to prevent overheating.
- Periodically clean the spindle and flanges to ensure proper disc seating.
6.2 Disc Inspection and Replacement
- Regularly inspect grinding and cutting discs for cracks, chips, or excessive wear.
- Replace worn or damaged discs immediately. Never use a damaged disc.
- Ensure discs are stored properly to prevent damage.
6.3 Battery Care
- Store battery packs in a cool, dry place away from direct sunlight and extreme temperatures.
- Do not store fully discharged batteries for extended periods. Charge them periodically.
- Do not attempt to open or repair damaged battery packs.
7. Troubleshooting
Refer to this section for common issues and their solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Tool does not start | Battery not installed or discharged Power switch faulty | Ensure battery is properly installed and charged. This tool is 'tool only', battery and charger are sold separately. Contact customer support if switch is faulty. |
| Reduced power or speed | Low battery charge Overloading the tool Worn carbon brushes (if applicable) | Recharge battery. Reduce pressure on the workpiece. Contact customer support for brush replacement. |
| Excessive vibration | Damaged or improperly installed disc Loose components | Inspect disc for damage and ensure it is correctly installed and tightened. Check all fasteners and tighten if necessary. |
| Overheating | Blocked ventilation slots Continuous heavy use | Clean ventilation slots. Allow the tool to cool down during prolonged use. |
8. Specifications
| Feature | Specification |
|---|---|
| Model | SCG400 |
| Brand | STANLEY |
| Voltage | 20V |
| Battery Type | Li-ion |
| Rated Speed | 9000 min-1 |
| Disc Diameter | 100mm (4") |
| Disc Bore | 16mm |
| Max Disc Thickness (Grinding) | 6mm |
| Max Disc Thickness (Cutting) | 3.5mm |
| Spindle Diameter | M10 |
| Spindle Length (with Inner Flange) | 10mm |
| Spindle Length (without Inner Flange) | 17.5mm |
| Weight (without Battery Pack) | 2.2 kg |
| Origin | Mainland China |
| Certification | CE |
| DIY Supplies Category | Electrical |
9. User Tips
- Battery Compatibility: Remember that the SCG400 is a 'tool only' product. Ensure you have a compatible Stanley 20V Li-ion battery and charger for operation.
- Disc Selection: Always choose the correct type of disc (grinding, cutting, polishing) for the material you are working on. Using the wrong disc can be inefficient and dangerous.
- Angle of Attack: For grinding, typically hold the disc at a 15-30 degree angle to the workpiece. For cutting, hold the disc perpendicular (90 degrees) to the workpiece.
- Cool Down: For heavy-duty or prolonged tasks, allow the tool to cool down periodically to prevent motor damage and extend tool life.
10. Warranty and Support
This Stanley SCG400 Angle Grinder is a Certified Original product. For warranty information, service, or technical support, please contact the authorized Stanley dealer or the Stanley Store where the product was purchased. Keep your proof of purchase for any warranty claims.
