1. Introduction
This manual provides essential instructions for the safe operation, maintenance, and care of your POPOMAN MTW120B Cordless Detail Sander. Please read this manual thoroughly before using the tool to ensure proper function and to prevent injury. Keep this manual for future reference.
2. Important Safety Instructions
Always follow basic safety precautions when using electric tools to reduce the risk of fire, electric shock, and personal injury.
- Work Area Safety: Keep the work area clean and well-lit. Cluttered or dark areas invite accidents. Do not operate power tools in explosive atmospheres, such as in the presence of flammable liquids, gases, or dust.
- Electrical Safety: Avoid body contact with earthed or grounded surfaces. Do not expose power tools to rain or wet conditions.
- Personal Safety: Always wear eye protection, dust mask, non-skid safety shoes, hard hat, or hearing protection as appropriate for the conditions. Dress properly. Do not wear loose clothing or jewelry. Keep hair, clothing, and gloves away from moving parts.
- Tool Use and Care: Do not force the power tool. Use the correct power tool for your application. Disconnect the battery pack from the power tool before making any adjustments, changing accessories, or storing power tools.
- Battery Pack Use and Care: Recharge only with the charger specified by the manufacturer. Use power tools only with specifically designated battery packs.
3. Package Contents
Verify that all items are present and in good condition upon unpacking.
- 1 x POPOMAN MTW120B Cordless Detail Sander
- 1 x 18V 2.0Ah Lithium-ion Battery
- 1 x Fast Charger
- 1 x SDS Finger Pad
- 12 x Sandpapers (4 x P60, 4 x P80, 4 x P180 grits)
- 1 x Dust Bag
- 1 x Instruction Manual
4. Product Overview
Familiarize yourself with the components of your detail sander.

Figure 1: Main components of the POPOMAN MTW120B Cordless Detail Sander. Key parts include the On/Off Switch, Soft Grip Handle, Dust Bag, Velcro System, SDS Finger Pad, and Lock Button.
- On/Off Switch: Activates and deactivates the sander.
- Soft Grip Handle: Provides comfortable and secure handling during operation.
- Dust Bag: Collects sanding dust to maintain a clean work area.
- Velcro System: Allows for quick and easy attachment and removal of sandpaper sheets.
- SDS Finger Pad: A specialized sanding pad for reaching smaller or narrower surfaces.
- Lock Button: Used to secure or release the SDS finger pad.
- Battery: 18V 2.0Ah Lithium-ion battery provides cordless power.

Figure 2: Internal cooling system, dust collection system, and safety switch for enhanced performance and user comfort.

Figure 3: The ergonomic design of the sander handle ensures comfortable grip and reduced fatigue during extended use.
5. Setup
5.1 Charging the Battery
- Connect the fast charger to a power outlet.
- Insert the 18V 2.0Ah Lithium-ion battery into the charger.
- Allow the battery to charge completely. A full charge typically takes approximately one hour.
- Once charged, remove the battery from the charger.
5.2 Attaching the Battery
- Align the battery with the battery slot on the sander.
- Slide the battery into the slot until it clicks securely into place.
5.3 Attaching Sandpaper

Figure 4: The Velcro system allows for quick and secure attachment of sandpaper sheets.
- Ensure the sander is turned off and the battery is removed.
- Select the appropriate grit sandpaper for your task (P60 for coarse removal, P80 for general sanding, P180 for fine finishing).
- Align the sandpaper with the sanding pad, ensuring the holes on the sandpaper match the holes on the pad for dust extraction.
- Press the sandpaper firmly onto the sanding pad. The Velcro system will hold it in place.
5.4 Attaching the SDS Finger Pad (Optional)

Figure 5: Steps for adjusting the SDS finger pad for precise sanding in tight spaces.
- To attach the SDS finger pad, lift the lock button on the upper part of the sander.
- Pull out the SDS finger pad.
- To secure the SDS finger pad, push the lock button back.
- The SDS finger pad has a telescopic reach of 0-4.3cm, allowing adjustment for various small or narrow surfaces.
5.5 Attaching the Dust Bag
- Slide the dust bag onto the dust extraction port at the rear of the sander until it is firmly attached.
- Ensure it is securely fitted to prevent dust leakage.
6. Operating Instructions
6.1 Before Operation
- Ensure the work surface is clean and free of obstructions.
- Secure the workpiece to prevent movement during sanding.
- Wear appropriate personal protective equipment (PPE), including safety glasses and a dust mask.
6.2 Starting and Stopping the Sander
- To start the sander, press the On/Off switch.
- To stop the sander, press the On/Off switch again.
6.3 Sanding Technique

Figure 6: The sander is suitable for various applications, including sanding metal, painted walls, and wood surfaces.
- Hold the sander firmly with both hands.
- Place the sanding pad flat on the workpiece before turning the tool on.
- Apply light, even pressure and move the sander in smooth, overlapping strokes.
- Avoid pressing too hard, as this can reduce sanding efficiency and damage the workpiece or sander.
- For optimal dust collection, ensure the dust bag is properly attached and emptied regularly.
7. Maintenance
Regular maintenance ensures the longevity and optimal performance of your sander.
7.1 Cleaning
- Always disconnect the battery before cleaning.
- Wipe the exterior of the tool with a soft, damp cloth. Do not use harsh chemicals or abrasive cleaners.
- Regularly empty the dust bag. For thorough cleaning, the dust bag can be detached and shaken out or vacuumed.
- Inspect the ventilation openings for dust buildup and clear them to prevent overheating.
7.2 Sanding Pad Inspection
- Periodically inspect the sanding pad for wear or damage. Replace if necessary to ensure effective sanding and proper sandpaper adhesion.
7.3 Battery Care
- Store batteries in a cool, dry place away from direct sunlight and extreme temperatures.
- Do not store batteries in a discharged state for extended periods. Recharge them periodically if not in use.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Sander does not start. | Battery not charged or not properly inserted. | Ensure battery is fully charged and securely inserted. |
| Reduced sanding performance. | Worn or clogged sandpaper; sanding pad worn. | Replace sandpaper. Inspect and replace sanding pad if necessary. |
| Excessive vibration or noise. | Loose sandpaper; damaged sanding pad; internal issue. | Check sandpaper attachment. Inspect sanding pad. If problem persists, contact customer support. |
| Dust bag not collecting effectively. | Dust bag full or improperly attached; dust extraction holes blocked. | Empty and reattach dust bag. Clear any blockages in the dust extraction holes. |
| Tool overheats. | Blocked ventilation openings; continuous heavy use. | Clear ventilation openings. Allow the tool to cool down. Avoid prolonged heavy use. |
9. Specifications
| Feature | Detail |
|---|---|
| Model | MTW120B |
| Brand | POPOMAN |
| Power Source | Battery (Cordless) |
| Battery Type | 18V 2.0Ah Lithium-ion |
| Charger | Fast Charger (2.0 Ah, 60 min charge time) |
| No-Load Speed | 13000 RPM |
| Sanding Pad Type | Velcro System, SDS Finger Pad |
| Included Sandpaper Grits | P60, P80, P180 |
| Product Dimensions | 16 x 9.3 x 12.3 cm |
| Product Weight | 1.98 kg |
| UPC | 795853394702 |
10. Warranty and Support
POPOMAN offers a 2-year quality promise for this product. For warranty claims, technical support, or any inquiries regarding your MTW120B Cordless Detail Sander, please contact POPOMAN customer service through your purchase platform or the official POPOMAN website.
Please retain your proof of purchase for warranty validation.