1. Introduction
Thank you for choosing the Mijia Brushless Electric Drill Screwdriver 2nd Generation. This multi-functional smart home power tool is designed for efficient drilling and screwing tasks. Featuring a high-performance brushless motor, long-lasting battery, and intelligent control, it simplifies various household and DIY projects. Please read this manual thoroughly before use to ensure safe and optimal operation.
Figure 1: Mijia Brushless Electric Drill Screwdriver 2nd Generation with its carrying case.
2. Package Contents
Verify that all items are present in your package:
- Electric Drill x 1
- Drill Bit x 5
- Drill Bit Sleeve x 1
- Bit x 10 (Screwdriver Bits)
- Extension Rod x 1
- Bit Sleeve x 1 (for Extension Rod)
- Storage Bag x 1
- User Manual x 1
Figure 2: Illustrated Packing List.
3. Product Overview
Familiarize yourself with the main components and features of your electric drill screwdriver:
- Brushless Motor: High-performance motor for efficient and smooth operation.
- 1900mAh Battery: Long-lasting lithium-ion battery pack.
- Digital Display: Shows current mode and battery status.
- Self-locking Chuck: Ratchet design for firm bit clamping.
- LED Light: Illuminates the work area.
- Reverse/Lock Button: Controls rotation direction and locks the trigger.
- Non-slip Handle: Ergonomic design for comfortable grip.
- Type-C Charging Port: Convenient charging interface.
Figure 3: Key Features of the Electric Drill Screwdriver.
Figure 4: Internal view of the brushless motor and planetary gear structure.
Figure 5: Internal view of the 1900mAh battery pack.
4. Specifications
| Parameter | Value |
|---|---|
| Product Name | Mijia Brushless Electric Drill 2 |
| Product Model | MJWSDZ002QW |
| Product Size | 166 x 55 x 205mm |
| Maximum Torque | 50N·m |
| No-load Speed | 0-1700 rpm (High Speed Mode) 0-400 rpm (Low Speed Mode) |
| Charging Input | 5V=2A; 9V=2A; 12V=2A |
| Rated Voltage | 14.4V |
| Charging Interface | Type-C |
| Rated Capacity | 1900mAh |
| Battery Type | Lithium-ion battery pack |
| Charging Time | Approximately 2 hours |
| Net Weight | Approximately 990g (including 8mm Overlord drill bit) |
| Working Temperature | -10°C to 45°C |
| Charging Temperature | 5°C to 40°C |
| Storage Temperature | -10°C to 45°C |
| Maximum Clamping Diameter | Ф10mm |
5. Setup
5.1 Charging the Battery
- Connect the Type-C charging cable to the charging port on the drill.
- Connect the other end of the cable to a compatible power adapter (5V=2A, 9V=2A, or 12V=2A).
- The digital display will indicate charging status. A full charge takes approximately 2 hours.
- Ensure the charging temperature is between 5°C and 40°C.
5.2 Installing/Changing Bits
- Ensure the drill is powered off and the reverse/lock button is in the locked (middle) position to prevent accidental startup.
- Twist the chuck counter-clockwise to open the jaws.
- Insert the desired drill bit or screwdriver bit into the chuck. Ensure it is seated firmly. For screwdriver bits, you may use the magnetic extension rod for added reach.
- Twist the chuck clockwise to tighten the jaws securely around the bit. The ratchet self-locking chuck design ensures a tight occlusion.
- To remove a bit, twist the chuck counter-clockwise until the jaws open, then pull the bit out.
Figure 6: Ratchet Self-locking Chuck.
Figure 7: Magnetic Extension Rod in use.
6. Operating Instructions
6.1 Power On/Off and Direction Control
- To turn on the drill, slide the reverse/lock button to the left (forward rotation) or right (reverse rotation).
- To turn off the drill, release the trigger. To lock the trigger and prevent accidental startup, slide the reverse/lock button to the middle position.
6.2 Selecting Operating Modes and Speed
The drill features a digital display and controls for selecting different operating modes and adjusting speed/torque.
Figure 8: Digital Display with Mode Selection.
- High Speed Mode: For drilling tasks requiring higher RPM (0-1700 rpm).
- Low Speed Mode: For screwing tasks or drilling delicate materials requiring lower RPM (0-400 rpm).
- Manual Mode: Allows for precise adjustment of torque through 32 gears. Use the '+' and '-' buttons on the display to adjust.
- Automatic (A) Mode: The intelligent chip automatically matches the proper torque, preventing over-tightening or damage to screws. Ideal for new users.
Figure 9: Automatic Mode 'A' on Digital Display.
6.3 Drilling and Screwing Applications
The included bits are suitable for various materials:
- Drill Bits:
- 8mm alloy Overlord drill: Wood, plastic, thin metal, lightweight concrete.
- 6mm multi-functional ceramic drill: Ceramic tiles, red bricks, plastics.
- 4/6/8mm woodworking drills: Wood.
- Screwdriver Bits: Includes Straight (SL4, SL5), Plum blossom (T15, T20, T25, T30), Phillips (PZ1, PZ2), Cross (PH0, PH1, PH2, PH3), Quartet (S1, S2), Triangle (2.3), and Hexagon (H2, H3, H4, H5, H6) for various screw types.
Figure 10: Drill Bit Types and Applications.
6.4 Wet and Dry Drilling
The drill supports both wet and dry drilling depending on the material:
Figure 11: Wet and Dry Drilling Applications.
- Dry Drilling: Suitable for non-load-bearing walls, hollow aluminum alloy tubes, and PVC water pipes.
- Wet Drilling: Recommended for ceramic tiles, marble, and cement board. For ceramic tiles, water injection is required before wet drilling to prevent overheating and extend drill bit life. Use low speed and uniform pressure to avoid bits getting stuck or broken.
7. Maintenance
7.1 Cleaning
- Always disconnect the drill from any power source before cleaning.
- Wipe the exterior of the drill with a soft, damp cloth. Do not use harsh chemicals or abrasive cleaners.
- Clean dust and debris from ventilation openings regularly to ensure proper airflow and prevent overheating.
- Clean bits and accessories after each use to maintain their effectiveness and longevity.
7.2 Storage
- Store the drill and its accessories in the provided EVA storage bag to protect them from dust and damage.
- Ensure the drill is fully charged before long-term storage to preserve battery health.
- Store in a dry place with a temperature between -10°C and 45°C, away from direct sunlight and moisture.
- Keep out of reach of children.
Figure 12: Customized EVA Storage Bag.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Drill does not turn on | Battery is depleted Reverse/lock button in locked position | Charge the battery Slide the button to forward or reverse position |
| Reduced power/speed | Low battery Incorrect mode selected Overheating | Recharge battery Select appropriate speed/torque mode Allow drill to cool down |
| Bit slips or wobbles | Chuck not tightened properly Damaged bit | Ensure chuck is securely tightened Replace with a new, undamaged bit |
| Drill stops during operation | Overload protection activated Battery depleted | Reduce pressure or load Charge the battery |
9. User Tips
- Utilize Automatic Mode: For general screwing tasks, especially if you're new to power tools, the intelligent 'A' mode can prevent over-tightening and damage to materials or screws.
- Match Bit to Material: Always select the correct drill bit or screwdriver bit for the material and fastener type to ensure efficiency and prevent damage to the bit or workpiece.
- Wet Drilling for Hard Surfaces: When drilling ceramic tiles, marble, or cement board, remember to use the wet drilling technique with water injection to cool the bit and extend its lifespan.
- Secure Your Workpiece: Always clamp or secure the material you are working on to prevent it from moving, which can cause injury or damage.
- Start Slow: Begin drilling or screwing at a lower speed, especially when starting a hole or driving a screw, to gain control and prevent slipping.
10. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the official Mijia website or contact your local distributor. Keep your purchase receipt as proof of purchase for any warranty claims.
