DC Motor R390 High Torque Micro Motor
Powerful 6V-12V Brush Engine for Tools and Toys
The R390 is a high torque micro DC motor rated for 6V to 12V operation, delivering 20000RPM at peak speed. This brush motor engine is ideal for power tools, hair dryers, toys, and screwdriver tools.
High Torque Output - Powerful performance for demanding tasks
Wide Voltage Range - Operates from 6V to 12V reliably
Ensure proper voltage matching to application
Use with speed controller for variable operation
Do not exceed 12V maximum rating
Technical Specifications
| Parameter | Value |
|---|
| Operating Voltage | 6V to 12V DC |
| No-Load Speed | 20000 RPM |
| Motor Type | Brush DC |
| Shaft Diameter | 2.3mm |
| Body Length | 38mm |
| Diameter | 27mm |
| Current Consumption | 0.5A to 1.5A |
| Rotation | CW/CCW reversible |
= Key Features =
High Torque Design - Suitable for mechanical loads
Compact Size - Fits in small devices
Ball Bearing Support - Smooth and quiet operation
Low Noise - Reduced vibration
Precision Balanced - Long operating life
= Applications =
- Electric screwdrivers
- Hair dryers and blowers
- RC vehicles and toys
- Mini power tools
- Robotic actuators
- DIY project motors
Industrial Quality - Designed for heavy use
Versatile Performance - Powers many applications
√ Includes mounting holes
√ Pre-wired terminals ready
√ Suitable for PWM speed control
Wiring and Connection
Standard connections:
- Red wire: Positive terminal
- Black wire: Negative terminal
- Reverse polarity: Reverses rotation
Use 0.5mm² wire for power connections
Add flyback diode for inductive protection
Ensure good electrical contact at terminals
Performance Notes
Speed varies with voltage:
- 6V: Approximately 10000 RPM
- 9V: Approximately 15000 RPM
- 12V: Full 20000 RPM speed
Torque output increases with voltage and current:
- Higher voltage provides greater torque
- Current draw increases with mechanical load
- Allow cooling for extended operation
Efficient Operation - Optimal at 9V to 12V
Reliable Brushes - Carbon brush for long life
Do not run without load for extended periods
Keep away from moisture and dust
Use proper fuse for overcurrent protection
Common Uses
The R390 motor excels in handheld devices where both speed and torque are needed. It provides sufficient power for small drilling and driving tasks. For continuous operation, ensure adequate ventilation around the motor body.
Mount securely to prevent vibration damage
Lubricate bearings periodically for smoothness
Over 1 million units in service
Consistent quality from production
√ Mounting screws included
√ Shaft keyway for secure coupling
√ Balanced rotor for reduced vibration
Troubleshooting
Motor not starting:
- Check voltage supply
- Verify connections
Avoid insufficient current supply
Excessive noise:
- Check shaft alignment
- Lubricate bearings
Avoid loose mounting