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Servo Motor for Robotic Arm – AR3 NEMA 17 Planetary Gear Stepper Motor for 6 Axis Robot Arm
This AR3 type NEMA 17 geared stepper motor is designed as a high precision servo motor for robotic arm applications. Featuring a compact planetary gearbox, 0.45Nm holding torque, 1.68A current, and multiple reduction ratio options, it is ideal for six-axis robotic arms, desktop robots, automation systems, and 3D printed robot arm stepper motors.
AR3 Servo Motor for Robotic Arm Applications
This compact NEMA 17 planetary geared motor is specially developed for
servo motor for robotic arm applications including six-axis robotic arms,
desktop automation systems, and educational robot platforms.
The integrated gearbox improves output torque and positioning stability,
making it ideal for compact stepper motor robot arm systems.
Designed for precision motion control, this motor combines a 1.8° hybrid stepper motor
with a high efficiency planetary reducer. It is widely used in
stepper robot arm projects, collaborative robotic systems,
and 3d printed robot arm stepper motors.
Main Features
- Designed for six-axis robotic arm systems
- Integrated planetary reducer for higher output torque
- Compact NEMA 17 structure for desktop robots
- Multiple reduction ratios available
- High positioning accuracy and low backlash
- Suitable for educational and industrial robotic applications
- Compatible with AR3 robotic arm platforms
Motor Technical Specifications
| Parameter | Specification |
|---|---|
| Motor Type | Planetary Gear Stepper Motor |
| Frame Size | NEMA 17 (42×42mm) |
| Step Angle | 1.8° ±5% |
| Phase Number | 2 |
| Phase Voltage | 3.27 VDC |
| Phase Current | 1.68 A |
| Holding Torque | 0.45 Nm |
| Phase Resistance | 1.95 Ω ±10% |
| Phase Inductance | 4.4 mH ±20% |
| Insulation Class | Class B |
| Insulation Resistance | 100MΩ min. (500V DC) |
| Operating Temperature | -20°C to +50°C |
| Ambient Humidity | 15% – 95% |
| Motor Weight | Approx. 0.3kg |
| Recommended Driver | OK2D4020A |
Planetary Gearbox Reduction Ratio Table
| Reducer Series | Reduction Ratio | Rated Load (Nm) | Reducer Length (mm) | Efficiency | Backlash | Noise |
|---|---|---|---|---|---|---|
| Level 1 | 3 / 4 / 5 / 10 | 8 – 10 Nm | 40 mm | 96% | <15 arcmin | <55dB |
| Level 2 | 12 / 16 / 20 / 25 / 35 / 40 / 50 / 70 | 10 Nm | 51 mm | 94% | <20 arcmin | <55dB |
Excitation Sequence and Direction of Clockwise Rotation
| STEP | A+ | B+ | A− | B− |
|---|---|---|---|---|
| 1 | + | + | − | − |
| 2 | − | + | + | − |
| 3 | − | − | + | + |
| 4 | + | − | − | + |
Wiring Diagram
| Wire Color | Phase | Description |
|---|---|---|
| Black | A+ | Phase A Positive |
| Green | A− | Phase A Negative |
| Red | B+ | Phase B Positive |
| Blue | B− | Phase B Negative |
Applications
- Six-axis robotic arm systems
- Desktop automation robots
- AR3 robotic arm projects
- Collaborative robots (Cobots)
- Educational robotics platforms
- 3D printed robot arm stepper motors
- Industrial pick-and-place systems
Customization Options
Custom gearbox ratios, cable lengths, shaft structures, connectors,
and encoder configurations are available for OEM robotic arm projects.
Download Datasheet
Download the full specification sheet for detailed parameters, wiring guide, and performance curves.
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