NEMA 17 Geared Stepper Motor with Brake 0.9° Planetary Gearbox Motor for Robotic Arm

This NEMA 17 geared stepper motor with brake combines a high precision 0.9° hybrid stepper motor, planetary gearbox, and 24V electromagnetic brake for accurate positioning and secure holding torque. Designed for robotic arms, AGV systems, CNC automation, and precision motion control applications, the motor delivers stable low-speed performance with reduced backlash and enhanced safety during power-off conditions.

NEMA 17 Geared Stepper Motor with Brake

This high precision NEMA 17 geared stepper motor with brake integrates a 0.9° hybrid stepper motor, precision planetary gearbox, and electromagnetic holding brake into one compact motion control solution.

Compared with conventional stepper motors, this integrated planetary gearbox motor delivers higher output torque, lower backlash, smoother low-speed operation, and secure position holding after power-off.
Therefore, it is ideal for robotic arms, automation equipment, AGV systems, semiconductor machinery, and precision positioning platforms.

Main Features

0.9° high resolution hybrid stepper motor
Integrated planetary gearbox reducer
Built-in 24V electromagnetic brake
Low backlash precision transmission
High holding torque and positioning accuracy
Compact NEMA 17 gearbox motor structure
Stable low-speed motion control
Suitable for robotic arm and CNC systems

Motor Technical Specifications

Parameter	Specification
Motor Type	NEMA 17 Geared Stepper Motor with Brake
Frame Size	42 × 42 mm
Step Angle	0.9° ±5%
Phase Number	2
Phase Voltage	3.06 VDC
Phase Current	1.7 A
Holding Torque	0.40 Nm
Phase Resistance	1.8 Ω ±10%
Phase Inductance	4.0 mH ±20%
Insulation Class	Class B
Insulation Resistance	100MΩ Min. (500V DC)
Ambient Temperature	-20°C to +50°C
Ambient Humidity	15% to 95%
Motor Weight	Approx. 0.38kg
Brake Voltage	DC24V Electromagnetic Brake
Recommended Driver	OK2D4020A

Planetary Gearbox Specifications

Reducer Stage	Reduction Ratio	Rated Load	Reducer Length	Efficiency	Backlash
Level 1	3 / 4 / 5 / 10	8–10 Nm	40 mm	96%	<15 arcmin
Level 2	12 / 16 / 20 / 25 / 35 / 40 / 50 / 70	10 Nm	51 mm	94%	<20 arcmin

Electromagnetic Brake Advantages

The integrated brake system automatically locks the motor shaft during power failure or emergency stop conditions.
As a result, the motor can maintain stable positioning in vertical motion systems and robotic arm applications.

Prevents load dropping during power-off
Improves robotic arm positioning safety
Suitable for vertical axis automation systems
Enhances holding stability under static loads

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

Robot arm joints and rotary axes
AGV and AMR drive systems
Precision positioning platforms
Semiconductor automation equipment
Industrial conveyor positioning systems
CNC and laser automation equipment
3D printed robot arm projects

Customization Services

Custom gearbox ratios, brake configurations, shaft dimensions, encoders, connectors, and cable lengths are available for OEM automation projects.

Download Datasheet

Download the full specification sheet for detailed parameters, wiring guide, and performance curves.

📄 Download PDF Datasheet

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