NEMA 17 Stepper Motor Gearbox – Integrated Planetary Gear Motor Solution

This NEMA 17 stepper motor gearbox combines a standard 42mm stepper motor with a precision planetary gearbox, offering higher output torque, reduced reflected inertia, and improved motion stability compared to a standalone motor.

Unlike traditional assemblies using a separate motor and gearbox, this integrated planetary gear motor ensures perfect alignment, lower mechanical backlash, and higher transmission efficiency.

---

Key Advantages of NEMA 17 Planetary Gear Motor

• Compact integrated design – motor and planetary gearbox in one unit
• High torque output with reduced motor size
• Low backlash planetary gearboxes for precision positioning
• Wide range of planetary gear ratio options
• Optional ENCODER for closed-loop or feedback applications
• Gearbox for stepper motor supports customization of output shaft

---

Typical Applications

• CNC linear axis and rotary tables
• Robotics joints and actuator modules
• Medical equipment positioning systems
• Automation equipment and pick-and-place machines
• Planetary gear box generator and motion drive units

---

Stepper Motor Technical Specifications

Parameter	Value
Frame Size	NEMA 17 (42 mm)
Step Angle	1.8° ±5%
Number of Phases	2
Phase Voltage	3.6 VDC
Phase Current	1.33 A
Phase Resistance	2.7 Ω ±10% (20°C)
Phase Inductance	4.2 mH ±20%
Holding Torque (Motor)	0.32 N·m
Insulation Class	Class B
Insulation Resistance	≥100 MΩ (500V DC)
Ambient Temperature	-20°C to +50°C
Motor Weight	Approx. 0.4 kg
Rated Voltage	DC 12–36 V

---

Planetary Gearbox Specifications

Item	Specification
Gearbox Type	Planetary Gearbox
Planetary Gear Ratio	10:1
Backlash (Arcmin)	≤15 arcmin
Efficiency	Up to 95%
Noise Level	≤58 dB
Reduction Stages	Single Stage

This planetary gearbox is optimized for stepper motor applications, delivering stable torque output with minimal loss and excellent durability.

---

Encoder Options (Optional)

Encoder Type	Description
Incremental Encoder	Supports position and speed feedback
Resolution	Optional (e.g. 1000 PPR)
Output Signal	A+, A-, B+, B-
Supply Voltage	5V / 12V (Optional)

The integrated ENCODER enables closed-loop control and fault detection, ideal for high-reliability motion systems.

---

Wiring Diagram

Wire Color	Signal
Black (BLK)	A+
Green (GRN)	A-
Red (RED)	B+
Blue (BLU)	B-

Excitation sequence is clockwise when viewed from the mounting face. Proper wiring ensures accurate motion direction and torque output.

---

Why Choose an Integrated Planetary Gear Motor?

Compared to separate motor and gearbox assemblies, an integrated planetary gear motor offers better alignment accuracy, reduced backlash, and improved system reliability. This makes it a preferred solution for modern automation and precision equipment.

If you need custom shaft dimensions, encoder options, or alternative planetary gear ratios, please contact us for customization support.

Download Datasheet

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

📄 Download PDF Datasheet