NEMA 17 Stepper Motor Bipolar with 20:1 High Precision Planetary Gearbox | 10Nm Torque Output

Product Overview – NEMA 17 Stepper Motor with 20:1 Planetary Gearbox

The geared stepper mtor is a high-precision NEMA 17 stepper motor integrated with a 20:1 planetary gearbox.
This gear reduction system offers a high torque output of up to 10Nm (1416.12oz.in) while maintaining compact size and excellent precision.
Perfect for use in robotics, CNC machinery, and automation systems requiring stable motion control with minimal backlash.

Technical Specifications

Item	Specification
Motor Type	NEMA 17 Hybrid Stepper Motor
Gearbox Type	Planetary Gearbox
Gear Ratio	20:1
Rated Output Torque of the gearbox	10Nm (1416.12oz.in)
Step Angle	1.8° ±5%
Phase Current	2.0A
Phase Resistance	1.0Ω ±10%
Phase Inductance	1.9mH ±20%
Static Moment	0.52N·m
Insulation Class	Class B
Insulation Resistance	100MΩ (500V DC)
Ambient Temperature	-20°C to +50°C
Recommended Driver	SSS2D5030MC
Motor Weight	Approx. 0.65kg
Use Voltage	VDC:12-36V

Subdivision Settings

Pulse / Rev	SW3	SW4	SW5	SW6
400	on	on	on	on
800	off	on	on	on
1600	on	off	on	on
3200	off	off	on	on
6400	on	on	off	on
12800	off	on	off	on
25600	on	off	off	on
51200	off	off	off	on

Wiring Diagram

Wire Color	Signal
Red	B+
Blue	B−
Black	A+
Green	A−

Gear Ratio Table

Model	Gear Ratio	Rated Torque (N·m)	Noise (dB)	Efficiency (%)	Backlash (arcmin)	Length (mm)
OKD42PL4EG	4:1	9	<55	96%	<15	40
OKD42PL5EG	5:1	9	<55	96%	<15	40
OKD42PL10EG	10:1	5	<55	96%	<15	40
OKD42PL20EG	20:1	10	<55	94%	<20	51
OKD42PL25EG	25:1	10	<55	94%	<20	51
OKD42PL50EG	50:1	10	<55	94%	<20	51
OKD42PL100EG	100:1	5	<55	94%	<20	51

FAQ – Common Planetary Gearbox Questions

Q1: What is the professional term for “Planetary gearbox” in English?
A1: The most accurate term is Planetary Gearbox or Planetary Gearhead. They describe a transmission system with a sun gear, planet gears, and ring gears.

Q2: What is Backlash and why is it important?
A2: Backlash refers to the small angular movement between gears in the gearbox when reversing direction. Low backlash is essential for precise positioning, especially in robotics and CNC machining.

Q3: What does “Direct-Connect” planetary gearbox mean?
A3: “Direct-Connect” refers to a planetary gearbox that is directly coupled with the motor, eliminating the need for additional couplings, providing higher rigidity, and reducing space requirements.

Q4: What does Rated Torque mean?
A4: Rated Torque is the maximum continuous torque that a gearbox can handle over its lifespan without failure. It’s crucial for ensuring the system’s reliability under load.

Q5: What makes planetary gearboxes advantageous?
A5: Planetary gearboxes provide high power density, low backlash, and smooth performance. These features make them perfect for applications in robotics, automation, and high-precision machinery.

Download Datasheet

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

📄 Download PDF Datasheet