57mm NEMA23 Planetary Gear Motor – High Torque with Precision Planetary Gearbox

This 57mm NEMA23 planetary gear motor integrates a high-performance
2-phase stepper motor with a precision planetary gearbox to deliver
high torque output, stable transmission, and compact mechanical structure.
It is widely used in CNC machinery, robotics, indexing tables, and industrial automation.

The gearbox shaft length (48mm) can be customized according to application needs,
while the motor shaft length is 60mm. Multiple planetary gear ratio
options are available to optimize torque-speed performance.

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Motor Technical Specifications

Parameter	Specification
Frame Size	57mm (NEMA23)
Step Angle	1.8° ±5%
Number of Phase	2 Phase
Phase Voltage	2.52 VDC
Phase Current	2.8 A
Phase Resistance	0.9 Ω ±10% (20°C)
Phase Inductance	2.5 mH ±20%
Holding Torque	1.26 N·m
Insulation Class	Class B
Insulation Resistance	100 MΩ min. (500V DC)
Ambient Temperature	-20°C to +50°C
Humidity	15% – 95%
Motor Weight	Approx. 1.45 kg
Recommended Driver	OK2D860MC
Supply Voltage	DC 20–48V (AC 24–36V optional)

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Planetary Gearbox Specifications

Reducer Series	Grade 1	Grade 2	Grade 3
Exact Reduction Ratio	3.6 / 4.25	12.96 / 15.3 / 18.06	46.66 / 55.08 / 65.03 / 76.77
Reducer Length (mm)	48	60	72
Rated Load (N·m)	15	30	40
Maximum Load (N·m)	25	40	50
Efficiency (%)	90%	80%	70%
Noise	<60 dB	<60 dB	<60 dB
Gearbox Weight (kg)	0.55	0.75	0.95

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Wiring Diagram (2-Phase Bipolar)

Wire Color	Connection
Black (BLK)	A+
Green (GRN)	A−
Red (RED)	B+
Blue (BLU)	B−

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Key Features of This NEMA23 Planetary Gear Motor

• Integrated precision planetary gearboxes for high torque density
• Multiple planetary gear ratio configurations
• Customizable gearbox output shaft length (48mm standard)
• Stable torque output with low backlash planetary gearbox
• Suitable for CNC, robotics, conveyor systems, and planetary gear box generator mechanisms

This nema23 planetary gear motor provides reliable torque transmission
and compact structure, making it ideal for industrial automation systems requiring
high torque and controlled speed output.

Download Datasheet

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

📄 Download PDF Datasheet

To better understand gearbox selection, backlash control, and planetary gear ratio optimization,
please refer to our

planetary gearbox technical guide

which explains reducer structure, torque transmission principles, and industrial application considerations.

If you would like a deeper understanding of how planetary gearboxes work,
including structure, efficiency, and load distribution,
visit our detailed explanation page here:

how planetary gearboxes work