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This 39 mm stepper motor delivers precision control with ±0.05° accuracy and smooth, low-vibration operation. Engineered with high-quality magnetic materials and 1.8° step angle supporting 256 microsteps, it ensures consistent repeatability above 98%. Ideal for medical instruments, optical equipment, and automation devices, this compact, high-accuracy stepper motor provides reliable performance and efficient positioning in demanding industrial applications.
| Quantity: | |
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Item | Core Specification |
Flange Size | 39×39 mm (NEMA16) |
Motor Type | 2-Phase Hybrid Stepper Motor |
Step Angle | 1.8° |
Body Length Range | 20~44 mm |
Holding Torque Range | |
Current Per Phase | 0.3~0.8 A |
Operating Temperature | -20℃ ~ +50℃ |
Max Temperature Rise | 80℃ |
Insulation Resistance | 100MΩ Min. (500VDC) |
Dielectric Strength | 500VAC for 1 Minute |
Number of Leads | 4 or 6 |
Optional Accessories | Controller, Encoder, Gearbox |
Electrical Specifications | ||||||||||
Model No. | Step Angle（°） | Motor Length (L)mm | Current /Phase（A） | Resistance /Phase（Ω） | Inductance /Phase（mH） | Holding Torque（g.cm） | # of Leads（No.） | Detent Torque（g.cm） | Rotor Inertia（g.cm²） | Weight（Kg） |
SLT39HY20-0404 | 1.8 | 20 | 0.4 | 6.6 | 7.5 | 650 | 4 | 50 | 11 | 0.12 |
SLT39HY20-0506 | 1.8 | 20 | 0.5 | 13 | 7.5 | 800 | 6 | 50 | 11 | 0.12 |
SLT39HY34-0404 | 1.8 | 34 | 0.4 | 30 | 32 | 2100 | 4 | 120 | 20 | 0.18 |
SLT39HY34-0306 | 1.8 | 34 | 0.3 | 40 | 20 | 1300 | 6 | 120 | 20 | 0.18 |
SLT39HY38-0504 | 1.8 | 38 | 0.5 | 24 | 45 | 2900 | 4 | 180 | 24 | 0.2 |
SLT39HY38-0806 | 1.8 | 38 | 0.8 | 7.5 | 6 | 2000 | 6 | 180 | 24 | 0.2 |
SLT39HY44-0304 | 1.8 | 44 | 0.3 | 40 | 100 | 2800 | 4 | 250 | 40 | 0.25 |
Product Overview
The 39mm NEMA16 DC Stepper Motor is a compact, high-precision 2-phase hybrid stepper motor, engineered for space-constrained Industrial Applications requiring ultra-accurate positioning and repeatable motion control. With a 39×39 mm square flange and ultra-compact body length ranging from 20 mm to 44 mm, this motor delivers exceptional positioning accuracy with a 1.8° step angle, supporting up to 256 microsteps for smooth, low-vibration operation. Manufactured with high-performance magnetic materials and strict compliance with ISO9001:2015 and IATF16949 quality standards, it ensures consistent performance and long-term reliability in precision industrial and medical applications.
This 39×39 mm compact NEMA16 stepper motor features an ultra-miniature footprint, making it ideal for embedded systems and equipment with extremely limited installation space. Its optimized magnetic circuit design and high-performance rare-earth magnets increase torque output per unit volume by over 20%, delivering exceptional power density without compromising on size or weight.
As a high precision 2-phase hybrid stepper motor, it delivers ±0.05° positioning accuracy with over 98% motion repeatability, ensuring consistent and accurate positioning even in high-cycle industrial operations. With a holding torque ranging from 650 to 2800 [g.cm](g.cm), it maintains full rated torque at low speeds, eliminating step loss and ensuring stable motion control for precision applications.
This micro stepper motor for industrial automation is built with high-precision ball bearings, with a maximum radial force of 28N and maximum axial force of 10N, ensuring long-term stable operation in demanding industrial environments. It features a maximum 80℃ temperature rise, -20℃ to +50℃ operating temperature range, 100MΩ minimum insulation resistance, and 500VAC dielectric strength for 1 minute, fully compliant with strict industrial safety standards.
This 39mm NEMA16 DC Stepper Motor is widely used in medical instruments, optical equipment, 3D printers, small robotic systems, embedded automation devices, precision dispensing equipment, and laboratory analysis instruments. It is the ideal motion control solution for precision equipment manufacturers and automation system integrators requiring ultra-compact size and high positioning accuracy.
We offer comprehensive customization services for the 39mm NEMA16 DC Stepper Motor to meet your unique precision motion control needs. Our engineering team can adjust winding parameters to customize current, resistance, and inductance ratings, modify mechanical dimensions including shaft length and mounting hole positions, and integrate optional components including encoders, gearboxes, and matched controllers. All custom motors undergo strict precision testing to ensure compliance with your application requirements.
Before wiring, confirm the driver current setting matches the motor’s rated phase current to avoid overheating and winding damage. Connect the motor leads to the driver according to the wiring diagram, ensuring correct phase sequence to prevent step loss and irregular motion. Mount the motor using the flange mounting holes, tighten bolts evenly to avoid body deformation, and ensure the motor shaft is coaxial with the load to minimize radial and axial stress. After installation, perform a low-speed test run to verify positioning accuracy and motion smoothness, and gradually increase speed and load only after confirming normal operation.
Our production facility is ISO9001:2015 and IATF16949 certified, and all motors undergo strict quality testing to meet global industrial precision standards.
The minimum order quantity is 3 units, with flexible options available for prototype testing and small-batch procurement.
Standard in-stock models ship within 1-2 working days; sample and custom orders take approximately 15 working days for production and delivery.
Optimize driver microstep settings to match the motor’s electrical parameters, ensure proper shaft alignment with the load, and replace worn bearings if necessary. Our technical team can provide full tuning guidance for your application.
As a professional precision motor manufacturer based in Changzhou, Jiangsu, we provide customized motion control solutions for precision equipment manufacturers, medical device builders, and automation system integrators. Whether you need standard 39mm NEMA16 DC Stepper Motor units or fully customized precision motion systems, our experienced engineering team offers dedicated technical support and rapid order fulfillment. Contact us today to get your exclusive quote and tailored precision motion solution.
