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1103A Tianhui Building, Yeqin 1st Road, Longcheng Street, Shenzhen, Guangdong, China
1103A Tianhui Building, Yeqin 1st Road, Longcheng Street, Shenzhen, Guangdong, China






This NEMA 17 stepper motor with 20:1 planetary gearbox is optimized for high torque and precise low-speed motion control.
Equipped with a planetary gearbox 20:1 reduction ratio, this stepper motor
delivers significantly increased output torque while maintaining precise positioning accuracy.
A 20:1 planetary gear ratio is suitable for applications requiring slow speed,
high torque, and improved load capacity.
| Parameter | Value |
|---|---|
| Reduction Ratio | 20 : 1 |
| Backlash | < 15 arcmin |
| Efficiency | 94% |
Backlash is an important factor to consider when selecting a planetary gearbox for your application.
It refers to the play between the gear teeth that occurs when direction is reversed.
The amount of backlash can impact the precision and repeatability of your system.
In general, a higher gear ratio, such as 50:1, tends to introduce more backlash,
which may be acceptable for low-precision applications. However, for high-precision tasks like CNC machines or robotics,
a lower gear ratio such as 3:1 or 5:1 with minimal backlash is preferred to ensure accurate motion control.
It’s crucial to assess the backlash tolerance in your system and choose the appropriate gearbox ratio.
Lower backlash is generally preferred for applications requiring high accuracy and repeatability.
For more details on how backlash affects your system, please consult our Backlash vs Accuracy vs Repeatability blog post.
For more information on how to reduce backlash and optimize your planetary gearbox performance, read our in-depth technical article: How to Minimize Backlash in Planetary Gears.
Download the full specification sheet for detailed parameters, wiring guide, and performance curves.
For applications requiring higher torque than a 20:1 planetary gearbox,a 50:1 planetary gearbox may be a better option.
Selecting the correct planetary gear ratio depends on load torque, speed requirements, and positioning accuracy.
This model is part of our
NEMA 17 planetary gearbox stepper motor series.
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