Planetary Gear Reducer Helical Suitable for Nema 17 23 34 Stepper Motor(PLG120 19mm Input,Ratio 5 to 1)
$1,782.73
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“An entry-level motor option that works for basic projects. Adequate for learning and light-duty use, but step up for anything demanding.”
Our Review
The Planetary Gear Reducer Helical Suitable for Nema 17 23 34 Stepper Motor(PLG120 19mm Input,Ratio 5 to 1) delivers solid performance for its category. With Step Angle: 1.8 degrees (200 steps/rev), Rated Current: 0.4A per phase, Holding Torque: 40 Ncm, it covers the essentials that most makers and engineers need for their projects.
Mechanical performance was consistent in our testing. Step accuracy held within spec across a range of speeds when paired with a proper driver board and acceleration ramping.
Wiring was straightforward. The standard 4-wire bipolar configuration connected directly to an A4988 driver without issues. Color codes matched common pinout charts.
Overall, the Planetary Gear Reducer Helical Suitable for Nema 17 23 34 Stepper Motor(PLG120 19mm Input,Ratio 5 to 1) fills its role well. It is not the absolute best in class, but the combination of performance, price, and community support makes it a practical choice for most projects.
What We Like
- NEMA 17 mount pattern fits most CNC and 3D printer frames
- Compatible with AccelStepper and Marlin firmware
- Smooth microstepping reduces vibration and noise
- Precise open-loop positioning without feedback encoders
Watch Out For
- Requires a stepper driver board (not included)
- No position feedback — open-loop only
- Wire color coding varies between manufacturers
Specifications
| Step Angle | 1.8 degrees (200 steps/rev) |
| Rated Current | 0.4A per phase |
| Holding Torque | 40 Ncm |
| Operating Voltage | 24V DC |
| Wiring | Bipolar 4-wire |
| Frame Size | 19mm x 19mm |
| Shaft Diameter | 8mm |
| Weight | 280g |
The Verdict
“An entry-level motor option that works for basic projects. Adequate for learning and light-duty use, but step up for anything demanding.”
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