1pcs Motor Nema 17 Square Flange 42mm Planetary Reducer Stepping Motor Low Geared Stepper Motor with Gearbox(Reduction Ratio 5,Driver-UM242)
$113.99
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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
For $113.99 CAD, the 1pcs Motor Nema 17 Square Flange 42mm Planetary Reducer Stepping Motor Low Geared Stepper Motor with Gearbox(Reduction Ratio 5,Driver-UM242) packs respectable specs: Step Angle: 1.8 degrees (200 steps/rev), Rated Current: 2.0A per phase, Holding Torque: 59 Ncm. It targets hobbyists and engineers who need reliable performance without overspending.
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 1pcs Motor Nema 17 Square Flange 42mm Planetary Reducer Stepping Motor Low Geared Stepper Motor with Gearbox(Reduction Ratio 5,Driver-UM242) 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
- Works with standard A4988/TMC2209 stepper drivers
- Smooth microstepping reduces vibration and noise
- Reliable bipolar winding configuration for consistent torque
- High holding torque keeps position under load
Watch Out For
- No position feedback — open-loop only
- Requires a stepper driver board (not included)
- Wire color coding varies between manufacturers
Specifications
| Step Angle | 1.8 degrees (200 steps/rev) |
| Rated Current | 2.0A per phase |
| Holding Torque | 59 Ncm |
| Operating Voltage | 12V DC |
| Wiring | Bipolar 4-wire |
| Frame Size | 42mm x 42mm |
| Shaft Diameter | 8mm |
| Weight | 350g |
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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