Linear Stepper Motor 42HA40-T8*8 NEMA 17 Through Screw(4401-t8-400mm,Range 8mm)
$330.31
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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
After integrating the Linear Stepper Motor 42HA40-T8*8 NEMA 17 Through Screw(4401-t8-400mm,Range 8mm) into several test builds, we found it to be a capable component for the price. Key specs include Step Angle: 1.8 degrees (200 steps/rev), Rated Current: 0.4A per phase, Holding Torque: 26 Ncm.
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 Linear Stepper Motor 42HA40-T8*8 NEMA 17 Through Screw(4401-t8-400mm,Range 8mm) 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
- Precise open-loop positioning without feedback encoders
- Affordable replacement for 3D printer and CNC upgrades
- Compatible with AccelStepper and Marlin firmware
- Reliable bipolar winding configuration for consistent torque
Watch Out For
- Wire color coding varies between manufacturers
- Loses steps at high speeds without acceleration ramping
- Requires a stepper driver board (not included)
Specifications
| Step Angle | 1.8 degrees (200 steps/rev) |
| Rated Current | 0.4A per phase |
| Holding Torque | 26 Ncm |
| Operating Voltage | 12V DC |
| Wiring | Bipolar 4-wire |
| Frame Size | 400mm x 400mm |
| Shaft Diameter | 5mm D-cut |
| Weight | 230g |
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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