NEMA 17 Planetary Gearbox 42mm Stepper Motor Reducer for 3D Printer Geared(1 to 139)

For $125.57 CAD, the NEMA 17 Planetary Gearbox 42mm Stepper Motor Reducer for 3D Printer Geared(1 to 139) packs respectable specs: Step Angle: 1.8 degrees (200 steps/rev), Rated Current: 0.4A per phase, Holding Torque: 26 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.

The NEMA 17 Planetary Gearbox 42mm Stepper Motor Reducer for 3D Printer Geared(1 to 139) earns its place in the parts bin. Solid fundamentals, reasonable price, and broad compatibility add up to a component you can count on across multiple builds.