Nema 17 Stepper Motor With Planetary Gearbox Fifty To One Gear Ratio MG Series Built In Shaft Coupling Bipolar High Torque Low Noise Long Life 48mm Length For Precise Low Cost CNC 3D Printer And Robotics StepperOnline

Single-unit NEMA 17 Stepper with 50:1 MG Gearbox
✔️ 0.52Nm torque, 50:1 gear ratio, built-in shaft coupling

This compact NEMA 17 stepper motor packs a 50:1 MG planetary gearbox and a built-in shaft coupling, making it ideal for compact CNCs, desktop 3D printers, and lightweight robotics where precise, low-cost motion is key.

✅ Frame size 42x42 mm
✅ Motor length 48 mm
✅ Gearbox length 51 mm
✅ Output shaft Ø8 mm, length 21.5 mm, keyway
✅ Gearbox: Spur planetary, powder metallurgy gears, 50:1 ratio, 80% efficiency
✅ Backlash at no-load ≤45 arcmin; max torque 10 Nm
✅ Holding torque 0.52 Nm; rated current 1.68 A
✅ Phase resistance 1.80 Ω; inductance 3.20 mH
✅ Insulation class B 130°C; part number 17HS19-1684S-MG50

💡 What is a NEMA 17 stepper motor with a 50:1 planetary gearbox used for in CNC and 3D printers?

It’s a handy drivetrain for precise, repeatable motion in compact setups.

- handy for small CNCs and hobby printers
- provides high torque at low speeds for accurate positioning
- built-in shaft coupling makes swaps quick and easy
- low-noise operation helps keep machines calm