Beefy Torque 27 To 1 Planetary Gearbox For Nema 17 Stepper Motor 1.68A High Torque 3 Nm 7 RPM 0.067 Degree Step Angle For DIY CNC, 3D Printer, Robot Projects

Single-unit planetary gearbox for NEMA 17 steppers
✔️ Planetary gearbox 26.85:1, 3 Nm torque, 7 rpm, 0.067°

This compact geared motor combines a NEMA 17 bipolar stepper with an integrated planetary gearbox, delivering impressive torque at a steady, low speed. It’s a popular choice for DIY CNC, 3D printers, and small robotics where space is tight and precision matters.

✅ Frame size: 42x42 mm
✅ Motor length: 40 mm
✅ Gearbox length: 35 mm
✅ Shaft diameter: 8 mm
✅ Shaft length: 20 mm
✅ Gear ratio: 26.85:1
✅ Efficiency: 81%
✅ Backlash at no-load: 1 deg
✅ Holding torque: 3 Nm
✅ Max permissible torque: 3 Nm (425 oz-in)
✅ Moment permissible torque: 5 Nm (708 oz-in)
✅ Shaft axial load: 50 N
✅ Shaft radial load: 100 N
✅ Frame: 42x42 mm; Motor length 40 mm; Gearbox length 35 mm
✅ Shaft: 8 mm Ø, 20 mm length; D-cut length 15 mm
✅ Leads: 4; Lead length: 500 mm; Color-coded: Black, Green, Red, Blue
✅ Weight: 510 g
✅ Part number: 17HS15-1684S-PG27
✅ Recommended voltage: 12-24 V
✅ Inductance: 3.2 mH ±20%

💡 What is a NEMA 17 planetary gearbox used for in precision motion projects?

💡 It’s handy for achieving high torque at low speeds in a compact package.

- High torque at low speed for CNC, 3D printers, and robotics - 0.067° step angle and 26.85:1 gear ratio improve precision and repeatability - Works with standard bipolar drive controllers in the 12-24 V range - Designed for reliable performance with a compact footprint