Stepper NEMA 17 Bipolar Motor (42 × 42 × 34 mm)
Compact, reliable NEMA 17 bipolar stepper motor designed for precise motion control. Ideal for 3D printers, CNC machines, laser engravers, linear actuators, and automation projects.
This NEMA 17 bipolar stepper motor uses a 4-wire configuration to deliver accurate positioning and smooth speed control. With low noise, low heat generation, and good acceleration performance, it’s a dependable choice for both hobbyist and professional motion systems.
Looking for a longer body with higher torque? We also carry the 42 × 42 × 48 mm version.
What you can build
- 3D printer motion axes (X/Y/Z) and extruders
- CNC router movement and lead-screw drives
- Laser cutter/engraver motion rails
- Linear actuators and sliders
- Robotics joints and mechanisms
- Automation prototypes and positioning rigs
Technical specifications
| Motor type | 2-phase hybrid bipolar stepper motor |
|---|---|
| NEMA size | NEMA 17 |
| Step angle | 1.8° (200 steps/rev) |
| Rated voltage | 7–24 V (driver-dependent) |
| Rated current | Up to 1.7 A per phase |
| Phase resistance | 5.75 Ω |
| Inductance | 9.3 mH |
| Holding torque | 28 N·cm (≈ 3.2 kg·cm) |
| Shaft diameter | 5 mm |
| Body length | 34 mm |
| Weight | ~300 g |
| Model | 42HB34F08AB |
| Dimensions | 42 × 42 × 34 mm |
Wiring (Bipolar – 4 wires)
- Blue: A+
- Red: A−
- Green: B+
- Black: B−
Use a proper stepper driver (A4988, DRV8825, TB6600, etc.). Don’t drive the motor directly from a microcontroller pin.
Tip: If the motor vibrates but doesn’t rotate, swap one coil pair (A+/A−) or (B+/B−).
Quick links
FAQ
Quick answers for choosing drivers, wiring, and what “NEMA 17” really means.
What is a NEMA 17 stepper motor used for?
NEMA 17 is a mounting size standard (face plate size), not a torque rating. This size is commonly used for 3D printers, CNC machines, laser engravers, linear actuators, and precision positioning projects.
How do I control speed and direction?
Use a stepper driver (A4988/DRV8825/TB6600) and send STEP pulses for speed plus DIR for direction. Acceleration control (ramping) makes motion smoother and prevents missed steps.
Can I connect this directly to Arduino / ESP32 pins?
No—this motor needs more current than GPIO pins can provide. Always use a proper stepper driver and a suitable external power supply.
My motor is shaking but not turning—what should I check?
That usually means one coil is mis-paired. Confirm A+/A− and B+/B− are correct. If needed, swap a pair, and make sure your driver current limit is set correctly.
What does 1.8° step angle mean?
1.8° means 200 full steps per revolution (360° / 1.8° = 200). With microstepping on the driver, motion becomes smoother and you get finer positioning.
Stepper NEMA 17 Bipolar Motor 42×42×34 mm
Stepper NEMA 17 Bipolar Motor 42×42×34 mm
Out of stock
Product Code
SKU:2392
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