Pololu NEMA 17 Bipolar Stepper Motor — 200 Steps/Rev, 2.8V, 1.7A/Phase, 42×38mm

A reliable “workhorse” NEMA 17 for CNC, 3D motion builds, and robotics. The Pololu Stepper Motor is a hybrid bipolar stepper with a 1.8° step angle (200 steps per revolution). Each coil is rated 1.68–1.7A at 2.8V, delivering a holding torque of 3.7 kg·cm (51 oz·in). It comes with 4 color-coded wires (bare leads) and a 5mm D-shaft supported by two ball bearings for smoother, more stable rotation.

Precision steps: 1.8° step angle = 200 steps/rev for accurate positioning.
Strong torque: holding torque 3.7 kg·cm (51 oz·in).
Driver-ready: works with bipolar stepper drivers and controllers (recommended vs discrete H-bridges).
Easy wiring: 4 leads, 30cm long; two coils are pre-identified by color.

Important notes (to avoid confusion):

Rated voltage is not your supply voltage: 2.8V is the coil rating at 1.68A. Most stepper systems use a higher supply voltage (e.g., 12V/24V) with a current-limiting stepper driver to get better speed/torque performance.
Match the driver current: choose a driver/controller that can handle ~1.7A/phase and set the current limit properly.

Why/Benefits

Great default NEMA 17

Solid size/torque balance for many 3D motion builds
Common 5mm D-shaft makes coupling and hubs easier
Ball-bearing supported shaft for smoother rotation

Easy to integrate

Color-coded coil pairs for quick wiring
Compatible with popular stepper drivers and Pololu Tic controllers
30cm leads help with chassis routing

Technical specifications

Product	Pololu Stepper Motor: Bipolar, 200 Steps/Rev, 42×38mm, 2.8V, 1.7 A/Phase
Frame size	NEMA 17 — 42.3mm square × 38mm (not including shaft)
Step angle	1.8° (200 steps/revolution)
Motor type	Hybrid bipolar stepper, 4-wire
Current rating	1.68 A per coil
Voltage rating	2.8 V
Resistance	1.65 Ω per coil
Inductance	3.2 mH per coil
Holding torque	3.7 kg·cm (51 oz·in)
Shaft	5mm D-shaft (flat is 0.5mm)
Lead length	30 cm
Weight	285 g
Shaft support	Two ball bearings

Pinout & power notes

Coil pairing (color-coded): Black + Green = one coil, Red + Blue = the other coil.
How to drive: use a bipolar stepper motor driver (recommended) or a controller like Pololu Tic.
Current limit: set your driver to ~1.7A/phase (or lower if you want cooler operation).

FAQ

Is this compatible with Arduino/ESP32?

Yes—use Arduino/ESP32 to control a stepper driver/controller (STEP/DIR or a smarter controller). The motor itself must be driven by a current-limiting stepper driver, not directly from GPIO.
Why is the motor “2.8V” but people use 12V/24V supplies?

2.8V is the coil rating at 1.68A. With a proper stepper driver, you can use higher supply voltages while limiting coil current—this improves speed/torque performance.
Which wires go together?

Black + Green are one coil; Red + Blue are the other.

Stepper Motor: Bipolar, 200 Steps/Rev, 42×38mm, 2.8V, 1.7 A/Phase

Name: Stepper Motor: Bipolar, 200 Steps/Rev, 42×38mm, 2.8V, 1.7 A/Phase
Brand: circuitrocks
SKU: POL2267
Price: 2947.0 PHP
Availability: InStock