# Stepper Motor: Bipolar, 200 Steps/Rev, 42×38mm, 2.8V, 1.7 A/Phase **Type:** Product page · **SKU:** POLOLU-2267 · **Brand:** [Pololu](https://core-electronics.com.au/brands/pololu-australia) **Page:** https://core-electronics.com.au/stepper-motor-bipolar-200-steps-rev-42-38mm-2-8v-1-7-a-phase.html ([markdown](https://core-electronics.com.au/stepper-motor-bipolar-200-steps-rev-42-38mm-2-8v-1-7-a-phase.html.md)) This NEMA 17-size hybrid bipolar stepping motor has a 1.8° step angle (200 steps/revolution). Each phase draws 1.7 A at 2.8 V, allowing for a holding torque of 3.7 kg-cm (51 oz-in). ## Pricing - **Price:** $69.40 (inc GST) — $63.09 AUD, exc GST - **Quantity discounts:** 6+ $60.56 (exc GST) · 12+ $58.67 (exc GST) ## Availability & dispatch - In stock, ships same business day if ordered before 2PM (Australia/Sydney). - We can dispatch 3 today, and up to 40 more in 4–7 days. ## Description This hybrid bipolar stepping motor has a 1.8° step angle (200 steps/revolution). Each phase draws 1.7 A at 2.8 V, allowing for a holding torque of 3.7 kg-cm (51 oz-in). The motor has four color-coded wires terminated with bare leads: black and green connect to one coil; red and blue connect to the other. It can be controlled by a pair of suitable H-bridges (one for each coil), but Pololu recommend using a [bipolar stepper motor driver](https://core-electronics.com.au/breakout-boards-and-modules/motor-drivers-controllers/stepper-motor-drivers.html) or one of Pololu's [Tic Stepper Motor Controllers](https://core-electronics.com.au/breakout-boards-and-modules/motor-drivers-controllers/stepper-motor-drivers.html). In particular, the Tics make control easy because they support six different interfaces (USB, TTL serial, I²C, RC, analog voltages, and quadrature encoder) and are configurable over USB with Pololu's free configuration utility. | \| [![](https://core-electronics.com.au/attachments/localcontent/0J2469_203747aadb0.jpg)](https://core-electronics.com.au/attachments/localcontent/0J2469_3984935ddfb.jpg) \| \|---\| \| 5mm Pololu universal aluminum mounting hub on a stepper motor with a 5mm-diameter output shaft. \| | \| [![](https://core-electronics.com.au/attachments/localcontent/0J5627_18338ce127b.jpg)](https://core-electronics.com.au/attachments/localcontent/0J5627_527269eb330.jpg) \| \|---\|---\| \| NEMA 17 stepper motor (item #1200) mounted with a Pololu stamped aluminum L-bracket for NEMA 17 stepper motors. \| | |---| | [![](https://core-electronics.com.au/attachments/localcontent/0J2286_1892927f0cd.jpg)](https://core-electronics.com.au/attachments/localcontent/0J2286_1641576afb9.jpg) | |---| | Bipolar stepper motor wires are terminated with bare leads. | | ![](https://core-electronics.com.au/attachments/localcontent/0J2296_2723a56f97.gif) | |---| | Bipolar stepper motor wiring diagram. | Pololu's [5 mm universal mounting hub](https://core-electronics.com.au/pololu-universal-aluminum-mounting-hub-for-5mm-shaft-4-40-holes-2-pack.html) can be used to mount objects on the stepper motor’s 5 mm-diameter output shaft, and Pololu's [NEMA 17 aluminum bracket](https://core-electronics.com.au/pololu-stamped-aluminum-l-bracket-for-nema-17-stepper-motors.html) offers a variety of options for mounting this stepper motor in your project. This NEMA17 stepper motor is also available with threaded rod output shafts in lengths of [18 cm](https://core-electronics.com.au/stepper-motor-with-18cm-lead-screw-bipolar-200-steps-rev-42-38mm-2-8v-1-7-a-phase.html), [28 cm](https://core-electronics.com.au/stepper-motor-with-28cm-lead-screw-bipolar-200-steps-rev-42-38mm-2-8v-1-7-a-phase.html), or [38 cm](https://core-electronics.com.au/stepper-motor-with-38cm-lead-screw-bipolar-200-steps-rev-42-38mm-2-8v-1-7-a-phase.html) that convert its rotations into linear motion of the included traveling nut. **Specifications** - Size: 42.3 mm square × 38 mm, not including the shaft (NEMA 17) - Weight: 285 g (10 oz) - Shaft diameter: 5 mm “D” - Steps per revolution: 200 - Current rating: 1.68 A per coil - Voltage rating: 2.8 V - Resistance: 1.65 O per coil - Holding torque: 3.7 kg-cm (51 oz-in) - Inductance: 3.2 mH per coil - Lead length: 30 cm (12") - Output shaft supported by two ball bearings More specifications are available in the datasheet (39k pdf). **Dimensions** The following diagram shows the stepper motor dimensions in mm. The dimension labeled “length” is 38 mm. The output D-shaft has a 5 mm diameter with a section that is flattened by 0.5 mm. This shaft works with Pololu's [5 mm universal mounting hub](https://core-electronics.com.au/pololu-universal-aluminum-mounting-hub-for-5mm-shaft-4-40-holes-2-pack.html). | ![](https://core-electronics.com.au/attachments/localcontent/0J2980_300255f3c38.jpg) | |---| | [![](https://core-electronics.com.au/attachments/localcontent/0J2297_3186898a777.jpg)](https://core-electronics.com.au/attachments/localcontent/0J2297_246528185f4.jpg) | |---| | The inside of a bipolar stepper motor (SOYO NEMA 14-size). | **Stepper Motor Applications** Stepper motors are generally used in a variety of applications where precise position control is desirable and the cost or complexity of a feedback control system is unwarranted. Here are a few applications where stepper motors are often found: - Printers - CNC machines - 3D printer/prototyping machines (e.g. RepRap) - Laser cutters - Pick and place machines - Linear actuators - Hard drives | [![](https://core-electronics.com.au/attachments/localcontent/0J4511_6816439839d.jpg)](https://core-electronics.com.au/attachments/localcontent/0J4511_16633f7f040.jpg) | |---| | Pololu’s assortment of stepper motors. | **Note:** This stepper motor is SOYO part number SY42STH38-1684A. **People often buy this product together with:** | [![Pololu Universal Aluminum Mounting Hub for 5mm Shaft, #4-40 Holes (2-Pack)](https://core-electronics.com.au/attachments/localcontent/0J2468_33052118e3.jpg)](https://core-electronics.com.au/pololu-universal-aluminum-mounting-hub-for-5mm-shaft-4-40-holes-2-pack.html) | [Pololu Universal Aluminum Mounting Hub for 5mm Shaft, #4-40 Holes (2-Pack)](https://core-electronics.com.au/pololu-universal-aluminum-mounting-hub-for-5mm-shaft-4-40-holes-2-pack.html) | |---|---| | [![Pololu Universal Aluminum Mounting Hub for 5mm Shaft, M3 Holes (2-Pack)](https://core-electronics.com.au/attachments/localcontent/0J2468_33052118e3.jpg)](https://core-electronics.com.au/pololu-universal-aluminum-mounting-hub-for-5mm-shaft-m3-holes-2-pack.html) | [Pololu Universal Aluminum Mounting Hub for 5mm Shaft, M3 Holes (2-Pack)](https://core-electronics.com.au/pololu-universal-aluminum-mounting-hub-for-5mm-shaft-m3-holes-2-pack.html) | |---|---| | [![Pololu Stamped Aluminum L-Bracket for NEMA 17 Stepper Motors](https://core-electronics.com.au/attachments/localcontent/0J5626_2887ef923a.jpg)](https://core-electronics.com.au/pololu-stamped-aluminum-l-bracket-for-nema-17-stepper-motors.html) | [Pololu Stamped Aluminum L-Bracket for NEMA 17 Stepper Motors](https://core-electronics.com.au/pololu-stamped-aluminum-l-bracket-for-nema-17-stepper-motors.html) | |---|---| **Dimensions** | Size: | 42.3 mm square × 38 mm (NEMA 17)[1](https://core-electronics.com.au/#note1) | |---|---| | NEMA size: | 17 | | Weight: | 285 g | | Shaft diameter: | 5 mm | **General specifications** | Shaft type: | 5 mm "D" | |---|---| | Current rating: | 1680 mA[2](https://core-electronics.com.au/#note2) | | Voltage rating: | 2.8 V | | Holding torque: | 51 oz·in | | Steps per revolution: | 200 | | Resistance: | 1.65 Ohm[2](https://core-electronics.com.au/#note2) | | Inductance per phase: | 3.2 mH | | Number of leads: | 4 | | Lead length: | 30 cm | **Notes:** 1Not including the shaft.2Per coil. **File downloads** - **SY42STH38-1684A stepper motor datasheet (39k pdf)** ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/s/t/stepper_motor_bipolar_200_steps_rev_42x38mm_2.8v_1.7_a_phase__pololu_2267__00.jpg)