> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt # Stepper Motor: Bipolar, 200 Steps/Rev, 57×56mm, 2.5V, 2.8 A/Phase **Type:** Product page · **SKU:** POLOLU-1474 · **Brand:** [Pololu](https://core-electronics.com.au/brands/pololu-australia) **Page:** https://core-electronics.com.au/stepper-motor-bipolar-200-steps-rev-57-56mm-2-5v-2-8-a-phase.html ([markdown](https://core-electronics.com.au/stepper-motor-bipolar-200-steps-rev-57-56mm-2-5v-2-8-a-phase.html.md)) This NEMA 23-size hybrid bipolar stepping motor has a 1.8° step angle (200 steps/revolution). Each phase draws 2.8 A at 2.5 V, allowing for a holding torque of 13 kg-cm (180 oz-in). > ⚠ Deal is for shelf stock only — any additional stock will be at the normal price. ## Pricing - **Price:** $203.96 (inc GST) — $185.42 AUD, exc GST ## Availability & dispatch - In stock, ships same business day if ordered before 2PM (Australia/Sydney). - We can dispatch 1 today; more stock is typically available with a 4–7 day lead time. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=POLOLU-1474:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart. - **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/POLOLU-1474:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.) - **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there. - **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works) - **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt ## Description | [![](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. | This high-torque hybrid bipolar stepping motor has a 1.8° step angle (200 steps/revolution). Each phase draws 2.8 A at 2.5 V, allowing for a holding torque of 13 kg-cm (180 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 an appropriately powerful [bipolar stepper motor driver](https://core-electronics.com.au/breakout-boards-and-modules/motor-drivers-controllers/stepper-motor-drivers.html), such as Pololu's [High-Power Stepper Motor Driver 36v4](https://core-electronics.com.au/pololu-high-power-stepper-motor-driver-36v4.html), or Pololu's [Tic 36v4 High-Power Stepper Motor Controller](https://core-electronics.com.au/pololu-tic-36v4-usb-multi-interface-high-power-stepper-motor-controller.html). In particular, the Tic makes control easy because it supports six different interfaces (USB, TTL serial, I²C, RC, analog voltages, and quadrature encoder) and is configurable over USB with Pololu's free configuration utility. | [![](https://core-electronics.com.au/attachments/localcontent/0J6183_22306ccfa6d.jpg)](https://core-electronics.com.au/attachments/localcontent/0J6183_2595935f0c9.jpg) | |---| | NEMA 23 stepper motor (item #1475) mounted with a steel L-bracket for NEMA 23 stepper motors. | Pololu's [1/4" universal mounting hub](https://core-electronics.com.au/pololu-universal-aluminum-mounting-hub-for-1-4-shaft-4-40-holes-2-pack.html) and [1/4" scooter wheel adapter](https://core-electronics.com.au/pololu-aluminum-scooter-wheel-adapter-for-1-4-shaft.html) can be used to mount objects on the stepper motor’s 1/4"-diameter output shaft, and Pololu carry a [NEMA 23 steel bracket](https://core-electronics.com.au/steel-l-bracket-for-nema-23-stepper-motors.html) for securely mounting this stepper motor to a flat surface (the picture above shows this bracket being used with a taller NEMA 23 stepper motor). **Specifications** - Size: 56.4 mm square × 56 mm, not including the shaft (NEMA 23) - Weight: 0.7 kg (25 oz) - Shaft diameter: 6.35 mm (0.25") “D” - Steps per revolution: 200 - Current rating: 2.8 A per coil - Voltage rating: 2.5 V - Resistance: 0.9 O per coil - Holding torque: 13 kg-cm (180 oz-in) - Inductance: 2.5 mH per coil - Lead length: 30 cm (12") - Output shaft supported by two ball bearings More specifications are available in the datasheet (49k pdf). **Dimensions** The following diagram shows the stepper motor dimensions in mm. The output D-shaft has a 0.25" (6.35 mm) diameter with a section that is flattened by 0.5 mm (**note:** the diagram below incorrectly lists this flattened width as 6 mm when it is really 5.85 mm). This shaft works with Pololu's [1/4" universal mounting hub](https://core-electronics.com.au/pololu-universal-aluminum-mounting-hub-for-1-4-shaft-4-40-holes-2-pack.html) and [1/4" scooter wheel adapter](https://core-electronics.com.au/pololu-aluminum-scooter-wheel-adapter-for-1-4-shaft.html). | ![](https://core-electronics.com.au/attachments/localcontent/0J4739_24767120ac6.png) | |---| | [![](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 SY57STH56-2804A. **People often buy this product together with:** | [![Pololu Universal Aluminum Mounting Hub for 1/4](https://core-electronics.com.au/attachments/localcontent/0J5002_3605ff5eca.jpg)](https://core-electronics.com.au/pololu-universal-aluminum-mounting-hub-for-1-4-shaft-4-40-holes-2-pack.html) | [Pololu Universal Aluminum Mounting Hub for 1/4" (6.35mm) Shaft, #4-40 Holes (2-Pack)](https://core-electronics.com.au/pololu-universal-aluminum-mounting-hub-for-1-4-shaft-4-40-holes-2-pack.html) | |---|---| | [![Stepper Motor: Bipolar, 200 Steps/Rev, 42×38mm, 2.8V, 1.7 A/Phase](https://core-electronics.com.au/attachments/localcontent/0J5063_3948a41661.jpg)](https://core-electronics.com.au/stepper-motor-bipolar-200-steps-rev-42-38mm-2-8v-1-7-a-phase.html) | [Stepper Motor: Bipolar, 200 Steps/Rev, 42×38mm, 2.8V, 1.7 A/Phase](https://core-electronics.com.au/stepper-motor-bipolar-200-steps-rev-42-38mm-2-8v-1-7-a-phase.html) | |---|---| | [![Steel L-Bracket for NEMA 23 Stepper Motors](https://core-electronics.com.au/attachments/localcontent/0J6182_42964164ec.jpg)](https://core-electronics.com.au/steel-l-bracket-for-nema-23-stepper-motors.html) | [Steel L-Bracket for NEMA 23 Stepper Motors](https://core-electronics.com.au/steel-l-bracket-for-nema-23-stepper-motors.html) | |---|---| **Dimensions** | Size: | 56.4 mm square × 56 mm[1](https://core-electronics.com.au/#note1) | |---|---| | NEMA size: | 23 | | Weight: | 700 g | | Shaft diameter: | 6.35 mm | **General specifications** | Shaft type: | 1/4 inch "D" | |---|---| | Current rating: | 2800 mA[2](https://core-electronics.com.au/#note2) | | Voltage rating: | 2.5 V | | Holding torque: | 180 oz·in | | Steps per revolution: | 200 | | Resistance: | 0.9 Ohm[2](https://core-electronics.com.au/#note2) | | Inductance per phase: | 2.5 mH | | Number of leads: | 4 | | Lead length: | 30 cm | **Notes:** 1Not including the shaft.2Per coil. **File downloads** - **SY57STH56-2804A stepper motor datasheet (49k pdf)** - **3D model of the SY57STH56-2804A stepper motor (Pololu item #1474) (3MB step)** ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/s/t/stepper_motor_bipolar_200_steps_rev_57x56mm_2.5v_2.8_a_phase__pololu_1474__00.jpg)