# Stepper Motor: Unipolar/Bipolar, 200 Steps/Rev, 57×76mm, 8.6V, 1 A/Phase **Type:** Product page · **SKU:** POLOLU-1477 · **Brand:** [Pololu](https://core-electronics.com.au/brands/pololu-australia) **Page:** https://core-electronics.com.au/stepper-motor-unipolar-bipolar-200-steps-rev-57-76mm-8-6v-1-a-phase.html ([markdown](https://core-electronics.com.au/stepper-motor-unipolar-bipolar-200-steps-rev-57-76mm-8-6v-1-a-phase.html.md)) This NEMA 23-size hybrid stepping motor can be used as a unipolar or bipolar stepper motor and has a 1.8° step angle (200 steps/revolution). Each phase draws 1 A at 8.6 V, allowing for a holding torque of 14 kg-cm (190 oz-in). ## Pricing - **Price:** $289.95 (inc GST) — $263.59 AUD, exc GST - **Quantity discounts:** 3+ $255.68 (exc GST) · 5+ $250.41 (exc GST) ## Availability & dispatch - Available with a lead time — expect dispatch between Aug 17 and Aug 20. ## Description | [![](https://core-electronics.com.au/attachments/localcontent/0J2977_13939d2264e.jpg)](https://core-electronics.com.au/attachments/localcontent/0J2977_11248715419.jpg) | |---| | 6-lead, unipolar/bipolar stepper motor wires are terminated with bare leads. | | ![](https://core-electronics.com.au/attachments/localcontent/0J2979_18200c4621.gif) | |---| | 6-lead, unipolar/bipolar stepper motor wiring diagram. | This high-torque hybrid stepping motor has a 1.8° step angle (200 steps/revolution). Each phase draws 1 A at 8.6 V, allowing for a holding torque of 14 kg-cm (190 oz-in). The motor has six color-coded wires terminated with bare leads that allow it to be controlled by both unipolar and bipolar stepper motor drivers. When used with a unipolar stepper motor driver, all six leads are used. When used with a bipolar stepper motor driver, the center-tap yellow and white wires can be left disconnected (the red-blue pair gives access to one coil and the black-green pair gives access to the other coil). Pololu recommend using it as a bipolar stepper motor and controlling it with one of Pololu's [bipolar stepper motor drivers](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/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. **Specifications** - Size: 56.4 mm square × 76 mm, not including the shaft (NEMA 23) - Weight: 1 kg (35 oz) - Shaft diameter: 6.35 mm (0.25") “D” - Steps per revolution: 200 - Current rating: 1 A per coil - Voltage rating: 8.6 V - Resistance: 8.6 O per coil - Holding torque: 14 kg-cm (190 oz-in) - Inductance: 14 mH per coil - Lead length: 30 cm (12") - Output shaft supported by two ball bearings More specifications are available in the datasheet (28k 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. 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/0J4513_31117c2a936.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 SY57STH76-1006A. **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) | |---|---| | [![DRV8825 Stepper Motor Driver Carrier, High Current (Header Pins Soldered)](https://core-electronics.com.au/attachments/localcontent/0J5806_51884b4649.jpg)](https://core-electronics.com.au/drv8825-stepper-motor-driver-carrier-high-current-header-pins-soldered.html) | [DRV8825 Stepper Motor Driver Carrier, High Current (Header Pins Soldered)](https://core-electronics.com.au/drv8825-stepper-motor-driver-carrier-high-current-header-pins-soldered.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 × 76 mm[1](https://core-electronics.com.au/#note1) | |---|---| | NEMA size: | 23 | | Weight: | 1000 g | | Shaft diameter: | 6.35 mm | **General specifications** | Shaft type: | 1/4 inch "D" | |---|---| | Current rating: | 1000 mA[2](https://core-electronics.com.au/#note2) | | Voltage rating: | 8.6 V | | Holding torque: | 190 oz·in | | Steps per revolution: | 200 | | Resistance: | 8.6 Ohm[2](https://core-electronics.com.au/#note2) | | Inductance per phase: | 14 mH | | Number of leads: | 6 | | Lead length: | 30 cm | **Notes:** 1Not including the shaft.2Per coil. **File downloads** - **SY57STH76-1006A stepper motor datasheet (28k pdf)** - **3D model of the SY57STH76-1006A stepper motor (Pololu item #1477) (3MB step)** ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/s/t/stepper_motor_unipolar_bipolar_200_steps_rev_57x76mm_8.6v_1_a_phase__pololu_1477__00.jpg)