# Stepper Motor: Unipolar/Bipolar, 200 Steps/Rev, 42×48mm, 4V, 1.2 A/Phase **Type:** Product page · **SKU:** POLOLU-1200 · **Brand:** [Pololu](https://core-electronics.com.au/brands/pololu-australia) **Page:** https://core-electronics.com.au/stepper-motor-unipolar-bipolar-200-steps-rev-42-48mm-4v-1-2-a-phase.html ([markdown](https://core-electronics.com.au/stepper-motor-unipolar-bipolar-200-steps-rev-42-48mm-4v-1-2-a-phase.html.md)) This NEMA 17-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 1.2 A at 4 V, allowing for a holding torque of 3.2 kg-cm (44 oz-in). ## Pricing - **Price:** $97.65 (inc GST) — $88.77 AUD, exc GST - **Quantity discounts:** 6+ $85.22 (exc GST) · 12+ $82.55 (exc GST) ## Availability & dispatch - Available with a lead time — expect dispatch between Aug 20 and Aug 24. ## Description This hybrid stepping motor has a 1.8° step angle (200 steps/revolution). Each phase draws 1.2 A at 4 V, allowing for a holding torque of 3.2 kg-cm (44 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/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/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. | 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. A [similar NEMA17 stepper motor](https://core-electronics.com.au/stepper-motor-bipolar-200-steps-rev-42-38mm-2-8v-1-7-a-phase.html) is available [with a threaded rod output shaft](https://core-electronics.com.au/stepper-motor-with-28cm-lead-screw-bipolar-200-steps-rev-42-38mm-2-8v-1-7-a-phase.html) that converts its rotations into linear motion of the included traveling nut. **Specifications** - Size: 42.3 mm square × 48 mm, not including the shaft (NEMA 17) - Weight: 350 g (13 oz) - Shaft diameter: 5 mm “D” - Steps per revolution: 200 - Current rating: 1.2 A per coil - Voltage rating: 4 V - Resistance: 3.3 O per coil - Holding torque: 3.2 kg-cm (44 oz-in) - Inductance: 2.8 mH per coil - Lead length: 30 cm (12") - Output shaft supported by two ball bearings More specifications are available in the datasheet (189k pdf). **Dimensions** The following diagram shows the stepper motor dimensions in mm. The dimension labeled “length” is 48 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) | |---| **Note:** This stepper motor is SOYO part number SY42STH47-1206A. **People often buy this product together with:** | [![A4988 Stepper Motor Driver Carrier](https://core-electronics.com.au/attachments/localcontent/0J10064_4074c7c4a6.jpg)](https://core-electronics.com.au/a4988-stepper-motor-driver-carrier.html) | [A4988 Stepper Motor Driver Carrier](https://core-electronics.com.au/a4988-stepper-motor-driver-carrier.html) | |---|---| | [![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 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 × 48 mm (NEMA 17)[1](https://core-electronics.com.au/#note1) | |---|---| | NEMA size: | 17 | | Weight: | 350 g | | Shaft diameter: | 5 mm | **General specifications** | Shaft type: | 5 mm "D" | |---|---| | Current rating: | 1200 mA[2](https://core-electronics.com.au/#note2) | | Voltage rating: | 4 V | | Holding torque: | 44 oz·in | | Steps per revolution: | 200 | | Resistance: | 3.3 Ohm[2](https://core-electronics.com.au/#note2) | | Inductance per phase: | 2.8 mH | | Number of leads: | 6 | | Lead length: | 30 cm | **Notes:** 1Not including the shaft.2Per coil. **File downloads** - **SY42STH47-1206A stepper motor datasheet (189k pdf)** ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/s/t/stepper_motor_unipolar_bipolar_200_steps_rev_42x48mm_4v_1.2_a_phase__pololu_1200__00.jpg)