# Stepper Motor: Bipolar, 200 Steps/Rev, 35×26mm, 7.4V, 0.28 A/Phase

**Type:** Product page · **SKU:** POLOLU-1207 · **Brand:** [Pololu](https://core-electronics.com.au/brands/pololu-australia)
**Page:** https://core-electronics.com.au/stepper-motor-bipolar-200-steps-rev-35-26mm-7-4v-0-28-a-phase.html ([markdown](https://core-electronics.com.au/stepper-motor-bipolar-200-steps-rev-35-26mm-7-4v-0-28-a-phase.html.md))

This NEMA 14-size hybrid bipolar stepping motor has a 1.8° step angle (200 steps/revolution). Each phase draws 280 mA at 7.4 V, allowing for a holding torque of 650 g-cm (9 oz-in).

## Pricing

- **Price:** $74.10 (inc GST) — $67.36 AUD, exc GST
- **Quantity discounts:** 6+ $64.67 (exc GST) · 12+ $62.65 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Sep 01 and Sep 04.

## Description

This hybrid bipolar stepping motor has a 1.8° step angle (200 steps/revolution). Each phase draws 280 mA at 7.4 V, allowing for a holding torque of 650 g-cm (9 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/0J6109_163388fde7d.jpg)](https://core-electronics.com.au/attachments/localcontent/0J6109_515918b0ec9.jpg) \| \|---\|---\| \| NEMA 14 stepper motor (item #1207) mounted with a Pololu stamped aluminum L-bracket for NEMA 14 stepper motors. \| |
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| [![](https://core-electronics.com.au/attachments/localcontent/0J2286_1892927f0cd.jpg)](https://core-electronics.com.au/attachments/localcontent/0J2286_1641576afb9.jpg) |
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| Bipolar stepper motor wires are terminated with bare leads. |

| ![](https://core-electronics.com.au/attachments/localcontent/0J2296_2723a56f97.gif) |
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| 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 14 aluminum bracket](https://core-electronics.com.au/pololu-stamped-aluminum-l-bracket-for-nema-14-stepper-motors.html) offers a variety of options for mounting this stepper motor in your project.

**Specifications**

- Size: 35 mm square × 26 mm, not including the shaft (NEMA 14)
- Weight: 130 g (4.5 oz)
- Shaft diameter: 5 mm “D”
- Steps per revolution: 200
- Current rating: 280 mA per coil
- Voltage rating: 7.4 V
- Resistance: 26 O per coil
- Holding torque: 650 g-cm (9 oz-in)
- Inductance: 19.2 mH per coil
- Lead length: 30 cm (12")
- Output shaft supported by two ball bearings

More specifications are available in the datasheet (37k pdf).

**Dimensions**

The following diagram shows the stepper motor dimensions in mm. The dimension labeled “length” is 26 mm. The output D-shaft has a length of 21 mm and 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/0J2292_4190910c00a.jpg) |
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| [![](https://core-electronics.com.au/attachments/localcontent/0J2297_3186898a777.jpg)](https://core-electronics.com.au/attachments/localcontent/0J2297_246528185f4.jpg) |
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| 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) |
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| Pololu’s assortment of stepper motors. |

**Note:** This stepper motor is SOYO part number SY35ST26-0284A.

**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) |
|---|---|

| [![Stepper Motor: Bipolar, 200 Steps/Rev, 35×28mm, 10V, 0.5 A/Phase](https://core-electronics.com.au/attachments/localcontent/0J2284_41967a4b53.jpg)](https://core-electronics.com.au/stepper-motor-bipolar-200-steps-rev-35-28mm-10v-0-5-a-phase.html) | [Stepper Motor: Bipolar, 200 Steps/Rev, 35×28mm, 10V, 0.5 A/Phase](https://core-electronics.com.au/stepper-motor-bipolar-200-steps-rev-35-28mm-10v-0-5-a-phase.html) |
|---|---|

**Dimensions**

 | Size: | 35 mm square × 26 mm[1](https://core-electronics.com.au/#note1) |
|---|---|
| NEMA size: | 14 |
| Weight: | 130 g |
| Shaft diameter: | 5 mm |

**General specifications**

 | Shaft type: | 5 mm "D" |
|---|---|
| Current rating: | 280 mA[2](https://core-electronics.com.au/#note2) |
| Voltage rating: | 7.4 V |
| Holding torque: | 9 oz·in |
| Steps per revolution: | 200 |
| Resistance: | 26 Ohm[2](https://core-electronics.com.au/#note2) |
| Inductance per phase: | 19.2 mH |
| Number of leads: | 4 |
| Lead length: | 30 cm |

**Notes:**

1Not including the shaft.2Per coil. **File downloads**

- **SY35ST26-0284A stepper motor datasheet (37k pdf)**
- **3D model of the SY35ST26-0284A stepper motor (Pololu item #1207) (3MB step)**

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/s/t/stepper_motor_bipolar_200_steps_rev_35x26mm_7.4v_0.28_a_phase__pololu_1207__00.jpg)