> **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

# Small Reduction Stepper Motor - 12VDC 32-Step Geared

**Type:** Product page · **SKU:** ADA918 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia)
**Page:** https://core-electronics.com.au/small-reduction-stepper-motor-12vdc-48-step-1-16-gearing.html ([markdown](https://core-electronics.com.au/small-reduction-stepper-motor-12vdc-48-step-1-16-gearing.html.md))

This is a great first stepper motor, good for small projects and experimenting with steppers. This uni-polar motor has a built in mounting plate with two mounting...

## Pricing

- **Price:** $12.35 (inc GST) — $11.23 AUD, exc GST
- **Quantity discounts:** 10+ $10.89 (exc GST) · 50+ $10.66 (exc GST)

## Availability & dispatch

- Out of stock — the product page offers email notification when it returns.

## How to buy

- **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=ADA918:1` (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/ADA918:1.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

This is a great first stepper motor, good for small projects and experimenting with steppers. This uni-polar motor has a built in mounting plate with two mounting holes. There are only 32 step (11.25 degree) per revolution, and inside is a 1/16 reduction gear set. (Actually its 1/16.032 but for most purposes 1/16 is a good enough approximation) What this means is that there are really 32\*16.032 steps per revolution = 513 steps! The shaft is flattened so its easy to attach stuff to it with a set-screw. A perfect first stepper motor and works well with the Motor Shield for Arduino.

**We have occasionally received motors with other gear ratios (eg. 1:64, 1:32). Therefore, the motor you receive may not have a 1:16 gear ratio. This can generally be compensated for in your code.**
 
 The gearing has a few side effects which are important to note. First, **you can turn the stepper by hand but not as smoothly as an un-geared stepper**. It also means you shouldn't use interleaved or micro-stepping to control or it will take forever to turn. Instead use single or double stepping. The torque is fairly high but its slower than un-geared steppers - Adafruit maxed out at about 80 RPM when powering with 12VDC and about 50 RPM on 9VDC.
 
 To use with the Adafruit Motor Shield, connect red to ground (middle), orange and pink to one motor port (say M1) and blue and yellow to the other motor port (say M2). So in order, thats: orange - pink - red - blue - yellow. Then just use the example code that comes with the Adafruit Motor Shield library and set the constructor to **Adafruit\_StepperMotor \*myMotor = AFMS.getStepper(513,*motornum*)** and the speed at 5 RPM by calling **motor->setSpeed(5)**. Otherwise, you can also wire it up with some transistors and use the Arduino Stepper library

## Technical Details

- Unipolar stepper with 0.1" spaced 5-pin cable connector
- 32 steps per revolution
- 1/16.025 geared down reduction
- 5V-12V DC suggested operation
- Weight: 37 g.
- Dimensions: 28mm diameter, 20mm tall not including 9mm shaft with 5mm diameter
- 9" / 23 cm long cable
- Holding Torque @ 12VDC: 250 gram-force\*cm, 25 N\*mm/ 3.5 oz-force\*in
- Shaft: 5mm diameter flattened

![](https://core-electronics.com.au/attachments/localcontent/28byj48dimension_3049480a028.jpg)
 ![](https://core-electronics.com.au/attachments/localcontent/28byj48wiring_17600a1d149.jpg)

![](https://core-electronics.com.au/attachments/localcontent/rohs_icon_8216055e11.jpg)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/9/1/918-03.jpg)