> **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

# 3mm Hexagonal Shaft Adapter for LEGO® Wheels (Pair)

**Type:** Product page · **SKU:** POLOLU-1011 · **Brand:** [Pololu](https://core-electronics.com.au/brands/pololu-australia)
**Page:** https://core-electronics.com.au/3mm-hexagonal-shaft-adapter.html ([markdown](https://core-electronics.com.au/3mm-hexagonal-shaft-adapter.html.md))

This adapter allows 3mm hexagonal shafts, the kind found on many Tamiya gearboxes, to be connected to LEGO’s wide variety of high-quality wheels. The adapters are sold in pairs.

## Pricing

- **Price:** $6.65 (inc GST) — $6.05 AUD, exc GST
- **Quantity discounts:** 10+ $5.80 (exc GST) · 25+ $5.62 (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=POLOLU-1011:1` (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-1011:1.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/media/remote_images/0J2139.250_dq8RVz.jpg%3Fe3c40d04c535396f6cbeb3ac406c2c34)![](https://core-electronics.com.au/media/remote_images/zoom-d0cfc0fffa825c4654893ef42b77cee3_P2fx0h.png)](https://core-electronics.com.au/#) |
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## Overview

This adapter makes it possible to use LEGO® wheels with 3mm hexagonal shafts, like the ones found on many [Tamiya gearboxes](https://core-electronics.com.au/#). These are great, inexpensive gearboxes for building small robots, and LEGO® makes a number of very high-quality wheels as part of their Technic and Mindstorms product lines, many of which would also be excellent for use on a small robot. With this adapter, you can integrate LEGO® wheels of your choice into a robot. Pololu sell the adapters in pairs, so that you can make a two-wheeled robot.

| ![](https://core-electronics.com.au/media/remote_images/0J2140.600_Fv1ALl.jpg%3F2f2c4dc6cb68157b94b28dd38a551b8f) |
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## Instructions

1. Fit the adapter onto the hexagonal metal shaft. You will need to push quite hard; be careful not to damage the shaft or gearbox.
2. Slide the adapter into a LEGO® wheel of your choice.

The adapter fits very tightly on the metal shaft, so that it will remain attached to the shaft when the wheel is removed. Pololu recommend that you leave the adapter permanently attached to the metal axle; repeated removal and insertion may loosen the connection, making it more likely to fall off.

| ![](https://core-electronics.com.au/media/remote_images/0J2141.600_HDtxnW.jpg%3F0800e7898341ebfc81a4db1d33d489ec) |
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## Dimensions

The adapter is made of ABS plastic, similar to the plastic used in LEGO® blocks.

The adapter can be used with any LEGO® wheel that accepts a standard axle, as long as the tire does not extend more than 0.35" beyond the inner edge of the hub so that the gearbox body will not rub against the tire.

**LEGO® is a trademark of the LEGO Group of companies, which does not sponsor, authorize, or endorse this site or its products.**

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/3/m/3mm_hexagonal_shaft_adapter_for_lego_wheels__pair___pololu_1011__00.jpg)