> **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

# 4007 Series Hyper Coupler (8mm REX Bore to 12mm REX Bore)

**Type:** Product page · **SKU:** GB-4007-4008-4012 · **Brand:** [goBilda](https://core-electronics.com.au/brands/gobilda)
**Page:** https://core-electronics.com.au/4007-series-hyper-coupler-8mm-rex-bore-to-12mm-rex-bore.html ([markdown](https://core-electronics.com.au/4007-series-hyper-coupler-8mm-rex-bore-to-12mm-rex-bore.html.md))

This 8mm REX to 12mm REX coupler is a compact, balanced way to fasten an

## Pricing

- **Price:** $16.90 (inc GST) — $15.36 AUD, exc GST
- **Quantity discounts:** 10+ $14.60 (exc GST) · 25+ $13.83 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Sep 02 and Sep 07.

## How to buy

- **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=GB-4007-4008-4012:1` (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/GB-4007-4008-4012:1.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 8mm REX™ to 12mm REX™ coupler is a compact, balanced way to fasten an [8mm REX™ shaft](https://www.gobilda.com/stainless-steel-rex-shafting-8mm-diameter/) to a [12mm REX™ shaft](https://www.gobilda.com/stainless-steel-rex-shafting-12mm-diameter/). The 21mm overall length allows you to slide the coupler down inside of [1120 Series Channel](https://www.gobilda.com/1120-series-u-channel/) even when one of the two shafts is inserted half-way through the inside cavity. The bores of the coupler are profile-matched to create a positive drive. That, in combination with four pinch bolts, provides an extremely solid connection that is able to hold loads in both the radial and axial directions with ease.

### Downloads

- [ STEP File ](https://core-electronics.com.au/attachments/localcontent/4007-4008-4012_15119b4a642.zip)

### Specs

| Weight | 24g |
|---|---|
| Material | Aluminum |
| Finish | Clear Anodized |
| IP | Patented |

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/G/B/GB-4007-4008-4012-1.jpg)