> **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

# Super-Duty Worm Drive Gearbox (28:1 Ratio)

**Type:** Product page · **SKU:** GB-3208-0002-0028 · **Brand:** [goBilda](https://core-electronics.com.au/brands/gobilda)
**Page:** https://core-electronics.com.au/super-duty-worm-drive-gearbox-281-ratio.html ([markdown](https://core-electronics.com.au/super-duty-worm-drive-gearbox-281-ratio.html.md))

This gearbox is built like a brick! Its all-aluminum framework houses massive 12mm bearings to take on 200lbs of load with ease. Its 28:1.....

## Pricing

- **Price:** $259.95 (inc GST) — $236.32 AUD, exc GST
- **Quantity discounts:** 3+ $224.50 (exc GST) · 6+ $212.69 (exc GST)

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 3 today, and up to 50 more in 7–10 days.

## How to buy

- **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=GB-3208-0002-0028:1` (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-3208-0002-0028:1.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 gearbox is built like a brick! Its all-aluminum framework houses massive 12mm bearings to take on 200lbs of load with ease. Its 28:1 ratio reduces the speed of your motor by 28X to provide a tremendous amount of torque. And thanks to its worm setup, its output shaft is locked into place until you send power to your motor. The hub on the top gives you multiple options for mounting a plate, channel or arm.

This kit includes all necessary components, minus a motor, to get you up and running with worm drive action. This kit is compatible with [goBILDA® 5203 Series Yellow Jacket Gear Motors.](https://core-electronics.com.au/gobilda/motion/motors/yellow-jacket-planetary-gear-motors.html)

### Downloads

- [ STEP File ](https://core-electronics.com.au/attachments/localcontent/3208-0002-0028_26548c8efce.zip)
- [ Assembly Instructions ](https://core-electronics.com.au/attachments/localcontent/3208-0002-0028_assembly_instructions_173650a3073.pdf)
- [ Spec Sheet ](https://core-electronics.com.au/attachments/localcontent/3208-0002-0028_spec-sheet_22305d6b552.pdf)
 
### Specs

 | Weight | 502g (1.11lb) (Motor Not Included) |
|---|---|
| Payload | 91kg (200lb) |

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/G/B/GB-3208-0002-0028-1.jpg)