> **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

# 20mm Height Metal Caster Bearing Wheel

**Type:** Product page · **SKU:** ADA3948 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia)
**Page:** https://core-electronics.com.au/20mm-height-metal-caster-bearing-wheel.html ([markdown](https://core-electronics.com.au/20mm-height-metal-caster-bearing-wheel.html.md))

Get your 'bot rolling with this durable and smooth steel ball caster. Adafruit like the size (not too big, not too small) and surprisingly fluid motion of this caster...

## Pricing

- **Price:** $7.25 (inc GST) — $6.59 AUD, exc GST
- **Quantity discounts:** 10+ $6.39 (exc GST) · 50+ $6.26 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Sep 03 and Sep 07.

## How to buy

- **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=ADA3948:1` (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/ADA3948:1.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

Get your 'bot rolling with this durable and smooth steel ball caster. Adafruit like the size (not too big, not too small) and surprisingly fluid motion of this caster. It's also really easy to attach, with two screw mounts that will allow you to attach it to any chassis material. **Note that it doesn't come with any mounting hardware**, use 4-40 or M3 screws to attach to whatever you like.

[Matches perfectly with Adafruit's purple metal chassis](https://core-electronics.com.au/purple-aluminum-chassis-for-tt-motors-2wd.html), but can be used for anything where you want 20mm of height.

[We also have a smaller ball caster, with 20mm height, for little bots!](https://core-electronics.com.au/16mm-height-metal-caster-bearing-wheel.html)

## Technical Details

- Wheel Diameter: 15.7mm
- Overall Height: 20mm
- Fixed Hole Diameter (below bearing wheel): 3.1mm
- Mounting Hole Diameter: 4mm
- Mounting Holes Distance: 40mm
- Overall Weight: 19.7g

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/a/d/ada3948-1.jpg)