> **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

# Ball Bearing Slide Pack for 1121 Series Low-Side U-Channel

**Type:** Product page · **SKU:** GB-3210-0001-0004 · **Brand:** [goBilda](https://core-electronics.com.au/brands/gobilda)
**Page:** https://core-electronics.com.au/ball-bearing-slide-pack-for-1121-series-low-side-u-channel.html ([markdown](https://core-electronics.com.au/ball-bearing-slide-pack-for-1121-series-low-side-u-channel.html.md))

This little kit of parts yields some big build opportunities! The slide pack has all the necessary parts to make one

## Pricing

- **Price:** $42.05 (inc GST) — $38.23 AUD, exc GST
- **Quantity discounts:** 10+ $36.32 (exc GST) · 25+ $34.40 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Aug 21 and Aug 24.

## How to buy

- **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=GB-3210-0001-0004:1` (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-3210-0001-0004:1.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 little kit of parts yields some big build opportunities! The slide pack has all the necessary parts to make one [1121 Series Low-Side U-Channel](https://www.gobilda.com/1121-series-low-side-u-channel/) cascade over another, much like an extension ladder does. Each end contains four bearings so that the two channels you choose to use are locked together and help support one-another. When collapsed, the setup adds a mere 8mm to the overall length of two equal length channels (example, the collapsed length when using 288mm channels is 296mm). The full extension length will be 40mm shy of the sum of the two channels (288mm channels will yield an extended length of 536mm)!

### Kit Contents:

| SKU | Qty | Name |
|---|---|---|
| [GB-1600-0410-0004](https://core-electronics.com.au/1600-series-non-flanged-ball-bearing-4mm-id-x-10mm-od-4mm-thickness-2-pack.html) | 4 | 1600 Series Non-Flanged Ball Bearing (4mm ID x 10mm OD, 4mm Thickness) - 2 Pack |
| [GB-2800-0004-0014](https://core-electronics.com.au/2800-series-zinc-plated-steel-socket-head-screw-m4-x-07mm-14mm-length-25-pack.html) | 1 | 2800 Series Zinc-Plated Steel Socket Head Screw (M4 x 0.7mm, 14mm Length) - 25 Pack |
| [GB-2800-0004-0018](https://core-electronics.com.au/2800-series-zinc-plated-steel-socket-head-screw-m4-x-07mm-18mm-length-25-pack.html) | 1 | 2800 Series Zinc-Plated Steel Socket Head Screw (M4 x 0.7mm, 18mm Length) - 25 Pack |
| [GB-2801-0004-0008](https://core-electronics.com.au/2801-series-zinc-plated-steel-washer-4mm-id-x-8mm-od-25-pack.html) | 1 | 2801 Series Zinc Plated Steel Washer (4mm ID x 8mm OD) - 25 Pack |
| [GB-2807-0407-0250](https://core-electronics.com.au/2807-series-stainless-steel-shim-4mm-id-x-7mm-od-025mm-thickness-12-pack.html) | 1 | 2807 Series Stainless Steel Shim (4mm ID x 7mm OD, 0.25mm Thickness) - 12 Pack |
| [GB-2812-0004-0007](https://core-electronics.com.au/2812-series-zinc-plated-steel-nylon-insert-locknut-m4-x-07mm-7mm-hex-25-pack.html) | 1 | 2812 Series Zinc-Plated Steel Nylon-Insert Locknut (M4 x 0.7mm, 7mm Hex) - 25 Pack |
| 3705-0001-0002 | 1 | Bearing Bracket #1 for GB-3210-0001-0004 (1-2) - 2 Pack |
| 3705-0001-0003 | 1 | Bearing Bracket #2 for GB-3210-0001-0004 (1-3) - 2 Pack |

### Downloads

- [ STEP File ](https://core-electronics.com.au/attachments/localcontent/3210-0001-0004_4408719bb9d.zip)
- [ Assembly Instructions ](https://core-electronics.com.au/attachments/localcontent/3210-0001-0004-assembly-instructions_26458fcfaec.pdf)

### Specs

| Weight | 71g |
|---|---|

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/G/B/GB-3210-0001-0004-1.jpg)