# goBILDA Low-Side U-Channel 144 mm (5 hole)

> goBILDA 1121-series low-side U-channel, 5 hole / 144 mm long: clear-anodized aluminum, 48 mm wide × 12 mm high with 2.5 mm walls, 8 mm grid of Ø4 mm holes plus Ø14 mm bearing holes on a Ø24 mm pattern — seat a bearing on any side for cross axles. 50 g.

- Manufacturer: goBILDA
- Part number: 1121-0005-0144
- Category: Structure & frame
- Canonical page: https://www.xirkit.io/products/gobilda-low-side-u-channel-144-mm-5-hole-1993
- Structured JSON: https://www.xirkit.io/products/gobilda-low-side-u-channel-144-mm-5-hole-1993/data.json
- Source: Xirkit structured parts catalog — every value traced to a cited document; unknowns are explicit.

## Key specifications

| Property | Value |
| --- | --- |
| Structure type | channel |
| System | goBILDA |
| Profile | low-side U-channel 48 × 12 mm |
| Section width | 48 mm |
| Section height | 12 mm |
| Length | 144 mm |
| Wall thickness | 2.5 mm |
| Hole pattern | 8 mm grid of Ø4 mm holes; Ø14 mm holes with Ø24 mm pattern on 24 mm centres; 16 mm and 32 mm patterns |
| Material | Aluminum |
| Finish | Clear Anodized |
| Weight | 50 g |
| Dimensions | 144 × 48 × 12 mm |

## Where to buy

| Supplier | Price | Stock | Checked | URL |
| --- | --- | --- | --- | --- |
| www.gobilda.com | 7.99 USD | in_stock | 2026-09-29 | https://www.gobilda.com/1121-series-low-side-u-channel-5-hole-144mm-length/ |
| www.servocity.com | 7.99 USD | in_stock | 2026-09-29 | https://www.servocity.com/1121-series-low-side-u-channel-5-hole-144mm-length/ |

## FAQ

**How much does the goBILDA Low-Side U-Channel 144 mm cost?**

From $7.99 at www.gobilda.com (2 supplier offers tracked). Prices are observed unit prices before tax and shipping.

**What are the goBILDA Low-Side U-Channel 144 mm dimensions?**

144 × 48 × 12 mm. A STEP model is available for enclosure fit checks.

**Where does this goBILDA Low-Side U-Channel 144 mm data come from?**

Every value in this record is traced to a source — 3 documents including the board and chip datasheets — with the page and table cited per value. Unknowns are left explicit, never guessed.

## Sources

- [goBILDA Low-Side U-Channel 144 mm (5 hole) datasheet](https://www.gobilda.com/1121-series-low-side-u-channel-5-hole-144mm-length/)
- [www.gobilda.com listing](https://www.gobilda.com/1121-series-low-side-u-channel-5-hole-144mm-length/)
- [www.servocity.com listing](https://www.servocity.com/1121-series-low-side-u-channel-5-hole-144mm-length/)

## Part graph

### Alternatives (by use case)

- [goBILDA Open goRAIL 288 mm](https://www.xirkit.io/products/gobilda-open-gorail-288-mm-5bce) — Both serve robot frames and chassis — check the trade-offs; $10.19 vs $7.99
- [goBILDA U-Channel 120 mm (4 hole)](https://www.xirkit.io/products/gobilda-u-channel-120-mm-4-hole-d02e) — Both serve robot frames and chassis — check the trade-offs; $7.99 vs $7.99
- [goBILDA U-Channel 288 mm (11 hole)](https://www.xirkit.io/products/gobilda-u-channel-288-mm-11-hole-9a15) — Both serve robot frames and chassis — check the trade-offs; $14.99 vs $7.99

### Variants

- [goBILDA Low-Side U-Channel 240 mm (9 hole)](https://www.xirkit.io/products/gobilda-low-side-u-channel-240-mm-9-hole-c01f) — Same goBILDA 1121 low-side U-channel (48 × 12 mm, 2.5 mm wall) — 240 mm / 9 holes instead of 144 mm / 5 holes