# 8-Inch Long-Radius 90° Airflow Duct Elbow

D-Central Technologies design. Release 2026-08-19. SKU `elbow_90_8_v2`.

A 90-degree elbow for the 8-inch run. The centreline turns on a radius rather than a mitre, so the inner wall presents a curve to the stream instead of a corner.

## What it fits

This part interfaces with the fan and duct pattern its geometry is cut for, named on the product page. Compatibility is that interface and nothing wider - a family name is not a blanket claim. Read the Fits row on the product page against your exact machine.

Hydro and immersion machines have no fan face. No part in this line fits them.

## Geometry

| Property | Value |
| --- | --- |
| Bounding box (real mesh) | 304.2 x 208.8 x 304.2 mm |
| Solid volume | 507.32 cm3 |
| Watertight mesh | yes |
| Bodies | 1 |
| Mesh SHA-256 | `72c52e294d579edbba616e7bf257f3406c52507bc65a0206852493f35c8086de` |

Those are the real numbers off the released mesh, not a nominal figure off the drawing.

## Material

**PETG.**

D-Central prints this line in PETG. We offer it in black and orange.

## What is in this download

- `STL/elbow_90_8_v2.stl` - the released mesh
- `MANIFEST.json` - the SHA-256 of every mesh in the package, so you can prove what you got
- `INSTALLATION_AND_SAFETY.md` - how it goes on, and what to check before power comes back
- `LICENSE.md` - CC BY-SA 4.0, the full grant

Verify what you downloaded:

    sha256sum STL/elbow_90_8_v2.stl

and compare it to the value in `MANIFEST.json`.

## Licence

Open source, CC BY-SA 4.0, released by D-Central Technologies. Download it, modify it,
print it, sell what you print, redistribute the files. Credit D-Central Technologies and
keep derivatives under the same licence. Full terms in `LICENSE.md` and at
https://creativecommons.org/licenses/by-sa/4.0/

## Links

- Download centre, every part in the line: https://d-central.tech/3d-models/
- This model on the site: https://d-central.tech/product/dc-shroud-elbow-90-8-v2/
- Fund the work: https://d-central.tech/fund/

We give the files away. Buying the printed part from us, or funding directly, is what
pays for the next design in the line.

D-Central Technologies - https://d-central.tech/
