# Oldham coupling centre disc Ø40

> What is the Oldham centre disc?

- Category: Hardware › Mechanism parts
- Kind: Modern device
- Basis: Xem Studio drawing
- Page: https://xemstudio.com/objects/oldham-coupling-disc-40/ · JSON: https://xemstudio.com/api/geometry?object=oldham-coupling-disc-40 · Plain text: https://xemstudio.com/objects/oldham-coupling-disc-40/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); linked files under their publishers' licenses
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

**Exact dimensions.** True size, with no printing tolerance added.

## Notes

- Ø40 × 8 disc with two 8.2 mm slots at 90°, one per face: each hub's tongue slides in one slot.

## Sizes

| dimension | value |
|---|---|
| diameter | 40 mm |
| slots | 8.2 × 4 mm, crossed |

## Where the files are

- Xem Studio: [drawing](https://xemstudio.com/objects/oldham-coupling/) — web — Publisher's page; dimensions are facts

## Free STEP/STL (1 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/oldham-coupling-disc-40/index.json

- oldham-disc-40: [STEP](https://xemstudio.com/files/hardware/oldham-coupling-disc-40/oldham-disc-40.step) · [STL](https://xemstudio.com/files/hardware/oldham-coupling-disc-40/oldham-disc-40.stl) — Centre disc

## Questions

**What is the Oldham centre disc?**

Ø40 × 8 disc with two 8.2 mm slots at 90°, one per face: each hub's tongue slides in one slot.

## Fits with

- [Oldham coupling (parallel-offset shaft coupling)](https://xemstudio.com/objects/oldham-coupling/)