# Differential screw, M8×1.25 / M8×1 (concept rod)

> What is a differential screw?

- Category: Hardware › Mechanism parts
- Kind: Modern device
- Basis: Xem Studio drawing
- Page: https://xemstudio.com/objects/differential-screw-m8/ · JSON: https://xemstudio.com/api/geometry?object=differential-screw-m8 · Plain text: https://xemstudio.com/objects/differential-screw-m8/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

- One rod with two threads of slightly different pitch (here 1.25 and 1.0 mm): turning it once moves one nut relative to the other by the difference, 0.25 mm.

## Sizes

| dimension | value |
|---|---|
| pitch A | 1.25 mm |
| pitch B | 1.0 mm |
| advance per turn | 0.25 mm |

## Where the files are

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

## Questions

**What is a differential screw?**

One rod with two threads of slightly different pitch (here 1.25 and 1.0 mm): turning it once moves one nut relative to the other by the difference, 0.25 mm.

## Fits with

- [Differential screw (fine adjustment)](https://xemstudio.com/objects/differential-screw-mechanism/)