# Yoke 52 × 62.64 with a 40 mm wide opening and two 8 × 8 rods

> What does a constant-breadth cam drive?

- Category: Hardware › Mechanism parts
- Kind: Modern device
- Basis: Xem Studio design following Brown's figure (1868); true size, no printing allowance
- Page: https://xemstudio.com/objects/constant-breadth-cam-yoke-40/ · JSON: https://xemstudio.com/api/geometry?object=constant-breadth-cam-yoke-40 · Plain text: https://xemstudio.com/objects/constant-breadth-cam-yoke-40/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); files Xem Studio Design License (free to use and sell from, not to redistribute as files: https://xemstudio.com/license/)
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

## Overall (mm)

| length | width | height |
|---|---|---|
| 132.0 | 62.64 | 8.0 |

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

## Notes

- Frame whose two inner faces are exactly 40 mm apart (the cam's breadth), opening 50.64 mm high, 8 thick, with an 8 × 8 rod 40 long on each side.
- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

## Sizes

| dimension | value |
|---|---|
| opening | 40 × 50.64 mm |
| rods | 2 × 8 × 8 × 40 |
| thickness | 8 mm |

## Where the files are

- Henry T. Brown (1868, public domain): [Five Hundred and Seven Mechanical Movements — scan on archive.org](https://archive.org/details/fivehundredseven00browiala) — web — Publisher's page; dimensions are facts
- 507movements.com: [Brown's movement No. 276: figure, his text and an animation](https://507movements.com/mm_276.html) — web — Publisher's page; dimensions are facts
- Xem Studio: [drawing](https://xemstudio.com/objects/constant-breadth-cam-yoke-mechanism/) — web — Publisher's page; dimensions are facts

## Free STEP/STL (1 parts, Xem Studio Design License, Xem Studio)

Index: https://xemstudio.com/files/hardware/constant-breadth-cam-yoke-40/index.json · license: https://xemstudio.com/files/hardware/constant-breadth-cam-yoke-40/LICENSE.md

- constant-breadth-cam-yoke-40: [STEP](https://xemstudio.com/files/hardware/constant-breadth-cam-yoke-40/constant-breadth-cam-yoke-40.step) · [STL](https://xemstudio.com/files/hardware/constant-breadth-cam-yoke-40/constant-breadth-cam-yoke-40.stl) — yoke centred on the origin, faces at x = ±20

## Questions

**What does a constant-breadth cam drive?**

Frame whose two inner faces are exactly 40 mm apart (the cam's breadth), opening 50.64 mm high, 8 thick, with an 8 × 8 rod 40 long on each side.

## Fits with

- [Constant-breadth cam turning in a yoke (three strokes per turn)](https://xemstudio.com/objects/constant-breadth-cam-yoke-mechanism/)