# Slotted yoke for a Ø30 eccentric (30 mm slot), with rod

> What is an eccentric yoke?

- 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/eccentric-slotted-yoke-30/ · JSON: https://xemstudio.com/api/geometry?object=eccentric-slotted-yoke-30 · Plain text: https://xemstudio.com/objects/eccentric-slotted-yoke-30/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/)

## Overall (mm)

| length | width | height |
|---|---|---|
| 56.0 | 82.0 | 8.0 |

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

## Notes

- Rectangular frame whose inner faces are exactly 30 mm apart (the eccentric's diameter) and 44 mm long, with an 8 × 8 rod and a Ø3 end hole: the eccentric turns inside and the frame moves straight, harmonically, without a strap.
- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

## Sizes

| dimension | value |
|---|---|
| slot | 30 × 44 mm |
| frame | 56 × 42 × 8 mm |
| rod | 8 × 8 × 40, Ø3 hole |

## 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. 90: figure, his text and an animation](https://507movements.com/mm_090.html) — web — Publisher's page; dimensions are facts
- Xem Studio: [drawing](https://xemstudio.com/objects/eccentric-and-slotted-yoke-mechanism/) — web — Publisher's page; dimensions are facts

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

Index: https://xemstudio.com/files/hardware/eccentric-slotted-yoke-30/index.json

- eccentric-slotted-yoke-30: [STEP](https://xemstudio.com/files/hardware/eccentric-slotted-yoke-30/eccentric-slotted-yoke-30.step) · [STL](https://xemstudio.com/files/hardware/eccentric-slotted-yoke-30/eccentric-slotted-yoke-30.stl) — yoke, z 0..8, moves along Y

## Questions

**What is an eccentric yoke?**

Rectangular frame whose inner faces are exactly 30 mm apart (the eccentric's diameter) and 44 mm long, with an 8 × 8 rod and a Ø3 end hole: the eccentric turns inside and the frame moves straight, harmonically, without a strap.

## Fits with

- [Eccentric in a slotted yoke (harmonic straight-line motion)](https://xemstudio.com/objects/eccentric-and-slotted-yoke-mechanism/)