# Trammel cross plate 140 × 140 × 8 with crossed 6.2 mm grooves

> What is the base of an elliptic trammel?

- 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/trammel-cross-plate-140/ · JSON: https://xemstudio.com/api/geometry?object=trammel-cross-plate-140 · Plain text: https://xemstudio.com/objects/trammel-cross-plate-140/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 |
|---|---|---|
| 140.0 | 140.0 | 8.0 |

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

## Notes

- 140 × 140 × 8 plate with two 6.2 mm wide, 5 mm deep grooves crossing at right angles through its centre: each guides a 12 × 6.2 slide block; four Ø3.4 corner holes.
- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

## Sizes

| dimension | value |
|---|---|
| plate | 140 × 140 × 8 mm |
| grooves | 2 × 6.2 wide × 5 deep, crossed |
| holes | 4 × Ø3.4 |

## 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. 152: figure, his text and an animation](https://507movements.com/mm_152.html) — web — Publisher's page; dimensions are facts
- Xem Studio: [drawing](https://xemstudio.com/objects/elliptic-trammel-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/trammel-cross-plate-140/index.json

- trammel-cross-plate-140: [STEP](https://xemstudio.com/files/hardware/trammel-cross-plate-140/trammel-cross-plate-140.step) · [STL](https://xemstudio.com/files/hardware/trammel-cross-plate-140/trammel-cross-plate-140.stl) — plate, z 0..8, grooves on X and Y

## Questions

**What is the base of an elliptic trammel?**

140 × 140 × 8 plate with two 6.2 mm wide, 5 mm deep grooves crossing at right angles through its centre: each guides a 12 × 6.2 slide block; four Ø3.4 corner holes.

## Fits with

- [Elliptic trammel (trammel of Archimedes, ellipsograph)](https://xemstudio.com/objects/elliptic-trammel-mechanism/)