# Cyclograph base plate 180 × 100 × 4 with two Ø3 pin holes 100 mm apart

> What is the cyclograph base?

- 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/cyclograph-base-plate-180x100-c100/ · JSON: https://xemstudio.com/api/geometry?object=cyclograph-base-plate-180x100-c100 · Plain text: https://xemstudio.com/objects/cyclograph-base-plate-180x100-c100/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 |
|---|---|---|
| 180.0 | 100.0 | 4.0 |

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

## Notes

- 180 × 100 × 4 plate standing in for the drawing board, with two Ø3 holes 100 mm apart (the chord's ends) for the guide pins.
- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

## Sizes

| dimension | value |
|---|---|
| plate | 180 × 100 × 4 mm |
| pin holes | 2 × Ø3, 100 mm apart |

## 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. 403: figure, his text and an animation](https://507movements.com/mm_403.html) — web — Publisher's page; dimensions are facts
- Xem Studio: [drawing](https://xemstudio.com/objects/cyclograph-arc-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/cyclograph-base-plate-180x100-c100/index.json · license: https://xemstudio.com/files/hardware/cyclograph-base-plate-180x100-c100/LICENSE.md

- cyclograph-base-plate-180x100-c100: [STEP](https://xemstudio.com/files/hardware/cyclograph-base-plate-180x100-c100/cyclograph-base-plate-180x100-c100.step) · [STL](https://xemstudio.com/files/hardware/cyclograph-base-plate-180x100-c100/cyclograph-base-plate-180x100-c100.stl) — plate, z −4..0, holes at (±50, −28.87)

## Questions

**What is the cyclograph base?**

180 × 100 × 4 plate standing in for the drawing board, with two Ø3 holes 100 mm apart (the chord's ends) for the guide pins.

## Fits with

- [Cyclograph: fixed-angle rules sliding on two pins draw a circular arc](https://xemstudio.com/objects/cyclograph-arc-mechanism/)