# Crank disc Ø36 × 5, Ø5 bore, Ø3 pin hole at 12 mm

> What is this crank disc?

- 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/crank-disc-36-pin-r12/ · JSON: https://xemstudio.com/api/geometry?object=crank-disc-36-pin-r12 · Plain text: https://xemstudio.com/objects/crank-disc-36-pin-r12/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 |
|---|---|---|
| 36.0 | 36.0 | 5.0 |

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

## Notes

- Ø36 × 5 disc with a Ø5 shaft bore and a Ø3 crank-pin hole on a 12 mm radius (24 mm stroke).
- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

## Sizes

| dimension | value |
|---|---|
| disc | Ø36 × 5 mm |
| bore | Ø5 |
| pin radius | 12 mm (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. 220: figure, his text and an animation](https://507movements.com/mm_220.html) — web — Publisher's page; dimensions are facts
- Xem Studio: [drawing](https://xemstudio.com/objects/offset-slotted-crank-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/crank-disc-36-pin-r12/index.json

- crank-disc-36-r12: [STEP](https://xemstudio.com/files/hardware/crank-disc-36-pin-r12/crank-disc-36-r12.step) · [STL](https://xemstudio.com/files/hardware/crank-disc-36-pin-r12/crank-disc-36-r12.stl) — disc, z 0..5

## Questions

**What is this crank disc?**

Ø36 × 5 disc with a Ø5 shaft bore and a Ø3 crank-pin hole on a 12 mm radius (24 mm stroke).

## Fits with

- [Offset cranks with slotted arm (variable-speed coupling, Whitworth principle)](https://xemstudio.com/objects/offset-slotted-crank-mechanism/)