# Pin-clutch disc Ø50 × 8 with four Ø6 holes on R16, Ø8 bore

> What is a pin clutch?

- 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/pin-clutch-disc-4-holes-50/ · JSON: https://xemstudio.com/api/geometry?object=pin-clutch-disc-4-holes-50 · Plain text: https://xemstudio.com/objects/pin-clutch-disc-4-holes-50/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 |
|---|---|---|
| 50.0 | 50.0 | 8.0 |

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

## Notes

- Ø50 × 8 disc fixed on one shaft with four Ø6 holes on a 16 mm radius: the studs of the sliding disc enter them to lock the two shafts together.
- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

## Sizes

| dimension | value |
|---|---|
| disc | Ø50 × 8 |
| holes | 4 × Ø6 on R16 |
| bore | Ø8 |

## 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. 52: figure, his text and an animation](https://507movements.com/mm_052.html) — web — Publisher's page; dimensions are facts
- Xem Studio: [drawing](https://xemstudio.com/objects/pin-clutch-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/pin-clutch-disc-4-holes-50/index.json · license: https://xemstudio.com/files/hardware/pin-clutch-disc-4-holes-50/LICENSE.md

- pin-clutch-disc-4-holes-50: [STEP](https://xemstudio.com/files/hardware/pin-clutch-disc-4-holes-50/pin-clutch-disc-4-holes-50.step) · [STL](https://xemstudio.com/files/hardware/pin-clutch-disc-4-holes-50/pin-clutch-disc-4-holes-50.stl) — disc, axis Z, z 0..8

## Questions

**What is a pin clutch?**

Ø50 × 8 disc fixed on one shaft with four Ø6 holes on a 16 mm radius: the studs of the sliding disc enter them to lock the two shafts together.

## Fits with

- [Pin (stud) clutch: studs on a sliding disc enter holes in a fixed disc](https://xemstudio.com/objects/pin-clutch-mechanism/)