# Cone-clutch sliding cone Ø40, 12.5°, with Ø32 × 4 fork groove, keyed Ø8 bore

> What is the sliding cone of a cone 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/cone-clutch-cone-d40-12-5deg-keyed8/ · JSON: https://xemstudio.com/api/geometry?object=cone-clutch-cone-d40-12-5deg-keyed8 · Plain text: https://xemstudio.com/objects/cone-clutch-cone-d40-12-5deg-keyed8/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 |
|---|---|---|
| 40.0 | 40.0 | 30.0 |

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

## Notes

- Male cone matching the cup (12.5°, Ø40 → Ø32.91 over 16 mm) with a 4 mm groove for the shifting fork; its Ø8 bore has a 2 × 1 keyway so it slides on a feather key and turns with its shaft.
- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

## Sizes

| dimension | value |
|---|---|
| cone | 12.5°, Ø40 → Ø32.91, 16 long |
| fork groove | Ø28 root, 4 wide |
| bore | Ø8, keyway 2 × 1 |

## 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. 47: figure, his text and an animation](https://507movements.com/mm_047.html) — web — Publisher's page; dimensions are facts
- Xem Studio: [drawing](https://xemstudio.com/objects/cone-friction-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/cone-clutch-cone-d40-12-5deg-keyed8/index.json · license: https://xemstudio.com/files/hardware/cone-clutch-cone-d40-12-5deg-keyed8/LICENSE.md

- cone-clutch-cone-d40-12-5deg-keyed8: [STEP](https://xemstudio.com/files/hardware/cone-clutch-cone-d40-12-5deg-keyed8/cone-clutch-cone-d40-12-5deg-keyed8.step) · [STL](https://xemstudio.com/files/hardware/cone-clutch-cone-d40-12-5deg-keyed8/cone-clutch-cone-d40-12-5deg-keyed8.stl) — as drawn in the mechanism's own frame

## Questions

**What is the sliding cone of a cone clutch?**

Male cone matching the cup (12.5°, Ø40 → Ø32.91 over 16 mm) with a 4 mm groove for the shifting fork; its Ø8 bore has a 2 × 1 keyway so it slides on a feather key and turns with its shaft.

## Fits with

- [Cone friction clutch on a feathered shaft](https://xemstudio.com/objects/cone-friction-clutch-mechanism/)