# Lewis centre piece 10 × 14 × 50, Ø6 pin hole

> What is the centre piece of a lewis?

- 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/lewis-centre-piece-10x14x50/ · JSON: https://xemstudio.com/api/geometry?object=lewis-centre-piece-10x14x50 · Plain text: https://xemstudio.com/objects/lewis-centre-piece-10x14x50/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 |
|---|---|---|
| 10.0 | 14.0 | 50.0 |

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

## Notes

- Parallel-sided 10 × 14 × 50 bar with a Ø6 cross hole 8 mm from its top: driven down between the two side wedges it forces them out against the dovetail's walls; the shackle pin goes through all three pieces.
- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

## Sizes

| dimension | value |
|---|---|
| bar | 10 × 14 × 50 mm |
| hole | Ø6, 8 mm from the top |

## 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. 493: figure, his text and an animation](https://507movements.com/mm_493.html) — web — Publisher's page; dimensions are facts
- Xem Studio: [drawing](https://xemstudio.com/objects/lewis-stone-lifter-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/lewis-centre-piece-10x14x50/index.json · license: https://xemstudio.com/files/hardware/lewis-centre-piece-10x14x50/LICENSE.md

- lewis-centre-piece-10x14x50: [STEP](https://xemstudio.com/files/hardware/lewis-centre-piece-10x14x50/lewis-centre-piece-10x14x50.step) · [STL](https://xemstudio.com/files/hardware/lewis-centre-piece-10x14x50/lewis-centre-piece-10x14x50.stl) — centre piece, z −30..20, pin hole along X at z 12

## Questions

**What is the centre piece of a lewis?**

Parallel-sided 10 × 14 × 50 bar with a Ø6 cross hole 8 mm from its top: driven down between the two side wedges it forces them out against the dovetail's walls; the shackle pin goes through all three pieces.

## Fits with

- [Lewis (three-piece stone lifter in a dovetail hole)](https://xemstudio.com/objects/lewis-stone-lifter-mechanism/)