# Dead-beat (Graham) anchor for the 30-tooth Ø50 escape wheel

> What is a dead-beat anchor?

- 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/deadbeat-anchor-for-30t-d50/ · JSON: https://xemstudio.com/api/geometry?object=deadbeat-anchor-for-30t-d50 · Plain text: https://xemstudio.com/objects/deadbeat-anchor-for-30t-d50/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 |
|---|---|---|
| 44.96 | 25.47 | 3.0 |

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

## Notes

- 3 mm anchor pivoting on a Ø3 pin 35.36 mm above the escape wheel's centre, its two pallets spanning 7½ teeth (90°), each pallet 1.6 mm thick with its impulse face at the deep end. The locking faces are arcs centred on the pivot (entry pallet: outer arc R25.8; exit pallet: inner arc R24.2), so a locked tooth exerts no turning force: the 'dead beat'.
- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

## Sizes

| dimension | value |
|---|---|
| pivot above wheel centre | 35.36 mm |
| span | 7½ teeth (90°) |
| pallet thickness | 1.6 mm |
| pivot hole | Ø3 |
| thickness | 3 mm |

## 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. 289: figure, his text and an animation](https://507movements.com/mm_289.html) — web — Publisher's page; dimensions are facts
- Xem Studio: [drawing](https://xemstudio.com/objects/deadbeat-escapement-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/deadbeat-anchor-for-30t-d50/index.json

- deadbeat-anchor-for-30t-d50: [STEP](https://xemstudio.com/files/hardware/deadbeat-anchor-for-30t-d50/deadbeat-anchor-for-30t-d50.step) · [STL](https://xemstudio.com/files/hardware/deadbeat-anchor-for-30t-d50/deadbeat-anchor-for-30t-d50.stl) — anchor, z 0..3, pivot at (0, 35.36)

## Questions

**What is a dead-beat anchor?**

3 mm anchor pivoting on a Ø3 pin 35.36 mm above the escape wheel's centre, its two pallets spanning 7½ teeth (90°), each pallet 1.6 mm thick with its impulse face at the deep end. The locking faces are arcs centred on the pivot (entry pallet: outer arc R25.8; exit pallet: inner arc R24.2), so a locked tooth exerts no turning force: the 'dead beat'.

## Fits with

- [Dead-beat (Graham) escapement: escape wheel and anchor](https://xemstudio.com/objects/deadbeat-escapement-mechanism/)