# Feed pawl for the 24-tooth Ø40 ratchet (pivot 30 mm from the wheel axis)

> What shape is a ratchet feed pawl?

- 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/ratchet-feed-pawl-24t-d40/ · JSON: https://xemstudio.com/api/geometry?object=ratchet-feed-pawl-24t-d40 · Plain text: https://xemstudio.com/objects/ratchet-feed-pawl-24t-d40/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 |
|---|---|---|
| 18.39 | 8.0 | 6.0 |

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

## Notes

- 6 mm pawl with a Ø8 boss on a Ø3 pivot and a narrow nose whose end face is cut to lie on the steep face of a 3 mm ratchet tooth over 80 % of its depth (2.4 mm): it drives the wheel through face contact, not a point. Pivot to nose 14.39 mm; designed for a pivot 30 mm from the wheel's axis.
- The same face-contact pawl design as the ratchet-wheel pawls (pawl-24t-d40), drawn here for a feed lever's pivot.
- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

## Sizes

| dimension | value |
|---|---|
| pivot hole | Ø3, Ø8 boss |
| pivot to nose | 14.39 mm |
| nose face | 2.4 mm, on the tooth's steep face |
| thickness | 6 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. 225: figure, his text and an animation](https://507movements.com/mm_225.html) — web — Publisher's page; dimensions are facts
- Xem Studio: [drawing](https://xemstudio.com/objects/ratchet-feed-lever-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/ratchet-feed-pawl-24t-d40/index.json

- ratchet-feed-pawl-24t-d40: [STEP](https://xemstudio.com/files/hardware/ratchet-feed-pawl-24t-d40/ratchet-feed-pawl-24t-d40.step) · [STL](https://xemstudio.com/files/hardware/ratchet-feed-pawl-24t-d40/ratchet-feed-pawl-24t-d40.stl) — pawl, pivot at origin, nose on +X, z 0..6

## Questions

**What shape is a ratchet feed pawl?**

6 mm pawl with a Ø8 boss on a Ø3 pivot and a narrow nose whose end face is cut to lie on the steep face of a 3 mm ratchet tooth over 80 % of its depth (2.4 mm): it drives the wheel through face contact, not a point. Pivot to nose 14.39 mm; designed for a pivot 30 mm from the wheel's axis.

## Fits with

- [Ratchet wheel stepped by a swinging pawl lever](https://xemstudio.com/objects/ratchet-feed-lever-mechanism/)