# Stamp: 8 × 8 stem 160 long with a 48 × 10 tappet and a 16 × 30 head

> What is a stamp?

- 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/stamp-stem-8x8-160-tappet-head/ · JSON: https://xemstudio.com/api/geometry?object=stamp-stem-8x8-160-tappet-head · Plain text: https://xemstudio.com/objects/stamp-stem-8x8-160-tappet-head/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 |
|---|---|---|
| 52.0 | 190.0 | 8.0 |

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

## Notes

- Vertical 8 × 8 stem running in two guides, with a tappet that the cam lifts and a heavy head at the foot that falls on the work.
- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

## Sizes

| dimension | value |
|---|---|
| stem | 8 × 8 × 160 |
| tappet | 48 × 10 at 60 mm |
| head | 16 × 30 |

## 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. 85: figure, his text and an animation](https://507movements.com/mm_085.html) — web — Publisher's page; dimensions are facts
- Xem Studio: [drawing](https://xemstudio.com/objects/stamp-cam-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/stamp-stem-8x8-160-tappet-head/index.json · license: https://xemstudio.com/files/hardware/stamp-stem-8x8-160-tappet-head/LICENSE.md

- stamp-stem-8x8-160-tappet-head: [STEP](https://xemstudio.com/files/hardware/stamp-stem-8x8-160-tappet-head/stamp-stem-8x8-160-tappet-head.step) · [STL](https://xemstudio.com/files/hardware/stamp-stem-8x8-160-tappet-head/stamp-stem-8x8-160-tappet-head.stl) — as drawn in the mechanism's own frame

## Questions

**What is a stamp?**

Vertical 8 × 8 stem running in two guides, with a tappet that the cam lifts and a heavy head at the foot that falls on the work.

## Fits with

- [Cams lifting a stamp that drops by its own weight](https://xemstudio.com/objects/stamp-cam-mechanism/)