# Rack guide block 32 × 12 × 20 with an 11.5 × 8 through channel

> What guides the stamp rod?

- 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/rack-guide-block-32x12-ch11-5x8/ · JSON: https://xemstudio.com/api/geometry?object=rack-guide-block-32x12-ch11-5x8 · Plain text: https://xemstudio.com/objects/rack-guide-block-32x12-ch11-5x8/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 |
|---|---|---|
| 32.0 | 12.0 | 20.0 |

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

## Notes

- 32 × 12 × 20 block with an 11.5 × 8 mm channel through it: the module 1 rack (8 wide) slides in it with its back line on line against the channel wall and its tooth tips 0.5 mm clear of the other; two Ø3.4 mounting holes.
- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

## Sizes

| dimension | value |
|---|---|
| block | 32 × 12 × 20 mm |
| channel | 11.5 × 8 mm |
| holes | 2 × Ø3.4 |

## 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. 351: figure, his text and an animation](https://507movements.com/mm_351.html) — web — Publisher's page; dimensions are facts
- Xem Studio: [drawing](https://xemstudio.com/objects/stamp-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/rack-guide-block-32x12-ch11-5x8/index.json · license: https://xemstudio.com/files/hardware/rack-guide-block-32x12-ch11-5x8/LICENSE.md

- rack-guide-block-32x12-ch11-5x8: [STEP](https://xemstudio.com/files/hardware/rack-guide-block-32x12-ch11-5x8/rack-guide-block-32x12-ch11-5x8.step) · [STL](https://xemstudio.com/files/hardware/rack-guide-block-32x12-ch11-5x8/rack-guide-block-32x12-ch11-5x8.stl) — guide, z 0..20, channel along Y at x −1.5..10, z 6..14

## Questions

**What guides the stamp rod?**

32 × 12 × 20 block with an 11.5 × 8 mm channel through it: the module 1 rack (8 wide) slides in it with its back line on line against the channel wall and its tooth tips 0.5 mm clear of the other; two Ø3.4 mounting holes.

## Fits with

- [Stamp lifter: half-toothed pinion raising a rack and letting it fall](https://xemstudio.com/objects/stamp-lifter-mechanism/)