# Slotted bar 80 × 20 × 6 for the mangle pinion's shaft (slot from R28 to R52)

> What guides the mangle pinion?

- 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/mangle-slot-bar-r28-52/ · JSON: https://xemstudio.com/api/geometry?object=mangle-slot-bar-r28-52 · Plain text: https://xemstudio.com/objects/mangle-slot-bar-r28-52/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 |
|---|---|---|
| 80.0 | 20.0 | 6.0 |

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

## Notes

- Fixed bar above the pin wheel with a Ø8 hole on the wheel's axis and a 6 mm slot along a radius from 28 to 52 mm: the pinion's Ø6 shaft slides in it, inside the pin circle for one direction and outside for the other.
- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

## Sizes

| dimension | value |
|---|---|
| bar | 80 × 20 × 6 |
| slot | 6 mm, R28 → R52 |
| hole | Ø8 at the wheel axis |

## 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. 36: figure, his text and an animation](https://507movements.com/mm_036.html) — web — Publisher's page; dimensions are facts
- Xem Studio: [drawing](https://xemstudio.com/objects/mangle-wheel-and-pinion-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/mangle-slot-bar-r28-52/index.json · license: https://xemstudio.com/files/hardware/mangle-slot-bar-r28-52/LICENSE.md

- mangle-slot-bar-r28-52: [STEP](https://xemstudio.com/files/hardware/mangle-slot-bar-r28-52/mangle-slot-bar-r28-52.step) · [STL](https://xemstudio.com/files/hardware/mangle-slot-bar-r28-52/mangle-slot-bar-r28-52.stl) — bar, wheel axis at origin, slot along +X, z 0..6

## Questions

**What guides the mangle pinion?**

Fixed bar above the pin wheel with a Ø8 hole on the wheel's axis and a 6 mm slot along a radius from 28 to 52 mm: the pinion's Ø6 shaft slides in it, inside the pin circle for one direction and outside for the other.

## Fits with

- [Mangle wheel and pinion: continuous rotation to reciprocating rotation](https://xemstudio.com/objects/mangle-wheel-and-pinion-mechanism/)