# Two-roller cam yoke, roller pins 44 mm apart, 8 × 8 rods

> What holds the rollers of a constant-diameter cam?

- 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/two-roller-cam-yoke-44-rods-8/ · JSON: https://xemstudio.com/api/geometry?object=two-roller-cam-yoke-44-rods-8 · Plain text: https://xemstudio.com/objects/two-roller-cam-yoke-44-rods-8/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 |
|---|---|---|
| 142.0 | 18.0 | 5.0 |

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

## Notes

- 5 mm plate with two Ø3 holes 44 mm apart for the roller pins, a 28 × 10 slot clearing the Ø8 cam shaft over the whole stroke, and an 8 mm rod 40 long at each end; it sits 0.5 mm above the cam and the rollers hang under it on their pins.
- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

## Sizes

| dimension | value |
|---|---|
| roller pins | 2 × Ø3, 44 mm apart |
| shaft slot | 28 × 10 |
| rods | 2 × 8 × 40 |
| plate | 5 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. 117: figure, his text and an animation](https://507movements.com/mm_117.html) — web — Publisher's page; dimensions are facts
- Xem Studio: [drawing](https://xemstudio.com/objects/cam-between-rollers-yoke-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/two-roller-cam-yoke-44-rods-8/index.json · license: https://xemstudio.com/files/hardware/two-roller-cam-yoke-44-rods-8/LICENSE.md

- two-roller-cam-yoke-44: [STEP](https://xemstudio.com/files/hardware/two-roller-cam-yoke-44-rods-8/two-roller-cam-yoke-44.step) · [STL](https://xemstudio.com/files/hardware/two-roller-cam-yoke-44-rods-8/two-roller-cam-yoke-44.stl) — yoke, pins at (±22, 0), plate z 4.5..9.5

## Questions

**What holds the rollers of a constant-diameter cam?**

5 mm plate with two Ø3 holes 44 mm apart for the roller pins, a 28 × 10 slot clearing the Ø8 cam shaft over the whole stroke, and an 8 mm rod 40 long at each end; it sits 0.5 mm above the cam and the rollers hang under it on their pins.

## Fits with

- [Constant-diameter cam between two rollers in a yoke](https://xemstudio.com/objects/cam-between-rollers-yoke-mechanism/)