# Follower bar 8 × 5 with Ø3 roller pin hole (75 mm)

> What is the follower bar of a face 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/cam-follower-bar-roller-pin/ · JSON: https://xemstudio.com/api/geometry?object=cam-follower-bar-roller-pin · Plain text: https://xemstudio.com/objects/cam-follower-bar-roller-pin/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 |
|---|---|---|
| 10.0 | 80.0 | 5.0 |

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

## Notes

- 8 × 5 mm bar, 75 mm long, with a Ø10 round end and a Ø3 hole for the roller pin: rides over the face cam, the roller below it running in the groove; the bar slides in a guide above the cam.
- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

## Sizes

| dimension | value |
|---|---|
| bar | 8 × 5 × 75 mm |
| pin hole | Ø3 |

## 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. 97: figure, his text and an animation](https://507movements.com/mm_097.html) — web — Publisher's page; dimensions are facts
- Xem Studio: [drawing](https://xemstudio.com/objects/grooved-heart-cam-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/cam-follower-bar-roller-pin/index.json

- cam-follower-bar-roller-pin: [STEP](https://xemstudio.com/files/hardware/cam-follower-bar-roller-pin/cam-follower-bar-roller-pin.step) · [STL](https://xemstudio.com/files/hardware/cam-follower-bar-roller-pin/cam-follower-bar-roller-pin.stl) — bar, pin at origin, along +Y

## Questions

**What is the follower bar of a face cam?**

8 × 5 mm bar, 75 mm long, with a Ø10 round end and a Ø3 hole for the roller pin: rides over the face cam, the roller below it running in the groove; the bar slides in a guide above the cam.

## Fits with

- [Grooved heart cam (face cam) with roller follower](https://xemstudio.com/objects/grooved-heart-cam-mechanism/)