# Follower guide block 30 × 16 × 6 for an 8 mm wide follower

> What is a follower guide?

- 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/follower-guide-block-8/ · JSON: https://xemstudio.com/api/geometry?object=follower-guide-block-8 · Plain text: https://xemstudio.com/objects/follower-guide-block-8/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 |
|---|---|---|
| 30.0 | 16.0 | 6.0 |

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

## Notes

- 30 × 16 × 6 block with an 8 mm wide through slot that guides a cam follower rod on a straight radial line; two Ø3.4 (M3 clearance) holes.
- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

## Sizes

| dimension | value |
|---|---|
| block | 30 × 16 × 6 mm |
| slot | 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. 138: figure, his text and an animation](https://507movements.com/mm_138.html) — web — Publisher's page; dimensions are facts
- Xem Studio: [drawing](https://xemstudio.com/objects/plate-cam-knife-edge-follower-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/follower-guide-block-8/index.json

- follower-guide-block-8: [STEP](https://xemstudio.com/files/hardware/follower-guide-block-8/follower-guide-block-8.step) · [STL](https://xemstudio.com/files/hardware/follower-guide-block-8/follower-guide-block-8.stl) — guide block, slot along Y

## Questions

**What is a follower guide?**

30 × 16 × 6 block with an 8 mm wide through slot that guides a cam follower rod on a straight radial line; two Ø3.4 (M3 clearance) holes.

## Fits with

- [Plate cam with knife-edge follower (simple harmonic rise)](https://xemstudio.com/objects/plate-cam-knife-follower-mechanism/)
- [Plate cam with roller follower (cycloidal rise)](https://xemstudio.com/objects/plate-cam-roller-follower-mechanism/)
- [Plate cam with flat-faced follower (constant acceleration (parabolic) rise)](https://xemstudio.com/objects/plate-cam-flat-follower-mechanism/)
- [Plate cam with mushroom (curved-face) follower (cycloidal rise)](https://xemstudio.com/objects/plate-cam-mushroom-follower-mechanism/)