# Flat belt 12 × 1.5 for the right-angle guide-pulley drive (loop drawn on the pulleys)

> How is a belt led round a right angle by guide pulleys?

- 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/flat-belt-12x1-5-right-angle-guide-drive/ · JSON: https://xemstudio.com/api/geometry?object=flat-belt-12x1-5-right-angle-guide-drive · Plain text: https://xemstudio.com/objects/flat-belt-12x1-5-right-angle-guide-drive/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 |
|---|---|---|
| 50.61 | 217.14 | 50.61 |

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

## Notes

- 12 × 1.5 mm flat belt, inside length 774.52 mm, joining two Ø40 pulleys on shafts at right angles (80 mm apart along the common perpendicular) through two Ø28.28 guide pulleys 100 mm beyond; each of its four strands turns 45° about its own length.
- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

## Sizes

| dimension | value |
|---|---|
| width × thickness | 12 × 1.5 mm |
| inside length | 774.52 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. 3: figure, his text and an animation](https://507movements.com/mm_003.html) — web — Publisher's page; dimensions are facts
- Xem Studio: [drawing](https://xemstudio.com/objects/guide-pulley-right-angle-belt-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/flat-belt-12x1-5-right-angle-guide-drive/index.json · license: https://xemstudio.com/files/hardware/flat-belt-12x1-5-right-angle-guide-drive/LICENSE.md

- flat-belt-12x1-5-right-angle-guide-drive: [STEP](https://xemstudio.com/files/hardware/flat-belt-12x1-5-right-angle-guide-drive/flat-belt-12x1-5-right-angle-guide-drive.step) · [STL](https://xemstudio.com/files/hardware/flat-belt-12x1-5-right-angle-guide-drive/flat-belt-12x1-5-right-angle-guide-drive.stl) — belt loop

## Questions

**How is a belt led round a right angle by guide pulleys?**

12 × 1.5 mm flat belt, inside length 774.52 mm, joining two Ø40 pulleys on shafts at right angles (80 mm apart along the common perpendicular) through two Ø28.28 guide pulleys 100 mm beyond; each of its four strands turns 45° about its own length.

## Fits with

- [Belt drive between shafts at right angles with two guide pulleys](https://xemstudio.com/objects/guide-pulley-right-angle-belt-mechanism/)