# Waved wheel on an upright shaft lifting and lowering a bar

> How does a waved wheel make a bar rise and fall?

- Category: Mechanisms › Cams
- Kind: Hardware
- Basis: Xem Studio design following Brown No. 165 (1868)
- Page: https://xemstudio.com/objects/waved-wheel-reciprocating-bar-mechanism/ · JSON: https://xemstudio.com/api/geometry?object=waved-wheel-reciprocating-bar-mechanism · Plain text: https://xemstudio.com/objects/waved-wheel-reciprocating-bar-mechanism/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/)

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

## Notes

- The upper face of a wheel on an upright shaft rises and falls in waves round its circumference. A bar standing on it through a roller is lifted by each crest and lowered by each hollow as the wheel turns: two waves give two strokes per turn, with the motion of the wave's shape (here a sine).
- Ø60 wheel, face z = 14 + 4 sin 2θ (8 mm stroke, two per turn); a 623 bearing on a radial pin under an 8 × 8 bar rests on it, drawn on a crest. The bar's guide is not drawn.
- Brown's No. 165 (waved wheel on an upright shaft giving a rising and falling motion to a bar).
- Parts (each has its own page): waved-face-wheel-60-2-waves-a4-bore8, waved-wheel-follower-bar-8x8-roller-pin, ball-bearings-metric, dowel-pins-metric, linear-shafts-h6.
- Brown's movement No. 165 (1868) shows it; this model is a Xem Studio design following his figure, every part at true size.

## Sizes

| parameter | value |
|---|---|
| wheel | Ø60, 2 waves |
| stroke | 8 mm |
| strokes per turn | 2 |
| roller | 623 bearing, radial 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. 165: figure, his text and an animation](https://507movements.com/mm_165.html) — web — Publisher's page; dimensions are facts

## Free STEP/STL (1 parts, Xem Studio Design License, Xem Studio)

Index: https://xemstudio.com/files/hardware/waved-wheel-reciprocating-bar-mechanism/index.json · license: https://xemstudio.com/files/hardware/waved-wheel-reciprocating-bar-mechanism/LICENSE.md

- waved-wheel-reciprocating-bar-mechanism-assembly: [STEP](https://xemstudio.com/files/hardware/waved-wheel-reciprocating-bar-mechanism/waved-wheel-reciprocating-bar-mechanism-assembly.step) · [STL](https://xemstudio.com/files/hardware/waved-wheel-reciprocating-bar-mechanism/waved-wheel-reciprocating-bar-mechanism-assembly.stl) — Assembled mechanism, all parts placed at one pose (STEP keeps each part separate)

## Questions

**How does a waved wheel make a bar rise and fall?**

The upper face of a wheel on an upright shaft rises and falls in waves round its circumference. A bar standing on it through a roller is lifted by each crest and lowered by each hollow as the wheel turns: two waves give two strokes per turn, with the motion of the wave's shape (here a sine).

## Fits with

- [Waved-face wheel Ø60, top face z = 14 + 4 sin 2θ, Ø8 bore](https://xemstudio.com/objects/waved-face-wheel-60-2-waves-a4-bore8/)
- [Follower bar 8 × 8 × 60 with a Ø3 cross hole for a roller pin](https://xemstudio.com/objects/waved-wheel-follower-bar-8x8-roller-pin/)
- [Ball bearings, 683 to 6210 and flanged F6xx (ISO 15)](https://xemstudio.com/objects/ball-bearings-metric/)
- [Dowel pins, 2–6 mm (ISO 2338 / DIN 6325)](https://xemstudio.com/objects/dowel-pins-metric/)
- [Linear shafts Ø3 to Ø25 mm (h6), 100 to 1000 mm long](https://xemstudio.com/objects/linear-shafts-h6/)