I cannot seem to get this right.. I want to create 2 gears that

work together.I can create gears, but I cannot seem to figure out the math needed to make them

uniform, or where theywork together.

There is a mathematical way to do this.I do not know the formula..## What I’m trying to accomplish.

What I tried:

- Create a circle
`800px x 800px`

- Create a circle
`600px x 600px`

- Create a star with inner radius 200 (400 diameter), 500 (1000 diameter) outer, with 12 points.
- Compound the smaller circle and star. Intersect the remainder.
Do the same thing, except

half each value and the points.I would think this would make a 2:1 gear ratio where both gears match exactly, but they don’t…

**Answer**

The same way one would create a real working gear. Here are tools which will create gears:

- http://geargenerator.com — this tool will allow one to save an SVG which can be edited in any vector drawing program
- http://sourceforge.net/projects/gggears/?source=directory — opensource tool
- http://www.idleamusements.com/?page_id=367 — an on-line tool, it will create a .dxf which can then be opened in Illustrator
- http://www.cabinetpartspro.com/GearMaker/GearMaker_Setup.exe — Windows tool

See the site http://woodgears.ca/ for more information on gears — they have a Gear template generator as well: http://woodgears.ca/gear_cutting/template.html

Alternately, you can draw them by hand — you just need to use basic geometry to ensure that the diameter of each gear is an integral ratio.

**Attribution***Source : Link , Question Author : kcdwayne , Answer Author : WillAdams*