Method for drawing all gears, usable with much software.

I propose a creation method for gears, usable with much software.
I used the 123D Design software in its free version, for it to be used by all.
Explanations in this short video (sorry, text in French).

https://youtu.be/_HmsXM6aRiw

In software with the possibility to twist, you can use it to create toothed gears in "v" by symmetry duplicating, after to have inclined its teeth.

More information (always in French) here: http://www.genapart.com/2016/01/05/dessinez-vos-engrenages/