I know this is the FreeCAD mailing list, but if it's hard with FreeCAD you can always try OpenSCAD. It's MCAD library (that's included) contains nice (parametric) gears 

Best regards, 
Peter Uithoven

On Fri, Jul 27, 2012 at 8:25 PM, major_ghz <major_ghz@electronique-libre.org> wrote:

i need to draw some tooth wheels,
but i don't know how to.

may be with python script, but how ?


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