Hello guys,
First i really don't know if this is the correct forum, but this one sounds more fitted to my question, compared to linear/rotary motion.

The problem is quite simple, i need a 30:1 somewhat gear for my small step motor, it has a 3mm shaft.

For now, i would like a cheap one for tests, and on the future a good anti-backslash version for my small cnc creation.
Do you know any store that sells cheap gears/gearboxes for small motors?

I searched on ebay:
http://cgi.ebay.co.uk/12V-DC-300-RPM...d=p3911.c0.m14

And found several of those, i would just have to remove the motor.
The seller doesn't know what is the motor shaft diameter or the gear ratio of it, and doesn't comply in opening one to confirm them.

Do you guys have any idea that could help?