12mm output motorgearbox

Other Hardware Motors, Mechanics, Power and CNC
1

Hi I am looking to build a 4WD robot with 4 independent motorgearboxes. I have some wheels that I would like to use that have a 12mm hex hub. I need a motogearbox with high torque, and a threaded bar or a tapped hole at the end of the output shaft. Has anyone seen/heard of a motogearbox with these specifications?

Any info greatly appreciated.

Update:
I might have found what I'm looking for - an adapter for a smaller output (6mm) gearbox shaft.
http://www.robotmarketplace.com/products/ML-hexhub.html

2

For heavy-duty stuff you could search the bay for pocket-bike/quad spareparts.
If you just need big wheels at a lightweight Robot, you could use fifth or eight scale Rc-car gearboxes/diffs and block one side of the Output shafts.

What gear-ratio would you need between Motor and wheel? Would it be possible to use chains? If so, there would be plenty of options on the pocket-bike market.