Quote:
Originally Posted by RMS11
So I should be more worried about gears slipping or shearing because of the thickness? 
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err, shearing, bending out to the side, and then grinding lots. Slipping is the least of your worries.
Each gear will take the full force because gears in gearboxes mesh in a series, not parallel.
I would definitely make them thicker. They are waay too thin.
What pitch are those by the way? I suggest not using anything too small. 20 dp is a good size, its what AM uses. If you need any help, my AIM's in my profile.
good luck, Vivek
EDIT: cory's absolutely right. you still don't want anything too thin. better too strong than too weak.