pic: Demo Transmission 222

[mechanicalbrain]

Originally Posted by Cory

gears don't have any 90* angles except for the face of the edge of a tooth.

It's not going to run under load at any rate, so they don't need to be perfectly precise.

but if its not a good fit you get serious probles. for example a section of the gear isnt close and it pushes on other gears. it could case a jam, wear, or chipping. with most drivetrains you want close to perfection. look all i know is that you dont use a waterjet to cut gears and this doesnt just come from me.