[sanddrag]

I was actually able to redraw the one on firstcadlibrary with very little difficulty. So, I will be trying to make the 54 tooth one. Now, simple logic tells me that the actual height of each tooth should be the same between different sizes of the gears. The outside diameter of the 60 tooth gear is 43.4 mm. The root diameter of the 60 tooth gear is 40.25 mm. This is a difference of 3.15 mm. Is this difference number going to be exactly the same no matter what tooth count the gear is? PIC lists the difference between outside diameter and pitch diameter to be 1.4mm. So assuming all this is correct, the pitch diamter of a 54 tooth 0.7 module gear would be 54 x 0.7 = 37.8mm and the outside diameter would be 39.2mm. If we subtract the OD-root difference of 3.15 mm, the root diameter should be 36.05 mm. Is this correct?

Also, I assume the shape and dimensions of each tooth remain constant across the various tooth counts of a particular gear. Is this true?

Thanks.

EDIT: I called an EDM place and they said it would be something like $35-50 per piece and they could do it in a day. I forgot to ask if there is a setup charge. Would anyone here know? Because I don't want to call back because the guy was very hard to understand and he went on and on forever.