Summary

Customize to generate a model of a cogwheel.
More flexible than http://www.thingiverse.com/thing:525490/.

Instructions

update the module calling functions at the bottom lines as necessary:
cogwheel(numTeeth=30, r=14.53/2, r2=16.61/2, topLandWidth=0.2, spaceWidth=0.2, depth=1.45, cutout_radius=1.85/2);
numTeeth is the number of teeth.
r is the inner radius (at bottom land)
r2 is the outer radius (at top land)
top land width is the width of the tip of the teeth.
space width is the width of the bottom teeth.
depth is the thickness of the cogwheel.
cutout radius is the radius of the hole in the middle.
update the parameters as necessary.

Customizable Cogwheel