Customizable involute gear and rack

thingiverse

See the original for full description. This version includes several minor fixes and updates to Openscad 2015. Modifications: - For the benefit of the customizer, I've set the tooth size to 2*pi mm. This makes the pitch radius equal to the number of gears. If you want different gear tooth sizes, you can either download and edit the Openscad file or scale the gear in your printer software. - Added some different hole types, including D and hex for coupling to D-shafts and Hex bolts. - Adopted a bug fix. - Users can now enter the helix angle rather than the degrees of twist. - Fixed a bug where helical gears would create defective objects.