Parametric Concentric Gear (Customizable)

Customized concentric Gear

Parameters for each individual gear:
* Teeth Count
* Teeth Spacing
* Teeth Depth
* Height

Additional features:
* Plastic saving ring is optional and has configurable depth
* Cutted Shaft for better grip
* Modular code, so you can extract the module and use in your project

Despite the parameters been metric you can resize in your slicer to use it as imperial

Technical Details:
* by Teeth Depth I mean: "Whole depth", including the clearance
* by Teeth Spacing I mean: Circular Pitch
* The addendum of the gear is 1/4 of the whole depth
* The 6 turn points are equidistant.
* At half of the depth, the thickness and the clearance are equal, as the clearance was half of the depth

These changes where made to make the gears more easily printable