This is a parametric involute gear demo for OpenJsCad. Many great new features have been added to OpenJsCad! One of them is the ability to define parameters that can be modified by the user in the browser window. So you can now create parametric models that can be customized by anyone in a web browser.To create your own gears go to: http://joostn.github.com/OpenJsCad/ To customize your gear, change the parameters and press the Update button. Then press Generate STL to get the .stl file. Creating your own customizable models is very easy. Just include something like this in your .jscad file: When you load the model in the OpenJsCad parser it will then show a field 'Number of teeth:' with a default value of 10. For more information about OpenJsCad and documentation: http://joostn.github.com/OpenJsCad/