How To Draw A Helicoidal Screw on 2D CAD Like AutoCAD

Some times we need make croquis or sketches for show our ideas to a client, or some times company's request us datasheets of equipments before buy our project.
This make Solidworks and another 3D tools a very slow type of CAD tool for this task, nonetheless de 2D tools are a good option to make this quickly. In this tutorial I will show how to make in a little steps an Helicoidal Screw to Conveyors.
Im my profile I you publish the .dwg and a pdf for more detail.