The simplicity of screw threads and the ubiquity of threaded fasteners belie the physics behind these mechanisms, but understanding the basics is a great place to start.

The Archimedes screw, an ancient Greek invention for lifting water. Learn about its origins, how it works, and its modern ...

Keen-eyed readers will recall [Andy]’s recent scratch-built ball screw build ... were a great lesson in how to machine a complex mechanism to work in a constrained space. Still, it left folks ...