The automatic transmission has been a given option through most our time behind the wheel, but that wasn’t always the case. In the early ’30s there was no such animal. The main purpose behind any ...

A gear close gearA gear is a mechanical part with teeth that interlock with another gear or belt to transfer motion and power while changing speed, or direction in a mechanical system. is a special ...

One of the killer apps of 3D printers is the ability to make custom gears, transmissions, and mechanisms. But there’s a learning curve. If you haven’t 3D printed your own gearbox or automaton, here’s ...