Variable-pitch drives are the simplest of all mechanical adjustable-speed mechanisms. Most of these drives use rubber belts. However, chain types are unmatched in regard to its particular strong ...

In 1959, when Motion System Design made its debut, mechanical systems were the only way to control system speed. Now we ask of one inaugural-issue headline: In 1959, when Motion System Design made its ...

Pulley systems are simple machines that make lifting heavy objects easier. They consist of a rope or cable that passes over one or more wheels (pulleys). A single pulley changes the direction of force ...