Variable speed belt drive sheaves are common on combines. At their simplest, a pair of sheaves at one end of a belt moves closer together or farther apart. Another pair of sheaves at the other end of ...

Variable-stroke drives are most widely used in low-speed applications below 1.5 hp. They compete mainly with belt and chain drives and have running efficiencies near 80%. However, unlike belts, ...

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 ...