And then you see something like an infinitely variable transmission built from nested pulleys, and you realize there’s always room for improvement. The electric motors generally used in robotics ...

[Scott Swaaley] needed a bunch of timing pulleys for the clock he was building. He had already decided on the MXL profile, but he needed so many of these toothed pulleys in so many configurations ...

This video explores different methods that can be use to amplify a force, and focuses on three types of machine - levers, ...

Round belt pulleys are mechanical devices which transmit rotational motion around an axle. They are used to lift loads or to apply/transmit power. The round belt pulley accommodates a belt, cable, or ...

V-belt pulleys (also called vee belt sheaves) are devices which transmit power between axles by the use of a v-belt, a mechanical linkage with a trapezoidal cross-section. Together these devices offer ...

Various pulleys with different degrees of mechanical advantage (1:1, 1:2, and 1:4) can be used with different masses and a newton scale to perform a quantitative demonstration. Mount the rod ...

It’s easier when two people share the lifting of heavy objects and pulleys work in the same way. When you pull the rope, the pulley helps you lift heavy objects more easily because it spreads ...