[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 (hex ...

Whether your goal is looks, efficiency, or merely getting your engine running, pulleys are critical parts, and there are important factors that need to be considered when selecting them. If you're ...

One common misconception is that belts will slip more frequently on composite pulleys than on metal pulleys. Not so! The wedging action of V-belts is so efficient that slip should never be an issue; ...

As the evolution of the automobile continues, many hot rodders fear they will soon be locked out of the engine bay of Detroit's latest iron. While it's true that OBD-II electronics seem to have ...

Discover how pulleys make lifting easier by spreading out force and changing direction. This science extra explores simple machines in action breaking down how pulleys work and where we use them every ...

Introduction Before the industrial age people largely had to rely on muscle power to move and lift heavy objects. Simple machines such as pulleys, levers and ramps made it easier for humans to lift ...

Pro road racers who use Berner's uniquely oversized rear derailleur cages have sworn time and again that they reduce drivetrain friction thanks to their humongous 15-tooth pulleys. Now, Jason Smith of ...

Have you ever seen a flag being raised, or wondered how a mechanical clock works? Let’s take a look at some of the simple mechanisms that they use. Pulleys and gears. When a flag is raised, it will ...