With their various design possibilities from a simple belt with two pulleys to complex applications with many convolutions and spatial twist, belt drives are convenient solutions in many areas of modern mechanical engineering. Especially, where great distance needs to be covered, belt drives are often exclusive options. We only show the most important types in several films below. The size may vary from a microscopic (e.g. as used in printers) to a macroscopic (e.g. textile processing machines) level.