A system where the final drive from gearbox to wheels is by leather or rubber belts that are contained on pulleys. Today many of the engine-driven auxiliaries use belt drives.
A turntable system that uses a pulley belt to transfer rotational drive from the motor to the disc platter.
a pair of pulleys attached to usually parallel shafts and connected by an encircling flexible belt (band) that can serve to transmit and modify rotary motion from one shaft to the other. Most belt drives consist of flat leather, rubber, or fabric belts running on cylindrical pulleys or of belts with a V-shaped cross section running on grooved pulleys.
a mechanism that uses belts and pulleys to transfer rotary
a method of transferring rotary motion between two parallel shafts
Belt driven units use pulleys and belts to slow the speed of the pump. Where the engine spins at 3,800 RPM the pump will be slowed to 1,400 to 1,900 RPM depending on the pulley and belt set up. This system ensures long pump life because the bearings do not get as much wear and the ump is isolated from the heat of engine, being separated by the belts and pulleys. The disadvantage of this system is there is some loss of efficiency due to the additional friction from the belts and pulleys. Plus there is more maintenance required adjusting the belts. However, all other things being equal the belt drive unit should provide for the longest pump life.
The platter of the turntable is driven by a separate motor which is connected by a rubber belt. This is most common in domestic turntables and budget DJ turntables.
From time to time the use of toothed belts is proposed as an alternative to chain drive. The major advantage touted for this system is that it is cleaner than a chain. There are serious disadvatages to this approach, however: Belts can't be opened and re-closed as chains can, so it is not possible to fit one to a standard diamond frame, unless you cut the frame open, because the belt has to be looped through the triangle formed by the right chainstay, right seatstay and seat tube. Belts can't be lengthened/shortened as chains can, making it difficult to customize the gearing by going to a different sprocket/chainring size. As with shaft drive systems, all of the benefits touted for this system are also attainable with an enclosed chain drive.