A driving belt or, more commonly, drive belt is any bel […]
A driving belt or, more commonly, drive belt is any belt that transfers axial motion from a motor to another device. In automotive applications, a driving belt can take the form of either a V-belt or a serpentine belt and allows the motor to drive accessories such as an alternator, power-steering pump or air-conditioning compressor. Both V- and serpentine driving belts are made of rubber and can be reinforced with a variety of materials, such as steel, polyester and other fibers.
Poly-V belts, also called serpentine belts, are flat on the outside and have multiple Vee-shaped grooves on the inside. This type of drive belt provides the high-traction power of a traditional V-belt in only one belt.
V-belts, or Vee belts, are typically used for light-duty power equipment and appliances. V-belts fit in a deep, Vee-shaped groove inside of the pulley wheels, and provide high-traction power.
Round belts are are generally made of rubber. This type of belt is generally used for light loads, such as in a sewing machine or a vacuum cleaner.
V-link belts are similar to traditional V-belts, but are open-ended and don't require the use of metal fasteners. V-link belts are typically used when obstructions make it difficult to reach the drive belt. This type of drive belt tends to be expensive and has a limited load capacity.
Flat belts are also used to transmit power from one shaft to another. They are generally classified as either small woven endless belts or higher power flat belts. The woven endless belts are especially useful where minimum vibration is required at the driven pulley due to semi-elastic material used in construction. The higher power flat belts are often useful because they eliminate the need to high belt tension used to grip pulleys, which in turn reduces the load on the shaft bearings. The material used for high power flat belts is sticky yet abrasion-resistant rubber compounds.
Timing belts, sometimes called synchronous belts, are generally used in low-power applications. Timing belts have teeth on the inside and do not depend on friction. Timing belts have a more limited power capacity than other types of Rubber V Belt.