Pulleys

The drive belt idler pulley works in conjunction with the tensioner pulley/tensioner assembly to maintain tension on the belt as well as guide the belt. Idler pulleys are also used to achieve ideal belt routing around the engine drive accessories such as the power steering pump, water pump, A/C compressor, and alternator.

The simplest effective rope pulley block system, or block and tackle, always involves at least two pulley blocks, which yields a force advantage of two. In order to lift a 100-pound (45.36-kilogram) weight from the floor of a building in this manner, a single pulley is attached to the weight and another to the ceiling above the weight.

This drive belt design offers low noise output at very high speeds, giving smooth running and large transmission ratios, combining the high flexibility and light weight of flat belts, with the grip and performance of V-belts.

A drive belt tensioner is a pulley mounted on a spring mechanism or adjustable pivot point that is used to keep tension on the engine belts. ... When the tensionerhas an issue, it can affect the how the belts drive the pulleys which can affect the performance and functionality of the vehicle.

A pulley is a wheel driven by a motor. A belt is looped around this wheel and around a second wheel. When the motor is turned on, the powered wheel turns the belt which turns the second wheel. This arrangement can be used to either increase power, increase speed and to change direction of motion.

A gear has a diameter and teeth that mesh directly with another gear. A pulley has a diameter and transmits motion via a belt or rope to another pulley. In both cases, the ratios of diameter determine the speed/ torque of the final gear or pulley.