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A cable pulley is a wheel with an axle used to guide braided steel cables. They are commonly used in industrial settings and weight lifting machines. The size and number of pulleys determine the weight capacity of the system. Ski lifts use large pulleys, while exercise machines typically have one or two.
A cable pulley is a type of guide wheel around which a braided cable, usually made of steel, can be wound. The pulley will be fitted with an axle to allow the wheel to turn and the axle will usually be mounted on a frame which can be attached to a solid object for stability and strength. The pulley itself is usually made of a strong metal such as steel to prevent premature wear or other damage. The cable pulley wheel is usually grooved or scooped around its perimeter to provide better guidance for the cable.
The uses of a cable pulley vary, although the system is usually designed for lifting heavy weights or moving heavy objects over a length. Braided cords are much stronger than belts or ropes in most cases, so they’re better prepared to handle the weight of larger items. It is not uncommon to find a cable pulley in an industrial setting such as a warehouse or factory or any other environment that requires extremely heavy objects to move smoothly. The size of the cable and pulley will determine how much weight the system can handle, as well as the number of pulleys in the system.
A good example of a rope pulley system is a ski lift. This system uses two large pulleys, one at either end of the lift, and cable support towers between the two pulleys to maintain proper tension on the cable system. The pulleys in such a system are likely to be quite large, as the elevator is likely to support an extremely large amount of weight, especially when weighed down by passengers.
Smaller cable pulley systems are common on weight lifting machines. Cables are stronger and don’t stretch as much as ropes or belts, which is especially important when cables regularly support large amounts of weight. Exercise machines can be equipped with several pulleys to match the motion of the machine’s exercise, although most exercise machines only have one or two pulleys per cable. The more pulleys in the system, the more weight is distributed which is beneficial in most situations. On weight machines, however, the user will want to benefit as much as possible from heavier weights, so adding pulleys to the lifting system can actually be counterproductive for the weight lifter.
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