The Ultimate Guide to Pulley

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What is Pulley ?

Pulley is a simple machine comprises of wheel and fixed axle, which used to support lifting heavy objects and move them. It multiplies the force that requires applying to lift heavy object and make the task easier.

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Mechanism of Pulley• One of the simplest types of pulley that can be explained is the pulley that has only

one wheel. The end of the rope that has a weight attached to it is lifted up only when an equal amount of force is applied from the other end, either manually or mechanically.

• If a weight of 100 Kg is attached to one end of the rope, then a force that is equal to 100 Kg needs to be applied on the other.

• But, this set-up is not helping as the force applied is the same amount as the weight that needs to be lifted. This is why more wheels are added to the set-up to ensure that the force applied is less than the weight that needs to be lifted. In the set-up described above, if one more pulley is added to the set-up, then the force required to lift off the 100 Kg weight reduces by half and only 50 Kg of force is required.

• So, keep on adding more wheels to the pulley set-up and you are lowering down the force that needs to be applied to lift off the weight. This is how a conventional and simple machine like a pulley is making life easier for us.

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Mechanism of Pulley

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Different Types of PulleyWhenever the thought of pulleys come across our minds, the conventional picture that flashes is an assortment of some pulleys and ropes that pull up any large and heavy object. There is a common notion that pulleys are usually of one type with varying sizes. But this is not the case. There are various sizes and types of pulleys, but they are broadly classified into three main categories.

1. Fixed pulley

2. Movable pulley

3. Combined pulley

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Fixed Pulley This is the simplest type of pulley system. In this, the wheel is fixed at a particular point like a pivot and works by changing the direction of the force applied. It is advantageous because you don’t have to push an object or pull it directly to move it. But it requires a large effort to move the object and this is its turn off when compared with other pulley systems.

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Movable Pulley

In this type of pulley, the wheel moves with the object it is displacing. This arrangement allows the pulley to lift the load with much lesser force. Only that much force is applied to the load as much as the force levied on the rope. It usually multiplies the force actually applied to it by the user. Thus, with the application of a small force the load can be displaced thereby making the task easier.

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Combined Pulley

These kinds of pulleys are a combination of both fixed and moveable pulleys. As such, they have the advantage of both of them. The user requires minimal application of force to lift an object without pushing or pulling it.

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Applications of Pulley • Here are innumerable uses of pulleys. Some of the most common ones

are:• A pulley system is used in an elevator to pull the weight of 5 people

against gravity.• A gym is one place where one can find a lot of machines using the

pulley system.• Flagpoles on a sailboat or a ship used a pulley system to hoist a flag or

bring it down.• Pulley systems are used in industrial machines across different

applications from production floor to delivery room.• There’s a catch to this brilliant machine. You use less force with a pulley,

but you must pull more because energy is wasted due to friction; when the rope rubs against the pulley wheels. Nonetheless, it feels simpler and effortless to use a pulley, now that’s an important thought, isn’t it?

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Contact us

Pulley Manufacturer

14, Panchal Sahakari, Udyog Nagar,

Nr. Vadilal Ice Cream Factory,

Tavdipura, Dudheshwar Road,

Ahmedabad - 380004,

Gujarat (INDIA)

+91-79-25621280

+91-9825096006

+91-9825303122

sales@pulleyindia.com

Call us 91-79-25621280

Call us 91-79-25621280

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Thank you

Call us 91-79-25621280