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The pulley is a simple machine that has many complex uses. The basic purpose is to making moving or lifting things easier. The advantage is that in exchange for very little effort, difficult tasks can be completed.

There are different types of pulleys and each has its own style of application. A pulley supplier can use knowledge of the uses of types of pulleys to his business advantage. Sharing how a product can make someone's life easier is a positive selling point. The pulley types are:

1. Fixed pulleys: A fixed pulley has an axle mounted in bearings attached to a supporting structure. A fixed pulley changes the direction of the force on a rope or belt that moves along its circumference. Mechanical advantage is gained by combining a fixed pulley with a movable pulley or another fixed pulley of a different diameter.

2. Movable pulleys: A movable pulley has an axle in a movable block. A single movable pulley is supported by two parts of the same rope and has a mechanical advantage of two.

3. Combined pulleys: A combination of fixed and a movable pulleys forms a block and tackle. A block and tackle can have several pulleys mounted on the fixed and moving axles, further increasing the mechanical advantage.

Applications of the pulley are all around us. From flag poles to the working parts under the cars we drive and the speeds on a bike, pulleys help make our lives easier. Their biggest asset for the common user is to create motion transfer with the least amount of effort.