Description
A fixed pulley with no sheave changes the direction in which the force is applied to move the heavy load, but it does not change the amount of force needed. Using multiple sheaves gives you a mechanical advantage.
A sheave is a pulley with a grooved wheel for holding a belt, wire rope, or rope. The grooved wheel spins on an axle or bearing inside the frame of the block. … Sheaves can be used to redirect a cable or rope, lift loads, and transmit power. The words sheave and pulley are sometimes used interchangeably.
