A sheave (/?iːv/) or pulley wheel is a grooved wheel often used for holding a belt, wire rope, or rope and incorporated into a pulley. The sheave spins on an axle or bearing inside the frame of the pulley. This allows the wire or rope to move freely, minimizing friction and wear on the cable.Click to see full answer. Also know, what is the difference between a pulley and a sheave?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.Similarly, what is a pump sheave? Pulleys or “sheaves” are commonly used for connecting pumps to motors or engines via drive belts. Most pulleys are cast iron or aluminum construction and are offered in either fixed-bore or tapered bushing styles. Herein, what is a rope block? Ropeblock is a globally renowned manufacturer of lifting & rigging hardware. Besides Smart Engineered products and solutions, our reputation is due to thorough knowledge of the markets in which we operate.How much can a block and tackle lift?Even though a block and tackle decreases the amount of force necessary to move an object, it does not change the amount of work. For example, a block and tackle with a mechanical advantage of four will allow you to lift a 4 lb. object with only 1 lb.