Pulley sheaves are crucial components of hoisting, lifting, and mechanical systems. They consist of a grooved wheel designed to guide ropes, cables, or belts, reducing friction and allowing smooth motion. Commonly used in cranes, elevators, conveyor systems, and industrial machinery, pulley sheaves improve efficiency and durability in mechanical operations. They are made from high-quality materials like cast iron, steel, or aluminum to withstand heavy loads and harsh conditions.