A hoist is equipment used for lifting or lowering a load with the help of a drum or lift-wheel. The rope or chain is wrapped around the equipment. It can be operated electrically. Electric hoist is mounted on the overhead cranes, jib cranes, or gantry cranes. The lifting height is from 3 to 30 meters whereas; capacity is normally from 0.3 to 80 tons. This equipment consists of transmission and rolls or sprockets, and motor. 更多
