A hoist is a suspended machinery unit that is used for lifting or lowering a freely suspended (unguided) load
For this purpose, it is necessary to mount a hoist on a crossbeam. Such hoists are typically seen at warehouses and yards where heavy goods need to be lifted and moved from one place to another
Electric hoists use electric power to lift and lower objects
A variety of chain hoists are available these days. Since the days the first electric chain hoist was made, better and more reliable hoists have made their way on the market presently. These are extremely heavy-duty electrically powered devices that are specifically designed for lifting very heavy objects, typically above a ton. They will therefore be found on large scale project sites such as industrial sites or construction site. There are chiefly two types of electrical hoists – electric rope hoists and electric chain hoists
A chain hoist is a mechanical device used for lifting heavy loads of objects and equipment. It is made with a pulley, which is held together by a closed chain. The closed chain in the chain hoist forms a loop, which makes it easy to be pulled by hand. There are three types of chain hoists: air, manual, and electric. The manual chain hoist and the air chain hoist are designed with reduction gears, hook pivots, and swivels. Suspended by a top hook, or by a push or geared trolley, these types of chain hoists move objects slowly and carefully while making height adjustments. An air chain hoist is a pneumatically driven machinery unit that utilises a chain as its lifting medium, and is used for the lifting and lowering of a freely suspended (unguided) load. Air chain hoists are often used in environments that require electric spark avoidance due to a potentially explosive atmosphere. The attached load is well secured so it can be left fixed without requiring a great deal of supervision. The electric chain hoist, on the other hand, is generally used for lifting heavy-duty industrial loads. The electric chain hoist allows the user to pull from the side as well as vertically.
Rope hoists use the mechanism of pulleys and sheaves with strong wire rope or