Winch, also known as winch, is exquisite and durable. Mainly used for material lifting or traction in buildings, water conservancy projects, forestry, mines, docks, etc. Winches have the characteristics of high universality, compact structure, small size, light weight, large lifting capacity, and convenient use and transfer. Widely used for material lifting or leveling in fields such as construction, water conservancy, forestry, mining, and docks. It can also be used as a supporting equipment for modern electronic control automation production lines. There are 0.5 to 350 tons, divided into two types: fast and slow. Among them, winches weighing over 20 tons are large tonnage winches that can be used alone or as a component of lifting, road construction, mining and other machinery. It has the advantages of simple operation, large amount of rope winding, and convenient relocation, and has been widely used. The main technical indicators of the winch include rated load, supporting load, rope speed, rope capacity, etc.