A lifting block is a simple lifting mechanism that uses a sprocket or drum to lift a load vertically. Its light weight, compact structure, and ease of use make it suitable for simple lifting tasks during construction. Lifting blocks can be categorized as single-, double-, or multi-blocks based on the number of pulleys. Based on the connection method between the block and the load, they can be divided into four types: hook block, chain link block, eye block, and sling block.
Lifting blocks are important lifting tools. They are simple and easy to use, capable of changing the direction of the pulley and tackle cable multiple times and lifting or moving moving objects. Blocks composed of a combination of pulleys are particularly widely used in construction and installation operations, in conjunction with winches, masts, or other lifting machinery. Product sizes range from 0.03 to 320 tons, with pulley systems ranging from single to pick-up pulleys. Lifting options include hook, chain link, eye block, and beam. They are easy to use and versatile, and can be operated manually or motorized.
A single lifting block can only change the direction of force and doesn't save effort. A two-block system, however, can achieve this goal by changing the direction of force. During lifting and transportation operations, a single block can serve as a guide pulley; a block system can be used in conjunction with a winch for lifting.
The lifting blocks utilize national standard ball and roller bearings, with two per pulley. Different specifications can be used depending on the lifting tonnage. These standard bearings are suitable for high speeds and are maintenance-free.
