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Crane pulley block is a transmission device composed of multiple pulleys. It is mainly used to change the force direction of the wire rope, increase the mechanical advantage (saving effort or speeding up), and share the load. It is a key component of the crane hoisting mechanism.

The reasonable design of the pulley block directly affects the load-bearing capacity, efficiency and safety of the crane. When selecting, it is necessary to comprehensively consider the ratio, wire rope matching and working conditions, and perform regular maintenance to extend the service life.