thanks for anwering question
Wait is this what you were talking about?
Sorry Shirley, but pulleys have not been replaced by anything. It is the discretion of the user what type of hoist is going to be used. A chain hoist typically uses a toothed gear set is some kind of shackle assembly that has a shaft attached to the gear drum. As the gear assembly turns, it makes the shaft turn which is attached to some kind of load. About the only advantage to a chain hoist is the load that it can handle as opposed to a rope type pulley system. The opposite side of this is a wire rope and a pulley system that could handle the same load, just as well as a chain hoist. It really matters what a person chooses to use, and what cost they are willing to accept.
