A manual chain hoist is a device that can lift heavy loads with little effort by applying the pulley principle.
A manual chain hoist is often installed in factory warehouses because it can lift even very heavy loads by using chains for lifting. Since they are lifted manually, the lifting height can be slightly adjusted, but the weight that can be lifted is lighter than that of electrically powered chain hoists.
Manual chain hoists are used in places where heavy objects need to be lifted. They are used in distribution centers where heavy loads are constantly being sent, and in applications such as loading trucks for shipment from factories and unloading for incoming shipments.
Manual chain hoists are powered manually, so they do not require a power source, are portable, and can be used at outdoor construction sites. It can also be used for removing roots after a tree has been cut down. A special tripod is set up around the roots and the manual chain hoist is attached to the top of the tripod. The chain is then attached to the stump and slowly pulled up, making it a very effective tool for removing difficult stumps and roots.
The block in the manual chain hoist represents a pulley, and the use of a pulley makes it possible to lift easily, even heavy loads that cannot be lifted by humans.
The principle of pulleys means that the more pulleys are used, the less force is required to lift the load. In other words, if two pulleys are used, the force required to lift a load is halved, and if three pulleys are used, the force required is reduced to one-third. On the other hand, the length of the chain that is pulled to lift the load is doubled and tripled, respectively.
However, with a pulley, even after lifting a load, the load still tries to fall down, so it must be continuously supported. For ease of use, it is important to hold the load in place without applying force once lifted. For this reason, manual chain hoists use a device that uses gears while applying the principle of a pulley, so that once lifted, the load is kept at that height without falling, enabling efficient work.
