A chain block, also known as a manual chain hoist or a hand chain hoist, is a device that is used to lift heavy loads. It consists of a chain that is wrapped around a drum or a wheel and a hand-operated chain hoist mechanism that is used to raise and lower the load.
The chain block works by pulling the chain through the hoist mechanism, which causes the load to lift off the ground. The chain is pulled through the mechanism by pulling on a hand chain that is attached to the hoist. The hoist mechanism typically has a ratcheting system that allows the load to be lifted incrementally, making it easier to control the lift and position the load precisely.
Chain blocks come in a variety of sizes and load capacities, ranging from small units that can lift a few hundred pounds to large units that can lift several tons. They are commonly used in construction, manufacturing, and other industrial applications where heavy loads need to be lifted and moved.
One advantage of chain blocks is that they are relatively simple to operate and require minimal maintenance. They also offer a high degree of control over the lifting process, making them ideal for precise positioning of heavy loads. However, they do require a certain amount of physical effort to operate, so they may not be suitable for all users or all lifting applications.