We often hear the question whether the hand chain hoist is single-chain or double-chain. So what's the difference between single-chain and double-chain?
Hand chain block is divided into single-chain and double-chain. Strictly speaking, it is not allowed to change double-chain into single-chain. This situation belongs to private refitting, and once an accident occurs, it will bear all the responsibility of its own. Normally, 2 tons, 3 tons, 5 tons of hand chain hoists are double chains. This chain refers to the lifting chain.
For example, 2 tons of hand chain hoist, 2 tons of manual chain hoist uses a single chain with a diameter of 6 mm. The weight of a single chain is 1 ton, and the weight of two chains is 2 tons. In this way, changing the double chain into a single chain means changing the load from 2 tons to 1 ton. From another point of view, the structure of hand-pulled hoist is that the upper hook and the lower hook are located on one line. Hand chain hoist lifting chain 2 lines to 1 line, the upper hook and the lower hook are not on the same line, in this case, lifting heavy objects will be very dangerous, easy to occur safety accidents.