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Introduction to Aluminum Hand Chain Hoists

Aluminum chain hoists help to lift heavy loads. It has two lengths of chain, one is pulled by hand and the other lifts the load. The force extorted by pulling the chain down by thirty links is multiplied into lifting the load with thirty times more force. Essentially, the aluminum hand chain hoist concentrates the force by transforming a small effort, exerted over a long distance, into a huge force, exerted over a short distance.

The hand chain host has many different components: the cock, drive shaft, gears, load chain sprocket, and hand and load chain. The entire hoist unit gets hooked above the weight that is to be lifted. The load chain is lifted to the weight, and the operator begins to pull the hand chain.  When the hand chain is pulled it turns the cock, the cog then turns the drive shaft, gears, and load chain sprocket. This means that the weight is lifted with thirty times more force than the initial force used to pull the hand chain.

The hand chain links fits into seven specially designed slots in the cog. When the hand chain is pulled, it turns the cog. The cog screws tight to a friction plate, which is attached to a ratchet wheel.  As the cog plate and wheel turn together, a catch clicks onto the teeth of the ratchet wheel, which prevents the cog from slipping backwards, under the weight of the load. With each transfer of force from gear to gear, the force from the hand chain becomes more heavily concentrated. The cog is also attached to the drive shaft, and as the cog turns it also turns the shaft. At the other end of the shaft, there is a small gear with five teeth. As this small gear turns with the shaft, the force applied to the cog by the hand chain increases.  The gear is multiplied by a ratio of seven to five, which means that one force on seven chain links is transferred to five teeth on the gear. The small gear turns at an incredible force, which puts a tremendous amount of stress on the teeth of the gear.  To decrease the amount of stress, there are two identical gears that bear the weight, at the same time.  This means that the stress is distributed across two gears, instead of one.  The small gear turns the two, eighteen teeth gear wheels, which have a small four-toothed axel on the other side. 

All of these hoist parts combine to form the aluminum hand chain hoist, which makes industrial lifting a much simpler task. If you are interested in learning more about hoists parts, contact a local professional in the area!