Hand-Operated Chain Hoist

Chain hoists are suitable for many jobs where a block and tackle (fitted with fiber rope) might be used. Chain hoists are stronger, more dependable, and more durable than fiber rope tackle. There are three general types of chain hoists: spur-geared, differential, and screw-geared (or worm-drive). The spur-geared chain hoist is the most efficient, because it will pick up a load with the least effort on the part of a worker. The differential-type chain hoist is the least efficient.

Screw-geared, and differential, hoists are self locking, and will automatically hold a load in position. Since the spur-geared hoist is free running, an automatic load brake, similar to that on a crane, is provided to hold the load.

The chains must be made of high quality, welded steel, with a load safety factor of at least five. Chain hoists should have a larger capacity than regular work requires. Supports for hoists must be strong enough to carry loads imposed on them. People handling a chain hoist must follow safe lifting procedures, in order to avoid strains and other injuries.