Why are metal chains sometimes paired with a smaller metal chain?
For instance when a large chain is used to lift a heavy object you’ll sometimes see a smaller chain running through or around the bigger chain. Is this in case the main chain breaks or does it help distribute the load across the chain? What exactly is going on there?
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I’m not at all certain what else you’re referring to here, but you may be talking about something like a chain fall. That has a heavy-duty “load chain” which is rated to handle the full load that the hoist can safely manage, and it also has an endlessly looped “operating chain” which the operator continues to pull in one direction or the other to gradually raise or lower the load.
The operating chain frequently loops around the load chain from time to time as it is spun by the operator (or twists in repose), but it is in no way holding any part of the load.
That must be it, thanks :)
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May 24th, 2016
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