Quoting Removed, click Modern View to seeI believe you would be right if what you were lifting was magnetic, but if lifting plain chunks of steel they won't care about the polarity, and will be attracted by both cycles. DC will be more efficient and lift heavier loads because it does not have the part of the AC cycle that is null. Besides the theory part, I have played around with electro magnets, both commercial ones and ones I wound myself. They worked on AC. That was many years ago, and at that time I did not have a DC supplye to power them. I was fairly young and never thought of connecting to a tractor battery.
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Today's Featured Article - Talk of the Town: Removin Broken Bolts - by Staff. Another great discussion from the Tool Talk Discussion Forum. The discussion started out with the following post: " How would I remove a bolt thats broken off in a piece of metal and I want to save the treads in the metal and then put in a new bolt. "
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