5 Best MIG Welders - Dec. 2021 - BestReviews
2021-11-2u2002·u2002How MIG welders work. A MIG (metal inert gas) welder is a kind of arc welder, and all arc welders use the same basic principle: an electrical current is passed between two electrodes, causing a short circuit across the gap between them. This short circuit, or arc, can be anywhere from 5,000° F to 40,000° F, so it melts metal very effectively.
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