Vol. 03: Square Deal
How to make square holes in aluminum sheet metal.
By Nick Carter
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Why would you want to make a square or rectangular hole in aluminum sheet metal? The short answer is that engineers are perverse, but there are other reasons: to make something that slides in or mounts on a hole without rotating, to make a picture frame, or perhaps you just happen to have a round peg that seems lonely. Here are 14 methods of making square holes for a variety of situations.
by Nick Carter; July 21, 2005 | Technorati | del.icio.us
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