to 1 in.), 350 to 1,000 rpm is recommended. For clean, precise holes in thin sheet metal, make a wood sandwich. Simply ...

[bitluni] took matters into his own hands and built this nifty DIY hole punch for light-gauge sheet metal. A little backstory will probably help understand why [bitluni] needs so many holes.

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Aluminium drinks cans make a great source of thin sheet metal which can be used for all manner of interesting projects, but it’s safe to say that retrieving a sheet of metal from a can is a ...