How to drill holes in 38 thick steel plates?

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Ninja trick for chain drilling: Lay out an odd number, drill the odds first then the evens That way the material on either side of the hole

Golden drill bit is a cutting tool used to create holes in wood Drill bit for metal and wood vector cartoon illustration isolated on a white background  But solid carbide or tungsten carbide drill bits are needed to cut through hard, dense metals Also, check the drill bit's coating A TiN coating will slow down

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