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Looking for heavy duty knockout punch (lemmings.world)
submitted 1 year ago by to c/tools@lemmy.world
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I'm looking for a heavy duty knockout punch. Something that can punch a hole in 1/4 inch 316 stainless steel. Does anyone know where I can start looking for one?

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[–] 3 points 1 year ago (2 children)

Hole saws on stainless are tricky but it can be done. Lower speed and moderately high force are the ticket. Spin the drill full speed and you will work harden the stainless. Only plasma can save you then.

And spend the money on cobalt bits!

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  • [–] 1 point 1 year ago (1 child)

    Yeah one mistake people make with stainless is trying to just take light cuts because "stainless is tough", but all that does is work harden as you try to go in. You really have to push through the cut to ensure you're always reaching fresh steel.

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