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tonystark29@lemmy.world

Looking for heavy duty knockout punch (self.tools)

submitted 3 days ago by moody 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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[–] lemming741@lemmy.world 3 points 2 days ago (1 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!

[–] Nednarb44@lemmy.world 1 points 2 days ago (1 children)

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.

[–] lemming741@lemmy.world 1 points 2 days ago* (last edited 2 days ago)

If you're making dust instead of chips, slow the speed and get some more feed pressure