It allows you to punch perfectly clean 19 holes.
Best way to punch holes in sheet metal.
Your metal piece to be punched.
If you do not have a sawzall or other saw that will safely cut metal use a pair of heavy duty tin snips.
Measure and mark your metal.
Make the incision large enough to admit the sawzall blade.
How to punch a hole in metal.
Metal centerpunch scribe sturdy carpentry nail or other sharp pointed object that can make a small dent in your metal sheet.
Hole punch sheet metal.
The wooden bread layers of the sandwich keep the sheet metal flat and prevent the drill bit from wandering as it bores through the sheet metal.
Punch a hole through the metal using a cold chisel and mallet or drill through with a heavy duty drill with a bit that is rated for metal.
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For larger holes or use on thicker gauges of steel more.
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This punch is the best all around sheet metal punch we offer but it does still require some labor effort to punch holes.
We ll start by marking precisely where the punch hole will be in the metal.
For clean precise holes in thin sheet metal make a wood sandwich.
Bostitch office hp12 3 hole punch 12 sheet capacity metal silver.
4 7 out of 5 stars 10 511.
Simply sandwich the sheet metal between two pieces of wood and clamp everything down on a table or workbench.