Pilot Hole
A punched hole at (near) the plate edge of which the plasma arc cut is started.
Related Links
How to Drill a Pilot Hole
Pilot hole
3 Ways to Make a Pilot Hole – wikiHow
I’ve Been Drilling Pilot Holes Wrong My Entire Life. Here’s How I Learned to Correct My Technique. | Man Made DIY | Crafts for Men
Solved! When, Why, and How to Use Pilot Holes Correctly
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How to drill pilot holes
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