An old timer at work told me to use Crisco when tapping, he hasnt broken a tap in 20 years. I Have tried it myself and thought it was interesting and wanted to share
this post was submitted on 10 Oct 2023
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Agreed, I've tapped some nasty materials - 1 tap per hole nasty - and the fluid change gave me the more than 8 holes for the same new tap.
That really opened my eyes to engineered fluids.