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barrel-getya t1_ir3knm8 wrote

I worked in a machine shop for more than 30 years, and we bought and used WD40 for drilling and milling cutting oil. It lubricates and dries fast so there is less mess. It smokes a lot though. For tapping holes we used Tap Magic.

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series-hybrid t1_ir65ydg wrote

I dont know whats in tap magic, but I worked for a while in a shop that always had a can next to the drill press.

The holes got drilled faster, and the drill bits lasted longer. Don't ask me how.

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