Mouler

Mouler t1_ir30y4w wrote

Acetone would be the way to go, I believe. However, just wipe out the flutes with a dry cloth is plenty. You really want to keep that microscopic thin layer of oil on at all times. It won't protect any better than the TiN, but it will protect what is exposed where the coating may have chipped. This practice is far more valuable on uncoated steel tools.

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Mouler t1_ir2y0cu wrote

Lots of not quite conflicting suggestions here. Let me summarize. A light film of oil is a good thing. Running dry with TiN in mild steel is fine for small jobs with cheap drills. A light coat of oil that will polymerize when heated will make it cut a little better, generate a little less heat and the edge last longer.

2