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so for a while at work, we have ran the Tormach. so originally we had the same coolant as a Hurco CNC and the tormach is in a small room, which made the EDM guys displeased because it reaks. so we switched it out for the coolant that originally came with the Tormach and it didn't stink as bad. well finds out that coolant does stop rust that bad. so we took it out and were trying to clean it up.
No, that’s a mallet…
I worked at a shop for about 6 years where none of the operators were ever trained on how to properly mix coolant and management didn't care. Trust me, it can be a lot worse. I had to rip apart one vise where the internal hemisphere which mates with the set screw had been completely eaten away by rust.