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Changed my mind about coolant mist after a bad crash
I used to run my machine dry all the time, figured coolant was just a mess to clean up. Then last month I had a 1/4 end mill snap on a stainless job, ruined the part and cost me about $80 in material and tooling. A guy at the shop who's been doing this 20 years showed me his before and after on the same setup with flood coolant, the finish was night and day. Anyone else swear by a certain coolant mix for stainless?
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johnson.ryan14d ago
Use koolmist 77 for stainless, that stuff works great.
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funny you mention koolmist because i actually tried that stuff once and it made my whole shop smell like a chemistry lab for a week lol. i ended up switching to a semi-synthetic mix that was like $30 a gallon but you dilute it 20:1 so it lasts forever. the thing that really sold me though was a tip from an old timer online years ago where he said to run a little more coolant than you think you need on stainless because the heat builds up fast in the cut zone. i used to get that blue discoloration on my chips and now they come out silver every time. still hate cleaning the machine every friday but whatever its worth it to not blow up tools.
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