Cool, er i should say Hot!
Yah, as much as we'd be tempted to hose that bad boy down with flood coolant, that would just kill those inserts. At high temperatures, thermal shock by flood coolant actually causes inserts to fracture due to be exposed to high heat (in the cut) then immediate cooling from the cold coolant. Better off just letting the carbide insert heat up and stay hot and hope the heat comes off in the chips. A bit of air blast is all you want to help out with evacuation...
Remember to consider thermal shock as one more cause of poor insert life.
I would not want to change the inserts in that holder, there must be a hundred of em
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Scott_bob |