Out of the types of coolants I've used so far the Doall 944 worked pretty nice. It does have a different smell and it is very sticky when it evaporates on metal surfaces. But it stayed good for a very long time unlike other types we had used that any oil and dirt mixed right into. This stuff stayed its normal blue/green color for a long time. We used it in both manual and cnc's. Although there is most likely better kinds out there. I believe Milacron has some new special coolants, I'll double check on that at work on monday and let you know what it is. |