Coolant Filtration: Why Micron Ratings Matter in Deep Hole Drilling
I use 20-micron filtration for gun drilling and 50-micron for BTA. I cut my tooling costs by 35% within six months of upgrading from 50-micron to 20-micron on my gun drilling line. That is not a theoretical number — I measured it against the previous year’s spending. Coolant filtration matters more in deep hole drilling than in any other machining process I know. The cutting zone is at the bottom of a deep, narrow hole. Chips have to travel the full length of the bore to escape. If unfiltered coolant recirculates chips back into the cut, they damage the cutting edge and score the bore surface. Here is what I have learned about choosing the right micron rating. ...