I'd try air jet FIRST because the prime interest is to keep the blade COOL. Besides, some folks have found that when you hit a cutter with water/coolant, you can thermally shock the cutter and essentially ruin it. The air jet/vacuum trick is going to cut down on the gritty mess that inevitably results from cutting G10.
High speed steel cutters use misting for cutter lubrication. The critical thing that is being overlooked is that there is lots of air being blown at the cut point at the same time as the "misted" lubricant.
Yes, the lube helps but the air jet is doing the primary clearing of debris and cooling of the tool.
A 1/16" air jet should be plenty. Yes, you'll use a bunch of shop air but that can be less messy than coolant issues.
BTW, if you think cutting G10 is bad, try cutting laminated epoxy laced carbon graphite. |