Ever wondered about High Pressure Coolant Techniques?
High pressure coolant pumps have been around for the past 20 years. The concept is to (as the name implies) pump high pressure coolant through the coolant manifold creating a localized pressure increase that eliminates the formation of vapor, specifically around the cutting surface. The force of the liquid, the result of both mass and acceleration directed at the point of cut, does the job very efficiently.
This results in a high rate of heat transference on top of the primary job of lubricating the interface between the tool’s cutting edge and the work piece.
Here’s a great article from Productionmachining.com.