Drilling is a process in which multi-point cutting tool cuts the material to make a hole. When drilling a hole, MQL forces reduce comparable to flood drilling.
The centrifugal forces produced by the rotation of the tool. In this sense, prevent the arrival of the fluid in flood mode. On the other hand, in the MQL mode, to say so, the fluid does not "have mass" and can be located in the edge areas that are most involved.