Turning tests were performed in a Kingsbury MHP 50 CNC lathe using as cooling system the Coolubricator JR™ MQL UNIST equipment. The MQL system used the r.rhenus NOR SSL cutting fluid, specially recommended for the machining of magnesium. The nozzle of the MQL system was directed to the tool-rake in form of mist, using an air pressure of 0.6 MPa, and placed at a short distance from the tool. Inserts used were cemented carbide inserts from Sandvik Coromant (TPGN 16 03 04 H13A), using the CTGPL 2020 K16 (ISO) tool holder from Sandvik Coromant (Table 1).