Tribological Behavior and Cutting Performance of Lubricants in MQL Machining

The investigation using high vacuum cutting apparatus indicated the ester and oxygen were likely to enhance mutually their adsorption activities. The experimental facts obtained by normal atmosphere cutting apparatus demonstrated that a synthetic ester for MQL machining provided the better cutting performance in the order of higher oxygen concentration in the carrier gas. However, the carrier gas of MQL did not always require high concentration of oxygen and air was found to be one practical answer to the optimal carrier gas for MQL deep drilling.