Abstract
As a low environmental burden processing, the cold-air jet processing has been advocated. Generally, the much cutting fluid is used for the turning. The cutting fluid carries out lubrication, cooling, and chip cleaning of the processing point. In the cold-air jet processing, the lubrication of the processing point supplies the vegetable oil mist of the necessary minimal dose, and cooling and chip cleaning are carried out in the high-speed compression cooling air. In this paper, the lubricity of the cold-air jet processing has been clarified.