The object in this report is to establish “Mild-Cooling Air Machining Method” that removes cutting heat by two ways, one is mild-cooling air jet spray on just cutting point and the other is cooling water, using water flow in passage made in cutting tool. In this report, the same experiments are curried out as reported in the first report by use of the heat removing method of combination with both holder cooling and mild-cooling air jet. The experimental results indicate that the flank wear width W_b and the ten-point average roughness R_zjis are made better in accordance with the decrease in the tip temperature difference T_c. Mild-cooling air machining method is more effective than using mild-cooling air jet or holder cooling method. The method to calculate heat flow rate released around the tool edge Δq is established by evaluating tool temperature distribution. Experimental equation for predicting W_b is proposed as a function of Δq, and it's accuracy is verified. It can be also confirmed that time constant of tip temperature rise is in proportion to T_c.