In this project, the effect of flow rate and speed of cutting fluid applied regarding the surface roughness and tool wear in turning was being studied. The experiments were carried out by using mild steel bars as the workpiece and chemical vapor deposition (CVD) coated insert as the tool, operating under computerized numerical control (CNC) turning lathe. Four cutting parameters including cutting velocity, feed rate, depth of cut and flow rate of cutting fluids were being varied throughout the operation. Taguchi method has been applied in order to find the optimal cutting condition for the smallest surface roughness as well as tool wear in turning.