Numerous researches are being carried out for machining to meet the growing technology and increasing demand. A significant part of them has been the examination of the relationship between cutting parameters and surface roughness, tool wear and cutting forces. In recent years, researches are explained that vibrations, sound level and current value of the machine have been related to tool wear, surface roughness and cutting forces. With more economical and easy to use measurements, the machining process is more understandable and controllable. In this study, the relationship between CuZn39Pb3material in the CNC lathe machine, under the dry cutting conditions, 4 different feed rate, 5 different depth of cuts and 4 different cutting speeds effect on sound level, vibration, current value and surface roughness values. Analysed by RSM (Response Surface Methodology). Optimum cutting parameters are determined. As the increased of feed rate, surface roughness, Sound level, vibration and current value of the machine increased. Vibration value residue, surface roughness value and sound level increased. It was investigated that there is a strong correlation between the increase of the machine current value and the sound level.