Improving the machining surface quality is one of the most significant aspects in the field of manufacturing technology and only by improving it, machines can achieve high accuracy, long duration and high efficiency in both economic and technological aspects. The High Speed Machining (HSM) can deliver not only outstanding productivity but also high accuracy and required roughness even in the condition of hard materials. In this report, the authors evaluate the effect of the cutting conditions: v(200 - 400 m/min), s(0.02 - 0.06 mm/tooth), t(0.3 - 0.7 mm) to surface roughness Ra when machining SKD11 steel by the Sandvik face milling tool.