ABSTRACT: The influence of Multiwall Carbon Nanotubes as a filler for Polyamide Nanocomposites was investigated in this study. A significant influence on the frictional behaviour could be shown using an universal surface tester. INTRODUCTION: Micro- and nanoparticles are used for reinforcement of materials. In a lot of cases the bulk properties like modulus are not so important. Surface properties or functionalities like wear or scratch resistance, elastic and plastic deformation and frictional behaviour are of more importance in some applications. Optimization of friction/wear-properties especially on curved and topographically structured surfaces need access to measurement technique, which covers the gap between micro and nano scale. MICRO STRUCTURE ANALYSIS: The investigations are done with an UST (Universal Surface Tester). It performs three scans along the surface, one with a defined load on the instruments tip. The total deformation G and its elastic and plastic parts E and P could be calculated from the profiles  and  measured with minimum load (0.7 mN) and  with a load range between 1 and 100 mN. In addition the frictional forces could be measured simultaneously MICROTRIBOLOGY: During the standard measurement the load on the surface is controlled. At the same time the tangential forces during the movement of the tip over the surface could be measured. With this additional information of the frictional force it is possible to calculate the coefficient of friction μr. Figure 2 shows the frictional force versus measurement path for a 5 mm steel ball with 70 mN load against the polyamide/CNT nanocomposite.