Contact model and evaluation of friction force molecular component

According to the level of measurement scale, friction force changes its nature and is determined by different depend-encies. The paper views a procedure for determining molecular component based on evaluation specif-ic shearing resistance links un-der elastic interaction silicon nitride cantilever needle having steel sample, used scanning section sample surface in nanometer range with an atomic microscope (AFM) «FemtoScan» under low loads. A sensitive element (measuring device) acts as sensor measuring both: normal load very roughly, change force, applied known stiffness, including value rod form alteration. It also (to assess mo-lecular route «smoothest» itself was chosen). provides analytical assessment contact parameters nano-scale, rep-resented spheri-cal indenter, half-space study, Hertz theory. Analysis calculation experiment data indenter during showed good convergence results deviation even values from experimental no more than 7,5 %. Calculations using established formulas that increase at nanoscale, coefficient decreases due faster growth spots state (provided angularity inequalities related sub-roughness remains constant), which confirmed course experiment.