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Roughness, Roundness and Form analysis


Characterization of surface topography is important in applications involving friction, lubrication and wear. Generally it has been found that friction increases with average roughness. An accurate knowledge of the expected bearing life is essential to the proper selection of ball bearings. Bearings principally fail due to fatigue if they are properly lubricated, mounted and sealed against dirt entry. Fatigue strongly correlates with the surface roughness. One of the most important fundamental forms for engineering components is the circular cross-section. Circular forms arise in many applications, particularly in bearing surfaces. Roughness, roundness and bearing forms’ testers are critically important elements in the development of precision-tolerance capabilities. For such measurements, we use the German-made OPTACOM surface measuring machine VC-10-EL.