Surface texture measurement - Ra, Rz, Rmax, Rz1max, Maximum Height

This article discusses several key surface texture measurement parameters: average roughness (Ra), average maximum surface height (Rz), maximum of all per-sampling-length peak-to-valley heights (RMax), and the Maximum Height (Rz1max). We discuss the sensitivity to extreme peak/valley structures of these surface roughness parameters, as well as their utility for various types of surfaces, and applications.

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