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For surface roughness measurement, it would seem like “non-contact” methods would always be preferable. After all, being able to measure a surface with no possibility of contact damage would always

We wanted to take a moment to wish everyone a great season and happy new year. We’d like to express our gratitude for making it through all of the “peaks

Pierre-Gilles de Gennes, Françoise Brochard-Wyart, David Quéré, 2003 When I started the Surface Roughness, Texture and Tribology class some 20 years ago I searched for good descriptions of the physics

Tracking the ratio of several bearing ratio parameters can provide information about the symmetry of the surface texture, which can sometimes be more important than the amplitudes of the peaks

Benoit Mandelbrot, whose birthday we commemorate on November 20, found commonality in the math that describes patterns and distributions in nature and modern life. Mandelbrot saw order in phenomena that

The American Society of Mechanical Engineers’ ASME B46.1 standard defines surface roughness, waviness, and lay, as well as parameters for specifying and controlling surface texture. Learn what it covers and

Cutoffs define the band of spatial wavelengths that will be included in the calculation of surface texture parameters. Per specifications, the cutoffs must be specified. So, what do you do

In my office I have dozens of books that I consider primary engineering texts. But there are a few that I consider essential. Anton van Beek’s Advanced Engineering Design is

Ra, the roughness average (or average roughness), is the average of the surface heights along a measurement trace. Sa is the average roughness over a measurement area. Can we calculate

Some paint finishes are purposefully glossy or shiny. Others appear matte, or dull, or hazy. So, what leads to the difference…and what do all these terms really mean? Texture scatters