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Maximum Roughness Depth (Rmax, Ry)

 

Maximum roughness depth refers to Rmax or Ry. Rmax is the maximum peak to valley profile height. Rmax, Ry, Rz1max or Rymax has the highest value of all peak to valley surface texture parameters. The single roughness depths are first determined by measuring the peak to valley distance within each sampling length of evaluation. Rmax is the largest of all of the single roughness depth of peak to valley height values over the entire evaluation length. Rmax is the greatest peak to valley distance within any single sampling length, which is defined as the height distance between the top of highest peak to the bottom of the lowest valley. Ry is sometimes used to refer to Rmax.

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