surface roughness measurement

How is Surface Roughness Quantified?

Surface roughness is quantified using various parameters, the most common being:
Ra (Arithmetic Average Roughness): This is the average of the absolute values of the surface height deviations measured from the mean plane.
Rq (Root Mean Square Roughness): This parameter represents the standard deviation of the surface height variations.
Rz (Average Maximum Height): This measures the average of the vertical distance between the highest and lowest points in each sampling length.

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