What Parameters are Used to Quantify Surface Roughness?
The most common parameters used to quantify surface roughness are:
Ra (Average Roughness): The arithmetic average of the absolute values of the surface height deviations measured from the mean plane. Rq (Root Mean Square Roughness): The root mean square average of height deviations taken from the mean plane. Rz (Ten-Point Mean Roughness): The average of the absolute values of the five highest peaks and the five lowest valleys over a given length.
