Rms surface roughnesstable

For the roughness profile, Rq is referred to as the root-mean-square roughness, while Wq is referred to as root-mean-square waviness for the waviness profile.

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This section explains the main parameters of ISO 4287:1997. Each parameter is classified according to primary profile (P), roughness profile (R), and waviness profile (W) in order to evaluate different aspects of the profile. (When the wavelengths of the waviness and primary profile components are compared, the surface roughness component is the asperity component of that which has the comparatively shorter wavelength.)