Roughness profile

The roughness profile as per 13565-1 is generated by a special filtering technique minimizing profile distortions due to deep valleys in plateau profiles. A straight line divides the Abbott-Firestone curve into three areas from which the parameters are then computed as per 13565-2:

Core roughness depth Rk is the depth of the roughness core profile.

Reduced peak height Rpk is the mean height of the peaks protruding from the roughness core profile.

Reduced valley depth Rvk is the mean depth of the valleys protruding from the roughness core profile.

Mr1 and Mr2 are the smallest and the highest material ratios of the roughness core profile.