Digital Metrology Notepad Series - The Rk Parameters

The Rk surface roughness parameters are derived from the "material ratio curve" which we introduced in our previous Notepad Series video. Today we look at the "Rk Parameters" which are derived from that curve. These parameters help us describe the peaks, valleys, and core region of a surface. All three regions may play important roles in how a surface will function: how it will wear, support a load, retain lubrication, etc. A single number cannot describe all of these traits...but the Rk parameters can.