What does waviness width describe?

Waviness width specifically refers to the average length of the waves or undulations present on a surface. This measurement indicates how far apart the peaks and troughs of the waviness are from one another. It is crucial in the context of surface finish because waviness can affect the performance and appearance of a part, influencing factors such as friction, wear, and even the sealing capabilities of mating surfaces.

Understanding waviness width helps in assessing and controlling the quality of surfaces in manufacturing processes, ensuring that they meet desired specifications for functional performance. The concept is distinct from other definitions related to surface characteristics, such as surface area, which pertains to the overall coverage of the part rather than the undulating features; the distance between two flat surfaces, which defines flatness rather than waviness; and maximum depth, which deals with the amplitude of surface irregularities rather than their average spacing.