13. Measuring Short Surfaces


How much of a surface do you need to measure in order to accurately describe its roughness? But if you are measuring a narrow feature or part, such as an O-ring groove or washer, the surface may be smaller than the length suggested in the standards. In this video we show you how to determine the “evaluation length” for measuring roughness, introduce options for measuring texture on smaller surfaces, and point out pitfalls that can lead to incorrect evaluation of roughness and waviness.