Manufacturing guy-at-large.


Added on by Spencer Wright.

From NIST 89-4088, "Surface Finish Metrology Tutorial," a simple graphic showing the role of Rsk when evaluating surface texture:

Rsk describes surface texture skewness. Each of the above surfaces have the same roughness average (Ra), but they differ greatly in their skewness. Rsk describes this difference, allowing for a pitted surface to be distinguished from a spiky one.

This is useful.