As the plans for more and more machined metal parts include numerical surface finish specifications, the need diminishes to visually qualify that a part has, for example, "a mirror finish with no burrs" or to have the machinist with the finest touch scratch the surface with his fingernail to make sure it's "matte and rough."
Imported from the CTE archive to seed discussion on MFGAxis.
Originally published on CTE: 2016-05-15
CTE source: https://ctemag.com/articles/terms-trade-surface-roughness-measurement/
Legacy path: /articles/terms-trade-surface-roughness-measurement