Mercatech uses the Charmilles scale of roughness. Here is how it relates to the standards: Check with surface finish gage when in doubt. The roughness criteria are. Surface Texture Equivalents. Disclaimer: The information on this page has not been checked by an independent person. N7 = 1. 6mm(micro. Bearing Surfaces.. N6 = 0. 8mm (micro. Fine lapped surfaces.. N1 = 0. 0. 25mm (micro. Surface Texture & Machining Symbols. WAVINESS IS NOT USED IN ISO STANDARDS. Actual surface 0.6 (25 gin.) (d) Finish grinding 5. Surface Finish Chart Surface Texture Equivalents. Disclaimer: The information on this page has not been checked by an independent person. Use this information at your. Iso N9 Surface Finish Symbols
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