surface roughness inspection by visual tactile comparators,describes a visual procedure for surface roughness evaluation of cast iron parts using standardised reference samples.GFC Antriebs systeme GMBh USE scrata astm a802 FULL Set as reference (EN1370)。For solution finding in case of non-conformities,GFC AntriebsSysteme Gmbh recommend that the cast iron supplier procures a SCRATA reference sample set