MARYLAND METRICS
Notes: 1. Triangles,, or R on a drawing indicates peak to valley roughness measurementsin micrometers (microns). (one micron = mm)2., R on a drawing indicates AVERAGE roughness rather than peak to valley values.(R is the unit of measurement in micrometers) the American standard per ASA (average roughness in micro-inches)RzataMail 261, OWINGS MILLS, MARYLAND 21117Warehouse: 6119 OAKLEAF AVENUE, BALTIMORE, MARYLAND 21215The one-stop sourcefor all your METRIC HARDWARE needs!filename:SECTION:VERSION: MARYLAND METRICSPhones: (800) 638-1830 (410) 358-3130FAXes:(800) USA-9-FAX(410) 358-3142=[800-872-9329]PAGE:SURFACE ROUGHNESS guidelines for feasible roughnessfor different processing methodsRaAVERAGE ACHIEVABLEROUGHNESSFINERCOARSERRoughness values in micro-inchesare 40 times the values in micrometersThe data in the right hand table is furnished only for practicalinformation and to provide an idea of the achievable roughnessfor different processing data is primarily for metal surfaces.
Notes:1.Triangles, ,orR onadrawingindicatespeaktovalleyroughnessmeasurements inmicrometers(microns). (onemicron=0.001mm) 2. ,R ...
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