What Is RA and RZ Surface Finish?

Answer

A surface finish standard from Ra to Rz is something one may see in relation to iron and steel metal processing. The standards are about the smoothness of the finish. It shows the allowance from a perfectly smooth finish or exterior.
Q&A Related to "What Is RA and RZ Surface Finish"
what is Rz and Ra urface finish?
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Rb is a coldworking process that is used to get a desired surface finish. To achieve this type of surface finish, a smooth hard roller is pressed down and rubbed on a surface, usually
http://www.ehow.com/info_11368754_difference-betwe...
DIN 3141 Rz 100 = Ra 6.3 microns (various std.s from BS 308 Part 1 ~to~ JIS B0601) = Ra 250 micro-inch.
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( ′sər·fəs ′fin·ish ) (engineering) The surface roughness of a component after final treatment, measured by a surface profile.
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