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20RA vs #8 finish

RJT

Titanium
Joined
Aug 24, 2006
Location
greensboro,northcarolina
We have a profilomiter that can give us readings in several different formats. I can buy material with a #8 finish, but my requirement is for a 20RA finish or better. How do the two compare, or is it a totally different kind of measurement? Will a #8 finish be equal or better than 20RA ? RJT
 








 
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