How does a surface roughness of 64 translate to length?

Question

How does a surface roughness of 64 translate to length?

Answer 1

Surface roughness is generally specified in microinch and does not relate to a length unless the specified surface finish is specified over a certain distance.

Answer 2

You have left out the dimensions - which may be understood in a given application, but vary by field of study.  As you can see in the links given at the link below surface roughness can be nm, microinches, or a proportion in soil.

http://www.google.com/search?sourceid=na...

Answer 3

Or are you asking what the average wavelength of a surface with a roughness of 64 would be?  What spec are you referencing?

Answer 4

surface roughness has nothing to do with length!

whatever gave you that idea?