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Letter 25064
Surface finish
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Generally we indicate the surface finish in Ra & Rz values.
But one of our customer has indicated the surface finish value as 6.3
S which should be obtained by grinding method. We would like to know
what the ways of indicating the surface finish . What is the
conversion of 6.3 S in terms of Ra & Rz. We would also like know
when the difference between these three.
K.S.SreeKumar
Adhesives & Sealents supplier - Chennai, Tamilnadu, India
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Never heard of a standard "S". I suggest you go back to your
customer and advise him to specify a common standard of Ra, RMS, or
Rz.
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6.3S refers to the maximum height of a profile. I dont think it is
a SF symbol.
Nawaz Maditheti
- Minnesota, MN
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