Letter 28014

SURFACE FINISH IN JAPAN STANDARDS JIS  

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Where can find explanation and symbols for surface finish in JIS.

A KAMINOULU
machine shop - TORONTO, ONTARIO, CANADA

Where can I find symbol and conversion information regarding JIS surface finish requirements? I'm referring to the "upside triangle" symbols used by most Japanese manufacturers. I need to know what the symbols mean, what numerical value is associated with them, and how to convert them to Ra or Rma.

Rick Spellman
- Mason, Ohio, US

Answer or follow-up on this subject (in non-commercial fashion).

 

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