No passwords, no registration, no paywalls, no popups, no AI

As an Amazon Associate & eBay Partner we earn from affil links

finishing.com -- The Home Page of the Finishing Industry

Search our quarter-million Q&As

Home of the finishing HOTLINE since 1989

-----

Surface Finish Standard

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
2003

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.

AF Kenton
retired business owner - Hatboro, Pennsylvania
2003

6.3S refers to the maximum height of a profile. I don't think it is a SF symbol.

Nawaz Maditheti
- Minnesota, Minnesota
2006

Sorry! Finishing.com is temporarily Read-Only.
Ted Mooney is retiring but I have several offers to take it over.
We're working hard to make sure we find it the best new home.

Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories: