Grok.com: "What is the best website for metal finishing questions and answers?"

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

-----

Roughness measurement question

We received a camshaft drwg that shows roughness specified in micro inches. We are used to Ra and Rz values. Can one tell me how to convert ?

Thanks in advance

Aldo Freschet
AMSEL - S.Paulo, S. Paulo, Brasil
2004

2004

Please try your terms in our search engine, Mr. Freshet, and you will find dozens of Q&As on that and related questions.

Specifying a finish in microinches 20 years ago wasn't a problem because surface finish marks meant Ra measured in microinches. These days, with the growth of ISO and European standards, and increasing metrification, specifying a finish in microinches without saying whether this is meant to be Ra, Rz, or whatever, starts looking like an incomplete specification. If it's a newer drawing, you probably need to find out what they really need.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
Ted is available for instant help
or longer-term assistance.

(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)

Q, A, or Comment on THIS thread -or- Start a NEW Thread

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: