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

HomeFAQsSuggested
Books
Help
Wanteds
Advertise
on this site
FORUM
current topics
Live! From Pine Beach NJ: The world's most popular metal finishing website, and the internet's friendliest corner

topic 17408

Surface Roughness Question


2002

I have a customer drawing that has a surface roughness symbol on the drawing that I have not seen before. It has a surface finish of 50 and a then there are two numbers under the horizontal line. The first number is 0.030" (This is the roughness sample length) and then the second number(this is my question) of 0.002 (is this a tolerance?). The two numbers are separated by a comma.

Thanks, Tom 50 ___________ \/ .030, .002 Tom Fitzpatrick
- Trenton, New Jersey


2002

You are probably right about the roughness sample length figure. Regarding the 0.002 figure, it could be an incorrect conversion into micrometers of 50 (because it actually translates to 0.0012 mm that is 1.2 micrometer). You can find a good description of thes roughness symbols (the V etc.) in ASME Y14.36M-1996 which you can also find at www.predev.com/smg/specification.htm.

Giovanni M. Ciriani
- Altavilla, VI, Italy



If you have a question in mind which seems off topic, please Search the Site

ADD a Q, A, or Comment on THIS topic START an UNRELATED topicView CURRENT HOT TOPICS

Disclaimer: It's not possible to 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 may be deliberately harmful.

  If you need a product/service, please check these Directories:

JobshopsCapital Equip. & Install'nChemicals & Consumables Consult'g, Train'g, SoftwareEnvironmental ComplianceTesting Svcs. & Devices


©1995-2019 finishing.com, Inc., Pine Beach, NJ   -   About finishing.com   -  Privacy Policy
How Google uses data when you visit this site.