Home /
T.O.C.
FAQs
 
Good
Books
Ref.
Libr.
Advertise
Here
Help
Wanted
Current
Q&A's
Search 🔍
the Site

Chime right in! (no registration req'd)

-----

"What is the formula for surface finish ratings?"



 

Hello,

I work at a engine reconditioning company and I have a question regarding surface finish. At our work we use a s-tester an it gives for example a reading of 10u for main bearing journals of a crankshaft. What I would like to know is what does 10u or mirco inches actually mean. How is this number obtained. Is there a formula. Is it a certain amount of grooves or peaks per thousandth of an inch. All that sort of thing. I just would like to know how to justify what it means when somebody asks me "but what does that mean 10u ?"

Thanks,

Stuart Black
Hm-Gem engines - Berwick, Victoria, Australia
^


 

Stuart, take a look at my answer to letter 9836 www.finishing.com/98/36.shtml I think the references listed there will guide you right.

lee gearhart
Lee Gearhart
metallurgist - E. Aurora, New York
^

none
finishing.com is made possible by ...
this text gets replaced with bannerText
spacer gets replaced with bannerImages

Q, A, or Comment on THIS thread SEARCH for Threads about ... My Topic Not Found: Start 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:

 
Jobshops
Capital
Equipment
Chemicals &
Consumables
Consult'g, Train'g
& Software


About/Contact    -    Privacy Policy    -    ©1995-2021 finishing.com, Pine Beach, New Jersey, USA