finishing

[AgeOfEmpire]

Hi all friends,

I need to learn something about finishing.Could you give some information about this sentence ?
" The bore should be finished by techniques known to produce approximately 12rms "

Thanks for your interest

 

[panduru]

@AgeOfEmpire :

A link from my references:

Electropolishing FAQs

http://www.harrisonep.com/resources/faq/default.html

panduru

 

[codeeng]

If this is a machined surface finish then it represents roughness in micro inches assuming imperial units. RMS = root mean squared average. 12RMS is fairly smooth and would typically be obtained by grinding.