Home /
T.O.C.
FAQs
 
Good
Books
Ref.
Libr.
Advertise
Here
Help
Wanted
Current
Q&A's
Search 🔍
the Site
pub Where the world gathers for
plating, anodizing, & finishing Q&As since 1989





"Speeds and feeds vs. surface finish"



-----

2005

WHAT IS Ra VALUE? HOW CAN Ra VALUE BE MEASURED? WHAT IS THE DIFFERENCE BETWEEN Ra AND Rz? IS THERE ANY FORMULAE, WHICH CALCULATES AND GIVES THE FIGURE OF SPEED AND FEED IN CONNECTION TO THE DIAMETER AND CUTTING SPEED, SO THAT WE CAN PRODUCE THE PARTS ON A CNC WITHOUT A NECESSITY OF CHECKING THE Ra VALUE, AFTER THEY ARE MACHINED?

Jacob Ebanezer
Jacob Ebanezer
forging & turning - Jamnagar , India



2005

Hello, Ebanezer, welcome to finishing.com. Please try our search engine at the left of this page because your first three questions have been answered many times already. Certainly the slower the feed and faster the speed, the finer the finish. But I think you need to name the substrate material and the cutting tool material before the fineness of finish can be projected. Maybe a specialist will correct me.

Ted Mooney, finishing.com
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey



Profilometer: Pocket-Surf

Affil. Link
Your purchases make finishing.com possible

2005

Ted gave you some information that maybe of help; however, let me give you the short cut. Get a profilometer. A good one will have a programmable or scale selection which can measure on at least 2 or 3 scales. There are no good manual systems because of the human factor.

tony kenton
AF Kenton
retired business owner - Hatboro, Pennsylvania


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



(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:

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


About/Contact    -    Privacy Policy    -    ©1995-2023 finishing.com, Pine Beach, New Jersey, USA