netneut -- The Home Page of the Finishing Industry
A website for Serious Education, promoting Aloha,
& the most FUN smiley you can have in metal finishing has been free for 22 years,
but without net neutrality we could soon
cease to exist. Do us a solid, click on
the banner, and contact congress today!
topic 6864

Surface Roughness Conversions


I'm looking for a conversion table for surface roughness between Ra and Rz for common metal removal processes such as milling and turning. Any help would be greatly appreciated.

Joe Reames
- Charlotte, North Carolina



Go to this URL. I have found this site to be a good source for surface parameter info.

Good Luck,

Bill Boatright
- Raleigh, North Carolina


They are based on two different measuring criteria. So you can not convert one to the other like Ra to RMS. Ra is the average of all the peaks and valleys. Rz is the average of 5 of the highest peaks and 5 of the lowest valleys.

Todd Osmolski
- Charlotte, North Carolina, USA

This public forum has 60,000 threads. If you have a question in mind which seems off topic to this thread, you might prefer to Search the Site

ADD a Q or A to THIS thread START a NEW THREADView This Week's 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

©1995-2017     -    Privacy Policy
How Google uses data when you visit this site.