No cost, no registration, no passwords -- just aloha, fun & authoritative answers
(as an eBay Partner & Amazon Affiliate we earn from qualifying purchases)

Where the
world gathers for metal finishing
Q&As since 1989

-----

Valve mfgr. needs to know SPI to Ra relationship

How can we compare the SPI surface finishes to a part surface Roughness Average (Ra)? We realize every situation is different, but is there comparison chart showing the SPI Mold Finishes and how they may equate to a molded part surface finish in microinches?

Mr. Paul S [last name deleted for privacy by Editor]
Valves and Pressure Regulators - Lockport, New York, USA
2003

Ed. note:

March 31, 2008

Hi, Paul. letter 20910 should help. Good luck.

Regards,

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

(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: