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Metal finishing Q&As since 1989

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Endurance

Has anyone heard of an "Endurance" finish? I have a part made from Beryllium Copper that calls for an Endurance finish. HELP!

Peter Marut
- Farmington, Connecticut, USA
2002

Did you ever find an answer to the question, "what is an Endurance Finish"?
I found this terminology on a drawing and need to know what it means?

Anthony Tinsley
Tyco Electronics - Greensboro, NC. USA
2006

Endurance finishing otherwise called endurance treatment is a metal finishing operation intended to remove all sharp edges from a flexible metal part thus increasing the service life of that part. Sharp edges create stress points and may fracture, split or break after prolonged flexing.
Removal of sharp edges and corners is most often achieved by using tumbling or vibratory techniques that are common in the metal finishing industry. The method selected will vary by the part characteristics but, in general, will be qualified by life cycle or duty testing of the part.

Mark Farver
Quality Manager - Hendersonville, North Carolina
2007

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