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When to replace Belville washers?

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  1. southbury's Avatar
    southbury is offline
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    When to replace Belville washers?

    So, after 2 years of research.


    When do Belleville washers need to be replaced?
    Assuming I got this wrong on my exam.


    answers were
    every time
    any deformation
    after 25% deformation
    50% deformation


    answers need to cite a ANSI/IEEE/NETA etc document.
    I would expect IEEE

    and FYI actually contacted Belleville, They cite using "industry standard" i.e no answer

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  3. SecondGen's Avatar
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    Quote Originally Posted by southbury View Post
    So, after 2 years of research.


    When do Belleville washers need to be replaced?
    Assuming I got this wrong on my exam.


    answers were
    every time
    any deformation
    after 25% deformation
    50% deformation


    answers need to cite a ANSI/IEEE/NETA etc document.
    I would expect IEEE

    and FYI actually contacted Belleville, They cite using "industry standard" i.e no answer
    What was your answer? According to the author notes in this article, the answer is not "every time:" https://www.ecmweb.com/content/artic...lleville-blues

    I contacted two manufacturers, and they said reuse is application- specific. The differentiating factor is whether your Belleville has sharp edges or not (most Bellevilles do not). Belleville washers do not lose spring capacity. If a manufacturer says to reuse a Belleville, then doing so should result in no performance loss whatsoever.
    My guess would be "any deformation" because any kind of deformation would affect its locking capabilities. If its too flat or warped it wont lock or seat properly.

    How would you gauge if a washer is 25% or 50% deformed? That seems pretty specific and open to interpretation.

    Sorry I don't have any documents to back this up, its just my take.

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