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10 bucket rule

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  • #48052

    Mike Archer
    Participant

    Hello.  From what I understand about the 10 bucket rule is that you take the tolerance range of your process divided by 10, and that should be the approximate resolution of your measurement system.  What are the consequences of too much resolution?
    Thanks,
    Mike

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    #160836

    BB Wanna B
    Participant

    The only downfall that I see in too much resolution is cost.  I have ran into situations where the 10 units rule of thumb is not enough depending on your tolerance.  You need to be careful basing everything off of tolerance, you can get burned!  What you really should be looking for is something that is sensitive enough to detect a change in your process, regardless if in or out of spec.  Hope this helps.

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    #160847

    Chad Taylor
    Participant

    Mike
    ANSI standards recommend 5% of the part tolerance be used as gage tolerance, with an optional 5% for wear allowance. This gives you a 5-10% recommended tolerance for the gage.
    For Thread gages many gage companies have posted on their websites gage selection charts for gages that best fit the class & tolerance of thread being machined. Vermont Gage is one of these companies, for example
    Hope this helps
    Chad Taylor

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