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Thread: Doubt about the Individual FCF's for Hole and Bore

  1. #1
    Associate Engineer
    Join Date
    Dec 2015
    Posts
    5

    Doubt about the Individual FCF's for Hole and Bore

    Hello Friends


    Please refer the attached image.


    I totally confused about the single and double FCF for Hole and counterbore.


    Now how to calculate the total positional tolerance for the following conditions.


    Sl. No.) Hole Dia, Counterbore dia.
    1) 6.3 9.4-9.6
    2) 6.4 9.4-9.6
    3) 6.3 9.4
    4) 6.4 9.6
    5) 6.4 9.4
    6) 6.3 9.6
    7) 6.3-6.4 9.4
    8) 6.3-6.4 9.6




    thanks in advance


    Vinod
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  2. #2
    Administrator Kelly Bramble's Avatar
    Join Date
    Feb 2011
    Location
    Bold Springs, GA
    Posts
    2,338
    The FCF |position|dia 0.25 MMC|A|B MMC| applies exclusively to the Dia 6.3-6.4 hole.

    and

    The FCF |position|dia 0.5 MMC|A|B MMC| applies exclusively to the Dia 9.4-9.6 Counterbore hole.
    Tell me and I forget. Teach me and I remember. Involve me and I learn.

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