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Thread: Heim Tolerancing

  1. #1
    Engineer
    Join Date
    Jan 2015
    Location
    Pittsburgh, PA
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    14

    Heim Tolerancing

    What is a common practice when tolerancing for a heim end. This would be for a spherical, aircraft type. I assume a .010 per side tolerance to the receiving end; which is a clevis type receiver.

    Thank you,

    John

  2. #2
    Administrator Kelly Bramble's Avatar
    Join Date
    Feb 2011
    Location
    Bold Springs, GA
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    2,327
    I think you're referring to the mating width between the rod end and the clevis heim? The MIL-STD rod mating end widths are more likely to be +.000 - .005 and the clevis heim +.005 -.000. If not tighter - aircraft components are generally built to more controlled standards than automotive or industrial applications.

    I would assume that you are designing an installation and have already picked either end of the rod or other assembly. I would consult the associated MIL-STD or AN standard or specification and determine the recommended tolerance structure for the installation.

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