Need help with a dimension symbol " h ".

Discussion in 'Pro/Engineer & Creo Elements/Pro' started by Robert Johnson, Oct 9, 2004.

  1. Robert Johnson

    Robert Johnson Guest

    I am new to CAD and reading prints and from time to time see a " h "
    being used between the dim. line , what does that letter represent ?
    (height or hollow or is it a DATUM letter ) Thanks - BJ
     
    Robert Johnson, Oct 9, 2004
    #1
  2. Robert Johnson

    David Janes Guest

    : I am new to CAD and reading prints and from time to time see a " h "
    : being used between the dim. line , what does that letter represent ?
    : (height or hollow or is it a DATUM letter ) Thanks - BJ

    Are you seeing something like 25 h7? If so, the h designates a class of fit
    between hole and shaft documented in ANSI B4.2. This is part of an ANSI/ISO
    standard for metric fits.

    David Janes
     
    David Janes, Oct 10, 2004
    #2
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