David Janes
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 Posted:
Sun Oct 10, 2004 9:29 am Post subject:
Re: Need help with a dimension symbol " h ". |
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: "Robert Johnson" <bobjohnson360@msn.com> wrote
: 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 |
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