Tolerance Clasification 1

[lito527]

Hello All,
I encounter an old military drawing with dim 4" type
how would interpret the tolerance if template state fraction ±1/32 , .xxx ±.010
Would this consider be "open tolerance" and is there limits to this?

please advise


LVB

 

[CheckerHater]

Consider it fraction, otherwise it would be 4.0, 4.00, 4.000

"For every expert there is an equal and opposite expert"
Arthur C. Clarke Profiles of the future

 

[lito527]

Thank you

 

[Sparweb]

Concur with CH
You're lucky there IS a fraction tolerance to refer to.

No one believes the theory except the one who developed it. Everyone believes the experiment except the one who ran it.
STF

 

[lito527]

i'm still disputing it and i consider that "open" tolerance
in addition, by definition of a fraction or whole number is not a fraction. book and dictionary states that.
Therefore the fraction tolerance should not be applied in this case.

Open Tolerance, i could not find any reference on this term as well.
It's merely just to ease manufacturing which perhaps the feature is not critical.

I have a part that our QA is rejecting the part, and i'm opposing due to this issue.
The drawing was made in 1966 and was for Military use.

Thanks.

 

[dgallup]

It doesn't have a decimal point, therefore it falls under the fractional tolerance. I've never seen a 4 & 0/32" dimension.

I'm confused by the "type" you show after the 4" in the OP. Is "type" part of the dimension? Is that supposed to be "typ" as in typical?

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The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.

 

[drawoh]

lito527,

In the absence of a formal dimensioning and tolerancing standard such as ASME[ ]Y14.5, you need to ask yourself what the old drafter intended.

--
JHG