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Posted by MikeWhy on October 13, 2008, 7:25 pm
>>
>>
>>>
>>> Tolerances are commonly understood. A spec. of 5.5mm to 5.7mm can be
>>> read as 5.5mm, -0.0mm, +0.2mm. In which case, 5.499999999999mm would be
>>> out of spec.
>>
>> More commonly, though, it would be interpreted as 5.6 mm +/- 0.1,
>> with everything given to 2 significant digits (and with the accuracy that
>> that implies). But even if you interpret the spec as you do about, the
>> 2 significant digits of accuracy given say that under that "-0.0 mm"
>> limit, being under by 0.04 mm would still be OK. In other words,
>
> I'll confess that I don't truly know. If you can supply a link, I would
> appreciate it. I understood it to mean anything, even unmeasurably small,
> below or above the range is unacceptable.
The closest I could find is this: "All gauge tolerances are made to fall
within the work tolerance zones. The effect is that the gauges will always
be between the maximum tolerance limits, and no bad parts should be
accepted. The only downside is that some good parts will also be rejected."
http://claymore.engineer.gvsu.edu/~jackh/eod/manufact/manufact-128.html#pgfId-147695
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