The resolution of the measuring device should not factor into the actual
measurement beyond rounding off...

for example you have a dimension of 0.100" +/- 0.005", the following are all
the same in regards to measuring

0.005"
0.0054"
0.00543"
0.005433333333"

All the above would be within tolerance with the given criteria above.

If a specification calls out a 3 decimal place tolerance, then the equipment
used should be able to read a minimum, of 3 decimal places...anything beyond
that (not rounded off) if irrelevant.\

Regards,

Franklin



----- Original Message -----
From: "Kathy Kuhlow" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, September 18, 2003 10:28 AM
Subject: [TN] Tolerances


I am in a debate over assumptions or general knowledge with tolerances on a
print.  I want to know which way you interpret the situation.

Say you a print that has a part that should measure .187 +/- .002.  Now your
are measuring the part and the part measures .189 in a three digit but .1894
in a four digital measurement.  Would one assume that the part is actually
.1870 which would say that the part is oversized or read tolerance only off
of the third digit which would make the part acceptable?

Thanks in advance.
Kat

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