-MIKE- wrote:
Tom Watson wrote:
I went on Starrett's website and found that the most that they will
write up a Certificate of Accuracy for on a tape is +/- 1/32". They
also say on that website that whatever tool you use to measure with
should be capable of measuring to 1/10 of what your tolerance is. So,
if their best tape is only capable of +/- 1/32", then my tolerances
can't be any tighter than 5/16", which seems a tad generous to me for
cabinet work.
....

They're quoting an absolute accuracy--you can do much better than that
w/ repeatability using the same tape and good technique where you don't
care if the measurement is off relative to the reference NIST but simply
need to reproduce multiple pieces or partition the total length, etc.,
etc., but all w/ the same measuring device most absolute error cancels.

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