Decimal places for Positional Tolerances

[[La...]]

Hello All:
Here is a basic tolerance:
How many decimal places should be used for the evaluation of this Positional Tolerance?

Thank you

[[Er...]]

Totally depends on the customer and who I worked for at the time.

One company I worked for 0.799 would be rounded to 0.7 in this case. Every measurement would be 0.7 and they never had a customer complaint. We even did this for first piece submission. Evidently the customer was fine with this practice. If the customer doesn't like it they will say something.

Is it by the "book"? Depends on what industry and what book. The old school rule of thumb was a tolerance of 0.8 would need to be able to be read down to 0.08 or better and be reported as such.

My preference to make my life easier is I always report to 3 places. If management wants one decimal place reported... 20 years ago I would have balked. Now I just call out a standard and if they insist, they are paying the bills. If it goes too far I have turned in my two weeks notice after finding a place to land.

End of rant, lol

[[Ün...]]

No matter setting the decimal point. Write 0.8 as a tolerance calypso will do the rest. I have never seen it say 0.800 in the Tolerance area in the technical picture.

[[Se...]]

I don´t know in which kind of industry you´re working.
But if you have to comply with AIAG MSA, the resolution of your results shall be max. 10% of your tolerance

[[Ke...]]

From how it was explained to me...

it doesn't matter how many decimal places are called out on the print. A callout of 0.8mm should be interpreted as 0.800000; but the way I see it, reporting to 6 decimal places does not necessarily provide "meaningful" data, using most CMM's, so I only report three decimal places, unless the spec is called out to microns.
So, I would report a positional callout of 1, 0.1, or 0.01 to 3 decimal places (0.000)
And I would report a positional callout of 0.001 to 4 decimal places (0.0000)