Tolerance Display on Format

[looslib]

When dimensioning a part, metric drawings do not use trailing (19.05) zeros and imperial drawings do not use leading (.750) zeros.
When tolerancing these parts, do the tolerances conform to the same rules of leading/training zeros?
I do see exemptions in SME Y14.5-2009 under 2.3.1, where the metric tolerance has trailing zeros to maintain the same # of decimal places.

Now my real question pertains to an imperial drawing title block where we define the unless otherwise specified tolerances. We have X.X +/- 0.1, X.XX +/- 0.01, etc. Should these tolerances have the leading zero? I am working on some revised formats and want them to be accurate per the standards.

"Wildfires are dangerous, hard to control, and economically catastrophic."

Ben Loosli

 

[dgallup]

Everything I do is metric & ISO. There are no trailing zeros, ever. If that means a different number of decimal places between the dimension and the tolerance, so be it.

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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.

 

[CheckerHater]

From Y14.5 Para. 1.6.2 Decimal Inch Dimensioning:
The following shall be observed where specifying
decimal inch dimensions on drawings:
(a) A zero is not used before the decimal point for values less than 1 in.
(b) A dimension is expressed to the same number of
decimal places as its tolerance. Zeros are added to the
right of the decimal point where necessary. See Fig. 1-5
and para. 2.3.2

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

 

[greenimi]

Specify what you need and get rid of the title block with its UOS note.

 

[CheckerHater]

greenimi,
I could say "go metric" but I didn't

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

 

[looslib]

I have no problem with the Go Metric, but my company does!
The UOS block is a pain on your formats. I will probably change it from being parameter driven (we use Creo) to being a static block. The prior admin set up the UOS to be parametric not driven from the part or assembly file. Real pain to change when things change.

"Wildfires are dangerous, hard to control, and economically catastrophic."

Ben Loosli