Having a bit of a tiff with someone on Arfcom over basic dimensions.
A basic dimension is one without a tolerance. No plus, no minus, it is what it says to infinite decimal places.
Most of the time that dimension exists as a datum for other dimensions. Those dimensions have tolerances so the thing you're making can actually be made.
This person mentions this, but goes off on how you can never hold the basic dimension without some kind of tolerance on it.
To that I say bullshit.
I've worked places that held them on mass produced items.
I will say that you shouldn't use them unless that dimension is critically important. It's expensive to set up to hold such a dim and uses more resources from quality control to assure it's being held.
But I did like him explaining to me my job for over 16 years.
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