Can a feature of size without any geometric tolerance have an IB or OB?

[Tarator]

Hi all,

I am wondering, from simply a definition point of view, whether a feature of size without any geometric tolerance applied to it can have an IB (inner boundary) or OB (outer boundary), based on ASME Y14.5-2009?

Thank you.

 

[Belanger]

Certainly. That IB or OB would simply be the max or min size as allowed by the given size tolerance. (This assumes that it's a rigid part, not a commercial stock size, etc.)

 

[Belanger]

To clarify -- I should have said the MMC, which is of course the max or min size, as appropriate.

This chart might help. The asterisk is just a reference to Rule #1.

 

[Tarator]

Belanger,

Thank you. I thought so, too. But I was not sure.