Boundaries & there Purpose

[Jkirk]

Hi All,
I've seen plenty of methods to calculate certain boundaries per ASME Y14.5 2009. Can anyone share applicable engineering/design reasons these become very important to know?

1. (Inner Boundary)
2. (Outer Boundary)
3. (Least Material Boundary)
4. (Max Material Boundary)

Keep it light & right.
-Jeff

[Kelly_Bramble]

“Keep it light and right”

Knowing where the as-manufactured materials boundaries are may be critical to fit and function and sometime form. Thin or thick – know it.

Inner boundary – clearance or enough material for function (strength).

Outer boundary - clearance or enough material for function (strength)

Least Material Boundary – the worst-case boundary that exists on or outside the material of a feature(s) and is defined by the combined effects of size and geometric tolerances. applicable to a Datum feature only (LMC applies to a feature of size related to a datum).

Maximum Material Boundary - the worst-case boundary that exists on or outside the material of a feature(s) and is defined by the combined effects of size and geometric tolerances. applicable to a Datum feature only (MMC applies to a feature of size related to a datum).