With the new chgs to ANSI Y14.5 1994, they have added a modifier to Profile tolerance calledUnequally Disposed Profile Modifier depicted by the symbol U within a circle.
The dimension that follows this modifier is the amount of the tolerance that is to be applied to "In-Space" (as opposed to In-material)
While a profile tolerance applied to the exterior of a part it is obvious that "in-space" would be a plus tolerance. What is not so obvious, at least to me, is where that "in-space" is when the tolerance is applied to a cavity within the part. Is "in-space" then to the interior of the cavity or the exterior? Does this change if the cavity it thru vs. blind?
I'm ordering a copy for the latest, but would like to know your opinions on this.
The dimension that follows this modifier is the amount of the tolerance that is to be applied to "In-Space" (as opposed to In-material)
While a profile tolerance applied to the exterior of a part it is obvious that "in-space" would be a plus tolerance. What is not so obvious, at least to me, is where that "in-space" is when the tolerance is applied to a cavity within the part. Is "in-space" then to the interior of the cavity or the exterior? Does this change if the cavity it thru vs. blind?
I'm ordering a copy for the latest, but would like to know your opinions on this.