Profile tolerance without datum. Dec 18, 2014 · The answer is that it depends.

Profile tolerance without datum . Removing the datum feature references results in only form being controlled. This means that the profile tolerance has to be tighter than the size tolerance due to Rule #1 and serves to refine the surface. The tolerance points to a surface, and it has a circle at the knee of the arrow. These tolerance types can be distinguishable in terms of their tolerance zones. Oct 8, 2007 · On Pete's OP then, if he had a simple block part, datum A is a face, Datum B the longer edge and C the short edge and he had a profile callout on say the edge opposite of datum B without referencing any datums, then the location of the surface is not controlled, just the form. With datum features referenced, form, location, and orientation of the surface are all being controlled. Jan 6, 2025 · Jason walks through a few examples to show the difference between profile of surface with and without datums referenced in the feature control frame. The profile tolerances are the only geometric tolerances that may or may not have datum feature references. Once again we have a profile tolerance without a datum reference. A profile control without any datums attached to it is a form control. The all around symbol tells us that the tolerance applies all around the part, but only in one view. The tolerance zone of flatness is always two-dimensional, which is established using two perfectly parallel lines or planes. Think of a datumless profile control as restricting the smoothness of the face/surface. That circle is the 'all around" symbol. Dec 18, 2014 · The answer is that it depends. com Feb 18, 2025 · The flatness never requires a datum for its complete definition, while the surface profile may require a datum depending upon its application. Without a datum feature reference in the feature control frame, the profile tolerance is controlling form, or size and form if the size dimension is basic. The product specification would then be incomplete. Without a datum feature reference, profile of a line is very similar to the See full list on fractory. jvozz gwstid ixags qlvldl mqkfl yyncw dcs tfqlbqv mkie apwhiu