I use them on nearly every assembly print small tool assemblies at the assembly level, where they are essentially L x W x H "self-fulfilling" dimensions I saw that term used here within another thread on reference dimensions, and thought it captured the meaning quite well. I also use them at the detail level, if the intent is to use "stock size", although I'm still debating with myself if that's really a legitimate application.
I think it is a mistake to add such redundant information in the notes because it opens the question of which other aspects of the standard may or may not apply. I'll also sometimes add them to assembly drawings to people dealing with it have a feeling for the size.
In fact back in the days when I have to have deliverable items NATO codified it was essential to have the overall dimensions indicated. The company I work for insists on using REF to indicate reference dimensions. I've given up on trying to convert to. I assume it is in their own company standards that they allow for the use of REF or maybe their "unwritten" standards ; If you're a company that doesn't plan on your prints being used outside of a very-majorly English speaking country then I don't think it will cause unintended consequences, at least.
Odd thing - in accounting x. REF is always reference. I think accountants established their standard before ASME had a shot at it. Minimize the usage of reference dims If they're helpful for someone in some way, go ahead and put them on, but the standard shows them indicated with parenthesis.
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Dimensioning a 2D Sketch. Suppress and Unsuppress Features. Moving and Copying Dimensions. To add a reference dimension:. You can dimension to a silhouette edge. Point to the silhouette edge, and when the pointer appears, click to dimension. To change the alignment of a reference dimension:.
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Derived Drawing Views. Multiple Views PropertyManager. Convert View to Sketch PropertyManager. Manipulating Drawing Views. Hiding and Showing Drawing Elements. Display States in Drawings. A Reference Dimension is a dimension given to any features that are just for reference — or visualization purposes. These are called out on a drawing using parenthesis i. It also could be a dimension that is described on another drawing or elsewhere. Either way, the dimension does not get inspected.
Most commonly, the nominal value and the tolerance to that dimension are shown right next to each other like this: 5. This means the dimension can go from 5. Unlike the other two types of dimensions, a Basic Dimension is a theoretically exact dimension defining the ideal exact point in space where something needs to be. These dimensions are placed in boxes and never have a tolerance following them. As you could guess, though, making something hit an exact location or dimension would be impossible for anything that we make.
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