8/26/2023 0 Comments Flatness symbol gd&t![]() To improve the accuracy of the part’s assembly, a release was made between the desired contact surfaces in the assembly, and material was removed from the surface, leaving two contact surfaces that need to maintain a single plane in an accuracy level of 0.05, as presented in Figure 2. In Figure 1, the controlled element is a single surface, in both cases the tolerance zone is: two parallel planes with a distance between them of up to 0.05. The design intent is that the bottom side is the main interfacing surface of the part and it has to maintain a flatness of 0.05. The figures below present two alternatives for an adapter plate. (ASME Y14.5-2009) Among the GD&T symbols there are overlapping areas, in some cases there is no difference in functionality when applying one control method or another. ![]()
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