GD&T New Standard ASME Posted Date: 30 Jun 2009     Resource Type: Articles/Knowledge Sharing     Category: News Author: Bilal Shuaib Member Level: Gold     Rating: Points: 2

American Society of Mechanical Engineers (ASME) has updated the GD&T Standard in March 2009, and the updated version ASME Y14.5 – 2009 is now in effect. Below are the brief changes/updates in this Standard: Datum feature Simulators (Theoretical & Physical) Datum Definitions -> Maximum Material Boundary (MMB), Least Material Boundary (LMB) and Regardless of Material Boundary (RMsB) Definitions of Related and Unrelated Actual Mating Envelopes (AMEs) Regular and Irregular Features of Size Interdependency Symbol New “All Over” Symbol Continuous Features Unequally disposed profile tolerances Datum Translation modifier Movable Datum Targets Flatness Tolerance to control the derived median plane of a Feature of Size Degrees of Freedom arrested by Datums Specifying the maximum geometric tolerance in the frame to limit the Bonus Three segment Composite Tolerance frame For more details, visit http://www.jytra.com/blog/gdt-new-standard-asme-y145-2009/

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