If you’ve been keeping track of the new GD&T standard, then you’re probably aware of most of the bigger changes. (Yes, I know that 2009 doesn’t sound “new,” but most people still call it the new standard since it takes a while for companies to switch to a new dimensioning standard.)
The new item I want […]
Another new feature that was introduced in the 2009 standard (ASME Y14.5-2009) is the option of creating a “non-uniform” tolerance zone for either of the two profile symbols.
Recall that the profile symbols normally specify a uniform boundary or bandwidth that is centered around the “true” or perfect profile. This true profile is first established by […]
OK — time to dive into another item that is new in the world of geometric tolerancing. The standard that was released earlier this year expanded the definition of a “feature of size.” This has an impact in that some GD&T symbols can only be applied to “features of size,” most notably position.
The 1994 standard […]
If you are a regular user of GD&T, you probably know that the ASME standard was recently revised (for details, see the blog entry below dated March 28, 2009). In today’s column, I’d like to introduce you to one of the changes.
The term “maximum material condition” or MMC has been around for a long […]
Well gang, it’s finally here! The new standard for GD&T has been approved and will be shipping in the next week or two. If you’ve been around GD&T at all, you should be somewhat familiar with the 1994 standard; this new edition of Y14.5 will gradually be taking over as companies make the switch for […]
