Sorry that it’s been a while since my last blog post! That simply means that our training schedule has been busy. Though a good portion of the U.S. economy is still sluggish, I have definitely seen an uptick in the number of requests for GD&T training. So remember, if you have a group of 4 […]
In my opinion, one of the most underutilized tools in the GD&T toolbox is the tangent plane modifier. It was introduced in the 1994 ASME standard, yet some people still think of it as a new concept. Shown in the example below, the tangent plane modifier (circled T) can save money by only controlling the […]
This time around, I’d like to present another “pet peeve” of mine, at least in the world of GD&T. It involves using the position symbol when the only quality being controlled is perpendicularity.
This is very common — it stems from some subconscious notion that if GD&T is going to be used on a hole, it’s […]
While everyone is ooohing and aaaahing over the new GD&T standard released in April, there is a rule that dates back to 1994 that very few people know about. And although it’s not something that would be used very often, it’s something that might be worth filing in the back of your brain…
This little-known rule […]
Several times I have heard that a designer is hesitant to use GD&T because he knows that the manufacturer will not understand it. There are several ways to answer this dilemma:
Too bad; the burden is on them to learn it
Use traditional tolerancing even though it lacks the benefits of GD&T
Use a hybrid approach, and make […]
A funny question arrived in the inbox yesterday, and it reminded me to get on here and post another entry. The questioner wondered if I’m undercutting some of my training business by giving out GD&T tips and explanations via this blog.
Not at all. GD&T is not a secret society! It’s a very useful language and […]
If you’ve spent any time around geometric tolerancing, you have probably heard it touted as the best thing to come along in mechanical design since the drafting board. And most of it’s true — GD&T Â helps us communicate a product’s design in a big way. So it shouldn’t be surprising that most industries have adopted […]
