Here’s an interesting tolerance question: Have you ever seen a plus/plus tolerance? (or minus/minus?) The ASME standard does not mention this, so a purist would say that it is illegal (see paragraphs 2.2 and 2.3 of the Y14.5 standard). But I’ve seen examples such as a hole dimensioned with:
The real problem is that, with a casual glance, you […]
When it comes to calculating tolerance stacks, there are many different methods. Some people simply take blank paper, then make a quick sketch and scribble out some numbers. While that may work for a very simple stack, it’s obviously not a very methodical approach! A better way is to use Excel or even special software […]
For those of you who actively use GD&T on a daily basis, you should be aware of the certification process for GD&T Professionals.
The American Society of Mechanical Engineers (ASME) has established a credential for GD&T proficiency, called GDTP, which stands for “Geometric Dimensioning and Tolerancing Professional.”
It is a testing process that measures your ability […]
