In this Question Line video, Jason answers the following questions regarding reporting size dimensions with a CMM:
- When reporting against a plus/minus size tolerance of a hole or shaft, what actual value do you put on an inspection report? Is it the UAME? I have had issues with CMMs reporting an average size, passing the part off as good but then it not fitting correctly.
- Is the concept the same when reporting against a plus/minus length tolerance?
Jason first briefly explains Rule #1 of GD&T before diving into the criteria needed in order to accept or reject a feature of size. He also discusses manual vs CMM inspection and the reporting requirements of the ASME Y14.45 standard (Measurement Data Reporting standard).
Are you looking for answers to your GD&T questions? Submit your question at the link below and it may be the star of our next Question Line video!
https://www.gdandtbasics.com/share-your-gdt-questions/
If your question is selected, you will be notified when our answer is posted to our YouTube channel.
* If you are a current student, reach out to us directly and we will get you into contact with your instructor. Active students’ questions receive a direct response within 24-48 hours.
Stop hunting through pages. Get our GD&T Symbols Chart—your quick reference guide with every symbol on one page.
Save it to your desktop or print it out for quick reference. We’ll send the digital chart straight to your inbox. No spam, just helpful GD&T resources.
Get Your Free Chart