GD&T: Decoding Datums

[tomaszb]

Thanks for your videos. You are doing a fantastic job! This channel is the highest level of sharing GD&T knowledge. Masterpiece! Regards from Poland ; )

[jefffrodermann]

I appreciate every video you put out. It is clear you work hard to become a subject matter expert not only at gd&t, but also Zeiss Calypso programming and many other things. Thank you for sharing your knowledge. You are much appreciated!

[anthonybailey]

Love the new screen, much easier to see and follow. Thanks for taking the time to make these videos, very informative.

[tyronefentress]

Great info on your videos love watching them, all of them

[MattyMcCritic]

Awesome explanation, the true position call outs to datum A (bottom of the part) being on some drawings but not others was driving ne crazy.

[letsgosurfingdude]

GD&T by Bruce A. Wilson has a definition of DATUM and DATUM FEATURE. Can you make another video to explain the difference between DATUM and DATUM FEATURE?

[JesseSchaffer-gtco]

I have question about the feature control frame on the bolt circle at the very end of the video. what would it imply if you used ABD instead of ADB? Thanks for the great videos !

[austinbland]

Please don’t stop making these videos.

[Rick-hoci]

So can you measure the position of diameter .375" on a surface table? or cmm is required ?

[kaleshkumark.s.]

Could you clarify how to interpret B-B in FCF. Where datum B is the center axis of pattern of two holes.

[rhvreugde]

What about clocking of the hole pattern?

[richp]

I have a question, the 2.250 bolt circle, how would a bench inspector measure that? I can measure it no problem on my CMM but how can I confirm my numbers on the plate? Really like your videos. Thanks

[jeffbong]

As usual, Dean videos' are very pragmatic and useful. I really love to watch how Dean explain every sibgle detail of GD&T.
One question for this Datun topic:
How to interpret tha Datun B and C if both of them are a FOS holes?
I saw this isbquite common in other videos but not sure how each axis of hole B and C constraint the DOF.
Hope you can explaine this and best make a video on this.
Thabk You very much.

[thegamingannex]

I'm a little confused by the dimension at the top: [⌖|Ø .007|A|DⓂ|B]. Perhaps I don't understand Ⓜ. Isn't this maximum material boundary? So the part can float in D? That is, you would need three points of contact with |A|, you can translate the part in |DⓂ| until you get it where you want, and then you have to have 1 point of contact with |B|. Maybe this is what you were saying but it went over my head.