GD&T: Choosing Datums

Ғылым және технология

Drawings available at:
deanodell.com/?p=325
Reference:
ASME Y14.5-2018
See page 70-147 Section 7

Пікірлер: 46

  • @vishnusekar4839
    @vishnusekar4839 Жыл бұрын

    Thank you so much Dean, I've learned so much watching your videos that has cleared so many doubts I have had working with GD&T over the past 5 years into my career

  • @RDeanOdell

    @RDeanOdell

    Жыл бұрын

    Great to hear! Thank you for taking the time to leave a comment.

  • @kuei1215
    @kuei1215 Жыл бұрын

    This guy is a great teacher.

  • @RDeanOdell

    @RDeanOdell

    Жыл бұрын

    This guy appreciates the comment! Thankyou.

  • @vanzz3863

    @vanzz3863

    Жыл бұрын

    He is indeed

  • @Ashnek34
    @Ashnek34 Жыл бұрын

    Thank you, really great explanations to fill the theory gaps with practice.

  • @pawanraghav5178
    @pawanraghav5178 Жыл бұрын

    Thank you very much forgiving me a clear idea of choosing a datum!

  • @RDeanOdell

    @RDeanOdell

    Жыл бұрын

    You’re very welcome!

  • @solidkreate5007
    @solidkreate50072 жыл бұрын

    Thank you, it's a little clearer now but this is still the hardest part for me. Could you perhaps show us a complex geometry part? Something with organic and horz/vertal geometry?

  • @RDeanOdell

    @RDeanOdell

    2 жыл бұрын

    Hi, I’d be glad to. My website is in the description, if you have an example, you can send it by email and I can take a look.

  • @robertagill
    @robertagill2 жыл бұрын

    Your videos are clear, concise and make what can feel like a complex subject easy to understand. Thank you!

  • @RDeanOdell

    @RDeanOdell

    2 жыл бұрын

    @Rob Gill Thanks so much! I appreciate the positive feedback.

  • @GasparinPR
    @GasparinPR Жыл бұрын

    Mr. Dean you are a great teacher!

  • @RDeanOdell

    @RDeanOdell

    Жыл бұрын

    Thanks! 😃

  • @TheRedstonedeluxe
    @TheRedstonedeluxe2 жыл бұрын

    Thank you for the clear physical examples!

  • @RDeanOdell

    @RDeanOdell

    2 жыл бұрын

    Do you mean a clear explanation or a clear part? Either way, thanks so much!

  • @TheRedstonedeluxe

    @TheRedstonedeluxe

    2 жыл бұрын

    @@RDeanOdell I meant clear explanation but I guess both work haha.

  • @issamtalbi9528
    @issamtalbi95288 ай бұрын

    really, it's a very good explanation, thanks so much Mr Dear

  • @jaydippanchal073
    @jaydippanchal0732 жыл бұрын

    Great explanation. Can you please explain what would be the interpretation of those A, B & C in circle next to feature frame and the numbers 1,3 shown in the triangle..

  • @RDeanOdell

    @RDeanOdell

    2 жыл бұрын

    Thanks! The circles are revision symbols, the triangles are flag notes that refer to the general notes on the drawing. The complete drawing is available at the link in the description.

  • @rahulchaudhari3254
    @rahulchaudhari32548 ай бұрын

    Best and simple explanation Ihad ever seen.

  • @RDeanOdell

    @RDeanOdell

    8 ай бұрын

    Thanks so much!

  • @Pkstoic
    @Pkstoic2 жыл бұрын

    Always simple and clear

  • @RDeanOdell

    @RDeanOdell

    2 жыл бұрын

    Thanks so much!

  • @jon-williammurphy9780
    @jon-williammurphy97806 ай бұрын

    For an assembly like this (a machinists tool) I don't think you would want to make the holes a datum for a reason I didn't hear you mention. Chiefly because threads are typically imprecise and hard to inspect.

  • @Buitao26898
    @Buitao26898 Жыл бұрын

    It would be greatly appreciated if you would attach a pdf file mentioning what you said in the video as not everyone has a good level of English to understand. Thank you for the video.

  • @mustafahayriatl2723
    @mustafahayriatl2723 Жыл бұрын

    every single one of the examples are very good. it makes you understand better.

  • @chrmeiss67
    @chrmeiss6710 ай бұрын

    I never would use the introduced datums B and C for a functional based specification: There are no contacts at B and C! … only air.

  • @SquishMe
    @SquishMe Жыл бұрын

    Great content

  • @RDeanOdell

    @RDeanOdell

    Жыл бұрын

    Thanks so much!

  • @amzxar5049
    @amzxar5049 Жыл бұрын

    how to tell if the feature control frame's tolerance bilateral or unilateral? how to indicate that?

  • @RDeanOdell

    @RDeanOdell

    Жыл бұрын

    It can be indicated with the “U” symbol in the FCF, or with a phantom line near the part outline on older drawings.

  • @XiaoBuding-ol8og
    @XiaoBuding-ol8og8 ай бұрын

    The 3 datum targets of the first datum, resulting in the 3 points forming a surface at an angle to the coordinate plane. Question: Is there any negative effect of if the first datum plane is not being parallel to the coordinate axis at too large an angle?

  • @jeffreyrstapler
    @jeffreyrstapler2 жыл бұрын

    You are very good sir !!

  • @RDeanOdell

    @RDeanOdell

    2 жыл бұрын

    Thank you!

  • @user-ke4my4qc3l
    @user-ke4my4qc3l2 жыл бұрын

    Hello i am recently preparing for the ASME Y14.5 certification. Could you recommend practice problem book?

  • @RDeanOdell

    @RDeanOdell

    2 жыл бұрын

    I’m not certified, but my understanding is that the test is based very much on the verbatim wording of the Y14.5 standard. I recommend reading the standard cover to cover, and then have someone quiz you on particulars.

  • @danlev6927

    @danlev6927

    2 жыл бұрын

    ​@@RDeanOdell I'm learning ASME Y14.5 2009 from ASE and it's torture. I'm a CNC programmer/manufacturing tech and have a background in CMM programming and I found the tests to be infuriating because they're based on the wording and not the practical applications of the rules.

  • @ddr539
    @ddr539 Жыл бұрын

    Thank U great video for design and cmm programmers

  • @factkarwa391
    @factkarwa3912 жыл бұрын

    Hi...plz tell me the difference between orientation and direction

  • @RDeanOdell

    @RDeanOdell

    2 жыл бұрын

    Hi, What context do you mean? Is your issue in CAD and drawings preparation or in inspection?

  • @factkarwa391

    @factkarwa391

    2 жыл бұрын

    @@RDeanOdell In GD&T we always talk about orientation and direction...

  • @Mr_amazingly_awesome
    @Mr_amazingly_awesome2 жыл бұрын

    Company criteria rules.

  • @paulgallagher2937
    @paulgallagher29372 жыл бұрын

    And this is why the US can't compete with Asian manufacturing. I've studied GD&T almost since its inception. I know it extremely well. Requirements are placed on components that significantly increase manufacturing cost without providing any benefit to the customer. Now I'll sit back and let the GD&T experts tell me I'm wrong. I'll sit back and watch the western manufacturing market continue to decline while Asian market destroys them.

  • @RDeanOdell

    @RDeanOdell

    2 жыл бұрын

    Hi, great feedback! I won’t tell you you are wrong. I believe the problem is that designers and management are overly conservative in design requirements because of a lack emphasis in the design process in general, of which GD&T is just a portion. In most of my explanations I use two decimals places and .04 of tolerance. I think many textbooks influence designers in a negative way by using 3-4 decimal places and restrictive geometric controls in many examples. In my opinion GD&T is a way to get design, manufacturing and inspection on the same page, and is not limited to critical high performance items with tight tolerances. Is there something else I should be teaching my students that would help us compete with Asian manufacturing?

  • @jon-williammurphy9780

    @jon-williammurphy9780

    6 ай бұрын

    Do you think GD&T is one of the top 5 reasons the US lost the manufacturing market?

Келесі