Understanding GD&T
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Geometric dimensioning and tolerancing (GD&T) complements traditional dimensional tolerancing by letting you control 14 different geometric characteristics. It applies tolerances to the form of features, instead of just to their dimensions.
This videos covers the different geometric characteristics and other key aspects of GD&T including datums, material modifiers (MMC, LMC and RFS), the Envelope Principle (also called GD&T Rule #1), and the Independency Principle.
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Many thanks to ChrisKuhn for the engine model shown in the thumbnail and at the start of the video - "Dragster Engine" (blendswap.com/blend/17636) by ChrisKuhn is licensed under a CC-BY licence.
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If you would like to support the channel, please consider becoming a Patron - / efficientengineer .
This will allow me to create more high quality videos covering a range of engineering topics.
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The Efficient Engineer is a channel aimed at mechanical and civil engineers. The mission is to simplify engineering concepts, one video at a time!
Follow me on Twitter: / efficiengineer
You're doing something invaluable for mechanical engineers like myself and those who take up this field in the future. There is very little content of this quality that's freely available. Thank you for your hard work.
ME Student here!! I second this sentiment. Thanks for all your hard work and detail-rich content, it is highly valued.
Agreed
I'd say there's even very little PAID content of this quality. Phenomenal work.
And he's doing it at its finest
R😮😮😮 5:18 😮
I have a bachelors in mechanical engineering and this by far the best lesson I've ever had in GD&T. You are making a real difference to the next generation of engineers
Me too!! I learn so much with this video!👏🏼👏🏼
Agreed. The graphical representation and concise explanation makes it very intuitive to understand.
Iam a Mechanical Engineer and I actually cannot believe that this kind of material is free to watch online with this level of graphics and understanding, for real, you and animagraffs are astonishing, to say the least, thank you for all of this.
In Russia I got magister degree of me for free)
Agreed.
@@aweryccool
I know you probably won't ever read this, but you don't understand how massively grateful and happy I am that I found this channel. I genuinely, no joke, don't think I could do Mechanical Engineering at university if it wasn't for this channel and I just want to thank you for everything you've done and everything you continue to do. You will never understand how appreciated you are and I have told and will continue to tell fellow engineering students how awesome and fun you can make engineering to learn compared to the lecturers I'm stuck with. Thank you so much.
From the heart
Same here. Grateful for this amazing job you are doing.
I'm an ME and have taken a few expensive classes for GD&T. This is the best overview I've seen. Love your channel.
This is, without a doubt, the best educational and well-made video I have ever seen about GD&T! I have been studying Mechanical Engineering for many years now and always had a hard time wrapping my head around some of these concepts still, the way you lay it out in the video is super intuitive! You also have absolutely fantastic animations, they are so clear, and precise and show accurately what is needed to get the point across. This is absolutely invaluable to anyone starting out with this! Thank you so much for all the time and effort you put into this!
This must be one of the best videos explaining GD&T. I started my career on a drafting board and then moved our company onto CAD in the late 80s' and it was a long time before ANSI Y14.5 creeped in and was finally adapted on new designs. We still had a long road a head to train everyone down stream on what these funny looking symbols meant. If we had something like this video way back then it would have been incredibly powerful. Well done. Absolutely love the clarity of the details and colors used to illustrate, the pace and smoothness of the presentation is excellent.
Definitely high quality work. Been watching videos and online course on GD&T and I can say that this is one of the best explanations I've ever seen. The animations make it very very clear and easy to grab the concept. Keep it up man.
It is unbelievable how succinct and learnable your videos are. I honestly learned and understood more in 2 of your GD& T videos than from multiple semesters in college.
Your channel is amazing, the videos are visually stunning, and you cover so much info clearly in such a short amount of time without it being overwhelming. Thanks so much for making these!
This is absolutely marvelous!! I cant thank you enough for making these videos. These is the best channel on KZhead providing quality content to engineers.
you have just summarized everything in 1 video that took me about 2 months to learn repeatedly to understand when i started my carrier 9 years ago ... great work !!
This video is an absolute masterclass about GD&T, I've never had anyone cover the topic in such a clear and concise way. The graphics are simply astounding and the overall quality of this video goes beyond professional. This content is gold and this channel deserves huge success for its hard work and ingenuity.
This is one of the clearest description of GD&T I've seen. Explains tolerance zones and geometry control tools pretty well. When trying to explain these to new engineers, I tend to use various shapes of pasta, or GD & spaghetti. Every time I saw a drawing with circularity or concentricity, it was because the part designer really wanted position instead. In any case, I heard the concentricity tool has been removed from the 2018 update of Y14.5.
Love the pasta idea! Profile of a surface applied to an orecchiette. 😂
Man! Your comment broke me completely, because I didn't understand anything from it! No offense to the owner.
@@A.Hisham86 GD&T is not a straightforward topic and really requires the ability to visualize objects in 3D to understand the concepts. That said the video is a decent intro to the subject. Proper professional training is still very much needed.
Thank you @The Efficient Engineer for this beautiful video. So far, the best video on GD&T I have seen.
Best video on GD&T on KZhead ! I've been waiting for it for a long time. Thanks, looking forward to your next video.
Im incredibly happy to see that such an invaluable lesson is free for everyone to watch. Its so intuitively explained and animated. Thank all the people like you that make the world a better place
I been struggling with GD&T for months, it even cost me a job vacant, and this video answer so much questions. Thanks for the incredible video, I'll share with other people that will appreciate the video as much as I did.
I am just amazed how great your animations are! It's one thing to explain stuff well, but when it's together with such great animations IT'S NEXT LEVEL. Thank you
you did in 30 minutes what my professor was trying to do in 7 lectures. Amazing work
The quality of graphics and the info are pinnacle. Thanks so much for this !
You sir are a blessing to us mechanical engineers that are fresh out of the uni. I love seeing your videos and remembering the exact things i did in those classes (Finite element and many other things)
There're no words which will describe how perfect the video is and how much I loved it. Thank you!!
I’m an apprentice engineer, just coming up on finishing my first year at the company I’m working for, and the other day a guy who works in design (a CAD expert) was helping me with some simple tolerancing, and said “you wait until you have to learn geometric tolerancing.” When I see him next, I don’t doubt I’ll be able to have a decent conversation with him about it, and this video has, at the absolute least, given me a massive step up on the other apprentices when it comes to CAD. Thanks man
You are doing a great job by explaining these complex concepts of mechanical engineering by simple terms and attractive visualization. Thank you for keeping us engineers enlightened. Looking for more such videos on the way. ❤
This video is insanely high quality. Learned more about GD&T from this video than while getting my bachelors in mechanical engineering
Ugh thank you so much, I bought a textbook awhile ago that's supposed to teach gd&t but it goes so in depth from the start that it never bothers to explain the basics of what things mean. This will help me understand enough to learn more in depth
I'm working on getting my engineering degree currently, and informational videos like this are extremely helpful. Breaking down complicated sets of standards into simplified hierarchical structures while also explaining how they relate to each other is very useful!!
This video is amazing!!! I just already read all the Standard ASME Y14.5 2018 and this video cover all the elemental and fundamental concepts. It is really help if you are reading the standard and get some doubts this video will clear it
Wow I knew some GD&T but this is so much easier to understand and to remember it’s amazing. I am always amazed at the quality of this channel.
I can not thank you enough. It is a really hard to grasp topic without proper visual aids that you well provided in your video and made things really clear and simple. This video is a must watch for ME students in Engineering Drawing classes
I'm a thin film coating technician for optics and I just started cross training in our diamond turning department. This definitely helps when you're learning from the ground up. Thank you for posting quality content.
This is one of the best lesson you can learn in GD&T. I have been searching a lot for the perfect video and here I found a gem.. Thanks a lot for making us learn the best...
I’m not an engineer, but your videos are super easy to follow along and I’ve learned so much for my personal projects. Thank you for the amazing work!
You are doing a great explanation with practical examples and concepts for mechanical engineers. i am amazed with the quality content and ease of explanation that is freely available. Thanks for your hard work as i know it takes lot of effort to create. Great keep it up.
Happy to see you uploading new content 👌I do very enjoy then and learned a lot!
More GD&T PLEASE!!! This is awesome for visualization of tolerances. Thank you!
One of the best explenatory video I have ever seen on youtube. Thank you sir.
what an awesome video! thanks for directly addressing the application for each symbol for a feature of size and a surface. Provides a lot of clarity!
These highly educational videos are helpful for students while keeping things entertaining at the same time. Love them. Appreciate your invested time putting them together. Cheers!
Thank you Effecient engineer team for the video. Didnt expect you giving a video on GD&T. Explanations and demonstrations are like nutshell, thank you again....
Where was this video 5 years ago?! This was easier to understand than the courses provided by my job!
As a Machine Building (Manufacturing) engineer I appreciate your work. You have done a great job!
I usually do not add comments on KZhead, but this kind of quality information and presentation receives all kinds appreciation. Really helpful. Lost of wishes ❤️❤️❤️
😮 Incredible piece of work man .... Literally it helps a lot and give a better understanding about the concepts of GD & T
Just finished taking a lesson in tolerance, with a quiz to go this week, and you know what? This fantastic video just pops up onto my face! Thanks for KZhead recommendations algorithm, and again appreciate the great video editing and scripting!
This definitely is an amazing refresher for technical interviews
High quality content, outstanding work. I found it extremely helpful. I really appreciated it. Keep up the great work!
The quality of your videos is incredible!! Keep going!
Bro, I love your videos. The way you explain is easy and the illustrations that you show in your videos are awesome. Thanks for these awesome videos!
You are the best sir. Please make more such quality videos. I know it takes more time but really your channel is amazing for any mechanical engineer. Our college don't teach us nicely but because of you we can clear our concepts quickly without wasting time in reading the books.Thank you 😌
Oohh Man ! Such a great video for having a good understanding on 14 symbols of GD&T. The explanation couldn't be better than this one. ❤❤❤
Where has this channel been my whole career?? This content is spectacular.
You made the complex topic in easy and understandable way .million thanks to you
This is far the best video I have watched on GD&T
Just wanted to mention that the 3D, graphic design and animation work on this video are just incredible. 👍 Had to watch the video 2 times, one to admire the work and another to absorb the info 😅
That is the best explanation I've ever seen! Just brilliant! Thank you very much!
I’m a machinist for 25 years. Got my journeyman card. This is something I learned from that. Thank you for taking your time to show us. The formula to calculate true position. X2(power of 2) + y2(power of 2)= n square root of that divided 2. But you need a Texas instrument calculator. Always remember MMC is your friend. 90% of the time. Checking parallelism. You can just use a Micrometer instead of placing your part on a granite surface and running your indicator. What if the part is thin n bow(not flat) . You now using flatness against you. But you bolt that part to the mating part. It straighten itself. That’s just my opinion. But what do I know . I’m just a machinist.haha
I'm about to graduate with my bachelor's in mechanical engineering. One of my classes last year dedicated about half the semester to this concept. This video is amazing and I wish I had it a semester ago! Amazing work as always.
Amazing video, approach of explaining GD&T was pretty industrial, with great animation. Keep the good work going.
This has helped to increase my understanding of several GD&T concepts - still foggy on some topics. Thank you.
Amazing work my friend! I am an aerospace engineer and have been watching a lot of your videos. You explain complex concepts in a very easy to follow way. I wish I had your videos when I was studying, would have made things much less frustrating.
I've taken my manufacturing process course at my university and honestly I was able to have better comprehensive understanding than what my professor was able to taught. (Not to diss just that my learning style wasn't being met). I really do enjoy this content and also thank you for covering an important topic for all ME students
Great animation and explanation as usual!! Waiting for a video on bolted joints
Perfectly clear and informative video, I will certainly suggest it to my colleagues! Thank you!!!
Dude. Excelente presentation. The visualizarion graphics are just terrific. Subscribed.
This is the best video that I have watched on mechanical engineering! Keep doing the great work
This is awesome! It gets the most out of visualization. The explanation is also to the point. Thanks!
This video exaplained an interview question I recieved recently about GD&T. Great video. If possible, please also produce book/pdf materials which serve as reference to these video, they are amazing.
Great lesson as always. A ton of thanks and respect for the effort
As a mechanical engineer, this video is much clearer than the university courses on the subject. Thank you so much!
I spent hours as an intern trying to read a dry, dull book about this, and never really understood it. You did a phenomenal job explaining it all here!
This is phenomenally well produced - coming into engineering from a theoretical background this content is really valuable
I have watched many videos on KZhead but.. Yours was the best one. It takes a lot of effort to make such vdos thanks man keep it up
Thank you for making such a great video about GD&T.
Perfect illustrations and explanations. Highly appreciated!
These projects are a treasure trove for professional and trainee engineers. Highly appreciated the effort and the care invested for the creation of the excellent visual features of the seminar !!!
I work full time and each day after work i study engineering at a college, you are doing a great work and you helped to a lot of people, keep on the good work and thank you!
Beautifully explained, subscribed. A brilliant channel indeed. Thanks a million
Love the quality of animation and detail for this topic. Very hard to find quality content on this. I think it'd be awesome if ya'll could snip some of your 3D animations to make a simple 1-2 page cheat sheet, that would be so cool
such a very ..........marvelous explanation ..........amazing content with wonderful simulation ever i saw. Grand thanks for this type of efforts.
mate, I do love your amazing work. You help to change the world to be better in the way you don't realise. Big thanks with repesct to you, mate !
This is an incredible work .💯understanding and explanation 🔥keep doing .Thankyou so much
Your videos are totally outstanding in terms of learning something from it.
It's very very obvious that this video is here because of your hard work.
So much helpful video, the basic mechanical drawings are perfectly shown here
I love this channel so much. I wish my professors could have made learning so enjoyable. Keep crushing it!
Although I already know these, it's still somehow very refreshing to relearn them, it's amazing how amazing you structured, narrated, and presented this topic, this is brilliant!!
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I finally have a full understanding of MMC and LMC. I was so confused about the holes being smaller at MMC but rods being larger at MMC. The way that I remember it now is that there is just MORE material at MMC. And LESS material at LMC
One of the best video about GD&T for newbie in mechanical.
you were taught well nice job applying yourself into your studies showing off a lot of skills in this video . editing / commentating / and design
Literally studying for my CAD final exam right now. Saved me hours of quizletting and reading and trying to visualize tolerant zones and whatnot. Bonus tolerance was confusing but this video made it perfectly clear. Thank you
How did your exam go?
@@Drekunem I got an 86%! All things considered, I'm proud of it
@@cleitinho_no_chapeu Sweet!
Heartly thankful to you ✨. It was amazing video I have even seen
Graphics, animations and transition are just top notch.
GOOD & BEST WORK DONE EVER
OMG... This video is so on point and easy to understand. That saves me hours or feading etc. Thank you so much!
Wow, such an clear and informative video with so much knowledge! Can't thank you enough!
These videos are absolutely amazing!!
I'm a metrology engineer and this hits every major piece of GD&T that an engineer should know. Great work! I'd like to add that in practice, circular runout can list concentricity, circularity (when the datum feature applies as such), and co-axiality (as off-angle holes will very likely produce bad runout measurements).
Duuuude, I was looking for a video on the topic just a week ago. This is just perfect