This is the first in a series of GD&T video lessons. I explain: Datums Feature Control Frames Basic Dimensions Material Condition Modifiers
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Пікірлер: 164
@user-vo9bt1wo6d3 ай бұрын
I stopped watching after 34 seconds when he did not identify an axis as a possible datum. ASME Y14.5-09, 1.3.13 Datum : a theoretically exact point, axis, line, plane, or combination thereof derived from the theoretical datum feature simulator.
@goodsamaritan3991
2 ай бұрын
I don't think your statement is fair. (1) This is Lesson 1. (2) An axis is a type of line. (3) Mr. Odell is trying to communicate a general concept. Teaching is an art. I really appreciate the way Mr. Odell is teaching. Quoting "the law" directly from ASME Y14.5 (like you have suggested) when one is just starting out in one's GD&T journey may not be the wise thing to do from a pedagogical point of view. (4) Mr. Odell, please proceed.
@MarkSummersCAD
2 ай бұрын
If you quit listening at 34 seconds, it is your loss. Great intro video.IMHO. When I teach GD&T in my ENGR 1304 class, if I can get students to understand these four concepts, I feel I have done a good job.
@phanders88
Ай бұрын
OH MY GOD NOOOOOOOOO!
@wyattb3138
21 күн бұрын
This video series got me a good design internship and it’s great to review.
@Capnmax Жыл бұрын
I trust this man based on the amount of pens and pencils in his breast pocket.
@SoSaysYou
7 ай бұрын
I trust the pony tail. My college drafting instructor also had a ponytail.
@MaxTheSpycar3 күн бұрын
Im about a year along my 3d printing hobby and didnt really need this stuff. As Ive been diving more into design,I found myself here and Im hooked. This is just the nerd food my brain needs. all jokes aside I learned a lot, probably need to watch the video a few more times but the instructions are clear even if they are a bit over my head for now. Kind of shocked this video only has 133k views.
@paulbaird13512 жыл бұрын
By a far the best GD&T instructional I have found on YT. Mr. Odell you rule!
@RDeanOdell
Жыл бұрын
Thank you so much!
@liangqifeng25
8 ай бұрын
I second
@Chrisdschannel3218
3 ай бұрын
Listening to this at work so I can build more skills and get a better, higher paying job. Thank you!
@vor6126 Жыл бұрын
this guy is the greatest GD&T instructor in the world. much love
@xuchao5411 Жыл бұрын
Dean, I come to say thanks to you. I just passed the GDTP Senior and certified in the 2009 version. Appreciate your generous videos, these really help me lot. I come from China where the KZread is forbidden, anyway I come to share you the good news. And best wished to you! You are the man!
@TylerDaSilva522 Жыл бұрын
I'm studying GD&T as fast as I can to prepare for new job position. Going from civil engineering to mechanical engineering. This is very helpful! Thank you for sharing these videos.
@sophiapappa849
20 күн бұрын
Hi! I am currently trying to do the same. Did anything else help you with this transition and interview process?
@TylerDaSilva522
19 күн бұрын
@@sophiapappa849 All the jobs I saw were pretty hyper specific. You need to narrow down what you're looking for and then study what they list in their job description.
@kevinhill4929 Жыл бұрын
Been looking for content like this on youtube for a long time. Simply and thoroughly explained with great examples. Thanks Dean!
@RDeanOdell
Жыл бұрын
That’s why I made it! I remember years ago looking for good GD&T content for myself on KZread and not being able to find anything useful. I’ve tried to provide the best I can with the tools I have.
@forge721 Жыл бұрын
You’re doing gods work, this level of teaching is worth so much
@RDeanOdell
Жыл бұрын
Thanks!
@DarthJeremy3646 ай бұрын
You are an excellent teacher and thank you so much for your service!
@MrAkosFintor9 ай бұрын
Yessssir. Machinist here, reviewing things. Excellent info. Clean, straightforward. Thank you very much, Dean!
@WIP04 ай бұрын
3:34 That is absolutely 💯 correct. Datums whether it could be ABC or XYZ or 321 are basically an absolute common ground or a foundation or a reference where a designer, manufacturer and quality inspector come together to speak of & understand the same concept without leading them to any incorrect interpretation.
@ellisdickinson5972 Жыл бұрын
I’ve been looking through all the other GD&T KZread material for my work and they are not explained like this, fantastic video!
@RDeanOdell
Жыл бұрын
Great to hear! Thanks so much.
@abdulmujeeb9489 Жыл бұрын
This gotta be the most informative video about GD&T out in the internet .
@RDeanOdell
Жыл бұрын
Thanks so much! It’s actually an hour long lecture in person, but I fast-forward and edit parts so that it comes out to about 25 minutes for KZread.
@braizo3804 Жыл бұрын
Man, your explanation is so good that even I, a Brazilian who doesn't understand English that well, managed to learn it! Thanks!!!
@RDeanOdell
Жыл бұрын
Great to hear! That’s great you can follow! I try to use clear language and limit the technical jargon whenever possible.
@willmermauriciobarreraliza2304
11 ай бұрын
@@RDeanOdell I don't native english speaker and thank you a lot, you spoke clear and a perfect speed.
@Brianedwardkent Жыл бұрын
Just found these videos. They are awesome! Just what I needed.
@RDeanOdell
Жыл бұрын
Thanks so much! I have several videos in this series, as well as many shorter videos covering various GD&T topics.
@abolfazlzolfaghari3214 Жыл бұрын
He is the best GD&T Instructor of GD&T I have ever seen!
@RDeanOdell
Жыл бұрын
Thanks so much for the support!
@AbimanyasudhanThilagamRamachan2 ай бұрын
I am impressed with the value of information that has been delivered in the video. Kudos to you @R. Dean Odell.
@RDeanOdell
2 ай бұрын
Thanks! There are 7 more videos in this series as well.
@rizalardiansyah4486 Жыл бұрын
I'm glad that I found this channel! Thank you for sharing this with us!
@RDeanOdell
Жыл бұрын
Great to hear! I have lots more videos on the topic
@michaelingham26835 ай бұрын
This is simply outstanding! As an EE, I’ve dreaded learning this, but this is so practical and explained so clearly, I wish I started sooner! I really lucked out finding this channel.
@RDeanOdell
5 ай бұрын
Glad it was helpful! Lots more videos as well.
@thompsonolorede9592 жыл бұрын
Dean, wow this "Straight to the Point" is so beautiful and is so easy to understand. Thank you for this powerful easy to see approach. I will look out for more of your videos
@RDeanOdell
2 жыл бұрын
Awesome to hear! Glad you found it helpful. I use this lecture as an introduction to GD&T in my courses on print reading.
@xxwill6xx576Ай бұрын
i learned more here than at the 4 hour "training" session as my workplace... thanks!
@RDeanOdell
Ай бұрын
I’ve been through those too, let me guess, they used PowerPoint?
@bradd8841 Жыл бұрын
Dean Odell, thank you for your post. I appreciate what your doing. The Gd&t Subject can be a little dry for many engineers and designers. I like how you add your own twist to the subject and make more interesting.
@RDeanOdell
Жыл бұрын
Thanks so much! I try to explain things in my own way, and not just read off what is in a book. Sometimes I make mistakes, but I think explaining is more important than presenting information.
@davidhathaway33695 ай бұрын
excellent, GD&T was a mystery to me before watching this, thanks very much
@Darshan_Br9 ай бұрын
I have seen so many videos on KZread. But this man has touched my heart for his teaching style 🥰❤️
@RDeanOdell
9 ай бұрын
Thanks so much! I appreciate the support.
@asfhak7152
7 ай бұрын
You may consider another one known as Palani kailash for basics only
@user-sm6td8hv8d6 ай бұрын
The best instructor, thank you for sharing your knowledge to the world.💯❤
@prajaktajoshi18852 жыл бұрын
Great Explaination heard on GD&T so far!!
@RDeanOdell
2 жыл бұрын
Thanks so much!
@DennisAlvey2 жыл бұрын
I got thrown into teaching a Blueprint reading class and your videos have help me greatly!!!
@RDeanOdell
2 жыл бұрын
Hi, thanks! Where do you teach?
@DennisAlvey
2 жыл бұрын
@@RDeanOdell Hopkinsville Community College in KY
@jodee23112 жыл бұрын
Thank you for the awesome videos. Saved me a lot time reading the 300pg book.
@richardstevenson371 Жыл бұрын
I was reading the ASQ Certified Quality Engineer book and couldn't make heads or tails of MMC. You made it perfectly clear. Thank you!
@RDeanOdell
Жыл бұрын
Great to hear! Thanks so much!
@evahoney4976 Жыл бұрын
Thank you soooo much for making the videos. Watch them all. Learned a lot.
@RDeanOdell
Жыл бұрын
Thanks so much!
@devanconey4107 Жыл бұрын
Thank you for going with this approach to explaining things. I wish I could have you as one of my instructors. Up to this point, I've had struggles with understanding GD&T in my Print Interpretation class. I'm pursuing a CNC Production Machinist Technical Certificate. I'm glad I found your channel and I have better confidence with the concept of GD&T. Again thank you
@crj56314 ай бұрын
Thank you so much for publishing this series
@RDeanOdell
4 ай бұрын
Thanks!
@devanconey4107 Жыл бұрын
Your explanation over the feature control frame has helped me understand the concept so much better now. Glad I was able to find you before I started my GD&T class this semester.
@RDeanOdell
Жыл бұрын
Thanks so much! Glad my video was helpful in your studies.
@alfaradbean2 ай бұрын
Helpful tips in my work as a drawing reviewer at Saab, fine that you explain differences to ISO
@RDeanOdell
2 ай бұрын
Glad it was helpful!
@aznninja17 Жыл бұрын
Love this channel. THANK YOU!!!!
@RDeanOdell
Жыл бұрын
Thanks so much! I appreciate the comment.
@lelouchparanoid Жыл бұрын
Very helpful for someone looking for free resources to learn GDNT. Thank you!
@RDeanOdell
Жыл бұрын
Great to hear! Thanks so much.
@devendietrich3445 Жыл бұрын
Sometimes I'll watch these videos and try to like them and realize my past self has already done so.
@1907spartacuss Жыл бұрын
You are really a great GD&T teacher !! Many thanks for your efforts..
@RDeanOdell
Жыл бұрын
Many thanks!
@joelvaldovinos1035 Жыл бұрын
Best explanation… help me a lot… thanks…
@RDeanOdell
Жыл бұрын
High praise! Thanks so much! I’m thrilled my video was helpful.
@ronconovoa75663 ай бұрын
this a great informatic video well done
@justinvu5840 Жыл бұрын
This video was extremely helpful. Thank you so much!
@RDeanOdell
Жыл бұрын
You’re very welcome! Thanks for the support.
@user-lk5hm2mc1r6 ай бұрын
What a beautiful english, really understandable.
@DurgaPrasad-qm4xi2 жыл бұрын
Good video for engineers, I got lot of information from u sir, thanks for ur videos
@RDeanOdell
2 жыл бұрын
Great to hear!
@nabarajgairhe6152 Жыл бұрын
Thank you for the tutorial.
@RDeanOdell
Жыл бұрын
You are very welcome! Thanks for watching.
@YM-gb7sn Жыл бұрын
Great overview! Very well explained.
@RDeanOdell
Жыл бұрын
Thanks so much!
@jonnyjohn2321 Жыл бұрын
I’m doing GD+T in class now, this is better than the textbooks and instructors combined
@RDeanOdell
Жыл бұрын
Thanks so much!
@brandonthesteele10 ай бұрын
An intuitive way to think of the difference between MMC and LMC is to think of the part as a balloon filled with air. MMC is the over-inflated condition and LMC is the under-inflated condition.
@RDeanOdell
10 ай бұрын
Thanks for the example!
@xtra-air Жыл бұрын
Nice! Thanks Dean, very well explained.
@RDeanOdell
Жыл бұрын
Thanks so much!
@naan8690 Жыл бұрын
Awesome
@jafo3814Ай бұрын
Thanks for the video. I subscribed and plan on viewing all the videos in the playlist that you created. In your video, you had mentioned MMB and LMB for Datums: 1. Do they have anything to do with Datum Shift? 2. How to calculate Datum Shift? 3. What are some applications for their use?
@vigneshradhakrishnan4503 Жыл бұрын
Great Explanation Professor. Is it possible to make a video on inspecting the position tolerance of the washer explained in 19:44 with datum A and B at RMB. Or even explain how will we use gauges in calculating the deviation.
@ManishGupta-gv4kk Жыл бұрын
That was greatly explained
@rui2565 Жыл бұрын
👏👏👏👏
@paulcremin79052 жыл бұрын
Hi Dean, great content as always. Would I be correct in saying that for the drawing produced at 22:47, there is nothing controlling the tolerance of the 2.00 dimension until you add the profile tolerance at 23:20? In other words, is the drawing incomplete or "incorrect" until the profile characteristic and tolerance is added since there is no feature control frame associated with the basic dimension 2.00?
@RDeanOdell
2 жыл бұрын
Hi, thanks so much! You are correct! According to Fundamental Rule “A” ( I made a video about it last year ). Every dimension must have a tolerance. As you pointed out, that surface dimensioned with a basic dimension does not have any associated feature control frames. This would make the specification incomplete. Adding a profile would be the best course of action in most situations.
@songyijia9453 Жыл бұрын
I love this video. it helps me a lot. thank you.
@RDeanOdell
Жыл бұрын
Thanks so much! Glad you found it helpful.
@jermainebailey3929 Жыл бұрын
Great video needed to have a great review
@RDeanOdell
Жыл бұрын
Thanks! 👍
@paulhernandez112 Жыл бұрын
This is the first video I was presented when trying to learn about GD&T, and im impressed about how good you are at teaching. I thank life and the algorithms for letting me learn from you! Greetings from Mexico!
@levifrizzell2162 Жыл бұрын
You are an amazing teacher very impressed with video
@RDeanOdell
Жыл бұрын
Thanks so much!
@KelvinChannel2 жыл бұрын
Thanks!! Great explanations!! Your videos are very helpful
@RDeanOdell
2 жыл бұрын
Thanks so much! Glad to hear you find my videos useful.
@Marty_P10 ай бұрын
Thank you Sir.
@peterdavila30452 жыл бұрын
Great video Dean. The only part that was a little confusing is that you seemed to be drawing the Right Hand View for parts to the left of the front view in your samples. So that when you had a datum reference it seemed to be picking up the opposite intended surface? See for example your Views at 19:33 in your video.
@AnhNguyen-qz4bq2 жыл бұрын
Thank you very much for the video 🙏
@RDeanOdell
2 жыл бұрын
You are so welcome! Thanks for watching.
@izzatismail-hy3ex Жыл бұрын
Good and clear
@RDeanOdell
Жыл бұрын
Thanks!
@pesisetna1300 Жыл бұрын
Very helpful thank you
@RDeanOdell
Жыл бұрын
Thanks so much!
@charlyxavier15999 ай бұрын
Hi Dean, thanks for the video. I'm little confused about LMC. How the tolerance increases when the dimension move from LMC to MMC. When the pin gets bigger there will be less space to move around and thus less tolerance right. Please correct me if I'm wrong.
@ariel59864470 Жыл бұрын
excellent :)
@donlahey17342 жыл бұрын
Awesome content! I have to work with both Imperial and metric tolerances for the automotive industry. I may be able to show you a real world fixture for the concepts you are illustrating in the round for measuring tolerances.
@RDeanOdell
2 жыл бұрын
Thanks so much! I’d be thrilled to see some “real” industry examples. I can be reached by email at dean@deanodell.com
@ginotacobell3098 Жыл бұрын
Thanks for your teaching video Mr. Odell. Would you make video to show 1/ how to lock a slot if it's 3rd datum and 2/ how to inspect its true position if it's called out its width and its length separately. THANKS.
@corysmith54222 жыл бұрын
Excellent
@RDeanOdell
2 жыл бұрын
Thank you!
@francischan8263 Жыл бұрын
Question regarding the MMC and LMC pin example at 18:00: 1. For MMC pin example, does machinist tends to machine the pin to the lower end (0.98, 0.99) to give themselves more room for error (shaft deflection from lathing etc...) in straightness? 2. For LMC pin example, what is the practical application?
@klamar1912 жыл бұрын
23:20 min 2xholes of diameters 1" seems to not fit to part of 2" length isn't?
@RDeanOdell
2 жыл бұрын
Hi, you are probably correct. I am just making up dimensions to illustrate the concept.
@godspeed11482 жыл бұрын
So...if we are considering a thru hole in a block...at mmc the hole will be smaller with limited tolerance to its axis(considering position gtol)....and if the hole is.larger then the hole axis can bend or have more.slantness?
@RDeanOdell
2 жыл бұрын
Basically, yes. If the hole is toleranced with position and the MMC symbol is present, the hole gets more position tolerance if it is made a larger size within the size tolerance. The additional position tolerance is called “bonus tolerance” although this phrase is not in ASME Y14.5. The bonus tolerance is the difference between the actual size of the unrelated actual mating envelope and the MMC size. This can be added to the specified position tolerance and is known as the “allowable” tolerance. The axis is always straight, but can exist at any orientation or location within the tolerance zone.
@rafirahman12282 жыл бұрын
Hi Dean, Your contents are very informative and helpful to learning GD&T for fresher engineers like me. Thank you for this initiative. I have a question actually for you. Let's say datum B (That you have shown in your video 10:25 ) is the main mating surface in case of an assembly, but you have said to consider the largest surface in case of choosing the datum A. So my question is should we consider just like you in this case or there is an exception?
@saikumargollapalli17902 жыл бұрын
We want to see more videos from you on latest updates and changes in gd & t standards
@RDeanOdell
2 жыл бұрын
Thanks for the feedback! Let me see what I can do about comparing the 2018 to 2008 standard In a video.
@saikumargollapalli1790
2 жыл бұрын
@@RDeanOdell can you please do a series of videos on latest gd&t standard Since I m into design engineering of aerospace it will be helpful for me
@ivanaristover11 ай бұрын
Thank you for your great educational videos on GD&T. A couple of questions: There is a confusing note under feature control frame on the drawing at 19:30 . It says "MMC=VC=1.98". The hole feature size is only 1.00 +/-.02 shouldn't it be 0.98 at MMC? Also, does departure from MMB/LMB when used on datum in feature control frame affects other tolerances of feature size or geometric tolerance?
@asfhak7152
7 ай бұрын
In this figure the smaller hole is an internal FOS, and you should know that for hole the MMC size is the smallest size of dia which is 1.98 and there is no geometrical tolerance are given for MMC ,that is why VC=1.98
@nathanmeyer4371 Жыл бұрын
Couldn't the cut discussed around 15:00 be measured using the depth gauge and therefore a feature of size?
@RDeanOdell
Жыл бұрын
Hi. It sure could be measured that way! The idea with the feature of size definition in the ASME standard is that you need opposing points, while the depth gage is measuring in the same direction. This isn’t a law of nature or anything, so your instinct is not wrong. The ISO standard allows some different concepts like position on surfaces where the ASME standard says that is against the “rules”.
@eat.nwatch8939 Жыл бұрын
Hello professor, thank you for the explinations, please what do you mean by : - basic dimensions terminate of 30 thousandths ? - position is almost applied with the directly tolerance dimension that applied to a feature of size in 8:27 - this surface is parallel to 5 thousands in 5:53 and why you said for datums it can be A C B, then it should be A, B, the C ?
@yashuyashu90511 ай бұрын
Thank from INDIA 🇮🇳
@RDeanOdell
11 ай бұрын
You’re welcome!
@manniples10 ай бұрын
At 16:00 does it mean if the diameter symbol is missing the tolerance applies as a circle instead of a cylinder?
@chandancs_shetty Жыл бұрын
I think mmc is for pins and shafts,and LMC is for hole is it right
@murffly Жыл бұрын
@18:00 How could additional tolerance be gained by moving closer to MMC from LMC? If your alignment pin is getting larger or hole is getting smaller, by default you are losing positional tolerance for those features. In what type of situation would you actually be gaining tolerance like stated in the LMC description?
@asfhak7152
7 ай бұрын
0.06
@oguzkirez39442 жыл бұрын
Let's say we have a position tolerance exactly the same as given in time 8:00. What would be the situation if we defined datums as only B and C (cancelled datum A restriction)?
@RDeanOdell
2 жыл бұрын
Great question! Without datum A, the axis would have no perpendicularity requirements. So the hole could be at an extreme angle and still pass a position check on one side of the part or the other.
@oguzkirez3944
2 жыл бұрын
@@RDeanOdell Thank you for the response. Your videos are so helpful. So, if we cancel A, we inspect the hole at just one circle in terms of the position according to B and C, one of the two sides of the part, right? And if we include datum A, we inspect it throughout the hole.
@raghavendrapalekar67394 ай бұрын
Hello can you please make one video of tolrence stack case considering FCF in it so to detail understand
@Ejeby Жыл бұрын
6:00 feature control frames
@RDeanOdell
Жыл бұрын
I probably should add the time stamps to the description. Thanks for adding this!
@JoeKSUCA Жыл бұрын
Conceptually MMC and LMC are still difficult to wrap my head around. Maybe because I don't understand yet when I would use it or not.
@ivancastro3655 ай бұрын
What's up with the "thousandths," like when you say "forty thousandths," but use 1.04. Isn't that forty hundredths?
@Equalrights4evrybdy Жыл бұрын
Why would you ever use LMC for creating varing tolerances? What would that look like and why would somebody try to achieve with that?
@ragingphoinix9144
18 күн бұрын
For bores for like sleeves, certain pumps, pin holes, etc.
@GerardoElJerry101 Жыл бұрын
Is there a course for this or is this an OJT thing?
@duelbuster12311 ай бұрын
I graduated electrical engineering trying to get a job in mechanical industry i almost get this vid😅 but not 100% lol
@denniskingsland2827 Жыл бұрын
I have to disagree about not reporting Basic dimensions unless you are in a strict pass/ fail situation. In the shop, the machinist nearly always wants to know where the center of the hole is, especially if the feature is out of tolerance.. Reporting .01 position can mean many different things, especially if you have multiple holes in a pattern. Having all the holes in a pattern drift towards 2:00 o'clock is a very different thing than having the holes moving randomly. If the holes are drifting about the same amount and in the same direction then that is very likely a setup issue. If the holes are moving randomly then something may be loose in the setup. I do like your videos and wish I had something like them back in the dark ages when I was first learning this stuff.
@RDeanOdell
Жыл бұрын
Hi, thanks for the great feedback. I understand your disagreement completely. I think this is always going to be a sticking point between manufacturing and inspection. My view on the design and inspection side is that drawing requirements are pass/fail. No room for interpretation *if* the drawing is prepared correctly. I hope most companies have a feedback mechanism where inspection can include important data on actual locations from basic dimensions so that manufacturing can fix errors.
@DeanWatts-yz1ng
5 ай бұрын
ASME Y14.45-2021, titled "Measurement Data Reporting" has a solution for this issue. For position tolerance data, Y14.45 specifies that "Location components" are a standard item that can be (should be in most cases) included along with a position value. Location components are the X, or Y, or Z locations of, for instance, each end point of the axis of a hole. If the position tolerance is applied to a center plane of a slot or tab then only one location component may be needed. If the position tolerance is applied to an axis of a shaft or bore then two directions of location components, possibly at each axis end point (if the feature has enough length/depth to make this practical) are needed. If the position tolerance applies to the center point of a sphere, then three location components, X, Y, and Z will be needed. As you may already be thinking, if X, Y and Z location components are to be reported, then an explicit set of coordinate axes that represent the applicable datum reference frame must be shown on the drawing or model when location component reporting is desired. There are several conceptual and practical reasons why basic dimension cannot be reported (it's more than just that they should not be reported), but location components, relative to an explicit set of datum reference frame coordinate axes provide a good way to provide clear data the shows where the feature is. A similar type of additional data that clarifies data reporting for profile tolerances is also specified in Y14.45-2021. "Surface deviation" values for each measured point, or a sampling of measured points can be reported along with the profile value.
@Waferdicing Жыл бұрын
❤️💙💚🤎
@billybailey713 Жыл бұрын
on your last example, you have dia.03 in the feature control box. how does this relate to the part holes' size tolerances? it would still be MMC 0.98size + .06 to get back to 1.04, correct?
@elcidcampeador9629 Жыл бұрын
Your teaching is great, but your haircut is not appropriate to your manhood
@twistytriangle Жыл бұрын
@RDeanOdellHVCC Thanks for all the video explanations you have put up! Really helpful! Can you answer this: if the part comes in at exactly at Upper Spec Limit (USL) 1.02 and MMC is not applied, then 1.Form tolerance applied will become zero zero, or 2.Will it be 1.02 USL + 0.02 form tolerance
Пікірлер: 164
I stopped watching after 34 seconds when he did not identify an axis as a possible datum. ASME Y14.5-09, 1.3.13 Datum : a theoretically exact point, axis, line, plane, or combination thereof derived from the theoretical datum feature simulator.
@goodsamaritan3991
2 ай бұрын
I don't think your statement is fair. (1) This is Lesson 1. (2) An axis is a type of line. (3) Mr. Odell is trying to communicate a general concept. Teaching is an art. I really appreciate the way Mr. Odell is teaching. Quoting "the law" directly from ASME Y14.5 (like you have suggested) when one is just starting out in one's GD&T journey may not be the wise thing to do from a pedagogical point of view. (4) Mr. Odell, please proceed.
@MarkSummersCAD
2 ай бұрын
If you quit listening at 34 seconds, it is your loss. Great intro video.IMHO. When I teach GD&T in my ENGR 1304 class, if I can get students to understand these four concepts, I feel I have done a good job.
@phanders88
Ай бұрын
OH MY GOD NOOOOOOOOO!
@wyattb3138
21 күн бұрын
This video series got me a good design internship and it’s great to review.
I trust this man based on the amount of pens and pencils in his breast pocket.
@SoSaysYou
7 ай бұрын
I trust the pony tail. My college drafting instructor also had a ponytail.
Im about a year along my 3d printing hobby and didnt really need this stuff. As Ive been diving more into design,I found myself here and Im hooked. This is just the nerd food my brain needs. all jokes aside I learned a lot, probably need to watch the video a few more times but the instructions are clear even if they are a bit over my head for now. Kind of shocked this video only has 133k views.
By a far the best GD&T instructional I have found on YT. Mr. Odell you rule!
@RDeanOdell
Жыл бұрын
Thank you so much!
@liangqifeng25
8 ай бұрын
I second
@Chrisdschannel3218
3 ай бұрын
Listening to this at work so I can build more skills and get a better, higher paying job. Thank you!
this guy is the greatest GD&T instructor in the world. much love
Dean, I come to say thanks to you. I just passed the GDTP Senior and certified in the 2009 version. Appreciate your generous videos, these really help me lot. I come from China where the KZread is forbidden, anyway I come to share you the good news. And best wished to you! You are the man!
I'm studying GD&T as fast as I can to prepare for new job position. Going from civil engineering to mechanical engineering. This is very helpful! Thank you for sharing these videos.
@sophiapappa849
20 күн бұрын
Hi! I am currently trying to do the same. Did anything else help you with this transition and interview process?
@TylerDaSilva522
19 күн бұрын
@@sophiapappa849 All the jobs I saw were pretty hyper specific. You need to narrow down what you're looking for and then study what they list in their job description.
Been looking for content like this on youtube for a long time. Simply and thoroughly explained with great examples. Thanks Dean!
@RDeanOdell
Жыл бұрын
That’s why I made it! I remember years ago looking for good GD&T content for myself on KZread and not being able to find anything useful. I’ve tried to provide the best I can with the tools I have.
You’re doing gods work, this level of teaching is worth so much
@RDeanOdell
Жыл бұрын
Thanks!
You are an excellent teacher and thank you so much for your service!
Yessssir. Machinist here, reviewing things. Excellent info. Clean, straightforward. Thank you very much, Dean!
3:34 That is absolutely 💯 correct. Datums whether it could be ABC or XYZ or 321 are basically an absolute common ground or a foundation or a reference where a designer, manufacturer and quality inspector come together to speak of & understand the same concept without leading them to any incorrect interpretation.
I’ve been looking through all the other GD&T KZread material for my work and they are not explained like this, fantastic video!
@RDeanOdell
Жыл бұрын
Great to hear! Thanks so much.
This gotta be the most informative video about GD&T out in the internet .
@RDeanOdell
Жыл бұрын
Thanks so much! It’s actually an hour long lecture in person, but I fast-forward and edit parts so that it comes out to about 25 minutes for KZread.
Man, your explanation is so good that even I, a Brazilian who doesn't understand English that well, managed to learn it! Thanks!!!
@RDeanOdell
Жыл бұрын
Great to hear! That’s great you can follow! I try to use clear language and limit the technical jargon whenever possible.
@willmermauriciobarreraliza2304
11 ай бұрын
@@RDeanOdell I don't native english speaker and thank you a lot, you spoke clear and a perfect speed.
Just found these videos. They are awesome! Just what I needed.
@RDeanOdell
Жыл бұрын
Thanks so much! I have several videos in this series, as well as many shorter videos covering various GD&T topics.
He is the best GD&T Instructor of GD&T I have ever seen!
@RDeanOdell
Жыл бұрын
Thanks so much for the support!
I am impressed with the value of information that has been delivered in the video. Kudos to you @R. Dean Odell.
@RDeanOdell
2 ай бұрын
Thanks! There are 7 more videos in this series as well.
I'm glad that I found this channel! Thank you for sharing this with us!
@RDeanOdell
Жыл бұрын
Great to hear! I have lots more videos on the topic
This is simply outstanding! As an EE, I’ve dreaded learning this, but this is so practical and explained so clearly, I wish I started sooner! I really lucked out finding this channel.
@RDeanOdell
5 ай бұрын
Glad it was helpful! Lots more videos as well.
Dean, wow this "Straight to the Point" is so beautiful and is so easy to understand. Thank you for this powerful easy to see approach. I will look out for more of your videos
@RDeanOdell
2 жыл бұрын
Awesome to hear! Glad you found it helpful. I use this lecture as an introduction to GD&T in my courses on print reading.
i learned more here than at the 4 hour "training" session as my workplace... thanks!
@RDeanOdell
Ай бұрын
I’ve been through those too, let me guess, they used PowerPoint?
Dean Odell, thank you for your post. I appreciate what your doing. The Gd&t Subject can be a little dry for many engineers and designers. I like how you add your own twist to the subject and make more interesting.
@RDeanOdell
Жыл бұрын
Thanks so much! I try to explain things in my own way, and not just read off what is in a book. Sometimes I make mistakes, but I think explaining is more important than presenting information.
excellent, GD&T was a mystery to me before watching this, thanks very much
I have seen so many videos on KZread. But this man has touched my heart for his teaching style 🥰❤️
@RDeanOdell
9 ай бұрын
Thanks so much! I appreciate the support.
@asfhak7152
7 ай бұрын
You may consider another one known as Palani kailash for basics only
The best instructor, thank you for sharing your knowledge to the world.💯❤
Great Explaination heard on GD&T so far!!
@RDeanOdell
2 жыл бұрын
Thanks so much!
I got thrown into teaching a Blueprint reading class and your videos have help me greatly!!!
@RDeanOdell
2 жыл бұрын
Hi, thanks! Where do you teach?
@DennisAlvey
2 жыл бұрын
@@RDeanOdell Hopkinsville Community College in KY
Thank you for the awesome videos. Saved me a lot time reading the 300pg book.
I was reading the ASQ Certified Quality Engineer book and couldn't make heads or tails of MMC. You made it perfectly clear. Thank you!
@RDeanOdell
Жыл бұрын
Great to hear! Thanks so much!
Thank you soooo much for making the videos. Watch them all. Learned a lot.
@RDeanOdell
Жыл бұрын
Thanks so much!
Thank you for going with this approach to explaining things. I wish I could have you as one of my instructors. Up to this point, I've had struggles with understanding GD&T in my Print Interpretation class. I'm pursuing a CNC Production Machinist Technical Certificate. I'm glad I found your channel and I have better confidence with the concept of GD&T. Again thank you
Thank you so much for publishing this series
@RDeanOdell
4 ай бұрын
Thanks!
Your explanation over the feature control frame has helped me understand the concept so much better now. Glad I was able to find you before I started my GD&T class this semester.
@RDeanOdell
Жыл бұрын
Thanks so much! Glad my video was helpful in your studies.
Helpful tips in my work as a drawing reviewer at Saab, fine that you explain differences to ISO
@RDeanOdell
2 ай бұрын
Glad it was helpful!
Love this channel. THANK YOU!!!!
@RDeanOdell
Жыл бұрын
Thanks so much! I appreciate the comment.
Very helpful for someone looking for free resources to learn GDNT. Thank you!
@RDeanOdell
Жыл бұрын
Great to hear! Thanks so much.
Sometimes I'll watch these videos and try to like them and realize my past self has already done so.
You are really a great GD&T teacher !! Many thanks for your efforts..
@RDeanOdell
Жыл бұрын
Many thanks!
Best explanation… help me a lot… thanks…
@RDeanOdell
Жыл бұрын
High praise! Thanks so much! I’m thrilled my video was helpful.
this a great informatic video well done
This video was extremely helpful. Thank you so much!
@RDeanOdell
Жыл бұрын
You’re very welcome! Thanks for the support.
What a beautiful english, really understandable.
Good video for engineers, I got lot of information from u sir, thanks for ur videos
@RDeanOdell
2 жыл бұрын
Great to hear!
Thank you for the tutorial.
@RDeanOdell
Жыл бұрын
You are very welcome! Thanks for watching.
Great overview! Very well explained.
@RDeanOdell
Жыл бұрын
Thanks so much!
I’m doing GD+T in class now, this is better than the textbooks and instructors combined
@RDeanOdell
Жыл бұрын
Thanks so much!
An intuitive way to think of the difference between MMC and LMC is to think of the part as a balloon filled with air. MMC is the over-inflated condition and LMC is the under-inflated condition.
@RDeanOdell
10 ай бұрын
Thanks for the example!
Nice! Thanks Dean, very well explained.
@RDeanOdell
Жыл бұрын
Thanks so much!
Awesome
Thanks for the video. I subscribed and plan on viewing all the videos in the playlist that you created. In your video, you had mentioned MMB and LMB for Datums: 1. Do they have anything to do with Datum Shift? 2. How to calculate Datum Shift? 3. What are some applications for their use?
Great Explanation Professor. Is it possible to make a video on inspecting the position tolerance of the washer explained in 19:44 with datum A and B at RMB. Or even explain how will we use gauges in calculating the deviation.
That was greatly explained
👏👏👏👏
Hi Dean, great content as always. Would I be correct in saying that for the drawing produced at 22:47, there is nothing controlling the tolerance of the 2.00 dimension until you add the profile tolerance at 23:20? In other words, is the drawing incomplete or "incorrect" until the profile characteristic and tolerance is added since there is no feature control frame associated with the basic dimension 2.00?
@RDeanOdell
2 жыл бұрын
Hi, thanks so much! You are correct! According to Fundamental Rule “A” ( I made a video about it last year ). Every dimension must have a tolerance. As you pointed out, that surface dimensioned with a basic dimension does not have any associated feature control frames. This would make the specification incomplete. Adding a profile would be the best course of action in most situations.
I love this video. it helps me a lot. thank you.
@RDeanOdell
Жыл бұрын
Thanks so much! Glad you found it helpful.
Great video needed to have a great review
@RDeanOdell
Жыл бұрын
Thanks! 👍
This is the first video I was presented when trying to learn about GD&T, and im impressed about how good you are at teaching. I thank life and the algorithms for letting me learn from you! Greetings from Mexico!
You are an amazing teacher very impressed with video
@RDeanOdell
Жыл бұрын
Thanks so much!
Thanks!! Great explanations!! Your videos are very helpful
@RDeanOdell
2 жыл бұрын
Thanks so much! Glad to hear you find my videos useful.
Thank you Sir.
Great video Dean. The only part that was a little confusing is that you seemed to be drawing the Right Hand View for parts to the left of the front view in your samples. So that when you had a datum reference it seemed to be picking up the opposite intended surface? See for example your Views at 19:33 in your video.
Thank you very much for the video 🙏
@RDeanOdell
2 жыл бұрын
You are so welcome! Thanks for watching.
Good and clear
@RDeanOdell
Жыл бұрын
Thanks!
Very helpful thank you
@RDeanOdell
Жыл бұрын
Thanks so much!
Hi Dean, thanks for the video. I'm little confused about LMC. How the tolerance increases when the dimension move from LMC to MMC. When the pin gets bigger there will be less space to move around and thus less tolerance right. Please correct me if I'm wrong.
excellent :)
Awesome content! I have to work with both Imperial and metric tolerances for the automotive industry. I may be able to show you a real world fixture for the concepts you are illustrating in the round for measuring tolerances.
@RDeanOdell
2 жыл бұрын
Thanks so much! I’d be thrilled to see some “real” industry examples. I can be reached by email at dean@deanodell.com
Thanks for your teaching video Mr. Odell. Would you make video to show 1/ how to lock a slot if it's 3rd datum and 2/ how to inspect its true position if it's called out its width and its length separately. THANKS.
Excellent
@RDeanOdell
2 жыл бұрын
Thank you!
Question regarding the MMC and LMC pin example at 18:00: 1. For MMC pin example, does machinist tends to machine the pin to the lower end (0.98, 0.99) to give themselves more room for error (shaft deflection from lathing etc...) in straightness? 2. For LMC pin example, what is the practical application?
23:20 min 2xholes of diameters 1" seems to not fit to part of 2" length isn't?
@RDeanOdell
2 жыл бұрын
Hi, you are probably correct. I am just making up dimensions to illustrate the concept.
So...if we are considering a thru hole in a block...at mmc the hole will be smaller with limited tolerance to its axis(considering position gtol)....and if the hole is.larger then the hole axis can bend or have more.slantness?
@RDeanOdell
2 жыл бұрын
Basically, yes. If the hole is toleranced with position and the MMC symbol is present, the hole gets more position tolerance if it is made a larger size within the size tolerance. The additional position tolerance is called “bonus tolerance” although this phrase is not in ASME Y14.5. The bonus tolerance is the difference between the actual size of the unrelated actual mating envelope and the MMC size. This can be added to the specified position tolerance and is known as the “allowable” tolerance. The axis is always straight, but can exist at any orientation or location within the tolerance zone.
Hi Dean, Your contents are very informative and helpful to learning GD&T for fresher engineers like me. Thank you for this initiative. I have a question actually for you. Let's say datum B (That you have shown in your video 10:25 ) is the main mating surface in case of an assembly, but you have said to consider the largest surface in case of choosing the datum A. So my question is should we consider just like you in this case or there is an exception?
We want to see more videos from you on latest updates and changes in gd & t standards
@RDeanOdell
2 жыл бұрын
Thanks for the feedback! Let me see what I can do about comparing the 2018 to 2008 standard In a video.
@saikumargollapalli1790
2 жыл бұрын
@@RDeanOdell can you please do a series of videos on latest gd&t standard Since I m into design engineering of aerospace it will be helpful for me
Thank you for your great educational videos on GD&T. A couple of questions: There is a confusing note under feature control frame on the drawing at 19:30 . It says "MMC=VC=1.98". The hole feature size is only 1.00 +/-.02 shouldn't it be 0.98 at MMC? Also, does departure from MMB/LMB when used on datum in feature control frame affects other tolerances of feature size or geometric tolerance?
@asfhak7152
7 ай бұрын
In this figure the smaller hole is an internal FOS, and you should know that for hole the MMC size is the smallest size of dia which is 1.98 and there is no geometrical tolerance are given for MMC ,that is why VC=1.98
Couldn't the cut discussed around 15:00 be measured using the depth gauge and therefore a feature of size?
@RDeanOdell
Жыл бұрын
Hi. It sure could be measured that way! The idea with the feature of size definition in the ASME standard is that you need opposing points, while the depth gage is measuring in the same direction. This isn’t a law of nature or anything, so your instinct is not wrong. The ISO standard allows some different concepts like position on surfaces where the ASME standard says that is against the “rules”.
Hello professor, thank you for the explinations, please what do you mean by : - basic dimensions terminate of 30 thousandths ? - position is almost applied with the directly tolerance dimension that applied to a feature of size in 8:27 - this surface is parallel to 5 thousands in 5:53 and why you said for datums it can be A C B, then it should be A, B, the C ?
Thank from INDIA 🇮🇳
@RDeanOdell
11 ай бұрын
You’re welcome!
At 16:00 does it mean if the diameter symbol is missing the tolerance applies as a circle instead of a cylinder?
I think mmc is for pins and shafts,and LMC is for hole is it right
@18:00 How could additional tolerance be gained by moving closer to MMC from LMC? If your alignment pin is getting larger or hole is getting smaller, by default you are losing positional tolerance for those features. In what type of situation would you actually be gaining tolerance like stated in the LMC description?
@asfhak7152
7 ай бұрын
0.06
Let's say we have a position tolerance exactly the same as given in time 8:00. What would be the situation if we defined datums as only B and C (cancelled datum A restriction)?
@RDeanOdell
2 жыл бұрын
Great question! Without datum A, the axis would have no perpendicularity requirements. So the hole could be at an extreme angle and still pass a position check on one side of the part or the other.
@oguzkirez3944
2 жыл бұрын
@@RDeanOdell Thank you for the response. Your videos are so helpful. So, if we cancel A, we inspect the hole at just one circle in terms of the position according to B and C, one of the two sides of the part, right? And if we include datum A, we inspect it throughout the hole.
Hello can you please make one video of tolrence stack case considering FCF in it so to detail understand
6:00 feature control frames
@RDeanOdell
Жыл бұрын
I probably should add the time stamps to the description. Thanks for adding this!
Conceptually MMC and LMC are still difficult to wrap my head around. Maybe because I don't understand yet when I would use it or not.
What's up with the "thousandths," like when you say "forty thousandths," but use 1.04. Isn't that forty hundredths?
Why would you ever use LMC for creating varing tolerances? What would that look like and why would somebody try to achieve with that?
@ragingphoinix9144
18 күн бұрын
For bores for like sleeves, certain pumps, pin holes, etc.
Is there a course for this or is this an OJT thing?
I graduated electrical engineering trying to get a job in mechanical industry i almost get this vid😅 but not 100% lol
I have to disagree about not reporting Basic dimensions unless you are in a strict pass/ fail situation. In the shop, the machinist nearly always wants to know where the center of the hole is, especially if the feature is out of tolerance.. Reporting .01 position can mean many different things, especially if you have multiple holes in a pattern. Having all the holes in a pattern drift towards 2:00 o'clock is a very different thing than having the holes moving randomly. If the holes are drifting about the same amount and in the same direction then that is very likely a setup issue. If the holes are moving randomly then something may be loose in the setup. I do like your videos and wish I had something like them back in the dark ages when I was first learning this stuff.
@RDeanOdell
Жыл бұрын
Hi, thanks for the great feedback. I understand your disagreement completely. I think this is always going to be a sticking point between manufacturing and inspection. My view on the design and inspection side is that drawing requirements are pass/fail. No room for interpretation *if* the drawing is prepared correctly. I hope most companies have a feedback mechanism where inspection can include important data on actual locations from basic dimensions so that manufacturing can fix errors.
@DeanWatts-yz1ng
5 ай бұрын
ASME Y14.45-2021, titled "Measurement Data Reporting" has a solution for this issue. For position tolerance data, Y14.45 specifies that "Location components" are a standard item that can be (should be in most cases) included along with a position value. Location components are the X, or Y, or Z locations of, for instance, each end point of the axis of a hole. If the position tolerance is applied to a center plane of a slot or tab then only one location component may be needed. If the position tolerance is applied to an axis of a shaft or bore then two directions of location components, possibly at each axis end point (if the feature has enough length/depth to make this practical) are needed. If the position tolerance applies to the center point of a sphere, then three location components, X, Y, and Z will be needed. As you may already be thinking, if X, Y and Z location components are to be reported, then an explicit set of coordinate axes that represent the applicable datum reference frame must be shown on the drawing or model when location component reporting is desired. There are several conceptual and practical reasons why basic dimension cannot be reported (it's more than just that they should not be reported), but location components, relative to an explicit set of datum reference frame coordinate axes provide a good way to provide clear data the shows where the feature is. A similar type of additional data that clarifies data reporting for profile tolerances is also specified in Y14.45-2021. "Surface deviation" values for each measured point, or a sampling of measured points can be reported along with the profile value.
❤️💙💚🤎
on your last example, you have dia.03 in the feature control box. how does this relate to the part holes' size tolerances? it would still be MMC 0.98size + .06 to get back to 1.04, correct?
Your teaching is great, but your haircut is not appropriate to your manhood
@RDeanOdellHVCC Thanks for all the video explanations you have put up! Really helpful! Can you answer this: if the part comes in at exactly at Upper Spec Limit (USL) 1.02 and MMC is not applied, then 1.Form tolerance applied will become zero zero, or 2.Will it be 1.02 USL + 0.02 form tolerance