How to Calculate Clearance Hole Diameter w/ GD&T Projected Tolerance Zone
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- Опубліковано 17 вер 2024
- Quickly understand how to calculate clearance hole diameters when using GD&T to control the position of the clearance holes and the position of the threaded holes in combination with Projected Tolerance Zone applied to the threaded features.
Link to Low Cost Drill Tolerances:
drive.google.c...
Fixed Fastener Case Study:
drive.google.c...
Here's a link to a screenshot of the whiteboard:
drive.google.c...
Instagram: @straighttothepointengineering
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This video was created to help beginners rapidly understand GD&T and quickly use the concepts in practical applications. Technical vocabulary was purposefully NOT used in an attempt to convey these topics to those who do NOT have a background in GD&T.
You are a machine mate, a great communicator and a great teacher...really nice. I can't say how much appreciated your lessons are. Straight to the point, love it!
FINALLY! SOMEONE WHO REALLY KNOWS HOW TO REDUCE SOMETHING TO ITS ESSENCE TO EXPLAIN IT. GREAT JOB!!!
Hi atlas108! Thank you for the uplifting and encouraging comment! I always try to explain things in a way which I wish it had been explained to me! Stay tuned and I hope to see you in the comments sections in the future! Stay safe and healthy!
thank you so much for your explanation.
thank you for emphasizing on giving the projected tolerance zone only to the threaded hole feature and not to the clearance hole feature.
Glad it was helpful!
Another excellent, clear presentation. I'm going to forward this and a few others by you to fellow engineer friends of mine, because we all get rusty - and nobody wants to dig out those old long-winded GD & T books! The multiple colors and cross-hatching used in the images on the whiteboard are very helpful, I would add. I agree with others here though that the sound level is just barely sufficient on this video, however. I had to rewind half a dozen times to catch everything and tie it to what you were pointing at on the board.
After watching this video, I am really waiting for more videos.Thank you so much for sharing such videos.
Hey there paresh wani, be on the lookout over the next few days. I will be uploading a new video with an updated, fresh format! Thank you for watching and for commenting! Have a fun week!
This is so easy to understand as he gets straight to the point. Everything is numbered and is followed as so. Thank you...
These are all excellent videos. Thank you for making an abstract subject easier to understand.
Thank you a lot for your lectures, that is really useful to know.
Also, I want to add some notes about P modification, in your cause yes it is entirely correct but actually, as I know also we can change this calculation by adding parameters of
screw straightness, according to screws standard, and if I'm right, your calculation of Hmin will change to Hmin = F +T1+T2+Ts , Ts means straitness of the screw according to iso, and in this case, you don't need to use P modificator.
Also will be very interesting to hear about the cause then these two parts connect between themselves by screws with a centering pin, or even with two centering pins or by a centering square element, that's also a very interesting cases in my opinion.
Thank you for your video a lot!
straight to the point so excellent. I'm a Mechanical engineering student and picked up Machinery's Handbook Guide recently. I will get the Handbook too. Any recommendations for other books?
WOW !!!! I will show these videos to Engneering department...We had several issues on GD&T or the production process was really bad.
Good Morning César Tovar! I hope the videos have some content in them which is helpful! Let me know if there is something you would like me to look at and provide some GD&T recommendations. Thanks for watching! Stay safe and healthy!
Make a separate video on applying datum method really need it. 😘😘😘😘
A good explanatory video.
HEY PLEASE DO MAKE SURE THAT ANY FUTURE VIDEOS YOU MAKE PLEASE DO COMBINE THE THEORETICAL & ACTUAL REAL WORLD APPLICATION RELATED TO ANY TOPICS YOU EXPLAIN, Like you explained in this video.
And once I have to say it's a great video.
Thanks man
Good explanation with details, thanks for this video., We are waiting for more videos like this..,
Hi there Mani Mech, thank you so much for watching and for the positive feedback! I work hard on the preparation and so it is nice to hear from you that the content is beneficial. BTW, I am about to post a new video with a brand new, fresh format so be on the lookout over the next few days! Again, thanks for watching and have a great week!
What are you doing nanba???
Another thing you should added tolerances for .. If a machine has a very plate .. Many machining machines won't have a bed that can chuck something up that is that long .. Some machining machines can hold parts from 4 to 6 feet in length .. There are machines that are bigger but they are very costly and their machine tolerances a much looser due in large part to the much larger chuck and bits that it can run .. In machines like those, there are tolerances per foot .. The first foot is more or less what you have listed on the board above .. As the length grows larger and larger the tolerances also grow .. If the machine programmer knows how to really do his / her job they will run the machine to a hole feature only in one direction even if they have to back the machine up a bit to run it to a feature .. Running the machine from the +X and +Y directions all the time will help minimize tolerance issues .. If you don't know your machine shop very well then go meet them and speak with them about your requirements .. I got this information directly from a machine shop in the mid west that had over 100 machines running .. Granted not many machine shop have this quantity of machines and the additional knowledge by having a very large farm of them ..
Some of the tightest tolerance machining machines I have encountered were Japanese and German .. It is important to know which machine they are using and obtaining a tolerance list for machining .. It is also a good idea to speak with the programmers .. Not all of them run their code the same way .. Reducing Machine time is what they all have a need to do .. We on the other hand need to make sure we always hit our 6 Sigma marks .. So their needs to be a happy medium ..
Excellent, really clear!
Amazing explanation. Thank you!
Very knowledgeable content, please cover whole GD&T and Tolerance stackup
Thank you so much! This was a great video
I like to thank you for your awesome videos
Excellent explanation , good job, keep it up.
On the BLUE part, what if this is a countersink hole instead of a through hole?
Countersink generally tends to self-center the bolt. If the countersink screw clears the edge of bore, utlimately the countersink will "correct" itself and move the centerline.
Please enlight me on this concept
Thanks,
Your videos are great,Thank you !!
Looks like top presentation, But audio volume is too low.
Hi Great Videos, Thank you. I see here you have T2= 0.014 in the other video you said you picked T1 to be 0.007 ( actually that video number opposite T1 was T2 and T2 was T1, ie threaded plate. but you had picked Looser tolerance on the threaded holes since it was hard to do than a holes. I would think if threaded holes were tighter it would mean the holes would be over then more often. But I guess since calculation adds up all it is all ok. Why did you not just make T1 & T2 the same in other video as you did here. Both being 0.014 -- Since calculation would cover them. Or just an example with no significance ? ? ? ? Thank you
There is one question arise. The formula chosen here is different. Could you please explain.
Thank you for your greate explanation. I want to know if there is any page I can find the tolerances for free running hole? in your case +0,07 and - 0,002
please make video on tolerance stack up analysis for assembly of parts
Perfect teacher
Excellent info.
Could you do a video on centering a circular plate on other plate using 2 pins..Basically I want to know how would we center two plates together using diametrically opposite pins ..and their tolerances.
Well done
Can you please cover differnece between COncentricity and Runout
Thanks for video btw...amazing explanation.
Good Morning Akash! Thank you for the kind comment and I hope you have a fun, relaxing Sunday!
can anyone tell what metric system he is using it's mm or it is in inches?
How to calculate the tolerant of +/- without drill reference?
OK, I hate to necro-comment an old post, but I don't get something here. You added the positional tolerances from both features, but since by definition the tolerances are the DIAMETER of the tolerance zone, shouldn't you have added HALF of each tolerance value? In your example, shouldn't it be .250 + .007+.007?
Dear sir your voice is not clear
I had the same question in my mind initially, but after thinking hard, I realised that diameter tolerance will be added as the hole clearance hole can be drilled on the extreme of the toelrance position diameter (let us assume extreme left and extreme right of the diametrical tolerance).
Question that I have is that why do we need to add positinal tolerance for both the plates? As the nominal positon hole on both the plates is same
thanks!
Thanks so much.
You have really nice videos, but can you please fix your audio.
Please improve the audio level..
stack-ups pleaseeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
Why do smart people forget simple things like volume?
Just a thought "No one uses #1/4-20's to fasten two 3/4" Plates together .. Practical real world fasting should be shown and discussed every time you do these videos .. Also Machine shop guys will tend to use larger bits to yield bonus tolerances which is not going to help your top plate to align with the bottom plate .. Top plate position is typically critical .. Is .039" offset tolerable in the top plate ? My answer would be NO .. If one plate is allowed to float, then there are no issues .. This isn't always going to be the case .. This should be mentioned in the video IMHO ..
Je conseille à l'auteur de faire le meme exemple avec les valeurs metr
iques
Voice is too low
Hi there Nikhil. I actually ordered and received a microphone in the mail yesterday. I will be using it to shoot my next video so hopefully the sound will improve! Thanks for watching and for adding value here in the comments section! Have a fun day!
These are all excellent videos. Thank you for making an abstract subject easier to understand.
Hey there Engi_Nerd! Thanks for the shout out here in the comments section. It can be a bit difficult to take something as non-intuitive as GD&T and present it in a bite-sized, easy to consume morsel but I am giving it a whirl! Thanks again for watching and have a fun weekend!
How to calculate the tolerant of +/- without drill reference?