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I understood the basic concept of a U-joint, but had no idea that the output speed wasn't constant. Very interesting. Thanks for the video!

Universal joint: I'm complicated Automatic transmission: Hold my planetary gearset

One thing that should be noted in the last example (double U joint): The input and output shaft have to be parallel for the velocity to remain constant.

this video turned a simple concept into a total mind fuck........thanks :D

"Now you understand how an universal joint works. Thank you." No. Thank YOU!! :oD

This has absolutely NOTHING to do with my education but I still watched the whole thing xP

Upping my Lego mindstorms game

You missed one very important point! The angle of the outputting universal joint must match the angle of the inputting joint. This problem was the source of some vibration concerns with some RWD vehicles and I have seen quite a few "Raise Kits" put on the rear suspensions of cars and trucks that did not take this into consideration. Some of those vehicles shook so violently they would loosen the fillings in your teeth! The concept of the constant velocity joint was used in the 60's and well into the 80's with what was called the "Cardigan Joint' and it had a very short piece of shaft at the front of a lot of driveshafts on GM RWD cars. A bit more complicated than this video showed, it served pretty well to eliminate vibrations caused by angle variations as long as the final output angle to the differential was under 1 degree.

Now I understand how offroad vehicles can flex so much, thank you!

This is simply brilliant. Really explains the non-constant velocity perfectly.

The video is exactly what I needed. He didnt just explain the parts and purpose of the U join, like most other videos, but he also talked about the physics

If you look at light-duty 4x4 trucks from decades ago (50s, 60s, and early 70s), the transfer case was tilted down toward the rear to reduce the angle of the U-joints in the rear drive shaft (the shaft with the greatest need for running efficiently), but this increased the angle of the U-joint on the front side of the transfer case. To accommodate that, they tilted the rear (input side) of the front axle downward. This rotation of the axle position away from the position that "looks right" increased the angle of the U-joint at that location so it was a close match to the steep angle of the U-joint at the front of the transfer case. It's a setup that looks very strange if you don't know the reason, and this video explains the reason.

Another superb explanation...You made Understanding Mechanical really easier.

Thank you, I had no idea about the fluctuation in speed etc, especially the last minute was very helpful!

Excellent video. This is why when reassembling a tail shaft, it is very important that the marks on the slip joint line up, so the angles on each end also match

This video has made a huge difference to my understanding of this joint! Along with helping me complete my course work, many thanks.

It seems like everybody is here because they were curious. Not because they actually needed to know. And I think that is great.

You've just make my understanding of the world more complicated.

Such an excellent video I have ever encountered with! It is explained with simple graphs and simple explanations, as well as supported with a simple video, I really enjoyed it, and I am so grateful :)

3:21 you may have outsmarted me but I outsmarted your outsmarted

INCREDIBLY interesting and informative!

what an amazing explanation. hope we can learn more things from you guys.

Thanks for the interactive animation and explanation !

Wonderful animation! Made the concept clear as day!

Nice video, especially after smokin some good universal joints 🤙

Awesome work. Please continue the job.

This is great, thank you for teaching me for free, you deserve more subscribers

keep it amazing man, your voice makes me know I'm about to get better

Your explanation were so clear. Awesome dude!!!

"Understanding Universal Joint": 82.230 views "Jen Selter makes squats": 129.655.342 views

Thanks so much for posting! This is a concept that I think very few professing professionals even have a clue!

Excellent video...thanks for sharing.

Thank you very much. Effort much appreciated.

Wow. Never thought that mathematical abstractions could solve mechanical challenges with such ease. Thanks for sharing.

I needed this video in my life.

I loved these videos. Thank you for this video uploader! 🤗

Now I have understood U-joint in a better way. Thank you for making such a video.

please keep thermal related videos....your animations are simply superb....

Dunno why this was in my feed, but, I'm impressed by it.

Wonderful! Thank you from Texas!

Great video!!! Congratulations, It now I can understand how a universal joint works

Awesome 👍👍 its so easy to understand. I'm glad i opened youtube to find out. And I'm logging without any other video 😁

Amazing animation with lovely explanation :)

Thank you for these videos. I, along with many other instructors have been tasked with converting what are normally lab activities to online lessons in a very short period of time. I certainly appreciate your site as a resource of accurate, clearly explained information.

Great job. I am a Uni joint manufacturer but never knew why do people use double joints.

Thanks that was well explained. Good work.

I didn't know, I didn't know how a universal joint worked. Lots of pennys dropped like why on cars its a different joint called a CV joint constant velocity. Why the yolks have to be lined up. And why the input and output shafts have to be parallel. OMG. Thank you sir and thank you youtube for the recommendation.

Many years ago they taught us this at school, when disassembly the shaft always mark the parts and spline with a file so they go back exactly the same, otherwise the Jerky Motion will ruin the drive shaft. Pretty obvious. I hope kids are still taught these basics mechanics

Great video. Learned something today. Thanks

Ooooooo my gosh ....... Never knew that the speed on the output shaft isn’t constant after changing the angle 🤷🏻‍♂️ Thanks a lot dear for uploading this informative video 😊

At 03:08, your graph shows a non-symmetrical addition and subtraction of the input speed. Not only are the positive and negative peak amplitudes of different magnitude, the area under each peak is also non-symmetrical. I would have thought that the velocity deviation should track the sine of the displacement angle, and that the positive and negative graph curve segments should be symmetrical.

I needed to figure out a way to transmit rotation to another axis without bevel gears and I had no idea how great universal joints were until this video. Thank you so much! You fucking rock!

Thank you. I am trying to build a Lego articulated suspension system with steering. You have helped me understand the universal joints.

I clearly understand about universal joint. Thank you

awesomely explained

Thanks so much for such an interesting vid!

excellent explanation!!!

Excellent information.

Thanks, this is amazing....

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Really awesome! Congratulation!

Thanks for the video! Really helpful :)

Great explanation!

Very informative and easy understanding

Very useful for my final exam, Thanks!

THANK YOU VERY MUCH! i feel much better having understood this

outstandable!!!!!!!!Thanks Learn Engineering

Thanks for your support

Thanks for amazing explanation

Don't know why I needed to know this but I now feel empowered.

My teacher always told us to use two for balance. I sorta imagined it was something like this but this is a nice video!

excellent explanation...thank you very much.......

this is f-ing amazing. Thank you

This video showed up randomly in my recommendations. No regrets at all :D

Very clear and interesting

I have always wondered how that works... omg thank you

In your channel all videos are good Fentastic animation

Hello, nice animations, can you tell us witch program did you use to make it? The animation is nice but to be able for a universal joint to create constant output you need to turn one of the joints 90 degrees relative to the other around the turning axle.

I've been searching for this for over a year and now finally I know how a fwd is able to steer while powering the wheels

very well explained

Awesome video

Loved this video. thanks

friggin awesome. i never really noticed that u joints have this kind of motion. think of the green dot moving back and forth on one edge of a triangle and the red dot moving on the hypotenuse of the same triangle (thats a fancy word for long side yall :) . since the red and green dots have to move those distances in the same amount of time... the green dot moves faster

As usual, I am always humbled by the efforts of our race.

Great lesson

This was amazing

Very clear explainantion!

concise and clear!

Great job.

Ur explanation is suprb

That was interesting, thank you

Why am i watching this at 2 am Either way, that was some good narration and good explanation, thank you

Wow!!!! Amazing

It is clear that this video helped me alot

nice.. helpful for theory of machines

Excellent video..

In one word : Great!

a parte de não ter velocidade constante foi bem explicada. vlw

Finally my curiosity has been answered, nice animation