The most amazing professor on youtube. Thank you for your great work,Sir.

I just met your channel, doing a weekend marathon on it! Congratulations for everything and keep up the great work!

Your lectures are very nice and clean . And I’m going to recommend your channel to all of my friends who want to learn this course. I think about 1:05:06 when you start to calculate Kts, as we know the only piece that can have a shoulder is the shaft. So between the “element on the shaft & shaft” there will be no fillet. by this I mean the only stress concentration may happed on the left side of the element on point D, and this concentration will happen on the shaft and so the D/d that we should use is 1/0.75 .(I mean there is no shoulder between the element on D and shaft, and the only shoulder is for the shaft at the point that its diameter changes). and also I think r/d should be 0.04/0.75. and for the right side of the element on point D we won’t have any stress concentration unless if we use retaining rings at that point which will cause stress concentration. I will be happy if you let me know your idea about this🙏🏻🙏🏻

I am taking machine design 1, and got a project to design a full gear box with just knowing input speed, output speed, power, and maximum dimensions. I watched like 6 videos and was able to finish the project. Thank you so much, and forever sir.

Thank you Sir you are doing a major service for students around the world.

Great lecture. Thank you for the in-depth breakdown.

Sir i have interest in machine designing and you just enhanced it like thousands times. Great lecture sir.

By far the best breakdown I've seen. Thank you so much.

Please recommend some of the books you use for your lectures. I love your lectures. They are great recap. Keep them coming!

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You are amazing,thanks from India.

First of all, congratulations for this great lecture. Could I use this same approach to design an engine crankshaft?

Thanks for the great presentations

Thanks sir I really needed this one

Thanks for the video. I have a question. I simulate these cases in ANSYS APDL. I have the bending moment from shaft weight (M_weight) and also from rotating unbalance (M_unbalance) as well as torque (T) and shear force coming from shaft weight (tau_weight) and unbalance (tau_unbalance). How would I define Ma, Mm, Ta and Tm? Where does my bending and shear from weight should go?

Hello! Any idea what would happen in the case where we have an alternating bending moment acting on a shaft? What usually happens is that we have a static bending moment acting on a rotating shaft, and the rotation causes the bending load to fully alternate. But I have never found an example in which the bending moment itself is alternating (ex. Mb = 10 +/- 5 Nm) WHILE the shaft is rotating. What would we write in the fatigue failure criterion for the bending stress in such an example?

Im from nepal and it helps a lot♥️

why the fatigue failure criterion not consider the shear stress due to transverse Loading? thank you.

Sir could you please tell the textbook using

Finally time to flesh out Statics 3!

Is this applicable for crank shaft

In case if I have a value of n and need to find diameter, can I use approximate d=1 to get Kb, and then use a real value of d for the next iteration?

what's the textbook used in this lecture.?

what if we want to know the diameter i,e the critical diameter under fatigue stresses.

hi...which book are you using?

i see only one bending moment diagram here? what if there is bending in xz plane along with xy plane?

Which book do you use for the lectures ?

dear sir which book do you prefer for this course?

I think at 1:05:06 the strategy you are using is wrong🤔