I'm very glad they have helped! It sounds like you may have found them already, but I have the content that I teach out of the Shigley textbook collected in these two playlists: MEEN361: ua-cam.com/play/PL1IHA35xY5H5AJpRrM2lkF7Qu2WnbQLvS.html and MEEN462: ua-cam.com/play/PL1IHA35xY5H5KqySx6n09jaJLUukbvJvB.html Thanks for watching!
@@TheBomPE Thank you for this lecture. Probably the best one I have found. I want to design an arrangement which uses a 3/4 UNF threaded rod as a power screw. Can I use the same formulae to calculate the required torque and just change from the 29 degree ACME thread angle to the specified angle for the normal screw thread? Thanks
Very valuable information and done in a moderate pace. This is the information that engineers lose in modern day work environments. This is worth more than gold. Thank you!
I think he made an error on the last discussion of self locking screw, if your required torque to lower the load is positive, it should mean that is a self locking situation (it is not going to be moved by the load weight and the force of gravity), but if the required torque needed to lower the load is zero or negative it means that the load being moved by its own weight is greater that the resistance offered by the friction of the screw, and if the motor is not kept energized and in an electrically "locked" situation the load by itself will make the screw turn and lower itself, I really appreciate these lectures being online and available to everyone, great they share the knowledge.
Very grateful for these lectures! You comprehensively cover both Machine Design I and II. I wish I found your lectures sooner so that machine design wouldn't have been a frightening and difficult subject for me. Now, it's actually an interesting subject and I appreciate it more, although it requires a lot of study hours to grasp such a wide subject. Thank you!
Thank you for your very informative lecture. I'd like to know the formula for calculating the torque required for hand tapping. I really need your help. exam cast iŕon m48 x 5p. THANKS
@@TheBomPE hahahahahah you think he speaks Turkish:), Sir, he says : Are you the messiah sent by god to help mechanical engineering students globally:)?
Could you please clarify the self locking part further. I don't know if it is just your terminology, but it sounds back to front. Is this another way of referring to screws back driving ability? So if that is what it means, then would a self locking screw mean one that doesn't back drive? I think the terms are confusing. I would say that if I hold a threaded rod vertical, and a loaded nut on that rod descends due to gravity, then it is not self locking, and vice versa. Am i misunderstanding the terms? Thanks
Dear Sir Your Lectures are great Can you please start a video lecture series on Theory of machines and mechanism because there is not enough and sufficient material on You Tube regarding this course
Thanks for your support! Unfortunately I have had many pressures on my time (some being COVID-related) and my production of videos has largely had to be put on hold. (UA-cam currently can't come close to supporting my family and I, so it has to be fit in after other responsibilities are met.) I am listening to requests, though, and I like your suggestion. Generally what makes the production of a video series possible within my means is if I have a chance to teach a particular course at the university where I have my main job. I am often assigned to teach courses for which I have already produced lecture videos, as is the case this term. So my video production will likely remain slow for the next few months, sorry to say. But thanks again for your support!
@@TheBomPE Sir Your Safety and comfort is top most priority and i pray to GOD that every thing gets back to the way it was or it use to run before COVID but your great Sir I have learnt a lot from you Thank you
You are very kind. I'm also petitioning The Almighty for his grace with respect to the situation in the world at this time. May he bless you and your family.
My God if that isn't true. Theory of Machines is like some kind of high-level government classified top secret thing considering the lack of information about it.
Thank for the lesson. it helps me a lot for calculation and formula i needed. may i know the reference book name as well to be able to follow up the lesson 100% ?
Thank you for the tutorial. Your explanation is perfectly clear. I have one general question regarding square threads. Is the thread designed to have the same strength as the shaft or does it have lesser or more strength? In other words, if we apply an increasing torque to the nut, what will fail first, the thread or the shaft?
Hello, Thank you for the lecture! I have a question. Do the formula's still hold if you need to push a load horizontally using the power screw? Thank you for your time!
It doesn't matter what direction the screw is oriented. What matters is whether the force applied to the nut is oriented the same direction or the opposite direction as the direction of travel. Thanks for watching!
Thanks, I'm glad you enjoyed it! I have two courses that I teach out of this text (Shigley), and I have a good number of videos presenting this material, organized into these playlists: MEEN361: ua-cam.com/play/PL1IHA35xY5H5AJpRrM2lkF7Qu2WnbQLvS.html and MEEN462: ua-cam.com/play/PL1IHA35xY5H5KqySx6n09jaJLUukbvJvB.html Check them out if you are interested! Thanks for watching!
Thanks for clearing this up for me. I just have a quick question, what would change if your nut was connected to a bar and load F was applied 5 cm away to this part? You would get a torque at the center point of the nut.
Hello Dr BOM I like your course Ware so much it help me in so many ways that you cannot think of any time I face a design challenge I referred to your materials, but the question I have though in the sense of me preparing for my PE exam in this particular topic in finding the lead and referring the figure 8-6 that you pull up if I am not looking at this the wrong way I think lead=pi*dm*tan(lead angle) for single thread please advise
Hi, what if the load is perpendicular to the axis of the screw? For example, looking at the screw drawing on this video, the load is on top of that. Like a carriage moving horizontally. In this case there is no load acting along the screw, or is there?
Hi. Its really good teach. But I wonder, when we change the number of threads how torque effects ? When we make it 2 it's velocity multiply by 2 what about torque requested by motor?
Radians are actually unitless since they are defined by arclength/radius which are both lengths. The derivation of P=(torque)x(angular velocity) makes use of radian measure because of this.
If you found this video useful, consider helping me upgrade the old tablet PC I use to create these videos! Thanks! www.gofundme.com/help-replace-my-2011-tablet-pc
Thank you for making these lectures open to everyone! I cannot tell you how much these lectures helped me!
I'm very glad they have helped! It sounds like you may have found them already, but I have the content that I teach out of the Shigley textbook collected in these two playlists:
MEEN361: ua-cam.com/play/PL1IHA35xY5H5AJpRrM2lkF7Qu2WnbQLvS.html and
MEEN462: ua-cam.com/play/PL1IHA35xY5H5KqySx6n09jaJLUukbvJvB.html
Thanks for watching!
@@TheBomPE Thank you for this lecture. Probably the best one I have found. I want to design an arrangement which uses a 3/4 UNF threaded rod as a power screw. Can I use the same formulae to calculate the required torque and just change from the 29 degree ACME thread angle to the specified angle for the normal screw thread? Thanks
Very valuable information and done in a moderate pace. This is the information that engineers lose in modern day work environments. This is worth more than gold. Thank you!
Glad it was helpful!
it helped me a lot. at last time before papers i got aal formulas and concepts which was suuficient
I'm glad it was helpful! Thanks for watching!
I think he made an error on the last discussion of self locking screw, if your required torque to lower the load is positive, it should mean that is a self locking situation (it is not going to be moved by the load weight and the force of gravity), but if the required torque needed to lower the load is zero or negative it means that the load being moved by its own weight is greater that the resistance offered by the friction of the screw, and if the motor is not kept energized and in an electrically "locked" situation the load by itself will make the screw turn and lower itself, I really appreciate these lectures being online and available to everyone, great they share the knowledge.
Isn't that what he said?
Very grateful for these lectures! You comprehensively cover both Machine Design I and II. I wish I found your lectures sooner so that machine design wouldn't have been a frightening and difficult subject for me. Now, it's actually an interesting subject and I appreciate it more, although it requires a lot of study hours to grasp such a wide subject. Thank you!
Thanks for this thorough video, it saved my ass at work : )
I'm glad I could help! Thanks for watching!
Thank you so much. It was a really useful video. Regards from Pakistan
Glad it was helpful! Thanks for watching!
Thanks, Micheal. I will make sure to solve the question relative to power screw in my national exam coming up....
Best of luck on your exam! I hope I have helped!
Dayın yoksa istiyorsan full çek.
Thank you for your very informative lecture. I'd like to know the formula for calculating the torque required for hand tapping. I really need your help. exam cast iŕon m48 x 5p. THANKS
Allah mı gönderdi seni be adam! Ne güzelsiniz Ne güzel!
Thank you, I think! (If I am to trust Google Translate)
@@TheBomPE hahahahahah you think he speaks Turkish:), Sir, he says : Are you the messiah sent by god to help mechanical engineering students globally:)?
Could you please clarify the self locking part further. I don't know if it is just your terminology, but it sounds back to front. Is this another way of referring to screws back driving ability? So if that is what it means, then would a self locking screw mean one that doesn't back drive? I think the terms are confusing. I would say that if I hold a threaded rod vertical, and a loaded nut on that rod descends due to gravity, then it is not self locking, and vice versa. Am i misunderstanding the terms? Thanks
Dear Sir
Your Lectures are great
Can you please start a video lecture series on Theory of machines and mechanism because there is not enough and sufficient material on You Tube regarding this course
Thanks for your support! Unfortunately I have had many pressures on my time (some being COVID-related) and my production of videos has largely had to be put on hold. (UA-cam currently can't come close to supporting my family and I, so it has to be fit in after other responsibilities are met.) I am listening to requests, though, and I like your suggestion. Generally what makes the production of a video series possible within my means is if I have a chance to teach a particular course at the university where I have my main job. I am often assigned to teach courses for which I have already produced lecture videos, as is the case this term. So my video production will likely remain slow for the next few months, sorry to say. But thanks again for your support!
@@TheBomPE
Sir
Your Safety and comfort is top most priority and i pray to GOD that every thing gets back to the way it was or it use to run before COVID
but your great Sir I have learnt a lot from you
Thank you
You are very kind. I'm also petitioning The Almighty for his grace with respect to the situation in the world at this time. May he bless you and your family.
@@TheBomPE
Thanks Sir
My God if that isn't true. Theory of Machines is like some kind of high-level government classified top secret thing considering the lack of information about it.
Thank for the lesson. it helps me a lot for calculation and formula i needed.
may i know the reference book name as well to be able to follow up the lesson 100% ?
I was using Shigley's Mechanical Engineering Design, 10th ed.
I'm glad it helped! Thanks for watching!
TheBom_PE thank for quick and kindly reply. sir . Appreciated it :)
Thank you for the tutorial. Your explanation is perfectly clear. I have one general question regarding square threads. Is the thread designed to have the same strength as the shaft or does it have lesser or more strength? In other words, if we apply an increasing torque to the nut, what will fail first, the thread or the shaft?
Hello,prof,thanks for your wonderful lecture, I want to ask the book you used.
Hello,
Thank you for the lecture! I have a question. Do the formula's still hold if you need to push a load horizontally using the power screw? Thank you for your time!
It doesn't matter what direction the screw is oriented. What matters is whether the force applied to the nut is oriented the same direction or the opposite direction as the direction of travel. Thanks for watching!
@@TheBomPE Hey, similar to that Q does it matter if the threads are not ACME? for instance if my threads were a Metric M5.5x0.5?
Good
Glad you liked it! Thanks for watching!
Nice Lecture Bro.......
Thanks, I'm glad you enjoyed it! I have two courses that I teach out of this text (Shigley), and I have a good number of videos presenting this material, organized into these playlists:
MEEN361: ua-cam.com/play/PL1IHA35xY5H5AJpRrM2lkF7Qu2WnbQLvS.html and
MEEN462: ua-cam.com/play/PL1IHA35xY5H5KqySx6n09jaJLUukbvJvB.html
Check them out if you are interested! Thanks for watching!
Thanks for clearing this up for me. I just have a quick question, what would change if your nut was connected to a bar and load F was applied 5 cm away to this part? You would get a torque at the center point of the nut.
Hello Dr BOM I like your course Ware so much it help me in so many ways that you cannot think of any time I face a design challenge I referred to your materials, but the question I have though in the sense of me preparing for my PE exam in this particular topic in finding the lead and referring the figure 8-6 that you pull up if I am not looking at this the wrong way I think lead=pi*dm*tan(lead angle) for single thread please advise
Hi, what if the load is perpendicular to the axis of the screw? For example, looking at the screw drawing on this video, the load is on top of that. Like a carriage moving horizontally. In this case there is no load acting along the screw, or is there?
Hi. Its really good teach. But I wonder, when we change the number of threads how torque effects ?
When we make it 2 it's velocity multiply by 2 what about torque requested by motor?
What is the book title and authors. And what edition?
I was using Shigley's Mechanical Engineering Design, 10th edition, US version. Thanks for watching!
Why the radiant units were removed when converting from 1n-lb/sec to H.P.? Was he missinsg some units from the conversion or result?
radians are technically unitless because radian measure is defined as arclength/radius.
Thank you
how would the eqn 8.5 change in case of a multi-start thread
Whats the name of the book? Thank you for the lectures
Shigley's Mechanical Engineering Design, 10th edition
How can i calculate the consumed power?
How did you cancel the radians on the P_R calculation at 59:50? To find hp
Radians are actually unitless since they are defined by arclength/radius which are both lengths. The derivation of P=(torque)x(angular velocity) makes use of radian measure because of this.
@@TheBomPE Thank you for the speedy clarification. I did not know about that. Very helpful video too.
What book you teach pls??
I use Shigley's Mechanical Engineering Design, 10th edition. Thanks for watching!
If you found this video useful, consider helping me upgrade the old tablet PC I use to create these videos! Thanks!
www.gofundme.com/help-replace-my-2011-tablet-pc