I like your real life example of a typical motorist surprised by puddles after the rain. So feel safer knowing that one or two out of ten motorists are actually competent enough to drive. After wrenching 50 years on everything with a motor wheels, wings or a hull, I didn't learn much from this, but it was clear and precise. Kudos to you good sir. Here's a tidbit you may not know from motor bearings: Motors with nonconductive bearings last much longer and restore full current to the windings instead of shunting through the journal to ground. RC Hobbyists discovered this after installing ceramic hybrid bearings in their hot 3 phase motors, yielding 12 - 15% increase in run time on batteries, and much longer life on the bearings. Keep up the great work!
A couple of mechanical engineering classes learning about this hydrodynamic bearings and its physics, and ending not picturing this. Just saw this video and everything becomes clear in my mind now. Thank you very much! Nice speach, tone, animations, explanations! Very nice work!
This video's make me think practically about the bearings and real life application ..concept very clear. thankss.. Love it.!❤️ Keep it up... Mechanical rocks..😎
Aren't there some hydrodynamic bearings that use wood as a bearing shell? Lignum Vitae I think. I think it was used extensively on some submarines for main propeller journals. Similarly what about bearings that don't use external lubricants, like bronze bushings?
Most European cars use special low viscosity oil like W 10 or W 15 because their tolerances are tighter and the gaps between metal parts are smaller. They don't work so well with a high viscosity oil like W 40 motor oil.
One way to make your cars engine last almost forever is to run a pre-oiler pump to flow and pre-presurise the entire lubrication system before every start-up. Problem is, planned obsolescence.
Jim The Raspberry huh. Imagine being so new to the internet/ life that you think this is something strange. Better yet, use some silly newfangled words to try insulting someone whilst hiding behind a computer. Why are you here?
@@jesseschumacher4080 Thicker fluids have a fuller mouthfeel. Oils in particular tend to form a film over the mucous membranes of the mouth, resulting in a flavour profile that seems to permeate all throughout the mouth instead of just being with the food or the drink it comes with. This is what they mean when they say "fat is flavour". Unfortunately unlike machines, humans don't tend to operate well when oiled up too much. The grease sticks to the fluid channels.
Clean, Clear, Concise! These videos provide a thoroughly understandable primer on a variety of subjects, and they're presented in a relatively fun format without talking down to the idiots, or being too dumbed-down for those of us with some knowledge in whichever field is being covered. Altogether, I give this series of videos an A+, or 5 outta 5★ Thank you for making these vids!
Uh, tell me that wasn't actually kerosene you just threw down the drain lol. Also, you should do a video on Hydrostatic Bearings. Ah, you got to hydrostatic, now I just need to know where you got those glasses.
@Stephen Anthony You shouldn't put anything down the drain that you wouldn't eat. Waste treatment plants aren't designed to remove non-waste components, in some places the water then becomes the public water supply, in others, it's crop water, or discharged to the ocean.
Dude! We definitely owe you a beer! I'm a retired instructor and feel quite good about seeing someone like you who does such an excellent job. You are well spoken and know your material and have very pertinent and well done graphics. Keep it up!
Great explanation, but how do we keep the liquid inside the bearing and prevent it from escaping along the shaft? A rubber seal that makes contact with both the shaft and the support won't increase the friction, and also won't be damaged quickly?
I'd like to know this too. I believe in part, though, that the high viscosity of the lubricant prevents itself from escaping between the microscopic openings of the bearing seals. The friction you're talking about is probably very low since there's low-pressure contact; just enough to hold in the lubricant. But maybe somebody else can expand on this since I'm still a novice in bearings myself.
My friend, i work in a power plant, this video has help me a lot to understand what it's happening when i'm checking clearence in the fans , blowers and also in the turbine journal bearing, you are the best my friend. I really hope to see new videos, thanks from Honduras.
Thank you very much for this very illustrative video. A lot of people use vintage sewing machines with several sliding bearings in them. I guess you can call them hydrodynamic bearings. The machines are typically more durable than modern machines with many plastic parts. Normally a low viscosity sewing machine oil is used and recommended for such machines, and you lubricate them regularly. Some like to use the machines for a bit harder applications with thicker thread and loads on the bearings, and at the same time operate the machine at significantly slower speed. I guess a bit higher viscosity oil like a normal motor oil would be better suited for such a situation. Am I right?
i am a student engineer that works at a bearing manufacturing facility. This is an excellent presentation of the information and you did a great job at breaking everything down in an accurate and concise manner.
Great video. I'm a fabricator/mechanic in the marine industry and have years of experience installing and servicing bearings of this type in boats drive trains. I really appreciated learning some of the theory behind something I am so familiar with the practical applications of. Thanks!
Dude, what a great introductory video on the topic! Thanks! But, maybe you should add a future video where you go in depth to more details? E.g. why the lubricant doesn't escape axially.
good day sir..for hydrodynamic bearing.The lubricant with viscosity what the PRESSURE of oil lubricant come to bed of BABBIT in Between of journal.thanks
Interesting, but what are speed limitations per size and force on axle for this to work? Thinking could this be utilized in for instance lathe bearings? How these things are calculated simply, with out long math and engineers degree?
Any studies of hydrodynamic bearings use in space applications (no or micro gravity, or rather weightlessness) with no gravity that makes the journal asymmetric arrangement in the shell. I think the pressures would be different too. EDIT:Found this NASA report from 1994 doing an overview on the literature on the space tribology - ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19940024896.pdf Highly recommended.
Hello, I have several extremely large Hydrodynamic Bearings at my plant. We refer to them as Babbitts. 4 of 5 of these babbitt pares operate nominally. However, the fifth "jerks" starts and stops. The rpm for the shaft is very low ~70 and the jerks are almost 1 per second. I have created several drawings and done extensive investigation but cannot determine the cause. Do you have any thoughts on this? I can provide much more information as requested.
Sorry, HDDs do not employ air bearings in the spindle that rotates the disk (or disks), they have FDBs, i.e. a sort of "oil"! The air-bearing people talk about in the context of an HDD is used to fly the head/slider over the disk! (But some heavy duty high-speed spindles, e.g for testing the disks and the heads on so-called spin-stands prior to building the heads and disks into HDDs, do indeed use spindles based on a rotating, externally pressurized air-bearing.)
Your presentation is perfect but i have one 2 comments Hydrodynamic and Hydrostatic refers to the lubricatons process and surfaces separation. So in anti-friction bearing there will be now hydrodynamic Lubrication ?? Bearings internationally classifed as friction and anti-friction .. Not hydrodynamic and anti-friction Hydrodynamic or hydrostatic? Simply stated Hydrostatic - positively pressurized bearing which doesn't rely on shaft motion to create the gap between surfaces Hydrodynamic totally relys on the shaft motion .. Thanks
In your statement regarding the plain journal bearing you mention chrome plating on the journal for increased wear resistance......WHY...…... and also state that they can theoretically last forever because they ride on a film of lubricant...…….this is a controversial statement......riding on a film of lubricant means there is no metal to metal contact so no wear can happen so no chrome plating needed. BTW, in todays mechanical world no machinery uses plain bearings in favour of ball or roller bearings. There is a difference though if you take for example an automobile engine that uses plain bearings for the big ends and crankshaft journals, but in that case the bearings ride on a constantly supplied pressurised supply of lubricant...….air bearings are also an example of plain bearings.
In principle a nice attempt to explain the background of bearings to the general audience, however as you correctly say, the devil is in the details. You're mixing terminology in several aspects from the very beginning. In mechanical engineering the main classification of bearings isn't into antifriction or hydrodynamic. Actually the basic differentiation is into "roller elements" or slide/plain bearings. As defined by the name, in the first case shaft and housing are separated by a rolling element spaced between and relativating the speed vectors. These rolling elements can be the famous balls, cylinders, truncated cones, whatever.... in the second case the shaft is running directly against the bearing itself. And the vast majority of plain bearings are not running hydrodynamic at all. Just think of all the linkages in earth moving equipment such as from Caterpillar or others. All these linkage bearings are greased plain bearings
missing: It's also very easy to ream fresh babbit to a correct diameter for older worn journals. missing: HDD bearings also come in designs that use Helium inside the housing and bearings. Far lower friction and mass than air for more efficient and higher speeds. missing: The end bearing is referred to as a "flotation bearing" if it uses pumped fluid, so is the shaft bearing if it continuously uses pumped fluids.
I went in expecting this to be a terrible video. I thought the Machine Tech would not know what he is talking about. I was wrong on both counts and I enjoyed the video. I hope you become more popular Machine Tech.
How does the ball turn.what direction. Roller can only go 2. The sphere go the two plus time side to side infinite increment..but does the race allow that
Noob question here, so does the grease/oil spill out of both ends as the shaft spins, or are there seals which can't be seen? If the grease seeps out of the ends, I assume there's constant flow of new grease in and a large mess at the ends? What am I missing here....?
Very nice videos till now i came across.sir please post more videos and now in more details rather than just introduction.videos on gas compressors will be most appreciated.
I like your real life example of a typical motorist surprised by puddles after the rain. So feel safer knowing that one or two out of ten motorists are actually competent enough to drive. After wrenching 50 years on everything with a motor wheels, wings or a hull, I didn't learn much from this, but it was clear and precise. Kudos to you good sir. Here's a tidbit you may not know from motor bearings: Motors with nonconductive bearings last much longer and restore full current to the windings instead of shunting through the journal to ground. RC Hobbyists discovered this after installing ceramic hybrid bearings in their hot 3 phase motors, yielding 12 - 15% increase in run time on batteries, and much longer life on the bearings. Keep up the great work!
I can't believe that I haven't stumbled upon this channel until now! This is wonderful, thank you!
A couple of mechanical engineering classes learning about this hydrodynamic bearings and its physics, and ending not picturing this.
Just saw this video and everything becomes clear in my mind now.
Thank you very much!
Nice speach, tone, animations, explanations! Very nice work!
Your videos are so refreshing compared to the average youtube crap!
69 like, yw
I cannot believe this isn't a more popular channel. Very well done! Thanks :)
no body likes to study,only entertainment
Matt Phillips he does have lots of facts
agree - this is great and cant believe it isn't more popular . . .
That's because this channel is for geeks'n'nerds.
Entertainment is for everyone, but knowledge only for the Curious. . .
What a good show and so clear to understand well done from Australia.
Buddy discovered your channel few days back and I must say that you are doing a very good job. Hats off to you man
Cheers mate, I did learn something! If only all youtube vids were so informative and concise!
your accent is indescribable ,fantastic and clear as well , i hve learned a lot from you MAN keep it up
So informative! This is incredible helpful. I have been searching for a channel like this for a long time. Please make more videos! Thank you!
This video's make me think practically about the bearings and real life application ..concept very clear. thankss.. Love it.!❤️ Keep it up... Mechanical rocks..😎
Best explanation ever
Very good explanation.
Thanks a lot for your wonderful explanation
what a great demonstration!!!!
one of the best videos.
love it Thanks Machine Tech .
Could you do a video on suspended bearings, this are the kind that float on a magnetic field .
Next level video man well done
I love your impression of loosing control at aquaplaning!! Greetings from Germany
Thanks. It was very clearly explained and interesting.
That was super informative!!! A boost for exam. thumbs up to you!
Aren't there some hydrodynamic bearings that use wood as a bearing shell? Lignum Vitae I think. I think it was used extensively on some submarines for main propeller journals. Similarly what about bearings that don't use external lubricants, like bronze bushings?
Did you just poor molasses and kerosene on your floor? Thats commitment right there. Love your videos, they are very helpful.
You have done great.... Exactly this is the video...m looking for.... Thank u sir
Most European cars use special low viscosity oil like W 10 or W 15 because their tolerances are tighter and the gaps between metal parts are smaller. They don't work so well with a high viscosity oil like W 40 motor oil.
Never heard of these things before, very informative.
Great video!
His vids go great props.. Look like he go diff locate
Love this channel! And your face when hydroplanning :D :D
:D
The last thing you'll see. At least it's a good face.
Wow....love ur videos, thank you.
You do a great job... Keep up the great videos...
Bearings - Brought to you by Lexx Luthor.
So in that case, a crankshaft in an automobile engine uses hydrodynamic bearings, correct?
I learn allot thank you dam good explanation 10/10
That’s the same method used in the internal combustion engine assisted by an oil pump😃
you are amazing thanks
One way to make your cars engine last almost forever is to run a pre-oiler pump to flow and pre-presurise the entire lubrication system before every start-up. Problem is, planned obsolescence.
1:04 What is the efficiency of both types of bearings?
I never knew .....thanks
he didn't answer the one question on everyone's mind; how to keep the fluid from leaking, or leaving the bearing, thus causing catastrophic failure.
best mechanical engineering videos on youtube
Great great great!!!
So you’re telling me that viscosity has a direct proportion relationship with tastiness?
Jim The Raspberry huh. Imagine being so new to the internet/ life that you think this is something strange. Better yet, use some silly newfangled words to try insulting someone whilst hiding behind a computer. Why are you here?
@@jesseschumacher4080 Thicker fluids have a fuller mouthfeel. Oils in particular tend to form a film over the mucous membranes of the mouth, resulting in a flavour profile that seems to permeate all throughout the mouth instead of just being with the food or the drink it comes with.
This is what they mean when they say "fat is flavour". Unfortunately unlike machines, humans don't tend to operate well when oiled up too much. The grease sticks to the fluid channels.
Clean, Clear, Concise! These videos provide a thoroughly understandable primer on a variety of subjects, and they're presented in a relatively fun format without talking down to the idiots, or being too dumbed-down for those of us with some knowledge in whichever field is being covered.
Altogether, I give this series of videos an A+, or 5 outta 5★
Thank you for making these vids!
Uh, tell me that wasn't actually kerosene you just threw down the drain lol. Also, you should do a video on Hydrostatic Bearings.
Ah, you got to hydrostatic, now I just need to know where you got those glasses.
@Stephen Anthony You shouldn't put anything down the drain that you wouldn't eat. Waste treatment plants aren't designed to remove non-waste components, in some places the water then becomes the public water supply, in others, it's crop water, or discharged to the ocean.
@Stephen Anthony Nah. It's really high in Calories.
Hey guys look and listen. That was really water. See droplets and the sound is consistent with water not kerosene! Ease up on the guy.
this channel is fantastic GUYS KEEP IT UP PLEASE.
Dude! We definitely owe you a beer! I'm a retired instructor and feel quite good about seeing someone like you who does such an excellent job. You are well spoken and know your material and have very pertinent and well done graphics. Keep it up!
OMG THANK YOU FOR THIS VIDEO! (I bought hydrodynamic fan for my pc and I didn't understand what that means, now I do!)
Alhamdulilah very good teacher, God bless you, keep it up man.
Why you gotta dump that molasses down the drain
Great explanation, but how do we keep the liquid inside the bearing and prevent it from escaping along the shaft? A rubber seal that makes contact with both the shaft and the support won't increase the friction, and also won't be damaged quickly?
I'd like to know this too. I believe in part, though, that the high viscosity of the lubricant prevents itself from escaping between the microscopic openings of the bearing seals. The friction you're talking about is probably very low since there's low-pressure contact; just enough to hold in the lubricant. But maybe somebody else can expand on this since I'm still a novice in bearings myself.
The problem with any kind of bearings is regular lube. I have a job that exists because people doesn't maintain their their equipment :D
@Evi1M4chine automatic lube systems exist. But they are espensive as divorce. So they are used mostly in hard to reach places.
Boing boing
My friend, i work in a power plant, this video has help me a lot to understand what it's happening when i'm checking clearence in the fans , blowers and also in the turbine journal bearing, you are the best my friend. I really hope to see new videos, thanks from Honduras.
marvin if you want taper roller bearing so contact on+91 9426639958 whatsapp only]
Such a well done video! Makes me miss the good old science days... before pawn stars was history and naked and afraid was science channel.
Thanks for the video. You have explained the concepts so clearly with proper pictures and animation. 👍
Thank you very much for this very illustrative video.
A lot of people use vintage sewing machines with several sliding bearings in them. I guess you can call them hydrodynamic bearings. The machines are typically more durable than modern machines with many plastic parts. Normally a low viscosity sewing machine oil is used and recommended for such machines, and you lubricate them regularly. Some like to use the machines for a bit harder applications with thicker thread and loads on the bearings, and at the same time operate the machine at significantly slower speed. I guess a bit higher viscosity oil like a normal motor oil would be better suited for such a situation. Am I right?
Adam, I wish there is multiple like button to like your videos. you should make more of these amazing and easy videos. regards.
i am a student engineer that works at a bearing manufacturing facility. This is an excellent presentation of the information and you did a great job at breaking everything down in an accurate and concise manner.
Very good explanation i support your channel....
i will tell my friends about this channel
Can't beleive this channel has so few subs. One of the best at explaining things ive seen all over youtube. Keep it up
Great video. I'm a fabricator/mechanic in the marine industry and have years of experience installing and servicing bearings of this type in boats drive trains. I really appreciated learning some of the theory behind something I am so familiar with the practical applications of. Thanks!
Dude, what a great introductory video on the topic! Thanks! But, maybe you should add a future video where you go in depth to more details? E.g. why the lubricant doesn't escape axially.
good day sir..for hydrodynamic bearing.The lubricant with viscosity what the PRESSURE of oil lubricant come to bed of BABBIT in Between of journal.thanks
Spot on!! Except for one thing - embedded contaminants will most definitely score the shaft - not good
Interesting, but what are speed limitations per size and force on axle for this to work? Thinking could this be utilized in for instance lathe bearings? How these things are calculated simply, with out long math and engineers degree?
If he just had "Alton" as his first name and steered away from unitaskers this channel could've worked. Too bad.
Any studies of hydrodynamic bearings use in space applications (no or micro gravity, or rather weightlessness) with no gravity that makes the journal asymmetric arrangement in the shell. I think the pressures would be different too.
EDIT:Found this NASA report from 1994 doing an overview on the literature on the space tribology - ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19940024896.pdf Highly recommended.
Hello, I have several extremely large Hydrodynamic Bearings at my plant. We refer to them as Babbitts. 4 of 5 of these babbitt pares operate nominally. However, the fifth "jerks" starts and stops. The rpm for the shaft is very low ~70 and the jerks are almost 1 per second. I have created several drawings and done extensive investigation but cannot determine the cause. Do you have any thoughts on this? I can provide much more information as requested.
Adam would you recomende any book or resources to get !
thanks very much !!
Sorry, HDDs do not employ air bearings in the spindle that rotates the disk (or disks), they have FDBs, i.e. a sort of "oil"! The air-bearing people talk about in the context of an HDD is used to fly the head/slider over the disk! (But some heavy duty high-speed spindles, e.g for testing the disks and the heads on so-called spin-stands prior to building the heads and disks into HDDs, do indeed use spindles based on a rotating, externally pressurized air-bearing.)
Your presentation is perfect but i have one 2 comments
Hydrodynamic and Hydrostatic refers to the lubricatons process and surfaces separation.
So in anti-friction bearing there will be now hydrodynamic Lubrication ??
Bearings internationally classifed as friction and anti-friction .. Not hydrodynamic and anti-friction
Hydrodynamic or hydrostatic?
Simply stated
Hydrostatic - positively pressurized bearing which doesn't rely on shaft motion to create the gap between surfaces
Hydrodynamic totally relys on the shaft motion ..
Thanks
Good explanation, but you obviously have never tasted straight molasses. Black strap molasses is even worse.
Superb quality videos! What about self-lubricating oil impregnated bronze bearings/bushings?
In your statement regarding the plain journal bearing you mention chrome plating on the journal for increased wear resistance......WHY...…... and also state that they can theoretically last forever because they ride on a film of lubricant...…….this is a controversial statement......riding on a film of lubricant means there is no metal to metal contact so no wear can happen so no chrome plating needed. BTW, in todays mechanical world no machinery uses plain bearings in favour of ball or roller bearings. There is a difference though if you take for example an automobile engine that uses plain bearings for the big ends and crankshaft journals, but in that case the bearings ride on a constantly supplied pressurised supply of lubricant...….air bearings are also an example of plain bearings.
In principle a nice attempt to explain the background of bearings to the general audience, however as you correctly say, the devil is in the details. You're mixing terminology in several aspects from the very beginning. In mechanical engineering the main classification of bearings isn't into antifriction or hydrodynamic. Actually the basic differentiation is into "roller elements" or slide/plain bearings. As defined by the name, in the first case shaft and housing are separated by a rolling element spaced between and relativating the speed vectors. These rolling elements can be the famous balls, cylinders, truncated cones, whatever.... in the second case the shaft is running directly against the bearing itself.
And the vast majority of plain bearings are not running hydrodynamic at all. Just think of all the linkages in earth moving equipment such as from Caterpillar or others. All these linkage bearings are greased plain bearings
a
missing: It's also very easy to ream fresh babbit to a correct diameter for older worn journals.
missing: HDD bearings also come in designs that use Helium inside the housing and bearings. Far lower friction and mass than air for more efficient and higher speeds.
missing: The end bearing is referred to as a "flotation bearing" if it uses pumped fluid, so is the shaft bearing if it continuously uses pumped fluids.
Hey all, what would be the main benefit, if any of pressure lubricated vs splash lubricated? thanks a mill, great channel.
hardness of the journal must be higher by 120 HB than hardness of the pillow block
Ah, You are such an amazing person. Finally understood what these god's sake bearings are.
I went in expecting this to be a terrible video. I thought the Machine Tech would not know what he is talking about. I was wrong on both counts and I enjoyed the video. I hope you become more popular Machine Tech.
The humor is good and well-portioned. Could do with 1 or 2 more comedy moments, but this rate is quite effective.
You are just super! It's really rare to find such good quality explanation for mechanical concepts. THANK YOU!!
How does the ball turn.what direction.
Roller can only go 2.
The sphere go the two plus time side to side infinite increment..but does the race allow that
Today I am first time here and I am shocked how nice and easy to understand are you explaining this stuff, thanks bro, take sub and I wish u the best!
You better have poured that molasses into some kind of batter rather than just in the trash!!! 😮😲😄
nice job, came here for the topic and stayed because I am a mechanical enginerd and love anything mechanical! 😀
Noob question here, so does the grease/oil spill out of both ends as the shaft spins, or are there seals which can't be seen? If the grease seeps out of the ends, I assume there's constant flow of new grease in and a large mess at the ends? What am I missing here....?
how do they not lose lubricant constantly? and also please go over modern HDB that are used fans ETC
Hi i would like to know how does Marine bearing assembly on Anion pump (should the seals be installed on either site to cover or only on the discharge
Do stop start cars have constant oil pressure? if not that must be the most stupid design ever, since the crankshaft is a hydrodynamic design.
Practically it is very important to set up correct rate of the hardness of the journal surface and the surface of the pillow block in stationery.
Great fan of your content. and ur presentation. but, hey. colorless kerosene ?!?? its blue in my country.
Shafts and lubricants.. hmm..
i can´t argue that i did not learn something.. but..
how did i get here?
Excellent video!! Very helpful. Can you also explain oil whirl and oil whip please?
Very nice videos till now i came across.sir please post more videos and now in more details rather than just introduction.videos on gas compressors will be most appreciated.
this.channel. is so good for mechanical engineers.. Becoz it's easiest way to understand... ..
flowing water cuts stone similarly wouldn't the lubricant cut the shaft over time ?
do you realize the number of sexual innuendo there is between min 1 an 2!!!! I was crying!