World's biggest gear ratio...

[@zenith1047]

There's something like this at the MIT museum (or at least it was a piece there when I last visited): a gear train with massive reduction and the final gear is actually carved out of the stone that it is mounted to. It's impossible for the final gear to move, but the beginning wheels are still able to be turned.

[@Known_as_The_Ghost]

That sounds kinda cool, tbh.

[@saisubdivision3941]

Imagine aliens coming upon this wall that is slightly tilted by a fraction of a centimeter in the future

[@zenith1047]

For those interested, I've found the piece: it's called "Beholding the Big Bang" and it's a bit different than what I recalled (it has been years since I've been to that museum and seen the exhibit). The final gear is embedded in concrete, not carved out of stone, and it's an electric motor turning the first gears, not a hand crank. kzbin.info/www/bejne/jHSkY6qepbJ2pNE

[@spray_cheese]

That’s really cool actually

[@yun-z]

the mechanical flex of all the gears probably compounds up

[@collectorguy3919]

You can't spin the last gear, but what gear can you spin from to maximize speed of the first gear?

[@notlistening6499]

I would like this comment but it has exactly 69 likes and I don't want to ruin that

[@blades7178]

I’ll ruin it

[@collectorguy3919]

@@notlistening6499 been there, done that

[@henerygreen578]

you see him spin 3rd gear............thats about it

[@mouse5178]

I’d have gone straight to the last gear

[@baguette1014]

Damn just imagine the amount of force you would need to spin the last gear by hand and how fast it would make the first gear spin if you spun it from the last gear

[@matthewmaillette]

The whole thing would explode but it would be glorious

[@Godolotl]

Assuming the gears were indestructible and you could apply infinite force, if you spun the last gear, the first gear would be moving far faster than the speed of light

[@baconwizard]

@@Godolotl but as you approached closer to the speed of light, from the gears perspective, time would be slowing down which would inadvertently slow down the rotational speed of the last gear who’s torque is probably enough to lift up the whole universe.

[@Godolotl]

@@baconwizard well yes, but this whole thing is irrational to begin with. I mean that gear ratio is just a "because I can" thing. If you actually could apply infinite force, I'm unsure if you could ever actually reach the speed of light due to time dilation. On the outside it would appear close to the speed of light, but from the 'gear's perspective' everything would speed up. This weird dynamic is why the "speed of light" is so odd.

[@Godolotl]

@@baconwizard but, I'm not knowledgeable enough to keep talking about this subject, that's getting into general and special relativity, which I don't have the confidence to speak openly about. Perhaps someone else will figure out a explanation.

[@pyglik2296]

2:50 It's even hard to understand how MUCH BIGGER this number is. If EVERY atom in the observable universe had its OWN observable universe within it with the same amount of atoms, then the number of all the atoms COMBINED would've still be a HUNRDED THOUSAND times smaller than this gear ratio!

[@TylerPilizota]

Thank you for that, my brain is malfunctioning now but still cool as hell

[@nup5]

as if our universe isn't already mind blowing enough, lmao. thanks for putting this number into perspective :)

[@sean2susini]

🤯

[@kck-kck879]

Horton logic lol

[@mrmeckles9422]

Your scaring me

[@lagcom]

I never thought I’d ever experience cosmic horror from such a small object

[@OGbqze]

It would be cool to see a gearbox like this but with 2:1 gear ratios so we can see it actually working.

[@danankofski5287]

even with a 2:1 ratio the last gear still would take an unimaginable time to move

[@noahc8997]

Great so instead of 10^169 we get 2^169.

[@kkatsuro-bl1zv]

@@noahc8997 how about 101 to 100 teeth gears? then it will be 1.01:1 and 1.01^169 = only 5.37. Am I doing this right?

[@michaeldreemurrandhisaus2165]

@@noahc8997it’s still significantly lower than the alternative

[@elfeiin]

Hi ​@@kkatsuro-bl1zv

[@joshjones3733]

I'm working on my own insane gearbox using planetary and grinder gears to achieve a ridiculous 500:1 gear reduction per stage. It will only need 63 stages to pass your gearbox. The crazy thing is that the design has an extremely small profile with a thickness of just .25in per stage and an external radius of 5in. The total length of the gearbox will be just under 16 inches

[@MelodicEgghead]

I subbed to you!!! Can't wait to see it

[@turzilla]

thats so sick

[@zema1846]

Звучит как что-то похожее на часовой механизм

[@CreativeMindstorms]

This is actually mindblowing! It must have taken a whole lot of time to make this video as well. Amazing!

[@andysim232]

Crazy thing is, if you could spin the first gear at an infinite rpm, the last gear would spin at infinite rpm too

[@SentinelxPrime]

Idk about that

[@turzilla]

not really because of other mechanical factors

[@nazfx2648]

@@turzilla bro said not really😂😂. The first one spins infinitely so the last moves infinitely end of story. We dont care if it breaks or whatever this is hypothetical

[@turzilla]

@@nazfx2648 nah we do care so not really

[@XtreeM_FaiL]

It would create infinity mass black hole before the last grear starts moving.

[@OttoLP]

The last wheel cant actually spin right?

[@CroissantCreates]

After the sun burns out it might

[@AKgamerYTbe]

What if i spin the last gear?

[@AKgamerYTbe]

Well it won't even spin then :'(

[@Oliver-ur5pi]

It can just after the whole universe is gone

[@OttoLP]

@@CroissantCreates no, I mean, since the plastic isn't strong enough.

[@haydarlab]

Try to move the last gear if you can, the rest of the gears will rotate at fantastic speeds

[@CroissantCreates]

Nothing will move because the energy required to turn the first gear is greater than every motor on earth combined. The wheel would need to be built to the size of a planet to not sheer from the force alone

[@haydarlab]

@@CroissantCreates Right, he should lower the number of gears a bit

[@veni2598]

Is not possible! When you play with gears ratio you also play with torque ratio

[@clothinghanger6978]

the about of force it would take to turn that last gear would shatter it

[@Benlucky13]

He did that in another video, but with a much smaller gearbox. Probably close to the highest gear ratio possible in this style without major design changes. He got 1:1200 or so iirc, and that needed a foot long crank handle. m.kzbin.info/www/bejne/lXLFXoehnqylo9E

[@crandonborth]

Last one will still prolly still make a revolution before GTA 6 is released...

[@concept5631]

'bout that

[@TheAngelChaz]

I would love to see how fast the first gear would spin if it was possible to spin the last!

[@FilosophicalPharmer]

Math.

[@MistahPhone]

You stole his pfp

[@User-qc7gn]

Me too

[@astrouphel]

It's literally impossible for him to do so, unfortunately. But I'd love to see what incredibly reality-warping things would happen.

[@XtreeM_FaiL]

10^169 times faster.

[@daytona2786]

2:39 who made this photo ? maybe its just a picture , not a photo >?

[@notlistening6499]

That's cool and all, but actually it is more than likely that friction will cause a good chunk of the gear box to never move at all, and rotating the first gear for long enough will cause some of the gears to simply snap.

[@-Yousof-]

🤯

[@DubsDeBosta]

I realy wanna see some technological microscope company making one of these to see at which gear the molecules dont move at all

[@seephor]

I wonder how astronomical the torque would be on that last gear. Probably enough to move the world in theory.

[@XtreeM_FaiL]

It could crush the known universe into a black hole.

[@Inhale_8632]

in theory it takes more torque to rotate it than there is energy in the known universe

[@Raphael4722]

The gears would surely break if you applied such a torque to them.

[@pilbomags488]

These gears would dissolve before it even spun the last one.

[@chickey333]

How many estimated years would it take to get all the slack out of this contraption before the last gear could even move?

[@TantalumPolytope]

all the years

[@gaabbrriieelllaa]

10^169 secs at minimum

[@jeffreyjones6239]

The music at 3:21, where you start talking about Brilliant... How can I find it? I HAVE to have it!!

[@YazanMaklad]

Friend: Don't spin the last gear! Me: *spins it just a bit* Universe: *explodes*

[@Michael24633]

What if you used a giant F1 rocket engine with 35 million newtons of thrust to spin the last gear. Or use the catastrophic force of a nuclear bomb to push the last gear, spinning the first gear at the speed of light. You would have to have the last gear to be big enough to actually utilize the rocket or the bomb, and attach a heat shield to keep the gear from burning.

[@paulromsky9527]

Great video. Too bad you didn't include digits 0 to 9 embossed on each gear as you printed them. Then you could see how many revolutions of the first gear have occurred. Can you imagine the torque that could theoretically be put on that final gear.

[@TOM_RIDDLE_69]

If we attached electric motor when we attached motor if we rotate 4 or 5 gear by hand then how much electricity generate ?

[@qbitsday3438]

What happens if you spin the grey gear in the 4th Row. will the Orange gear spin faster in the first row ? Just Curious!

[@abhiramaji1782]

Most probably it won't spin. It would require a tremendous amount of force to move it even a little

[@kasra.rasaee]

If you have a gear train with such a high gear ratio and multiple gears, there's a significant torque multiplication happening at each gear stage. By the time you reach the last gear, the torque applied to it could be immense, potentially exceeding the torque capacity of the gear teeth or the gearbox itself.

[@mdylanjournet]

What happen if you try to turn the last gear Does it break ? Does the first gear turn faster than the speed if light ? Or does it does nothing

[@odenroberts7603]

the torque needed would be so high, that it would probably break the gear. so, number 1

[@mdylanjournet]

@@odenroberts7603 allright, thanks for awnsering

[@odenroberts7603]

Take it with a pinch of salt, Im not a physicist

[@thatoneguy611]

If you turn by hand it would just do nothing. With a powerful enough motor, the gears would just break.

[@petit.corbeau]

What if you built a gear box that scaled back the rotation ration to the original gear and then set the original gear in motion by an external gear and a lever?

[@XtreeM_FaiL]

Same as now. Nothing, but you could rotate both ends at the same time and even different direction.

[@greenneon8534]

If you somehow got enough energy and force to spin the last gear, then you would open up a wormhole at the other end because it would go faster than the speed of light.

[@Musafiri529]

Connect it to the engine of the motorbike

[@HighNoone]

The mounting points and the plastic will become worn and brittle, fall to dust before the last gear rotates

[@808Xian]

Another video in my life of things I don't understand but still very intrigued and interested in.

[@chaplainmattsanders4884]

😂

[@Randomperson0467]

How long did it take to print all of these

[@justinmccurry9633]

I really want to see you spin the last gear and watch what it would do to the first one if it were possible

[@randomobbiest3893]

You cant

[@farerse]

last gear would break before you could make it to move

[@MicheleRoccapinnuzza]

It could be very dangerous. 

[@cbletl1996]

Can somebody explain what would happen if you took a really high gear ratio box (not this high though, something like several thousand to 1) and then took the same box and attached it to the end of the first but in reverse? Would you be able to spin the first gear and have the last gear spin at the same speed, or would friction or some other forces prevent that?

[@-na-nomad6247]

Use a lever and try to turn the last gear, you might need a press for that

[@MicheleRoccapinnuzza]

It could be very dangerous. 

[@-na-nomad6247]

@@MicheleRoccapinnuzza Yes, yes it could.

[@wolfthorn1]

So thats why my bike dosn't go the speed of light. I put my 200 gears in upside down.

[@grodey3985]

What if they put a really strong engine attached to the first gear and turn it on ? 💀

[@organizeandrise1728]

Next to nothing. He has a video on it.

[@XtreeM_FaiL]

Why use engine when you can easilly rotate it yourself?

[@_Tomaszeq]

3:22 Vsauce outro should be like this

[@-LAWAN]

Please do it the other way to see how fast it will spin

[@jacob.rausch]

That is literally impossible

[@-LAWAN]

@@jacob.rausch I know

[@-LAWAN]

@@jacob.rausch I know I just want to see

[@CodeBlueWiki]

@@-LAWAN a normal human being can only spin the 4th or 5th gear if they are as strong as bruce lee

[@-LAWAN]

@@CodeBlueWiki theoretically if you move it like by a nano centimeter it will spin super fast

[@russchadwell]

Make the entire floor of your garage into a gearbox.

[@garyreed2206]

If I got the math right, if you spin the first gear once per second, it would take 3.17E+161 years to spin the last gear once (I don't think the number with that many zeros has an actual name).

[@MariaNicolae]

In the Conway-Wechsler system which extends -illion naming infinitely, it's 317 duoquinquagintillion years.

[@anlev11]

1:59 DONT TOUCH THAT GEAR! IT WILL BREAK THE STRUCTURE OF REALITY!

[@chagmenlietons3606]

10 to the power of 169. That was on purpose. 😂

[@krgbrgh8603]

Shut up nigga

[@wildf1are]

If it's not too much torque, could you spin the last gear by hand? or attach lever?

[@drsatan7554]

Now make one just like this but with a low gear ratio See if you can get the last gear to break the sound barrier

[@eeveeofalltrades4780]

You can create a black hole with this

[@XtreeM_FaiL]

Why make a new? Think!

[@drsatan7554]

@@XtreeM_FaiL because this one is built one way and to build it the exact opposite would be even cooler

[@XtreeM_FaiL]

@@drsatan7554 Turn it around.

[@drsatan7554]

@@XtreeM_FaiL I don't have it but even if I did the handle would be on the wrong side

[@SpeakableYT]

Spin the last gear

[@wesleyplace5455]

Yes

[@charlesmynhier2652]

Input torque is multiplied 10 times each stage. There is a friction for each set of gears, and then there is backlash, which would be Hugh for 169 stages, after several stages the torque will be far greater than the teeth can transmit, so this gearbox can never deliver the final ratio. I would be curious to know how many stages it would take to start shearing teeth.

[@XtreeM_FaiL]

Forget the friction.

[@jani00]

It would be fun to calculate how much the last gear turns after the first has made a full turn. It should be comparable to planks length.

[@XtreeM_FaiL]

1st gear have to rotate trillons time to get close to Plank's length. No, I didn't bother to calculate that. Just a guestimation.

[@zeev]

now to the inverse toy------a 1:10 gear ratio, how fast can you get the final gear moving before it breaks apart, or something breaks!

[@skytrooper3537]

Spin the last one, I wanna see how fast it goes if it can handle it

[@Yora21]

It probably just would break, because the gear that is connected to also really doesn't want to move.

[@hillbillyjim7880]

What happens if you turn the last gear to try to turn the first gear that fast?

[@anlev11]

It would require so much force that even if you put the weight of the entire universe you wouldn't be able to turn it. Actually if you put too much force the gears will just break

[@robertidenya1432]

I would have like to see you apply some torque to the last year to see how fast the first one could spin.

[@MicheleRoccapinnuzza]

It could be very dangerous. 

[@TantalumPolytope]

@@MicheleRoccapinnuzza why the ?

[@gakbrax4947]

Spin the second gear is the same way and you’ll get a time machine if you spin it fast enough

[@dumby6483]

Spin the last one, i dare you

[@KazeKamiFooDjinn]

This is brilliant! I want to use this for the double slit experiment by adjusting wall cracks to a photons width. This could be very useful in so many experiments.

[@Kardsafox]

I want to see it turned from the last gear but I know that's impossible/ insanely hard

[@NutjobGTO]

That's quitter talk

[@ImMimicute]

I’m exactly the same, I know in theory it’s impossible but it just looks so doable and I’ve never actually interacted with a gear array like this so I lack the mechanical understanding that it’s impossible

[@grandfathernurgle283]

I mean if you could. That first gear would probably create an explosion because the atoms could no longer hold each other together.

[@TantalumPolytope]

its not insanely hard, its actually impossible

[@ImMimicute]

@@TantalumPolytope eh, it depends, if they’re 3d printed gears? Yea impossible, but with strong enough construction and enough force behind it then it is technically possible albeit theoretically

[@tombittikoffer412]

We all want to see you try to turn the hardest gear before it breaks.

[@Finian1]

imagine how fast the first gear would be spinning if you rotated the last gear

[@MicheleRoccapinnuzza]

If you turned it just one thousandth of a degree every 100,000,000,000 years, the first wheel would spin billions of billions of times faster than the speed of light.

[@FlyLeah]

@@MicheleRoccapinnuzza🤯

[@mdr3w]

At what rpm is the first gear being turned to take 25k years. How many time does the first gear need to turn to make the last move 1 time.

[@AstonishingStudios]

Wow crazy that your gear ratio, 1.0*10^169, is even bigger than 1.7*10^106

[@the213don]

So did you increase the number of teeth for each gear related to the next gear? and what is the number of teeth on the last gear?

[@stephencooper3212]

At what speed was the first gear pinning in your calculations to reach the amount of time you’ve concluded, I was curious about changing the speed.

[@scoop4363]

03NOV2022 - Back in the 1950-60s near Columbia, Tennessee, you could stop on the highway and see "Bullwinkle's Geared Monstrosity." It was made of pulleys and v-belts. Somewhere I still have a postcard from that. I've always wondered what happened to it.

[@GAMES-op1zd]

what if you rotate at least 1/1024 of the last gear, what speed would be the first one?

[@syndicated8158]

What if you used magnetic gears instead of plastic, therefore increasing the durability substantially. What is the max gear ratio you could get away with, while using a hand crank on the last gear?

[@rodrigopm13]

Hi please I'd like to know what happens or what it takes to move the "last" gear... Does the "first" would spin so fast that it would break? Or ir simply reverses and the reduction is now the other way around?

[@TantalumPolytope]

why the quotation marks?

[@TantalumPolytope]

and also he said that if he could spin the last gear the first would spin faster than the speed of light which means that yes, it would be atomized immediately

[@brentarmstrong9660]

Can you add up the amount of backlash to the final gear?

[@FrogsAreGods]

what if you spin the gear at the end would it just take to much force or would you go light speed

[@magnuswright5572]

"This gearbox has a significantly higher gear ratio than the number of atoms in the observable universe" Specifically, if every atom was actually a copy of the observable universe, the total number of atoms all together would still be lower than this gear ratio by a factor of 10,000

[@bencarignan2711]

What I want to know is, how fast could it spin if you turned it from the other end? Please attach a power drill to the opposite end and let us know how many rpms the other end spools up to. That would be a fun follow up:)

[@thefish5861]

@@TheDabEnthusiastGaming So you're saying there’s a chance?

[@alexn8345]

If you made this with 0 tolerance and you made it so that the last gear is stationary, would the first gear turn? Or better yet how much can it turn if at all?

[@muhammedkoya258]

Assuming you can put enough force, the gears would turn small amounts (within their elastic deformation range) until the return torque exerted by the last gear becomes too large and either a shaft or gear fails (plastic deformation and eventually breaking the chain). Obviously I'm making a lot of assumptions but thats the gist of it xD

[@Sy_hh]

aaaw, I wanted to see him spin the last gear. although I suspect the whole thing would break a few gears down. I think the trick would be to see how slowly you can move it to get the most gears spinning before it explodes. ;P

[@1over137]

Question: How much torque would be required to turn the "small" end and cause a 1rpm rotation in the input gear?

[@Tanka036]

I believe that amount of energy would instantaneously create a blackhole

[@60yashrajgupta98]

Last gear moves slightly Universe:Explodes

[@Doubleblade1]

Me: waiting for him to spin the last gear Him: no

[@TalRohan]

Something that is weird to think about is just how small the movement per second is...because if the high speed end is moving then the low speed one is too just so slowly you probably cant even see it under an electron microscope.

[@MK1_one]

what happend if you try to turn the last one is the first in front go fast to light speed ??

[@deepakpanmand]

Plz create a dedicated channel for this gear box and livestream it with running mode

[@lizroga3348]

I challenge you to tell me 1 utility of this machine:

[@xxtruexx2706]

I want an entire video of his old gear box spinning until the last gear spins once

[@dotknieciemgly]

Jaki jest cel budowy takich urządzeń?

[@siedliko]

Myślałem ze to będzie ciekawsze, wydrukował 170 tego i to wszystko.

[@dotknieciemgly]

@@siedliko Trudno użyć sprzętu którego efektu działania nikt nie zobaczy. Więc po co?

[@Zaros262]

For fun and to practice 3D printing gears

[@dotknieciemgly]

@@Zaros262 Fun is always good :) Regards

[@therealkohlbaker8410]

So you’re saying, if you could spin the last gear, you would have created a faster than light speed gearbox

[@stevenbeach748]

I once built a pig rotisserie doing something similar. 1725rpm motor to a final drive of 3rpm. The motor had a 2” pulley to a 12” via belt drive. On that shaft was another 2” pulley to a 10”, another 2” to another 10” and finally a 10 tooth sprocket driving a 40 tooth on the spit rod via a chain. I never did measure the torque but it was a lot.

[@sirzorg5728]

I've always wanted to see someone make an insane gear down paired to an equal gear up.

[@truthsmiles]

The reason it wouldn’t work (on this gearbox anyway) is because even with the fastest motor in the world spinning the first gear you’d die long before you could even get all of the lash (slack) out of the gear train. You’d never see the “gear up” side move at all.

[@combinesoldier1229]

What if you were to start by spinning the first gear up to speed then moving to manually spinning the second then to the third and so on? How far into the gearbox would you be able to get before the first gear fails?

[@ImMimicute]

This is exactly my question, god I wish I had one of these

[@ПавелСмык-т7ц]

Have you tried attaching a load to one side, and a generator to the other, for example, so that the load drops in 24 hours providing electricity? make a semblance of a gravitational power plant?

[@Bioassasin01]

Wait... So if you manually turn the grey one, does that mean the one on the other end is gonna go faster than the speed of sound? I think it might break though

[@AORaiMechWork]

What if we run last gear Assume that the gear is indestructible can we stack it till the first gear reach light speed

[@admiralbeez8143]

I like the rear ratio vids in reverse, where the lowest gear is turned so we can see the super fast rpm at the other end.

[@DacroyleYT]

what would happen if you rotate the last gear first

[@tsufordman]

How many light years of backlash is built in it?

[@stamatisloukas8544]

Why didn't you spin the output so we could see the gear ratio on the input?

[@igxniisan6996]

Lets do some mafhs assuming all the gears have zero mass. So.. light wave can go 186000 miles or 299337.984 km in a single second, now if each teeth of the gear is more or less 3 milimeter in base width, then the circumference of the gear is 36 cm = 0.00036 km. Thus if the gear is spinning at the speed of light then in 1 second, it will rotate roughly (299337.984 ÷ 0.00036) = *831,494,400* times.. now heat death of universe occurs after 1.7^106 years or 8.44656945×10^31 seconds so to make the last gear spin 1 time before the heat death of the universe, the first gear has to spin 10^169 times within this time period, so as each second passes the *first* gear would have to spin 10^169 ÷ 8.44656945×10^31 ≈ *1.2 × 10^199* times. If u want the rpm then we just gotta multiply this by 60 ≈ *7.1 × 10^200* RPM. How many times faster is this rpm than the speed of light? Just divide the rps (s for second) of the gear if it had to finish rotating before the heat death of universe, by the rps if it was rotating at the speed of light. That is, 1.2 × 10^199 ÷ 831,494,400 ≈ *144 × 10^188* times faster than the speed of light....

[@sourabhsharma9830]

What would happen if you rotate the last gear by hand?

[@Danny-ny1sd]

how did you make it?? do you have a video of it??

[@redaminsleven2212]

im too impatient... what happens if you spin the last gear instead of the first? do the other gears spin really fast?

[@luxxulyanite]

You can't spin the last gear because the teeth would break. Indestructible material doesn't exist. Even if it was made from titanium, applying enough force would break it.

[@VinodKumar-mt5if]

What happen when we start to rotate it backwards? That means it exceed the speed of light many times. But is this possible in this gear box to spin from other side? And how much power needed to rotate it backwards?

[@thefish5861]

It would be like Superman going faster than the speed of light to make time go backwards to save Lois!

[@danielmogos8990]

One curiosity from my side. Since it take billions of years to spin the last gear once, could you use some device of this form to save motion, if you manage to spin the last gear? Say you have some mechanical energy that you have no use, could you save it in the gearbox, so that is released over a longer period of time?

[@superturboblufer]

So is the last gear moving less than a planck length in a second? How is that possible

[@originalmplays2297]

To spin the last gear you would need the first gear to spin at the speed of light