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The 90-Degree Torque Problem
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- Published on Mar 15, 2026
- ▶️ Visit brilliant.org/... to get a 30-day free trial and 20% discount on the annual premium subscription
This video traces the engineering evolution of right-angle power transmission, from the primitive pin-and-face drives of Roman watermills to the complex split-torque systems of modern aviation.
ORIGINS OF ORTHOGONAL POWER
• First conceptualized by Roman architect Vitruvius in the 1st Century BC.
• Used a "pin-and-face" design to convert horizontal water wheel rotation to vertical millstone rotation.
• Relied on animal tallow for lubrication to mitigate high sliding friction.
THE MOVE TO IRON
• Steam power torque loads caused early wooden gears to deflect or fail, necessitating grey cast iron.
• "Mortise construction" combined iron rims with wooden cogs to dampen noise and absorb shock.
• Iron gears required rigid bedplates rather than timber framing to maintain perfect alignment.
PITCH CONE GEOMETRY
• Replaces cylinders with cones that intersect exactly where the shafts intersect.
• Matches the peripheral speed of driving and driven gears at every point from heel to toe.
• Creates "line contact" instead of point contact to increase power transmission capacity.
PRECISION MANUFACTURING
• William Gleason's 1874 Bevel Gear Planer revolutionized high-speed gear production.
• Mechanically simulated gear rolling to generate a mathematically ideal "Octoid" profile.
• Allowed bevel gears to operate at the thousands of RPM needed for internal combustion engines.
AUTOMOTIVE EVOLUTION
• Spiral Bevel gears introduced in 1913 to eliminate the "whine" of straight gears.
• Hypoid gears (1926) utilized an offset pinion to lower the driveshaft and vehicle floor.
• Extreme pressure lubricants developed to handle the sliding action of Hypoid teeth.
WORM DRIVES
• Capable of massive reduction ratios (50:1 to 100:1) in a single compact stage.
• Features "self-locking" properties where friction prevents the output from back-driving the input.
• Acts as a passive brake for safety-critical equipment like elevators.
AVIATION & SPLIT-TORQUE
• Zerol gears developed to provide spiral strength with zero spiral angle to reduce axial thrust.
• Face gear split-torque systems use a floating pinion to passively split torque 50/50.
• Allows dual engines to drive a single rotor without sensors or computer control.
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SUPPORT NEW MIND ON PATREON
/ newmind
END CREDIT CARTOON BY
Tom Sloan circusitch@circusitch
#Engineering #MechanicalEngineering #Gears #PowerTransmission #BevelGears #WormDrive #HypoidGear #AutomotiveEngineering #Aviation #Manufacturing #SteamPower #Machining #IndustrialRevolution #GleasonWorks #SpiralBevel #ZerolGears #SplitTorque #Physics #Mechanisms #TechHistory
![LEON IS MY GIGACHAD SAVIOR [RE9 2/3]](http://i.ytimg.com/vi/3yIQEMBuPuo/mqdefault.jpg)
▶Visit brilliant.org/NewMind to get a 30-day free trial and 20% discount on the annual premium subscription
i leared that stuff from playing legos
Best Brilliant ad I have seen. As a 3D printer of gears, I have to say that you made this quite solid.
I am not getting this inclination to promote brilliant beyond sponsorship. All these principles are well defined and have been for more than 50 years. An A.I. will redesign and produce perfect autocad results for manufacturing and will also be able to develop any new advances via simulation and testing. There is simply no reason for any human to learn any of the brilliant concepts.
I think you forgot to credit clock/watch makers, who encountered (and partially solved) thses problems like almost a couple centuries earlier
And I'll quote:
"Clockmakers began developing and implementing complex, theoretically driven gear tooth shapes, such as
cycloidal profiles, in the late 17th century, with significant refinement and standardization occurring throughout the 18th century ... the need for increased precision in timekeeping drove the evolution toward scientifically designed gear teeth.
Key developments in the history of complex gear tooth shapes include:
17th Century (Theoretical Foundation): The formal study of cycloidal curves for gears began around 1674, when Danish astronomer Ole Rømer suggested using cycloidal profiles for better accuracy in gear movement. Philippe de La Hire, a French mathematician, provided the first in-depth mathematical analysis of cycloidal gear teeth around 1694.
18th Century (Application and Specialization): In 1733, French engineer Charles Étienne Louis Camus published a detailed mechanical analysis of gear teeth, further solidifying the use of cycloids in clockmaking. The 18th century also saw the introduction of "wolf's teeth" (asymmetrical teeth), credited to Jean-Antoine Lépine in 1771, which provided a stronger root structure for better durability."
@bbb-y4i Some of it, perhaps, certainly not all.
16:57 It is imperative that the cylinder remains unharmed
That guy will never find peace 😂😂
My mom was a dwarf in a travelling circus in Birmingham. And my dad played the tuba at the zoo. Not all were unharmed.
I understood that reference
The cylinder feels pain and is attached to a large object
I 3D printed that mechanism lol
The title is "The 90-Degree Torque Problem" but should be "The 90-Degree Torque Solutions"
Indeed. I was expecting the video to explain why it's a special problem. Theu just said "torque by nature wants to travel in a straight line" which makes... no sense at all to me
And most things said here are about gears in general and have nothing to do with the angle
@clementm5417 The video explains all the problems with it, I don't think you were paying attention. The core problem of 90 degree torque transfer is overcoming the energy loss due to friction. All the gear designs covered in this video are specifically aimed at minimizing that energy loss.
If you don't understand the bit about torque wanting to travel in a straight line, simply spin up a gyroscope then try to rapidly turn its orientation. You should understand then. The torque vector (coming out of the axis of rotation) does not want to be redirected elsewhere. This is the same reason why a rolling tire will not fall over until it slows down. The force trying to make it fall is resisted by the torques unwillingness to change direction.
The spin of the gyroscope or other spinning object can efficiently transfer energy to something else as long as that other things torque vector is oriented in the same direction as its own. But if it's not then you rapidly start taking massive energy losses from the orientation change. A 90 degree difference is the worst case scenario.
To get an idea of how useful helical gears are, listen to a stick shift car when it goes into reverse. The forward gears are all helical or other modified teeth that are nearly silent. The way reverse is usually implemented in manual transmissions is that an additional gear is slid into the drivetrain, reversing the direction of torque. Since the gear is slid in, it has to have straight teeth. That weird whine you hear when the car backs up is how all the gears sounded before they used helical teeth.
Cool - I learned something today! My friend had a V bottom boat with straight cut gears....the gear case was SOO noisy!
Race gearboxes mostly use stright gears. Noise isn't a problem there and no axial loads make design smaller, lighter and assembly simpler and faster. I guess it's also way easier and cheaper to make, and economy of scale doen't work here, since it's relatively small market compared to road legal cars.
@Stasiek_ZabojcaInteresting! I didn't know that but it makes sense.
@Stasiek_Zabojcawhat are you talking about? Straight cut gears have a very distinct sound in cars. You can literally hear it.
@knucklesskinner253reading comprehension isn't your strong point I guess, he didn't say they were not noisy he said it wasn't a problem for race applications.
It's cool stuff like iron gears with sacrificial wooden teeth that make me appreciate simple natural solutions to problems
agreed 🧐
With spare replacement wooden teeth downtime would be minimal. I wonder what species of wood they used, some woods are quite dense...
@steveo5295 Beech wood is very hard and tough. As is hickory.
Aluminum or bronze sacrificial teeth would last even longer and they had those softer materials back then. I recently saw a video on some diesel truck engine that had gone 1 million miles and was being rebuilt for FREE because the owner made it last that long. They said the only reason it failed was because the rocker arms (allowing the valves to pivot) were made with roller bearings. But their "improved," design used a simple, Sacrificial bronze bushing. They said that when a ball bearing fails, of course you get shards of steel and the balls going everywhere, but a bronze bushing just wears and wears and wears without ever failing.
True you could use a softer metal but it wouldn't cut down on the vibration as wood does...
Twisted belts were another common solution in certain applications. still see it in conveyance a lot
Those are still scary. Especially when 20 feet long on a donkey engine or a tractor output operating a device that gives occupational health folks nightmares.
'Twisted Belts' are a great example of Topological geometry being applied to mechanical problems.
'Twisted belts' are based on the _'Mobius strip'_ that provides for internal & external surfaces to reduce wear.🙂
Absolutely:
Excellent efficiency, low noise, long lasting, almost maintance free.
I support the steam traction engine. Elon Musk your Cyber contraption cannot compete with a full decorated showground engine
@Pax--Alotin"Twisted Chain" is another option. I am using a Moebius strip based twisted chain (6mm pitch only!) on my human powered hydrofoil. The chain and the chain wheels already last for hundreds of kilometers now and they do not show any sign of wear yet.
6:39 I work at Gleason making high precision spindles. We’re still making machines to manufacture these bevel and spiral gears for companies like Mercedes Ford and Boeing today. We just hit our 160th anniversary last year.
Dang you guys have a huge CV to brag about, you're basically every single mention in the video after the steam age. Pretty daunting.
I work for an aerospace machine shop that specializes in very difficult and very large parts, and spline features are one thing that we immediately turn away because it's so specialized. You could make features like that on a high accuracy 5 axis mill, but it's going to take forever compared to dedicated gear cutting machines and it will probably have less repeatable results
Hey Rochester represent! Never worked at Gleasons but always wanted to. Doing some aerospace stuff now but I know some of the Gleason guys!
@MattyIce_254nice! Im sure we know a few of the same people.
I run three Gleason hobbers at work, two P90 and one P60, plus our GMM is Gleason too. Took a tour as well in HS as part of a machining class.
After the very informative topic You totally caught me off guard with the comic at the end 😂
Here’s a little factoid on that, the animator that made that cartoon did an animated short on Sesame Street called Teeny Little Super Guy
I just goes to show that humor and learning goes hand and hand...
Man had me wheezing
@NewMindloved that little guy back in the day! I remember that!
I own a machine shop and 20 years ago I went to a machine auction. Hughes helicopter plant in Culver city. They had a swiss made jig bore machine, like brand new. I found out it was used only to remove the last finish passes to the 90 angle gear box for the main rotor. The gear box had to hold tenths of a thousands (.0005)".
well yeah, European mahines are built to a far higher spec than US ones. 1/200th of a millimetre vs 1/5000th of an inch
@osmacarand yet the cars still break down more often
@osmacar I have no idea what they made the hole centers at. I just threw a number out.
@dosmastrify no, they don't.
@Erik-rp1hi 1/200th of a mm is something like 1/12,000th of an inch
That was absolutely first class. It's good to know the focus of your content remain these amazing mechanical engineering tales.
Yeah. Cozld dive in some mechanics of solids problems, since they are usually the hardest field of ME.... 😶
17:00
Yeah i'd definitely call that an exotic alternative for a highly specific use LMAO
You'd be better off with 2 or 3 universal joints IMO.
The Jorker 9000
That feels good.
100% my favorite right angle drive based on benis feel
The cylinder must remain unharmed.
10:11 I love that cross section visual
Helicopers are scary: In the video at 16:26 it contains 7 gears where each and every cog is a single point of failure possiblity. When I was a child the airplanes were the scary ones and the helicopers are the fun as they are just 'floating' and can land wherever you want. Now as a grown up it is the opposite. When you look at their complex mechanic systems it is like a miracle that they are not constaly falling off the sky. Kudos to their engineers and maintenance teams!
Yup, planes tend to be able to glide decently well but helicopters have to go into autorotation to be able to land in case of engine failure
Yep. Plus the planes stays in the air by its rigid wings. It is very rare for these passive structures to fail. But for helicopters they still needs working gearboxes, axles, bearings etc to rotate the two rotor even without engine powers in auto rotation mode.
Heres a dirty little secret about helicopters: they do somewhat frequently fall out of the sky.
"Lubricity."
I have a new favorite word.
The City where the girls go wild
I got a little excited when I heard the beginning of that sentence. Is he gonna say it? Yay! Nerdy words done derp cheap
@Cocolinas * golf clap *
I read a French translation of Lewis Carroll's Jabberwocky that made up the word "lubricilleux" for Carroll's "slithy", which makes as much sense as anything in that poem. I propse that by the transitivity of Latin roots, "lubricity" therefore is a perfectly cromulent synonym for "slithiness". The gears engage more slithily.
@almitydave Lewis embiggened the English language with some of the best words.
PLEASE do a video on machining, mainly the history of endmills, carbide/HSS, machines, etc.
That is way too big of a topic
if im not mistaken he already has a video on cutting tool history where he goes over things like HSS and carbide.
@aca@acasccseea4434ds like a multiple video series delving into the specifics of each machine type to me, definitely not too big of a topic
Great content! I especially enjoyed the helicopter transmission breakdown.
I often wondered how they got multiple engines on the same shaft.
Thanks again…subscribed 😊
Circular saws. An obvious seeming tool with a short history and a murky past.
I love the part where the warvel vanes effectively prevent side fumbling.
Goated reference
the key is to reduce soinusoidal repleneration...
That was eye opening. I had no idea how immense the development in the field of gears had been, especially in the last 200 years.
I love these kinds of engineering videos. Very informative.
The factorio soundtrack is highly appropriate for this video :]
I love how you bring the art of storytelling to a field that desperately needs help in that department
16:58 thats a pretty exotic alternative indeed😩
19:00 did anyone notice the last part that was kind of unexpected
where he drilled into his hole?
@SangheiliSpecOp😂
You can think of a hypoid as a spiral bevel that’s headed a little bit towards being a worm drive. It’s got a bit of sliding which reduces efficiency but is why it is quieter.
There's almost a continuous gradient between spiral bevel to worm, would be a cool math animation to show one slowly transitioning from having the input pointing directly at the axis of the output to being on a tangent.
The spiral bevel is quiet enough; that's why it's used on outboard motor and inboard/outboard gear sets which have intersecting shafts. The hypoid just lets you offset the shaft, at the cost of sliding friction and the necessity of EP oil.
6:22 Fully what?
Solid metal gears
METAL GEARS !?!!!!
2:54 Even the vocabulary of describing the mechanism is causing unbalanced friction inside my brain. Of course it could be causes by all the tactile sticky debris the world keeps trying to shove in there where I need the processing to be done. I have an entire folder file structure on wanting to get revenge on the guy or girl who called LLMs AI and forced actual AI research back 40 years. Thats like at least a few kilobytes of anger that I could have used to store better adjectives!
You do understand the companies themselves are to blame, not the public.
Release a product that makes all black people seem bad, and it sets back segregation, is it the people who believed in the lies fault, or is it the people who lied?
Lol well said
This is seriously one of the best channels on youtube.
Can't wait to see what machine learning ( the good kind, not the LLM's like chatgpt ) comes up with in the future. Having gears, pulleys, and shafts be designed by very well trained machines, based on physics and mechanical properties will be awesome. Reduced weight, reduced material, better designs that can handle more torque or speed. Throw in additive manufacturing, and we may see parts that are literally impossible to mill or lathe.
And at least for cars, As more cars become battery powered, every bit of weight reduction, and efficiency will help make these cars more efficient, smoother, and hopefully cheaper.
I think the future is most likely 3D printed parts made of some exotic mix of carbon fiber and ceramic. Some of the heaviest auto parts like brake rotors can be removed completely in favor of dynamic braking using electric motors. IF it's safe.
Tanks and World War II were often limited by the torque carrying capacity of their transmissions. German panther tanks were known to have weak transmissions Russian T 34 were driven to battle with spare transmissions strapped to the back of the tank.
Early Fordson tractors employed a spiral gear from the transmission to the rear axle drive, superior torque was realized using small HP engines of the era…however the drive was place high on the gear set well out of the lubricant flood pool, and the very low speed of rotation usual drain the oil pickup by the time the meshing occurred…this high heat developed and typically drove the operators to insulate the seating or have at least water to cool the castings or makeshift water trays or the like place over this area…many to many additional issues ensued with this design, high incidences of bucking, where the engine high speeds from low HP engines combined with high torque would pull the tractor over on the driver when lugging or encountering a load in pulling, and as mentioned this perpetuated a design adaptation of a long low fender that would impact the ground ahead of the bucking and give the operator a bit more chance of escape…ultimately this was completely redesigned and a more typical input was created closer to the lube pool and a clutch design on one side and both brake pedals on the other eliminating pedal location identification issues in an urgent event…bucking is still an issue today but roll cages and bars, and forward of axle hitch mounts resolve most of this..
This is the video i've been wanting/needing for 60 years, but did not quite know that until just now!
*Brilliant work. Bravo*
On every level your film, focus, narration, illustration, detail, closeups, context and flow are impeccable.
Lucky to live with access to such great teaching -- illuminating these revolutionary times.
THANK YOU
A comment to appease the algorithmic overlords. Didn’t realize I needed this information until you provided it. Thank you, good sir.
wow that was legit a very high qualityexplanation
I can't understand why ppl spend all day watching videos about famous actors or pop stars and other kinds of worthless mind-junk when educational videos like this one are just as abundant.
its valid to have interests other than mechanical engineering bro calm down
How is this educational? Specifically what are you going to do with this info to forward yourself? That’s what education is. If you’re not applying this info, then it’s just a factoid or at best a quirky hobby. Maybe even an interest tidbit you know.
Why don’t you spend your time on actually applied courses? There’s free college courses out there. Only look at specifically what you plan to be applicable on your workload . Anything else is a waste of your time.
Are you even smart enough to apply any of this anyway?
@justadude1477 When I was younger, I would watch videos like these of mechanisms way beyond my knowledge at the time, but I still learned fundamental ideas that helped me once I entered college. This is a good starting point, and if they don't utilize it, at least it's entertaining.
I’m with you kiddo. I’ve devoted a good deal of my spare time to the history of technology for quite a few years. Started with those things called books but when RUclips came along that was paydirt!
Love how we constantly see it come from classic to modern
16:59
I see some HIGHLY specific use cases indeed
hmmm....
7:58 - the whine comes from the changing lever, not the contact event. So the diagonal teeth are silent because they give you a constant lever.
Please label AI images. When I see a mechanism, gear train etc, I try to see how it works or what it does. The AI images and videos are nonsense in this regard. It leaves a feeling of incompleteness and a question of ignorance that is very unenjoyable. AI is here to stay and useful to demonstrate concepts but it's currently so crude I find it constantly insulting to genuine intelligence.
Ya like the gears in the thumbnail don’t match
@daleolson3506 they do match, you just can't rotate an object in your head. The gears would be reversed on the other side and would mesh with the larger gear.
@johnnymac6242hehe😂
@daleolson3506they do match...
@johnnymac6242you mean the pinion gear should go on the left in the picture and turned 180 degrees
ruclips.net/video/HkzCuijyQT4/video.htmlsi=apgYBwVHNO9cnDp9
Wow. I had no idea this was so complex! Thanks for covering this.
> Mechanical engineering
> Looks inside
> It's complex
Finally, a video worth while on RUclips. Thank you.
Pet peeve: "Casted" is not a word. The past tense of "cast" is "cast".
I call that proof of not being AI
@NewMindthats the mistake ai do
@omegarugal9283 "thats" has an apostrophe. And for that matter, I'm pretty sure "does" is the technically correct word there. Are they also mistakes AI "do"? 😁
Perfectly pendantic peeve!
The past tense of cast should be casted. Our language is filled with arbitrary and silly rules. The plural of cow is cows, horse is horses but wheat is wheat, and deer is deer. Make it make sense.
Really enjoyed the format and presentation 👍🏽
The "self-locking" feature of worm drives is called "non-backdrivable" in gearbox lingo. It may seem like a nice feature, and if used properly, can be exploited to advantage. However, the gear will backdrive under vibrational environments, and the inability to drive torque in the reverse direction means that even the tiniest drive motor can lock the input shaft, leaving any output shaft motion presented with infinite torque. In otherwords, it shears the output shaft right off, no matter how strong it is made. Machine designers know to never design a gearbox that can be torn apart by a software bug in the motor controller. Because it WILL happen. It is not a matter of if. WILL. 😢 But it is still a cool gearbox, and if implemented carefully, very useful.
fascinating
Ok ok now I can't stop thinking about roots superchargers
It seems that the final ultimate challenge for right-angle power transfer is friction. So long as there are 2 different components that interact to transfer power, there will always be power loss and wear due to friction between the 2 parts
I wonder if it's possible to use compliant mechanism to create a right-angle power transfer system. Maybe using soft-ish material like plastic with some nice compliant mechanism structures? Though that would also bring some power loss due to heat from plastic deformation.
Or liquid ;)
What if we could make two components interact without touching eachother ?
Leverage magnetism
All the gears including ones for right angle are designed with evolvent meshing in mind. That's when teeth roll around each other instead of sliding so they experience rolling friction which is orders of magnitude less. Usually to get rid of sliding completely one needs absolute precision which is impossible and sometimes high precision is not economically viable. Worm gear is exception here, it is sliding "by definition".
But in general cogs may have very good efficiency including ones for right angles. Which also means low wear and tear. Some differential on the car may last million of kilometers and more.
Well, if you were ever bored and played with that bendable straw, you know that what you just described is actually possible, but the same advantage of flexibility is also it's weakness- transmitting such huge torques required by machines would most likely de-sync the revolutions at best, and completely tear it in at worst.
And since I just had few subjects that talked about energetic principles, I now feel that it has something to do with the nature of stability and principles of least energy. Whenever we want to channel the torque/ power somewhere, usually, it is not where the minimum-energy pathway is, meaning we essentially force it to higher demandind states, meaning we produce the losses. Whenever we split simple geometry by gears/ ...., we create contact points and that leads to losses. Whenever we divert the power by different means (water in pipes, etc...), we again generate losses. That's my current understanding of it.
But great thinking! This is exactly what problem solving is about.
On the Lotus Elan (and probably a few other cars of that era) they used a rubber donut instead of cv-joints for their half-shafts. The flexing rubber would compensate for the suspension movement.
A problem I didn't know I had.
14:30 ah, yes, the turboshaft engine, adapted from the turbolift systems on federation starships. Nothing less fanciful is required to make the whirlybird function.
turboshaft was my nickname in college
I instantly recognized the music in the beginning
16:57 can this system be made with the safety of the cylindrical object in consideration? Its imperative that the cylinder remains unharmed.
What is the girth of the cylinder? 😂
That little cartoon skit at the end got me by surprise. I thought it was an ad at first lol
incredibly difficult to model these in cad software
Sarcasm?
"no you normuls dont understand"
'which part dont we understand?'
"go awayyyyyyy"
Thanks @NewMind for such an engaging episode!
10:56 No wonder diff fluid stinks.
Get in the robot
Oh, you're right - the sulphur in there.
Good thing sulphuric acid doesn't stink like rotten eggs, or lead-acid batteries would make all our car engine compartments smelly places. 😊
@dmurray2978Do I have to?
Got that fluid on shirts and even after 6 trips thru washer & hanging up outside on sunny days smell never went away.
Old timer told me back in the 1970's differential oil smelled so bad was because it was made from fish. Sulfur dies have an awful smell
Amazing video. Appreciate the efforts!!
I'm a fan of the eCVT. It would make a great vid. Just subscribed! 🎉
I second this request
@i_am_ironman3380I did see another engineering vid on it on YT, very well done!
Don't forget to check out his back-catalogue. This guy is absolutely obsessive when it comes to quality. He has covered everything from spark plugs to micro processors, and all his videos are as well executed as this one. No fluff filler. No oversimplification. Perfectly clean cut narration.
Evolution in technology to solve more and more complex problems is like magic.
6:22 Metal Gear?!
When you can’t even say my name…
solid
Kept you waiting huh?
" That's metal gear ! , ITS ALL READY ACTIVE !! "
Fantastic video. I enjoy hearing about the evolution of designs that led to what we often take for granted today.
2:06 look up the adjective of lubricity, lubricious. a match made in heaven. But I wouldnt know, because im just an a.i. computer program
Your speech is wonderfully elegant. Thank you for this blessing on my ears.
I grew up in Rochester NY, Kodak was the pretty sister, but Gleason was the older brother. To this day, Gleason makes world class products.... Still in Rochester. Kodak? Not so much.
Great video! Perfect for settling in after work on a freezing night.
Not all wormgears are selflocking.
Would you please list an exception? I don't necessarily doubt you, I just would like to know about a new to me mechanism style.
Depends on angle of worm teeth .
Ford trucks in 1950s had worm gear differentials .
True
@garethbaus5471Ford differentials in trucks 1930-50s
#notallwormgears
@garethbaus5471any worm gear with a steep enough pitch on the screw. So many multi start thread worm drives. Like wheelchair motors for instance
That was awesome. Such simple machines can multiply capability like it's nothing.
12:36 This drove me crazy the moment I saw it. I'm a woodworker, and this wobble in the board is a HUGE safety hazard. This board needs to see a planer before this cut, and possibly a jointer and then a planer.
I think it was just to show the cut.
Because the operator's hand isn't even in the shot which should be putting down pressure on the work.
So much info here on the vid and comments! So cool!
6:23 “What! *METAL GEAR?!”*
Here?
Very fascinating! Thanks for sharing!
The jorkinator 16:55
Something about cranking my worm gear
Thanks a lot for your excellent video about the gears.
Excellent video and great history of this type of gear.
after hearing about thermal expansion in helicopters it reminded me about how F1 teams this year are using thermal expansion to get a higher compression ration AFTER the piston expands. Meaning: It has a lower compression ratio at start then a higher compression ratio after it gets to temp. Pretty cool huh?
It is said to be more the conrod expansion than the piston one.
@gsbeak that's what I said it was my accent..... ;)
I had heard of a thrust bearing, didn't really understand its true purpose until this video. Thank you!
One fact that was skimmed over: hypoid gears were completely dependent on the chemical engineers coming up with a lubricant that solved their friction welding issue. The shape of them was conceived well welllll before they became practical. 😊
Wonderful presentation about gears and their evolution and design. I think that a short segment should be added on planetary gears even though your focus was on the changing of direction of torque. On the helicopter gear segment, I think that it would be helpful to indicate that the upper gear is the output shaft and the lower gear is an idler gear. Where the importance of planetary gears comes into to play is further reduction in rotational speed in the helicopter gear box.
Yeah nice vid. Interesting topic with a historical perspective. Good work
Im an IT guy and 50 years ago wrote an app for an engineering company in Melbourne Australia that setup a Gleeson Spiral Bevel Gear machine to cut gears for a cane crushing gearbox.
The Gleeson was a new machine to the company and it took the chief design engineer and his assistant 2 to 3 days to go through the three page calculations that determined a few angles and gear wheels to be used depending on size and ratio of gearing required.
The app took less than 2 seconds to do all the maths.
I was required to be present on the first run. It worked!
I'm not sure a computer program would have been referred to as an app in 1976
@fordprefect7583 fwiw app is an abb
@fordprefect7583It wouldn't have, of course. But the term has been ubiquitous for at least a decade, especially within the industry.
What kind of computer did you use?
Very interesting video! Thanks for making it!
BOY! this video really GRINDS MY GEARS!
Were your gears of solid metal? Did you feel like a big boss when it grinded? Or was it smooth like a snake?
this vid is beyond excellent. i learned a heap. thank you.
Despite having quite advanced spatial intuition, during my machine parts and mechanisms subjects 1 and 2, I had come to the conclusion that despite being better than the majority, I am still NOWHERE NEAR the level that I could visualise such complex geometries showed in this video. Mr. Gleason was truly a mad-man for achievíng such breakthroughs, even morei in his age and time.... Absolutely incredible, amazing video!
I did get dizzy making this 😂
A lot of inventions are truly mind boggling. I work with instrumentation so that's my main focus, I find it fascinating looking into the history of how pneumatic devices got invented and then changed over time to deal with their issues.
I work at modern day gleason works, and this was such a cool history lesson on top of all engineering! A coworker had to share this one the rest of the mechanical engineering group and really glad he did!
Fully Metal Gears?!
Solid desighn.
Great video. I really enjoy it. I was wondering why you didn't mention the Chevron gears.
I had to tell my ADD to chill at around the 0:30 mark due to that explanation of turning rotational force into other forms lol. The first time hearing it I just heard complete gibberish 🙈. I felt even more dumb when I realized he didn't really say anything complicated or used terms that the average person would not know. Double 🙈🙈.
Great video! Would have loved to learn more about manufacturing methods of each level of improving type of gears!
Beautifully done.
Fascinating and clearly presented. Subscribed.
cheers from a mechanical nerd in Vienna, Scott
Great video! Thanks for your hard work! :)
You are a gem. Taught me more than school.
The topics of your channel touch my soul.
haha... same here
love the precise terminology
Now I remember the reason I didn't watch it the last time. It's riddled with commercials every minute
Volume is VERY low AND muffled.
Mind blowing design achievements !
Enjoyed, never really worked with gears, but they always amazed me.
You consistently produce some of the best material I have ever seen on the history of technology and engineering. Always well-researched and excellently produced.
I have been building transmissions for a long time. Good video
I thoroughly enjoyed this video. Thanks for all you do!
i love that there are people out there that are smart enough to make videos like this. thank you for a great video.
This is all AI.
It would be nice to see something about the double enveloping worm gear manufacturing process.