This brand new LEGO part REVOLUTIONIZES Technic Building [HD]
ฝัง
- เผยแพร่เมื่อ 6 มิ.ย. 2024
- In 2018, LEGO released a new gear, first seen in technic sets in 2020. This hasn't happened for over 16 years! I present to you, the LEGO 28 tooth bevel gear. One of the most useful new lego parts 2021.
In this video, I explain some cool facts about this new part and all the different ratios you can make with it, including the worm gear and the normal, non-beveled gears. I used lots of color in this project so you could see the individual parts well.
I wasn't able to say much about gear ratios because I just didn't have enough footage, so I might as well explain them here. For those who don't know what a gear ratio is, it is basically how fast/slow a gear turns another. The example I used in the video was a 1:3 gear ratio. Say you have a gear with 10 teeth and another with 30. If you completely rotate the first gear once, the 30 tooth gear would have rotated 1/3 of a turn. Gear ratios also work backwards. If you completely rotated the second gear, the 10 tooth gear would have made 3 complete rotations. Gear ratios can also be expressed with a decimal over the number 1. Take the gear ratio 2:3 for example. For every 2 turns of the first gear, you would get 3 turns on the second. You can simplify 2:3 further by dividing its first number by the second. 2 divided by 3 is 0.666:1, basically 2/3:1. For every 2/3 turn, the second gear would rotate once. I apologize if I explained this confusingly, but if you want more information, just google "Gear Ratio" and you will get lots.
Intro: 0:00
Gear Ratio Explanation: 0:55
Bevel Gear Combination Examples: 1:11
Normal Gear Combination Examples: 2:00
Worm Gear: 2:56
14 Tooth Gear Combination Example: 3:10
So what!? There's more: 3:25
More Info(such as sets it appears in):4:04
Outro: 4:36
#LEGO #LegoGear #LegoNews
Background music:
Everlasting - Ephixa & Jim Yosef [NCS Release] - บันเทิง
Fun fact: you can change gear ratio without changing center to center distance as long as the sum of the teeth on both gears remains constant and tooth geometry is the same. Example: 20:20 center to center is same as 16:24, or 12:28, or 8:32. All of those cases total of 40 teeth. This is because number of teeth is a surrogate for circumference, which is a multiple of radius, if center to center, r+R is constant, so is 2pi(r)+2pi(R)
This is another way the new 28 tooth bevel gear adds more complexity to LEGO Technic. Thanks for pointing this out.
Anyway, have you tried the formula for total distance in studs or lego holes (axle to axle) of any meshing of any 2 gear (not by beveling); it would be: (number of teeth first gear + numbet of teeth second gear)/16 + 1.
Example, for 8 tooth gears meshing with 8 tooth gears: (8+8)/16 + 1= 1+1= 2. So total distance from axle to axle is 2. You make a whole matrix in excel for all distances of all gear combinations. I made one some years ago :D hope it helps
@@m.agilnajib345 but the distance isn't 2. It's 1. There are two holes with a distance of one between them. Or am I misunderstanding?
@@TheRainHarvester ah my bad. I think its just a consensus/definition thing.
Let me explain, for example I want to mesh a 8T gear with 8T gear, it turns out it we will need a total of 2 holes side by side to mesh them together. It turns out a formula can be derived to obtaining the total holes needed to mesh any 2 gears. Hence, my formula will yield the value 2, ((8+8)/16+1). So thes formula is for "total holes needed".
It is also correct to say the distance for meshing 8T gear + 8T gear is 1, this is if we are calculating distance from middle of the first axle to middle of the second axle (1/2 hole plus 1/2 hole equals 1). So It depends on the consensus. The formula for calculating this (i.e. distance of gears, center-to-center) would be (8+8)/16 = 1.
I think the basic formula still holds, proven by the example above, I admit the definitons were not explained clearly the first time. I hope this is clear enough :).
Personally I like the total-holes method, but to each their own :)
@@m.agilnajib345 either way works for me.
But is that in imperial units or metric? Haha jk.
That moment when you realize that Lego makes gears in multiples of 4 teeth...
The only gap now is a 32 tooth straight (non-beveled) gear.
(except the 14-tooth gear)
@@ArchieHalliwell That's an old one that was discontinued, and for good reason: it was weak. The 12-tooth bevel replaced it.
@@ArchieHalliwell One lego stud is 8mm. Lego gears use a module1 tooth profile, which can be understood as having 1 tooth per mm diameter, or 8 teeth per stud diameter. For Lego gears to have tidy distances between centers, they should come in increments of half-stud sizing, or 4 teeth. 14 teeth is anomalous, and is an old part from when they didn't quite have their system figured out.
The reason is that the gears are to be put on a cross axle, which has 90° rotational symmetry. On a fixed cross axle position (like + or x), you can stick the gear on in 4 different rotations, each 90° apart. So the gear needs to have (gear-wise) rotational symmetry of 90° to have the teeth be positioned always the same no matter the rotation. This requires the tooth count to be a multiple of 4.
There once was a gear with 14 teeth, which was perfect to make two synchronously counter-rotating cross axles, where both axles started in the perfect + position. Alas, this is not achievable anymore with two gears that have a 90° rotational symmetry, now if one axle is +, the other will always be tilted a little.
And that excavator set is 450 dollars ...man and I thought my childhood was expensive
With LEGO, you pay for quality over other brands.
The moment when you remembered that Tinkercad has a gear Shape Generator, and you could have made 19-tooth gears and 3D-printed them whenever you wanted to instead of wait on Lego... Oh, wait- I did!
I’ve heard of people doing that, but the experience I have with 3D printed parts with small details is that they don’t turn out well. However I guess it depends on the quality of the printer.
@@LegoTechnicsRule I’m using an Ender 3 Pro, the total time I’ve spent printing anything is under 12-hrs, and my custom gears are turning out perfectly fine...
@@LegoTechnicsRule You can use a resin printer to make small detailed parts.
@@ChronoGXay i would assume he's also referring to structural integrity as well
@@everythingfeline7367 structural integrity should be fine so long as you print the gear flat so the piece doesn’t shear
Finally someone who understood the complex laws of lego gears !
Thanks! I have only a basic knowledge of gears. However, there is so much more to learn about gears than just ratios such as pitch, tooth depth, and the load of trigonometry that comes with it.
Lego "technically" had 2 gear-based parts that has the same ratio, but they are not a full gear: the rahkshii shoulder piece, and the matoran shoulder piece. Even I wondered what took them so long
I loved those figures
Don't forget the bevel differential.
@@aidancommenting to move the arms when you spin a back wheel
You should be able to use the 14-tooth gears as spacers for the worm gear, as they are slightly smaller than a half-size bushing
I will try that soon. Thanks for telling me.
And there`s also the 4 pin connections. Those can also be highly useful. Maybe for making long actuating linkages.
im most excited for meshing with the big 140 tooth ring gear for a 5:1 ratio. which means i'll be able to make a clock without a crazy way to eliminate the 7 factor of the ring.
rebrickable.com/mocs/MOC-75632/
Unless you insist on using the 140T gear ;-)
@@MarekLewandowski_EE yes, i dont want to use it as the face, i want the hands to be on 3 separate rings pointing inward.
@@legofreak5769 I did it once for the outermost hand based on four banana gears coupled together... The other two hands were traditional though
My great great great grandfather waited, many generations before him as well. So, it took Lego over 300 years to produce this piece.
Very informative, thanks!
A 60-tooth gear with its divisors would make nearly any combination possible. 1,2,3,5,6,10,12,15,20,30, etc.
If I’m not mistaken, the Lego turntable is 60 teeth. However it would be nice to see a non turntable 60 tooth gear.
@@LegoTechnicsRule to my knowledge theres 3 types of turntables that I know of, 28 teeth, 56 teeth, and 60 teeth.
Great video!
I appreciate the feedback!
whoa these kinds of videos help me a lot!
Great coverage!
Now we can make 50 speed transmissions
THIS is really useful
Oh man thank you so much for this video brother I really appreciate it I literally boggled my mind for three nights straight trying to figure out a simple gear ratio and ended up getting it in a fluke
Formula for calculating distance in studs or technic holes (axle to axle) of meshing of any 2 gear (not by beveling); it would be: (number of teeth first gear + numbet of teeth second gear)/16 + 1.
Example, for 8 tooth gears meshing with 8 tooth gears: (8+8)/16 + 1= 1+1= 2. So total distance from axle to axle is 2. You make a whole matrix in excel for all distances of all gear combinations.
I made one some years ago :D hope it helps.
I think this is the only LEGO gear with a tooth count that is multiple of 7, besides that funky little 14-tooth one?
EDIT: Or well, apparently a funky 140 tooth ring gear.
Dude just shows some of the rarest gears explaining gear ratios
You must be a die hard Lego fan to know that. Anyway, I used lots of colors in this to make it easy for the viewer to differentiate between the different pieces, allowing them to see the gears mesh easier.
i'm gonna save up money and start buying all those technics sets I couldn't get as a child but drooled over every time I went to the toy store.
Best part is once you get bored of them you can take them apart to build other stuff. (Obviously, but true.)
there's one more ratio: 4 to 28. a bare axle will drive a 28t gear, but it doesn't work as well in the other direction.
KEvron
Oh look who it is. The king of clock making has returned. Welcome back to my channel!
@@LegoTechnicsRule
that's nice of you, but there are several lego clockmakers on youtube whose works i consider to be far superior to mine. check out David Ziemkiewicz, Darrell Aldrich and Kei Abe for some next-level stuff.
KEvron
lego is the coolest thing on the planet
I am inclined to agree with that.
Real men use technic axel/pins as gears
Question, I read that the best number of teeth would be a prime, with the best gear combinations being a prime-prime combination, because the same teeth would only meet every prime1 * prime2 revolutions, which in turn causes less wear. Shouldn't we be striving for an overhaul of gears, all with prime numbered teeth, then? I suppose you can't just throw a "prime-cog" now because the tooth spacing would either be different to accomodate to the stud system, or if you keep the spacing then the "prime-cog" won't fit the system (at least not without chains).
just ordered a handful of these 28s for the 62821 bevel differentials, I need 1:1 or 2:1 outputs for diffs to use them mathematically with little acceptable backlash. the new triple gear diff uses a hollow 28 as well. very nice unit but spendy.
If you didn’t, be sure to buy them from bricklink with the shipper being in your home country.
@@LegoTechnicsRule thanks for the tip, I actually ebayed them but probably paid a premium compared to bricklink. I'll definitely be going there next time :)
As a math nerd i got really excited when you said it was 28 tooth because that means people can use this to get a 7 into a gear ratio now, none of the other ones (except for the small 14 tooth) would add 7 and it's prime, meaning you couldn't combine to get it
Where I buy all these technic gear
BrickLink.com is by far the best place to find LEGO parts. Although it’s pretty hard to use for the first time user, there are TH-cam tutorials on how to use it. Trust me, don’t go to ebay you will pay so much more for the same stuff.
Bavel gears are supposed to transmit power perpendicular to each others, these are spur gears
These can transfer rotational power perpendicular to another bevel gear. What I was trying to show in this video are the new ratios and gap crossing potentials allowed by this new gear.
When you demonstrated the 1 to 3 gear ratio, you should have turned the big gear 1 turn to show that the small gear makes 3 turns. You demonstrated a 1 to .3333 gear ratio.
I probably should have showed the inverse ratio. However, 3 to 1 is the same 1 to 0.3333. Aren’t both of those ways acceptable?
@@LegoTechnicsRule It's easier to see gears make complete turns (especially if you use a marker for better visual reference) Demonstrating a 3 to 1 ratio would work too, but you wouldn't just turn the big gear a 3rd of a turn to show the small gear makes 1 turn. How do you demonstrate, say, a 5:7 or 7:5 ratio? Just saying. Still a great video. I am currently working on a Lego Allison automobile transmission using the large ring gears like the ones used in the bucket wheel excavator. I have a working model built. I'm now working out some kinks in it to make it work smoother and clean up the looks of the supporting framework.
@@LegoTechnicsRule both are acceptable, mathematically correct
I have that gear, but i dont know how to make a crane for my Harbor/Navy base City. Any suggestions?
You don’t need to use that gear specifically to build a crane. There are Lego technic cranes that you can download their instructions for and build them that way. Just search Lego technic crane, click on a link that takes you directly to lego’s website. Scroll down and you should find downloadable instructions.
RESULTS: 42108, 42082, 42044, 42009 ECT.
Where did u get that peice from?
I personally got mine from bricklink.com
What's the difference between beveled gears and normal ones
The beveled ones can transfer rotation at 90 degree angles. Technically, you can use them to transfer rotation at any angle 0-90 degrees.
Some day they might even bother their arses to make a 32T gear.
Or a 44T gear
2:45 thats not the biggest gear of lego technic btw cool video i have those gears to :)
It's the biggest normal gear. The only ones that are bigger are turntables, which don't really count.
60t
finally, *7*
Yes, all of this is how gears work.
yes, and now you can do more with lego gears :)
Bevel Gear Sold
How can I tell I have technic pieces if I’m newly learning…I have bulk Lego and technic is confusing to know if it is.
There are a few kinds of Lego building, mainly traditional and technic. Traditional building parts are your average bricks, slopes, tiles, etc. Technic building uses those beams with holes in them along with all kinds of connector pegs. This link from bricklink’s parts catalog will help you immensely. Any entry with ‘Technic’ beside it is, well, technic Lego. www.bricklink.com/catalogTree.asp?itemType=P
*2019*
Lego technic makes me think of Bionicle and Mindstorms.
I miss Bionicle.
Mindstorms still exists as Lego Mindstorms robot inventor. With the recent discontinuation of EV3, people are scalping them on eBay just like graphics cards, drastically overcharging for EV3 motors and sensors. The same is happening with power functions. You can still find nxt sets available everywhere for cheap though and rcx for even cheaper.
3:44, the on-screen text is wrong. Unless you use the 14-tooth gear (which has now been discontinued) it is _not_ possible to achieve a 7:5 gear train without the new 28-tooth gear. You can get close, but without a gear with a number of teeth that's a multiple of 7, it will never be exact.
Edit, I guess you could also use the enormous 140-tooth wheel.
Yeah, I wasn’t sure you could, and I just said probably. What I was demonstrating there is just proof of concept. I was trying to show that this new gear could create new(or existing) ratios that could cross a given distance with just 2 gears, not achievable before.
WOW when did Lego make a 24 tooth gear?
What does beveled mean?
If a gear is beveled, the edges of its teeth are at an angle, and thus allowing the rotation to be transferred at angles.
You sound like, or your sound reminds me from that one kid with glasses from *_The Polar Express_* animation movie:D
Why is that worm gear setup "cheating"? Looks legit to me
I don’t even have any Legos.
The hell am I watching this for?
Maybe you should get into Lego. It’s a good time killer plus you learn valuable STEM skills while doing so.
Then why are you watching this?
If modern Lego gears increase in size by 4 teeth, we are missing the 4, 32, 44, 48, 56, and non-turntable 60-tooth gears. I picture the 4-tooth to be a 4-start worm gear, probably the diameter of the 20 or 24.
The knob gear is technically a 4 tooth gear, but agreed.
I don't count it as a proper Lego gear if it cannot mesh with any other Lego gears.
This gear is also found in the SPIKE PRIME LEGO Set
4:31
@@massimookissed1023 the gear is in some sets of mindstorms ev4 but not the set he showed in the video
this one not include the 28t gear, just a new diff.
So basically this is a god gear
Not necessarily. It just opens up a bunch of new possibilities.
0:47
1. That blue worm gear is ine of the rarest Lego Technic gears
2. You have to use 1 stud long worm gear not 2 stud long worm gear,otherwirse it wont fit in place
2. That may be true, however I did kinda cheat the system by using axles to partially extend the worm hear holder to make it fit.
@@LegoTechnicsRule 😦
So lego is Knex now?
McLovin is that you?
No, but he’s my cousin.
I love these LEGO machines. But I don’t want to spend a month putting one together. Somebody should build about twenty different LEGO machines, and sell them already finished.
That’s the fun of building the machines though...
As a non technique lego fan, I still don't get what it revolutionizes, but OK, good for you 👍
New gear ratios. Or existing gear ratios that can cross a gap with a certain number of studs that could not be crossed before. And really, that’s about it, but it’s pretty significant.
There isn't a 28 tooth gear only the diff
That’s the beauty of it. There is! Not many people know about it and that’s why I made a video on it.
I found the comparison video by Anton: (th-cam.com/video/dAsYEPxGHUg/w-d-xo.html)
he say "42 teeth"?
Isn't the biggest Lego gear that big green one from the power miners?
If I’m not mistaken, the halifire droid wheel is bigger.
@@LegoTechnicsRule Don't they have one in that giant excavator set that is 4 parts with teeth on the inside? (I know it's not a single piece, but it still counts if you ask me.)
@@SupersuMC Yes, the bucket wheel excavator had some of those in it, but the halifire droid wheel is still bigger.
32 tooth gear when ?
Only time will tell.
Hey Sariel I don't watch this one instead Sariel upload this one to complete the radios including banana gear racks .
I’m not Sariel. However, he did make a video on this part too.
@@LegoTechnicsRule ok
slack
?
3d print lol
Horrible gear. This work not really good. The old gears have real thread angle. Very smooth. This new bevel gears used in a row produce high friction and are sluggish to operate...
Technics ruined Lego for me as the parts broke so easy such a shame after a childhood full of Lego
Broke so easily? I’ve never broken a technic part ever and I’ve put them under quite a load.
@@LegoTechnicsRule the joints were terrible such a shame all that love ruined
First
Clickbait.
I was tempted to blur out the gear, but I decided otherwise because I don’t want to be seen as a clickbaiter. When I was doing the voiceovers, blurring the gear was my original plan and that’s why I said “sorry for the clickbait thumbnail.”
Lost 5min.
Bro buy some lotion