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)

@LegoTechnicsRule

3 жыл бұрын

This is another way the new 28 tooth bevel gear adds more complexity to LEGO Technic. Thanks for pointing this out.

@m.agilnajib345

3 жыл бұрын

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

@TheRainHarvester

3 жыл бұрын

@@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?

@m.agilnajib345

3 жыл бұрын

@@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 :)

@TheRainHarvester

3 жыл бұрын

@@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...

@johansten7976

3 жыл бұрын

The only gap now is a 32 tooth straight (non-beveled) gear.

@ArchieHalliwell

3 жыл бұрын

(except the 14-tooth gear)

@notmuch_23

3 жыл бұрын

@@ArchieHalliwell That's an old one that was discontinued, and for good reason: it was weak. The 12-tooth bevel replaced it.

@lordofthepitiful

3 жыл бұрын

@@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.

@NFSHeld

3 жыл бұрын

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

@LegoTechnicsRule

3 жыл бұрын

With LEGO, you pay for quality over other brands.

Finally someone who understood the complex laws of lego gears !

@LegoTechnicsRule

3 жыл бұрын

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.

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!

@LegoTechnicsRule

3 жыл бұрын

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.

@ChronoGXay

3 жыл бұрын

@@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...

@jq6413

3 жыл бұрын

@@LegoTechnicsRule You can use a resin printer to make small detailed parts.

@everythingfeline7367

3 жыл бұрын

@@ChronoGXay i would assume he's also referring to structural integrity as well

@N8crafter

3 жыл бұрын

@@everythingfeline7367 structural integrity should be fine so long as you print the gear flat so the piece doesn’t shear

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

@keilafleischbein59

3 жыл бұрын

I loved those figures

@lordofthepitiful

3 жыл бұрын

Don't forget the bevel differential.

@keilafleischbein59

3 жыл бұрын

@@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

@LegoTechnicsRule

3 жыл бұрын

I will try that soon. Thanks for telling me.

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.

@MarekLewandowski_EE

3 жыл бұрын

rebrickable.com/mocs/MOC-75632/ Unless you insist on using the 140T gear ;-)

@legofreak5769

3 жыл бұрын

@@MarekLewandowski_EE yes, i dont want to use it as the face, i want the hands to be on 3 separate rings pointing inward.

@MarekLewandowski_EE

3 жыл бұрын

@@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.

And there`s also the 4 pin connections. Those can also be highly useful. Maybe for making long actuating linkages.

Very informative, thanks!

Great video!

@LegoTechnicsRule

3 жыл бұрын

I appreciate the feedback!

A 60-tooth gear with its divisors would make nearly any combination possible. 1,2,3,5,6,10,12,15,20,30, etc.

@LegoTechnicsRule

3 жыл бұрын

If I’m not mistaken, the Lego turntable is 60 teeth. However it would be nice to see a non turntable 60 tooth gear.

@m.agilnajib345

3 жыл бұрын

@@LegoTechnicsRule to my knowledge theres 3 types of turntables that I know of, 28 teeth, 56 teeth, and 60 teeth.

THIS is really useful

Great coverage!

Dude just shows some of the rarest gears explaining gear ratios

@LegoTechnicsRule

2 жыл бұрын

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.

lego is the coolest thing on the planet

@LegoTechnicsRule

Жыл бұрын

I am inclined to agree with that.

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.

whoa these kinds of videos help me a lot!

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

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.

@LegoTechnicsRule

3 жыл бұрын

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

@LegoTechnicsRule

3 жыл бұрын

Oh look who it is. The king of clock making has returned. Welcome back to my channel!

@KEvronista

3 жыл бұрын

@@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

Now we can make 50 speed transmissions

Bavel gears are supposed to transmit power perpendicular to each others, these are spur gears

@LegoTechnicsRule

2 жыл бұрын

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.

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

Real men use technic axel/pins as gears

Some day they might even bother their arses to make a 32T gear.

@minerman60101

3 жыл бұрын

Or a 44T gear

Bevel Gear Sold

Where I buy all these technic gear

@LegoTechnicsRule

2 жыл бұрын

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 KZread tutorials on how to use it. Trust me, don’t go to ebay you will pay so much more for the same stuff.

2:45 thats not the biggest gear of lego technic btw cool video i have those gears to :)

@bibasik7

3 жыл бұрын

It's the biggest normal gear. The only ones that are bigger are turntables, which don't really count.

@dinhtuan752

2 жыл бұрын

60t

Lego technic makes me think of Bionicle and Mindstorms. I miss Bionicle.

@LegoTechnicsRule

2 жыл бұрын

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.

finally, *7*

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.

@LegoTechnicsRule

3 жыл бұрын

If you didn’t, be sure to buy them from bricklink with the shipper being in your home country.

@chrismofer

3 жыл бұрын

@@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 :)

Yes, all of this is how gears work.

@Jarrbitt

3 жыл бұрын

yes, and now you can do more with lego gears :)

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.

@LegoTechnicsRule

3 жыл бұрын

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?

@TinkeringJohn

3 жыл бұрын

@@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.

@m.agilnajib345

3 жыл бұрын

@@LegoTechnicsRule both are acceptable, mathematically correct

*2019*

I don’t even have any Legos. The hell am I watching this for?

@LegoTechnicsRule

2 жыл бұрын

Maybe you should get into Lego. It’s a good time killer plus you learn valuable STEM skills while doing so.

@catzzzz1450

2 жыл бұрын

Then why are you watching this?

Where did u get that peice from?

@LegoTechnicsRule

2 жыл бұрын

I personally got mine from bricklink.com

So basically this is a god gear

@LegoTechnicsRule

3 жыл бұрын

Not necessarily. It just opens up a bunch of new possibilities.

WOW when did Lego make a 24 tooth gear?

I have that gear, but i dont know how to make a crane for my Harbor/Navy base City. Any suggestions?

@LegoTechnicsRule

3 жыл бұрын

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.

@dinhtuan752

2 жыл бұрын

RESULTS: 42108, 42082, 42044, 42009 ECT.

You sound like, or your sound reminds me from that one kid with glasses from *_The Polar Express_* animation movie:D

What's the difference between beveled gears and normal ones

@LegoTechnicsRule

3 жыл бұрын

The beveled ones can transfer rotation at 90 degree angles. Technically, you can use them to transfer rotation at any angle 0-90 degrees.

Why is that worm gear setup "cheating"? Looks legit to me

What does beveled mean?

@LegoTechnicsRule

3 жыл бұрын

If a gear is beveled, the edges of its teeth are at an angle, and thus allowing the rotation to be transferred at angles.

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.

@LegoTechnicsRule

2 жыл бұрын

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

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

@LegoTechnicsRule

2 жыл бұрын

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.

@catzzzz1450

2 жыл бұрын

@@LegoTechnicsRule 😦

This gear is also found in the SPIKE PRIME LEGO Set

@massimookissed1023

3 жыл бұрын

4:31

@bramvanzuilen8960

3 жыл бұрын

@@massimookissed1023 the gear is in some sets of mindstorms ev4 but not the set he showed in the video

@dinhtuan752

2 жыл бұрын

this one not include the 28t gear, just a new diff.

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.

@LegoTechnicsRule

3 жыл бұрын

The knob gear is technically a 4 tooth gear, but agreed.

@notmuch_23

3 жыл бұрын

I don't count it as a proper Lego gear if it cannot mesh with any other Lego gears.

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.

@wolfelkan8183

3 жыл бұрын

Edit, I guess you could also use the enormous 140-tooth wheel.

@LegoTechnicsRule

3 жыл бұрын

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.

McLovin is that you?

@LegoTechnicsRule

3 жыл бұрын

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.

@LegoTechnicsRule

3 жыл бұрын

That’s the fun of building the machines though...

So lego is Knex now?

There isn't a 28 tooth gear only the diff

@LegoTechnicsRule

3 жыл бұрын

That’s the beauty of it. There is! Not many people know about it and that’s why I made a video on it.

@dinhtuan752

2 жыл бұрын

I found the comparison video by Anton: (kzread.info/dash/bejne/lnWnu6eJqKquhco.html)

he say "42 teeth"?

32 tooth gear when ?

@LegoTechnicsRule

3 жыл бұрын

Only time will tell.

As a non technique lego fan, I still don't get what it revolutionizes, but OK, good for you 👍

@LegoTechnicsRule

3 жыл бұрын

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.

slack ?

Hey Sariel I don't watch this one instead Sariel upload this one to complete the radios including banana gear racks .

@LegoTechnicsRule

3 жыл бұрын

I’m not Sariel. However, he did make a video on this part too.

@tuankiettran8811

3 жыл бұрын

@@LegoTechnicsRule ok

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...

3d print lol

Isn't the biggest Lego gear that big green one from the power miners?

@LegoTechnicsRule

3 жыл бұрын

If I’m not mistaken, the halifire droid wheel is bigger.

@SupersuMC

3 жыл бұрын

@@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.)

@LegoTechnicsRule

3 жыл бұрын

@@SupersuMC Yes, the bucket wheel excavator had some of those in it, but the halifire droid wheel is still bigger.

Technics ruined Lego for me as the parts broke so easy such a shame after a childhood full of Lego

@LegoTechnicsRule

3 жыл бұрын

Broke so easily? I’ve never broken a technic part ever and I’ve put them under quite a load.

@craigbeas6111

3 жыл бұрын

@@LegoTechnicsRule the joints were terrible such a shame all that love ruined

First

Clickbait.

@LegoTechnicsRule

3 жыл бұрын

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.”

Bro buy some lotion

Lost 5min.