Its worth mentioning that, when using right combination of tooth size, helix angle and gear width, you can have helix (or herringbone) gear that has smooth continuous transfer of power (next tooth engages before last one disengages), which greatly increases resistance to tooth stripping.

The quality of this video is absolutely superb - super clear explanation, great animations and real 3D-printed examples too. It must have been a ton of work. Thank you.

45 degree helical pinions can also drive a gear with a perpendicular axis. Generally spur gears can be made lighter and handle higher torque due to the even tooth loading. Both herringbone and helical gears tend to spall and crack at the initial loading point so they aren’t well suited to high torque applications. You can still use them, but you generally need an additional stage to reduce the tooth loading on any individual gear

I would consider this video the definitive hobby maker gear guide. It even includes a brief CAD tutorial

Excellent job all-round: the shooting and editing, the flow of the video, the engaging presentations and explanations, all the prints that matched the context being presented, and your clear and concise way of sharing your experience, which is extremely valuable to other makers. Please, keep up the great work!

mate i litterally searched for the reason of that transmission sound difference but couldnt found it. Thanks to you i know it now amazing video

Depending on the dimensions of the helical gear more than one tooth will be in contact all the times compared to the spour gear where only one pair is active. This is what causes them to be smoother since there's no impact as the next tooth engages.

Great video ! Keep up the good work ! I wonder if some kind of spline shaft would be better than square , you could have a shaft that has a couple splines on top and bottom and flat sides so it would still be easy to print.

I'm very new at 3d printing, and your video has been very helpful. Thank you.

Very informative video and well-explained! Great work

What about printing the double helical gear as two gears? This would make easy to print and assemble. This would allow you to push them together on the axel, and if the angles are right, forces would push them together during working (or you can glue them together too).

Great vid & presentation...Thank you! Just bought a printer (Flashforge Adventurer 3 Pro at a decent discount) and A*todesk 360 is an excellent solid modeler, very much like SWorks. I love that 3D printing doesn't break the bank, at least for a beginner.

Great video. Thank you very much! Could you share what plug in you use to create the helical gears?

This is an outstanding video. Well done and thank you. You have earned yourself a new subscriber.

You can print two helical gears and then pin them together using small bolts if assembly is an issue.

Very interesting! Good explanation! Thank you :)

You failed to mention that the french car manufacturer Citroën chose their logo to synbolise helical gears as a key innovation in their gearboxes in the 1920s

You deserve more subscribers. Excellent educational video. 👍

Loved it. Don't give up, you make awesome videos!!

It would be interesting to see you revisiting the press project. But without the press-channel kind of experimental theme. But instead to see if you can make an actually usable metal bender with enough force to actually be able to make metal parts. Judging by the actuator you made being able to lift almost 100kg while using those tiny gears. You might be able to produce a ton of pressure (maybe literally) if you really went overboard with it.

The video I wish to comment ) Thank you for this useful explanation - easy about important. Now I know little bit more about gears.

Sehr informatives Video und gut erklärt! Gute Arbeit

Very instructive. Thanks. What about backslash (by design)? I need three gears that will never complete one turn, but will go back and forth, precision is paramount.

My mind is a little blown because I'm not much of an engineer, but I definitely see the advantage of the heringbone gear. 😁👋💖

Hi, what software do you recommend to generate tooth shape? I use Alibre design for 3D modeling but according my knowledge there is no option to generate the tooth shape. Nice video.

That was very informative!

Regardless of the type of gear you still need a bearing that can absorb thrust. Spur gear needs to be designed to have thrust in a known direction to prevent hunting and provide loading on the thrust bearing.

Excellent and thank you!!!

Me: "I wonder how he designed those herringbone gears in CAD. They look difficult" Resetman: "And here's how I did these in 2 buttons."

Nice video. What software you use for animation? Is that solidworks

Hello, what is the best and affordable program for calculating and drawing herringbone gears. I use Solidworks very freely, but in it the drawing tools are very difficult, even impossible in the standard package. Thanks for all information in video! Its really helpful.

This video was so much fun to watch.

The angle of rotation of the tooth "beta" is chosen so that two teeth are engaged. This is enough to reduce noise. The rest is decided by other gear parameters.

Would it be worth trying to print two thin helical gears that are mirror images, so you can assemble the item and then fasten the gears into a herringbone with hardware or adhesive?

short, informative, straight to the point. yep. this is quality content right here

Very useful! Thanks for the video. You have my sub

I use a combination of herringbone, straight and helical gears in my projects depending on the demands of the mechanism.

Thank, dude, for this information

Great video. In the hotrod world, straight cut gears are the strongest, but that's steel. Plastic has it's own concerns. Lubricating plastic gears is essential.

Good, consise info. I have a 10krpm motor I'm trying to bring down to 500rpm. I'll try your 1.2mod herringbone concept. Thank you.

Personal Self Notes: - spur gear: cheap & easy to make, sudden contact: Noisy ( slightly higher efficiency because of helical gear always want to slide sideways creating more hear thus more power loss ) - Helical Gear: gradual engagement: quieter, less vibrating and more smoothly especially at high speed but suffers extra axial force because of inclined teeth, ( helix angle ↑: axial force ↑) recommended angle: 25 degree - Herringbone: (R.Helix & L.Helix) eliminating axial forces 6:04 downside hard to assemble

Creative video, thanks for sharing :)

Thinking about it I feel like all of those gears are useful in different situations.

A couple dB difference is actually a lot since it is a logarithmic scale. My car has helical gears for reverse…no whine in reverse; I have had cars which did whine in reverse.

As I understand, some racing gearboxes use straight-cut gears rather than helical, which is done to make them stronger, from what I understand. I don't know why this is, but I would guess that the teeth being loaded across the entire surface at once reduces the possibility of a tooth starting to shear off at one end.

hi! nice video. how you did the helical gear button appear?? there's something to import to fusion??? idk if its a joke or if its really a button, would be great if someone help me with this.

Hi, did you know that Citroën car maker logo origin was that herringbone gear?

Great video. But one question. Which Extension/Plugin are you using in Fusion 360 for generating the gears?

I always struggle with herringbone because they are impossible to slide together which means my model needs to consider this throughout its design. I end up making a strong gear with a case that is inherently weaker. It’s easy to have helical eventually rubbing on the housing in a tight design due to axial thrust. Even when it’s held in place that axial thrust is a twisting force trying to bend the gear and axle. I generally end up using a straight cut and deal with a little extra noise in a model I play with for 30 minutes and never touch again. 😂

Can you test involute vs non involute engagement ? That’s one interesting topic. But not only discus it actually test it.

Good and informative. Can never underestimate production costs though.

Another great job. A unique piece, lots of style and lots of creativity ... Thanks for sharing. (promotion) :-)

Great video.

@Retsetman, You use in video on gears Pla plastic?

which plugin do you use to create the gears?

I believe you just touched on the issue with herringbone and double helical gears, that being they cannot be disengaged by sliding action. As a result they are continuously driven. In your video you show each tooth engaging at the outer edges first, then proceeding to the center point. If these gears were tightly meshed this means the point could entrap air or worse, lubricant, creating 'hydraulic lock'. As liquids are relatively incompressible (not compressible), this would force the gears and their shafts to separate causing excessive wear. This is why herringbone gears are typically unidirectional turning, as to mesh the points first. The double helical gears are used where bidirectional meshing is required (rotating in both directions), as 'hydraulic lock' is relieved through the central gap when turning as to mesh at the edges first. So the central gap need not be large to relive this pressure. The axial thrust developed be single helical gear meshing can be countered with thrust bearings. So thrust bearings for double helical or herringbone gear meshing requires two thrust bearings, complicating design and assembly.

which program do you use to project 3d prints?

This is video is really good quality so i will subscribe for more

Wait, althought the helical gear has less vibration, wouldnt its small initial surface area contact increase the chance of damage?

I'm wondering what 3D modeling software do you use?

Here are a few fun facts: • Spur gears were one of the reasons German tanks had that much of a tendency to break down during WW2. Because if you move _a friggin tank,_ and you use spur gears, the entire force will basically hit a single tooth, it will not spread out in any way, which lead to broken gear teeth - and broken transmissions. U.S. tanks had helical gears, and their transmissions were much more reliable, besides running much smoother. • Herringbone gears are indeed amazing. So amazing in fact, that French car manufacturer Citroën derived its logo from it.

Thanks you hocam çok başarılı bir video

Are you use pla or abs or pteg for print these gears ?

Great video

What is the name of the software that you use to create the gear?

If you print the annulus in two parts it may be easier to use herringbone teeth in a planetary gearbox.

what's the name of the program you use to design theese? :O

Very nice vid!

if you printed the gears diagonally vs straight on, would it make them stronger?

Increase the center distance (a little) and you will be happy. It will be interesting to know how much the noise changes...

what layer height? do you find thicker layers are stronger?

Just came here to comment: the gears in the preview thumbnail look delicious 😋

Touring cars use straight gears due to noise not being a problem and needing quick engagement

But there's an issue with the chevron pattern. Citroen bouhgt the pattern from a Polish Engineer, hence their logo. That's not the issue. The issue is that unlike common helical gears, you can't make a gearbox change speed by simply sliding the gears. You first need to desegage them, then put them back into position. So it is really cool if you have a direct drive system, (probably with an electric motor), but changing gears with this sytem can easily get quite complicated, in case you'd have a gearbox with variable speeds. Which is often the case on actual vehicles. ANyway, nice video, thank you :)

i expect to also see the curved teeth gear (very similiar to angled teeth gear) but i guess there isnt that big of a difference from just angled teeth

Is there a way to know what size is best, say for a 1 inch diameter gear, 10 teeth, 20 teeth or 30 teeth. With more and smaller toothed gear, there would be more teeth contact, but with less, each tooth would have more surface and thicker. I would think this may change depending on if they are run at high or a slower speed, 300 rpm or 1500 rpm. Maybe a vid on this? Also, I find planetary gears real interesting and would also be a good video. Thanks for you videos.

Great!!!! Thanks

What software do you use

What if a herringbone and spur gear are combined? So in the middle the portion is straight.

Which software did you use?

Put to oppisite helical gears on 1 hearing bone gear ?

Some cars have reverse gears as helical and thus there is no sound even on reversing. I have such a car :)

Ye gear khape milege sir ji

What cad software do you use? Autodesk inventor doesnt have a gear tool

Btw, the third type was invented by Andre Citroen, so you can see literally it on Citroen logo

What software is used to design？

What's this software you're using?

how to make a 270 degrees rotation gear?

Does he have any projects with stl files so I can do them?

kaliteli bir video olmuş emeğine sağlık. türkçe versiyonunu yapmayı düşünüyormusunuz ?

So, what do you want to say? Where is endurance tests? Efficiency tests?

Wow very nice idea 💡 👌🏻 💖

helical gears are better because they also have more than one teeth in action per moment

next, make compound planetary gears without carrier arm

my english is not very good. so ,if someone want to know what i say can copy to translate 我認為第一種(spur gear)在組裝時是方便的 因為可以在同軸上做移動，可以一直堆疊 至於第二種(helical gear)就沒有相較於第一種方便了，可能需要調一個位置 例如：迴力車玩具。 你可以先把軸安裝好在去放上齒輪，最後再將上蓋蓋好 最後是第三種(herringbone gear)，一樣套用上面的例子 在安裝時可能就需要將齒輪先安置好特定位置上，但到後面安裝軸體跟蓋上蓋就有可能出現問題 特別是出現在多齒輪同軸的問題

Çok kaliteli bir içerik olmuş. Emeğinize sağlık.

what do you use to design your gears? im not a fan of paying for subscriptions for tools like fusion 360 and they can be prohibitively difficult to design involute teeth manually since all software is going towards subscription. Imagine having your screwdrivers stop working because the subscription expired or the asking price went up 1000%

Güzel ve bilgilendirici bir video. Devamını bekliyoruz

nice vid

there's another disadvantage to herringbone gears. they can't be used with worm gears and are hard to use with crown/bevel gears.