Inside the Gearbox: Helical Gears

[@TheAirsoftTech]

It has been brought to my attention that some people wish to donate to my KZbin channel. Donations would help me be able to make more content more frequently. Do not feel obligated; if you can’t or don’t want to donate, continue watching! If you feel I deserve a donation, here’s where you can donate: www.paypal.me/RyanSpurlock291

[@tariqnordsve2796]

The reason the helical gears is more silent then spur gears is that it has more teeth engaged at the time on the meshing gear. If you don't go with a helical piniongear the sound will still be loud since this gear is the one with the highest amount of revolution. I belive that if you install a helical pinon you will get the sound you are looking for.

[@wrenchtheroo6557]

Actually its less surface. It engages from one end to the other as a straight cut its the full width of the teeth

[@h82crash]

@@wrenchtheroo6557 I don't know if Tariq edited his post, but I didn't see anything about surface contact and he is correct that more than one tooth is meshing at the same time. And they slide into each other instead of pounding into each other. Straight cut gears can handle more torque and have less friction. Helical are quieter, their only advantage. Also the most noise reduction will be from a set of helical pinion/bevel gears.

[@bbevis2357]

Wanted to add a couple supplementary comments on using helical gears. The more technical reason they are theoretically quieter is because torque is distributed gradually between the teeth as they engage, and also because the angled profile pushes the gears apart axially into the bushings/bearings, removing slop. I say theoretically because the higher ratio results in more gear and motor movement, which ultimately plays a bigger role in noise you hear. The main upside I find is their durability. The teeth are generally thicker by design, and in my experience wear more evenly. The higher ratio also requires less torque from the motor, which is good for your batteries. The downsides are they are harder to install, and need a more specific setup. I have found they work best with a faster or mid speed motor and active braking mosfet. It would be interesting to see lower ratio options for helical gears in the future.

[@bbevis2357]

Another note. 100:300 I believe is 26:1 ratio, not 36:1. The only difference in the 100:300 and 100:200 is a 9 or 10 tooth bevel gear, at least for the shs sets. For anyone interested in getting a set at this time you can get new shs sets at Airsoft Atlanta for $14 or $15

[@rivingmizzenmast]

Wow, that is cheaper than I would have thought. Thank you for this!

[@jonnieZG]

Nice video! BTW, I have counted the teeth on SHS gears and found out that "100:200" has a ratio of 23.8:1 while "100:300" has 26.4:1. SHS 100:200 Pinion 10, Bevel 30/10, Spur 45/21, Sector 37 => 23.8:1 SHS 100:300 Pinion 10, Bevel 30/9, Spur 45/21, Sector 37 => 26.4:1

[@TheRealDealAirsoft]

Loved the video man. Airsoft knowledge is so hard to come by and honest info too. Keep up the good videos. I remember seeing your channel before I started teching. Kinda motivated me to produce honest / clear to the point tech videos. I’m on a little journey trying to educate as many Airsofters as possible Good shit airsoft Tech keep up the amazing work

[@jacobberardi3277]

Yeah man I’ve been watching him for a while. Just checked out your channel real deal and surprisingly your work is impressive. I just subbed. Shoutout to Airsoft tech to bringing the community together

[@rapidexposuremedia1701]

Shout out to the airsoft tech. Bro your channel brings all of us tech nerds together. And bro real deal your work is dope too going to SUb as well

[@TheRealDealAirsoft]

Rapid Exposure Media Thankyou bro wasn’t expecting that

[@TheRealDealAirsoft]

Rapid Exposure Media Thankyou bro seriously

[@rapidexposuremedia1701]

@@TheRealDealAirsoft yeah for sure man any time. hey a good airsoft tech is a good airsoft tech. shit i aint got anything to lose subbing is free bro

[@spambot5678]

The juxtaposition between the loud and booming intro and the soft and quiet voice is quite funny.

[@bungalarangan100]

Nice g3. I hear less gear and motor sounds but more air sound which is nice. I hope you show more of this g3

[@butcher6939]

good enginieering basics shared on example of the airsoft gearbox. Your channel is the most valuable source of technical asg knowledge i have ever seen on yt. Keep it up, you are helping a lot.

[@cuajocuajocuajo]

a video like this was missing in youtube

[@BikeWorkz1991]

I just ordered a 100:300 shs gear set. Thanks for the tips. Them come in handy

[@dynasty_aatc]

Where did you buy it

[@allighast9714]

Thanks for helping my matrix sportsline metamorphose into a B E A S T Only the gearbox,mosfet and receivers are the stock and even then the externals are getting wrapped in car vinyl and waxxed because we all know at the end of the day airsoft is a fashion contest

[@mnlgrnwd4152]

this vid helped a lot with the basics. I do have a question tho that hasnt been adressed: Could you explain the Gear Ratio given by the manufacturer? Usually we work with 13:1 - 20:1 which is simple to understand, 20 rotations of the bevel gear turn into 1 rotation of the sector gear. Gear Ratios with helicals are denominated 100:200 or 100:300. I don't get that. How do you arrive at the 24:1 and 36:1 and how does the calculation work? I know these questions are delving into detail but your help would be appreciated. thank you!

[@5cmpersec]

I'm not entirely sure what advantage the helical gears can provide for airsoft other than quieter operation. Also I've never seen tappered roller bearings or thrust bearings being widely available in airsoft sizes to work with these helical gears. The added axial load would make the gear train less efficient.

[@janzugic6798]

sounds beautiful. masterful.

[@tainaap]

Thanks for the great video! Could you share some thoughts on what would be your ideal/what you usually go for in DMR builds? I'm studying and looking to build an extremely silent and consistent DMR, so any knowledge would really be helpful!

[@keeemzj]

Can you do a KZbin premiere so that we can donate?

[@TheAirsoftTech]

I’ll look into it, but if people want to donate to the me for the channel than I can just link my paypal.

[@ianr2609]

I was curious if you could make a High torque build with 32:1 gears, High torque motor, half tooth piston with roughly 400 fps m4 or mp5 because I'm so interested on seeing what you could do with that, I really appreciate what you do and don't push yourself too hard in these tough times :)

[@democracy2005]

400 fps is nothing with 32:1 gears, you can even make it up to 550 fps

[@zacktrever1878]

@@democracy2005 is this the route to go if you want trigger response, but lower rps with 11.1v?

[@democracy2005]

@@zacktrever1878 nope, trigger reponse is better with lower ratio gears like dsg or 12:1 ssg with high torque motor

[@silvergoldengun2747]

hello! good video thx. does it render the gearbox more silent?

[@TheMonist_]

Another great video Thanks again!!!

[@StorMRagE4EVA]

Dude that's sounding fantastic is that an OG model you got there I didn't see the quick change springguide design so I'm just taking a guess that it is, which is rare solid and awesome, also I need to make an HK21 MG Version with another one I plan on getting myself

[@rivingmizzenmast]

Great video, and I love the new hair style!

[@TheAirsoftTech]

Thanks 😜

[@Solidsnake0208]

Same, it’s great to see the airsoft tech ‘grow up’ throughout his videos!

[@JJMoore]

What’s up buddy great video.

[@ViniColen]

Teoricaly, this is the stronger gear that is possible to put in an AEG, right? (the 100:300) . So, teoricaly, in your opinion, what is the stronger spring this gear can push without break itself? Of course, we are considering an high quality piston.

[@lungrenthe5430]

cheers

[@windycityairsofter1449]

What would you say the best hi torque gear set would be my guy this is for a kwa rm4

[@jacopienaar9157]

hey just one question. can you get a 15 teeth sector gear with a 14 teeth piston..?

[@savvy6310]

Can you do a video on cleaning motors?

[@doanh6499]

if u use brushless, then u wont need to clean it. if it is brushed, the 1 time u clean it is when it brand new, before install into ur aeg. after that, use till broken than replace with a new one

[@mikemegadeth4110]

So when shimming bearings should I account for the slight movement that the bearings move when I push on the gear when checking the shimming? I've heard bushing are .1mm and bearings is .3mm. So is that .1mm both bearings move and .1mm of movement of the gears axel inside the middle hole?

[@theFoxxx866]

Need to know too

[@troyw5832]

☺😊😀😁😂5 Smile's sounds good to me!. Facebook gel blaster Australia.....ACR J10 or your Madagascar dose that tan gold top reciver fit have heard its a fit but checking and not available at moment..clip motor got one motor wined one, but only one tooth to the gear to spin the clip feed wheel?? but she is noisy like looking to see if i can fix, wear in may help and may have a spare spindle one a bit longer??compared to the original magazine you get suoer quite but has a 4 tooth lock in.

[@democracy2005]

is there a high speed helical gear ratio?

[@oooppiikkk]

What's the point of ball bearings instead of bushings inside aegs? isn't the springs and the motor going to defeat the purpose of them since aegs are not designed for long continuous rotations Usually, everything that uses ball bearings has a goal of reducing friction to improve speed and efficiency (skateboards will roll further, fans can run more efficiently, ect)

[@Fernando-ry5qt]

If you fire in full auto the system works non-stop for a lot of cycles, the reduced friction is considerable

[@oooppiikkk]

@@Fernando-ry5qt I would think once the first tooth of the piston touches the gear there would be no difference between the bushing and bearing right? so that small degree of rotation to reset the gears for another pull would be the only time it would come in handy, but even that its at the mercy of how soon the piston can reset.

[@Fernando-ry5qt]

@@oooppiikkk The motor works with the system as a whole, every bit of resistance costs you time and battery, you can't neglect the friction during spring compression, there is always friction on the gear's axles while the system is engaged, being the spring engaged or not. Ball bearing have a lower friction for the axles at the cost of a more fragile piece, they also usually keep lubrication for more time, making them almost always better in low/mid powered applications.

[@oooppiikkk]

@@Fernando-ry5qt I see thanks for the clarification!

[@troyw5832]

And the industry needs a tec to do this type off job airsoft and gel blaster for the replica industry sports. you should see about the job your going to have to make it??. From out the box to i went real steel and what's best for that build, me ACR J10 or the airsoft Madagascar and even after all the mistake and repair like 1100 worth i still would not change it and its still not on gas yet! Be around 1600 and hope your top metal reciver if she fits and get which should be ok for all 3 2500 for something special 4 but thats in the work's 😆huge potential.

[@ericsilver9798]

Question: Does anyone know if the straight chamber prommy extra soft bucking is any good I remember the soft blue one being really bad but I just saw these start to pop up and wondering if anyone has experience with them? thanks

[@Qiezed]

So cute