HELICAL VS. STRAIGHT CUT GEARS | Donut Media

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You’ve heard about gears, transmissions and dog boxes, but do you know why your car has Helical Gears and Race Cars have straight cut gears? What's the difference between helical and straight cut? You’re about to find out! It’s Science Garage!
Bart teaches us how cars work by blowing stuff up and cutting things in half. It’s a science show for the car lover who’s easily bored. Join Bart as he explains the science behind everything automotive. This is cars down to the atom. This is Science Garage.
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[@Alexwaltman850]

I miss this guy and this type of script writing. I forgot how much better Donut use to be.

[@Kloppin4H0rses]

Then that idiot took the channel by storm and it's a race to see who can act the most hyper and absolutely retarded

[@johndekijk]

what are you talking about, this is unbearable. he is so fkin annoying I just skipped a whole 5 minutes in the beginning.

[@zchhrrs4590]

Yeah whatever happened to this guy he was my fav

[@nathanhilton1865]

I was wandering the same thing!!

[@Buff_MC]

​@@zchhrrs4590he quit in 2019 to work for motortrend and kbb

[@boudewijnb]

You know, normal cars(with a manual transmission) do have some straight gears: the reverse gear. Ever heard that weird noise when you're reversing? Thats the straight cut gears.

[@SatlaE]

WOW mind BLOWN thank you!

[@n_u001]

There is no actual reverse gear, except in manual transmissions. The reverse gear is just the planet gears of the planetary gearset of an automatic transmission, which use helical cut gears. Search up how a planetary gearset works on youtube before you start spurring out bullshit.

[@boudewijnb]

nouse use hey i'm sorry, didnt know this was only for manual cars, and also, most cars in europe are manual, and not automatic, like in america.

[@EddoWagt]

Why is that?

[@n_u001]

ITS THE SAME THING DUMBASS. Manual gears are not straight cut either so stfu and go read up on manual transmissions.

[@andrewg4412]

Straight cut gears are awesome, used them for years. You can't argue with me because my tinnitus screams louder than you can

[@seriousgameofficial]

Lmfao

[@presinald]

pretty sure if I drove a car with all forward straight cut gears it would trigger my PTSD from my first car's transmission grenading at 60 mph lol

[@nc_g8gt]

@@presinaldlol what happened when it blew up??

[@djhero0071]

@nc_g8gt I don't think we'll ever know

[@JuanPerez-yg3hj]

Why is it called science garage if the whole thing happens in a kitchen?

[@garinramadhan6572]

nice point

[@DipankarrShakya]

Cooking pretty much is chemistry.

[@javanbybee4822]

Adrian Perez science kitchen

[@j.lucido9536]

Tell me about it

[@FL00BI]

reminds me of LTT

[@TheMelodySweet]

Bart failed to mention just how badass straight cut gears sound at speed. As a mechanical engineering student I love watching your videos, they are educational as well as entertaining, I think you found the right balance of being educational without getting too bogged down and bored by the theory and math behind the concepts

[@Jamnol101]

One of my teacher once told us that in the old days all gearbox were straight cut, even truck's one, he said the sound of it was louder than the engine once you past 50 mph

[@TeamStevers]

TheMelodySweet ten bucks this chump is lying.

[@Carlos-hr9kg]

Is it worth a being a mechanical engineer? I was thinking of pursuing that

[@johndowe7003]

@@Carlos-hr9kg no, most that ive talked to arent actually doing it despite their degrees

[@Carlos-hr9kg]

john dowe thanks for the input. Appreciate it :)

[@Mikey6048]

Bring back this series. It's the best car explanation series on KZbin.

[@dianapennepacker6854]

I like this series. Driving 4 answers is the best series for car explanation IMO.

[@dauzzieboy1987]

Was going to say the same things, guess you could say they’re much and much the same though.

[@LordBathtub]

It's long gone sadly. Bart left Donut like 4 years ago :( They never made any public mention of it that I remember so I suspect it wasn't on the best of terms but I'm not sure

[@Frost_Tiger]

You forgot metal gear solid

[@markoz673bajen8]

5

[@TheWolvesCurse]

plastic gear viscuous

[@dangerm2156]

Nano machines son.

[@shaggings]

@@dangerm2156 Nano *FIDDLES* son!

[@bigmeme8464]

Kept you waiting huh?

[@aarontena]

"The second thing I like to grind is gears" But what's the first one? *Concern*

[@eg6racer101]

Herb

[@60000L]

It's obviously James

[@Pishposhing]

Your mom.. boom..roasted

[@sergeantspeed5941]

Babies

[@MrThewildrider]

My mind's telling me no.

[@Fidelitye]

Am I the only one that knows what straight cut gears are because of The BMW M3 GTR in NFS MW.

[@bozo6206]

No, I'm a fan too. Too bad the Payback abandoned M3 doesn't have that straight cut gear whine.

[@Fidelitye]

@@bozo6206 or the straight cut Gear transmission swap.

[@johncarlofernandez2698]

Too bad not everyone was here because of it...

[@erojerisiz1571]

The Gaming J.D m3 gtr is life

[@zavexheart6935]

I was. But I've been trying to figure out what that gearbox whine was anyway. I always thought it was the drivetrain, when you get to higher speeds. I also hear it in some rally cars.

[@puderrick8634]

How familiar with the gear wars are you exactly?

[@Angryeddie14]

Pu Derrick ah a man of culture I see

[@DecanioSS]

I was looking for this

[@jackstephens7222]

Uhh not at all

[@owentustinfuchs4617]

Woah, a fellow intellectual among a sea of ignorant idiots.

[@1pdigit]

Oh, I think I see someone I know, you'll have to excuse me.

[@bassam_salim]

The reverse gear is a straight cut gear in all cars and that's why reverse sounds louder, right?!

[@MrEazyE357]

Yes

[@willmiskovich359]

that_G_EvanP y though

[@steventrott8714]

@@willmiskovich359 Its got to be cheaper to manufacture a straight cut gear than a helical. It makes reverse noisy, but how long are you in reverse to even recognize it?

[@roxasparks]

Yes

[@schmid1.079]

Missed the most obvious pun, Richard Gear.

[@pgtmr2713]

And the clip of him not being able to get the Lotus Esprit in "gear" from the movie Pretty Woman.

[@chrisbentley6254]

PGTMR2 genius! Donut writing staff hire this guy 😀

[@GETUPANDGO]

Damn, opportunity missed

[@LethalJizzle]

Dick Gear to his friends.

[@FragLikeIts]

Metal Gear....

[@ArbaazKhan-eg2qc]

Take a shot everytime he says 'gears'

[@gsdfan8455]

Damn, I'm not twenty anymore.

[@javanbybee4822]

Shit I can’t I don’t have any

[@harryeyre1322]

Sry underage

[@jamonteburns6073]

Does it count if I already went through a whole bottle of Grey goose and half a bottle of Jack on Saturday night?

[@leonidascervantes3800]

And now I'm arrested for a DUI

[@snelleharry9158]

Top Gear!

[@Endidixknsej]

SnelleHarry 5th gear

[@harryeyre1322]

DAMMIT I was just about to say that

[@debbiemeyer2693]

._.

[@killman369547]

the OG Top Gear though with clarkson hammond and may. not the "new" top gear.

[@rogehmarbi]

bottom gear

[@brianpayne1799]

Bring back science garage please, these were (still are) great!

[@Subtlepasta]

As a mechanical engineer, we needed this kind of enthusiasm in undergrad!

[@alexbbruce]

Damn, I miss having this dude on Donut

[@VDVC-RC]

Me too😞

[@aaronfrench8322]

Same

[@Berchol]

He’s at Motortrend now

[@ewatfred]

"Cars that like to go fast" is up there with "The bus that wouldn't slow down"

[@Crypticdragon1]

I hope Bart is doing well. I miss watching him explain stuff like this.

[@GustavAhlbrand]

What happened to him?

[@Crypticdragon1]

@@GustavAhlbrand He left for personal reasons if I remember right. Had a kid shortly before he left.

[@bigstormy8622]

@@Crypticdragon1 damn I was just wondering:( gotta respects him for doing what he feels is best

[@LightsaberGoBrrrrrr]

@@GustavAhlbrand the first explanation was he left for family reasons but I’m pretty sure he’s at motor trend now

[@marekkielar2867]

I love the whine of straight cut gerars! Its the best accompaniament to motor sound, even better than turbos and superchargers IMO.

[@listenbro3673]

Same I love it so much that I starve my tranmission of fluid so I can hear that killer whine might be a different whine but still a radical whine hahah

[@burger116]

**comedy intensifies**

[@Tensho_C]

you have a video

[@thatbrokegamer.]

@ThomasKT he's a pleb :')

[@guthannight]

Shit can I get subs I'm on the road to 2k lol

[@bongocat5223]

@@guthannight stop begging for subs

[@MinecraftBrosOfficial]

how the hell is this a joke? Bad excuse, because someone called you out for begging for subs.

[@zephyrkds1839]

STRAIGHT CUT GEAR IN BMW M3 GTR!!!

[@leilalopez6003]

Denis Novendra Um actually it's full name is: BMW M3 e46 GTR

[@halofreak1990]

@[GD] hiyarus In the case of the BMW you kinda have to, since there were multiple M3 GTRs from different types. Using the full name means people know which one you're talking about right from the get-go.

[@michealgray533]

halofreak1990 it’s like saying I have a mustang You get the point and mental image so you don’t need to say 1965 or 2015

[@DaxanDaxter]

You can just say "E46 gtr"

[@erojerisiz1571]

@@leilalopez6003 BMW M3 E46 GTR ALMS

[@civicmaster5005]

Hey guys, thanks a whole lot for this series. Everyone loves to learn stuff and its better with the comedic relief and graphics. Would have been useful for me last year, when i had a test on this, but it is going to be easier for everyone else. Thanks to everyone at donut!

[@MrChrist741]

How to make gear sounds interesting.... Say gear louder.... 😂

[@user-lu4ng9mg9y]

What about Straight cut gears' sound? It IS loud, but also - great.

[@ahmetkeskinoglu_]

Watch that video --> "Bmw M3 GTR nürbürgring Hans joachim stuck" (not sure about drivers name)

[@gremlincc]

Jessica started a land war on an Asian Continent

[@B10401]

Which Asian continent?

[@terrabnadia1793]

Why are you always top comment? Lol

[@sgtmoose1942]

You keep using that word. I do not think it means what you think it means.

[@gremlincc]

Aidan Barrett Some have told me it’s because of my stupid smug face

[@vizualmrs]

@@gremlincc it's cuz your white

[@dicktrickler]

It’s July 2022 and I still want Bart back

[@sean2911]

I love these videos man! Perfect mixture of humor and science. Thanks and keep makin science garage

[@webshows12]

No M3 GTR Video???? Btw, great work! Science garage is my favourite thing in Donut.

[@SangheiliSpecOp]

I was expecting a Gears of War reference and I wasn't disappointed. Thank you

[@josemaribunag7485]

Damn, I want to see Zach and Bart in a single video

[@brydensears6318]

I love the little puffs when his hand hits the bench. Classic!

[@semhouben6300]

I wish this series continued. Helps me so much with my education

[@wesleymurdick1382]

rip to the golden era of donut media

[@MitchFromSyd]

This is the clearest explanation on the dif in heli vs straight! Love it guys

[@ShadowRose]

Not inserting a piece of 2001 BMW M3 GTR ALMS into an episode about straight cut gears is a sin.

[@TorutheRedFox]

yes

[@shiroyasha7324]

Indeed.

[@Sunnyislive25498]

True

[@shinomakichuppy8236]

That's my whiny boi

[@stevel.6046]

gotta say this is my new favorite channel man, get science garage shirts!!!

[@6Twisted]

You didn’t mention opposing helical gears eliminating the need for an axial bearing.

[@jimj2683]

I was looking for this comment!

[@Herb.]

Love those little flames that pop up when ya slam your hands on the table lol

[@AliasAbhayRao]

I miss this guy & this series!! Used to be such a blast!

[@VerySeriousPodcast]

This episode has the funniest intro out of all of them. Keep up the good work guys.

[@zumabbar]

"lend me your gears" lmao

[@maegan22my]

The puns are so beautiful.

[@Endidixknsej]

maegan22my you are

[@maegan22my]

DSSR your mom is beautiful

[@marcosramirez5084]

maegan22my such love

[@bloodyfx1065]

Wow, look at those thirsty fuckers.

[@marcosramirez5084]

Bloody FX well haven’t fucked in 2 weeks you better believe I’m thirsty

[@guerreromanuel]

Discovered your channel with this absolutely great video. Fantastic job :D I'm subscribed

[@klauserji]

"Left handed and right handed" THIS IS IT. I SUB FOR UP TO SPEED, STAY FOR SCIENCE GARAGE.

[@internetsguy3506]

Just finding these old episodes and this guy was awesome!

[@drockjr]

he's the boss guy. donut just realized their other presenters get more views

[@hh-dr4db]

2:08 is when he gets to the point.

[@vat_1989]

Thanks a lot man. This channel is amazing

[@Mrspyderracing]

Oh How I miss you Bart 😢🫡

[@jamber787]

Dude, you’re hilarious! You’d make an awesome high school automotive instructor

[@darkcrusher-jt1dr]

Im going to go use this information to build a transmission. Some day when i get money.

[@Robert-jv4hf]

Make a fixed ratio transmission for an electric. That shouldn't cost all that much.

[@Hucyfer]

you need to know way more than this to build a transmission; this is just basic stuff

[@aaronvanmorris6005]

Dude I’ve been trying to figure out the advantages and disadvantages of both as of recently so it’s insane that this video just came out 😂

[@raywink408]

I love these videos keep up the good content

[@ScipioXII]

Nothing wakes me up like :rolls dice: Straight and helical gears

[@fae_gavan7582]

Straight cut gears: whine. Nfs BMW M3 GTR

[@ARSZLB]

who puts these little things in like Bart’s hands at 5:04 😂 i love it

[@Ninja9996]

Love these videos

[@FishTurd69]

Actually a common engineering solution to the thrust loads caused by helical gears is by running another set in the opposite direction. Essentially it just cancels out the thrust load. Also thrust loads are used to make sure that bears stay in the desired place.

[@stoneylonesome4062]

You mean Herringbone-cut helical gears? Funnily enough, that’s where the logo for Citroën came from. Founder, André Citroën, got into the automotive industry by producing herringbone gears, which were even used in the steering gear of the RMS Titanic. Said herringbone gears were also used in the final drives of Citroën vehicles, up until the Traction Avant.

[@sebsshenanigans]

As the owner of a bugeye rexy... This is the video i need before we get more boost in it :')

[@freelimes8389]

Shiii bugeye gang

[@sebsshenanigans]

@The FruitOfDestiny dam, and there stronger than rexys as well :') got a fmic, injectors, headers, intake and fuel pump about to go in soon. so it's either the block or box thats shit's it self by christmas

[@sebsshenanigans]

orange flavored potassium first, wtf is that username aha, and yeh, hated the look 2 years ago then it grew on me

[@ore0690]

Cool vid! I learned some stuff

[@kimanhireid1364]

cant wait for this series to come back

[@jonathansaenz7104]

Bart gets funnier every episode

[@jonathansaenz7104]

What do you know about the "Gear Wars?"

[@jackstephens7222]

Its " How familiar are you with the gear wars exactly?" Peasant

[@NRMotorsports]

I need a dog box transmission ASAP! Great video guys

[@Patrick156843478]

Love you guys, and what you do hopefully your channel followers starts picking up some speed, but honestly looks like you guys put in alote of work into your vids your my favorite channel, thanks :)

[@danfg7215]

why is the teamfortress scout talking about gears?

[@mateuszodrzywoek8658]

why not

[@gogogomes7025]

0:53 no richard gere ??, well it' about time to unsub then...

[@harryeyre1322]

GOGOgomes Karmen gia

[@kertaspaper94]

Yes I was hoping you'll make this one

[@FIRE-OWL.]

Thank you for all the entertainment

[@iRunfastXC]

What happened to this guy I love him and I need him back 🤣

[@evelynkinson5524]

I'm sad about it too, he went to motor trend after taking time off because kids

[@arphmd]

The best satisfying straight-cut gear transmission racecar is ALMS version BMW M3 GTR.

[@chereng9250]

56 seconds was all it took me to subscribe, I love it

[@MrTheludman]

Currently learning Kinematics of Machinery and this is so fun to watch :D

[@ag135i]

Thanks Bart for another awesome funny and informative video, on a lighter note I think the middle finger is the world's first and most common lever which people use on one another.

[@TailHappyTV]

you're grinding my gears

[@seansmith4440]

Ok Peter.

[@samuelcruz3722]

I'm one of the few that watches this episodes to see the new "don't tell to my wife" part and star laughing.

[@Mr.Titanium1911]

Nicely explained.

[@jonathangallardo3403]

Its okay Dolan. Always remember that James's dad never stuck around.

[@slkalmuhairi]

0:56 Ladies and gentlemen, that's how racism ended

[@LuminousPath13]

Well there’s only two types of people in the world, left handed and right handed! Kinda makes you wonder what all the fuss was about in the first place 🤔

[@ericlotze7724]

funny bit, at some catholic schooles etc a while back, being left handed was considered sinful (hole devil left side nonsence?). SO even with lvr handedness we figured out how to hate eachother for that lol.

[@HadiHilmanNorizan]

Please keep it up. I'm your number 1 fan from KualaLumpur,Malaysia! I will spread the love

[@SubiefanWRXsti]

I love the little dust clouds the animator adds on the table

[@talalaldokhayel6842]

You forgot about Metal Gear Solid

[@TheJoe999Man]

This video really grinds my gears.

[@MrAli015]

Man thanks a lot, you made that simple enough

[@nicholaskajfasz9558]

I miss Bart.

[@samuelsalita1660]

you forgot about metal gear solid

[@TomasRC23]

LOVE YOU GUYS YOUR HILARIOUS!!!!!!!!!!!

[@coconut_blond2296]

I installed honey, but also i like how your videos have evolved. Its a lot funnier now with the cut away shots. Lol

[@Geurinteed]

Gears Brosnan, Gears Morgan, Morgan Gearmen, Samuel L. Gearson. The list of gear puns are limitless 🤔

[@drsm7947]

He miss Metal Gear :(

[@GROOV3ST3R]

Limitless, just like gears in a Fast and Furious gearbox

[@Turoloco]

Daniel Gearin

[@bjarkijohannes1606]

Im watching this on the toilet

[@victoreboli211]

Ok....why do I need to know that?😂

[@kwakhru435]

So ?

[@MonkeyWrenching]

This show, is why we subbed. 2 thumbs up. 👍 👍

[@armandotrejo1550]

My favorite from the channel

[@pataconaso]

RAMCHARGERS!

[@ThatBoiiB]

We hereee🤠🤠🤠

[@mohammedameequddin8697]

What an explanation👍👍👍

[@ercanyesiltas]

I LOVE THIS CHANNEL

[@zerotwopingbob]

What kind of the people will hit that dislike button? I wonder

[@blakecaliper5406]

Cyclists

[@greatcrusader88]

James

[@harryeyre1322]

OAPs

[@TheExactlyatmidnight]

Electric car drivers?

[@the_honkler778]

People that are disappointed that he missed an obvious gear pun in the beginning

[@TyNguyen-wg8qc]

haha 1mn

[@timearle3329]

To this day, one of the better parts of Donut. Internal executive decisions are not my business, but sayin...

[@marcusdavies4069]

love the vids

[@mariebcfhs9491]

I'd love to be a racist, I love driving cars and driving them fast

[@dariotahiri7601]

Life is a race and we are the racists.

[@Falcon_888]

car community is definitely full of racists