How do Gear Ratios Work?

Gear ratios are foundational to mechanical machine design. This video will take you through the basics and get you well on your way to understanding all things about gears!
Music:
Divider by Chris Zabriskie is licensed under a Creative Commons Attribution 4.0 license. creativecommon...
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Artist: chriszabriskie....

[@Sharklover-jv3fq]

Make a video on how to understand this video.

[@Slash1066]

Really? It was incredibly straightforward

[@vankogamer3356]

Lol

[@W3llness_Warrior]

I thought it was just me who felt that way. I still dont know how to calculate gear ratio.

[@nameerpasha6483]

@@W3llness_Warrior sames 😂

[@amerikanviking]

Here. Let me dumb it down. Big gear spin slower than smaller gear. Circumference formula is C=2×pi×r. C meas Circuference, pi is 3.14159265359, and r is the radius (half of the diameter of the circle, or the distance measured from the center point of the circle to the edge). If the circumference of circle one is 8 inches, millimeters, centimeters, fetlet, miles, kilometers, whatever measurement, and circle two has a circumference of 1 inches, millimeters, centimeters, fetlet, miles, kilometers, whatever. Then it has a gear ratio of 8:1. This means that circle two will spin 8 times while circle one spins 1 time. Simple. Gear ratios on motorcycles are a little backwards because of extremely high rotations per minute on the crankshaft. If you were to flip it around, you would end up with some pretty crazy results. Maybe even hurting yourself by breaking metal parts and giving yourself shrapnel. So, it is best to pay attention in physics before engineering things with gears and rotating parts.

[@jackdonoghue5527]

Fun fact, you dont need to find the circumference to find the gear ratio, just the radius or diameter. So a D=5 and a D:10 have a 2:1 ratio just as a C=5pi and a C=10pi also have a 2:1 gear ratio

[@grantscott1686]

what about the teeth? I thought teeth played a role in the calculation?

[@jhg8464]

​@@grantscott1686 well it is simple, if a gear with a diameter of 9in has 36 gears meaning for every 1 inch in diameter there are 4 teeth or more precisely 0.785 inches of circumference per gear (1/0.785 gears per inch) and you want a 3:1 gear ratio you downsize the circumference or diameter by 3, both of which will make the diameter 3 inches and downsize the gears by 3 making it 12 gears for 3 inches in diameter you still have the same gear ratio of circ/gears which is still.785 inches per gear

[@reginaldcampos5762]

@@jhg8464 thanks for making it more complex

[@jhg8464]

@@reginaldcampos5762 I didnt make it more complex i explained why the teeth didn't matter as long as the ratio is the same

[@jonathanmurillo537]

@@reginaldcampos5762 LMAOOO

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Great Info.. in short span

[@ConcerningReality]

Thanks!

[@Ryan_Carder]

Idk if I'm tired or just stupider from my years of not being in school. I feel like I would have understood this so much better in my younger years.

[@jaanisk606]

Its proven that a person can't really concentrate more than 25 minutes straight in one sitting and multitasking temporarily and even permanently lowers IQ. One class lasts about 45 minutes and you jump from topic to topic while switching classes throughout the day = multitasking / jumping from one activity to another. Proof that school actually makes you dumber.

[@563spaceman]

@@jaanisk606 that sounds very much like pseudoscience but for whatever reason I'm inclined to believe you

[@jaanisk606]

@@563spaceman Both the 25 minutes of concentration and multitasking = bad are very much considered to be true and proven and easily searchable. Common estimates for sustained attention to a freely chosen task range from about 5 minutes for a two-year-old child, to a maximum of around 20 minutes in older children and adults.| Several scientific studies around the world have concluded the brain doesn't switch tasks like an expert juggler. Quite the opposite. It can reduce your IQ by as much as 10 points, cause mental blanks and reduce your productivity by 40 per cent.

[@563spaceman]

That's interesting, definitely gonna have to do some research on it myself but thanks for the insight

[@inkedsights4929]

@@jaanisk606 Love how you started your factless nonsense by "it's proven". Switching classes throughout the day is not multitasking and if you think that school is worse for your brain than a debilitating 9 to 5 job that mean you didn't go there enough.

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[@alexlim5787]

Awesome 👍 short and informative, always wondered about it, but never really searched it up 😂.

[@alvinsam5]

Wouldn't the first ratio be 1:8 instead of 8:1 since the input gear is the larger one?

[@justjack6125]

it is mentioned that circle 1 is 8 times as big of circle 2(circumference). Another way of saying 8:1 gear ratio would be that circle 1 has the potential to move circle 2 eight times in one rotation. If you supposed it was 1:8, one rotation of circle 1 would have the potential of moving second gear 0.125 times.

[@211shanec]

Did not learn about calculating gear ratios.

[@blackband1215]

Same

[@soupidx1530]

You’re changing my C into an A rn. Thank you so muchhhhh

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Someone's bought a subscription to a stock video site! Really interesting vid though

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Thank you

[@juan.o.p.]

Thank you I finally understood it!

[@warlusunchikala285]

Great teaching, thank you!!

[@King_Kylfá]

He knew what he was doing with that 8 in circle

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This simple video is all you need to understand how transmissions work

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[@codiserville593]

Well, what people often fail to realize it's that the gear wars were never really shot the gears

[@coachgeo]

one that is baffling me right now is Tracks. Say a person has a 4 or more wheeled vehicle. . With nothing else changed but making space for it..... if you wrap a rubber track around all the wheels on each side so now it looks like a tank or skid steer..... have you changed the final gear ratio? If so are you now moving slower or faster. Im guessing slower with its normal tires now acting like sun gears to an outer gear ring (the track)

[@oliverpeisley5201]

At the beginning of the video were the circles spinning at the same speed?

[@RubleNoob840]

basically: when the small spins the big it’s torque but low speed, when the big spins the small, it is high speed and low torque

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Magic, got it.

[@yabrantht9475]

2:17 is an impeller is not a gear mesh, lol way of from gear concept

[@dynahzm]

youtube captions are broken fr

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This is teaching material to the people who already know this.

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Folks only 1st minute of the video is worth your time!

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subtitles are broken

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can anyone explain 2500% increase rpm on 3 1:8 gear?

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[@carinyo123]

Gears have always been the source of truth in this infinite times of lullaby world. They have kept us all involved in the energy of kindness and purity...

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Ratio

[@hpsmash77]

idk how much is an inch...

[@gilyedidya3020]

0:52 the only thing I understand from this video is c=8

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Caption is having stroke

[@JamesPhillipsOfficial]

Gears basically adapt input power into precise output movement

[@yabrantht9475]

is this how a transmission of a car works

[@RoadTo500Subscri]

The captions: just a bunch of nonsense

[@unvergebeneid]

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[@mrmasabi1007]

C=3

[@ConcerningReality]

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I left the video at "Inches" America get with the rest of the world.

[@reginaldcampos5762]

You do realize that a lot of metric countries citizens hate the metric system for everyday use? That system is just plain hard to visualize. Inches is much more reliably visual because it is about the size of a thumb.

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