Math Calculations & Conversions : Definition of Gearing Ratios

In defining gear ratios, remember that the gears either go up or down, and what's important is the number of teeth on the wheel. Discover the definition of gear ratios with tips from a math teacher in this free video math lesson.

Expert: Steve Jones
Contact: www.marlixint.com
Bio: Steve Jones is an experienced mathematics and science teacher.
Filmmaker: Paul Volniansky

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[mattybock]

@phulei

here's how it works;

if you have a gear with 5 teeth, each tooth with knock against a tooth on the receiving gear. ok?

if I have 5 teeth on the receiving gear, then there is no advantage, they are equal.

If I have 10 teeth on the receiving gear, then it will take two whole revolutions of my drive gear (5 teeth) to make one revolution. This is slow :(

If I have only two teeth on the receiving gear, it with turn twice for each revolution of my 5 toothed drive gear.

get it?

[phulei]

I still don't get why say, 0.5:1 is faster than 3:1. Could someone please explain :( Thanks.

[JustinBieberLookLike]

u helped alot middle school sucks

[TheNiggerXavi]

Oh so gearing up or down is with respect to speed and not force ?

[WANAGOSCUBADIVE]

so the higher numeric number the gear ratio is like 4.10 instead of 3.73 the 4.10 ratio would be better for pulling a large amount of weight because the 4.10 gear ratio will devide the weight more 4.10 is 4 and 1/10 spinns instead of 3.73 being 3 and 73/100 spinns? so 4.10 devides more so 4.10 is better, am i right?

[WANAGOSCUBADIVE]

im considering buying a truck and i want it to be able to pull more weight and be able to pull weight easyer so should i get it with a 4.10 or a 3.73 and does 4.10 mean that that gear turns 4.10 times so it would be a better gearing ratio for pulling?

[Icedout100]

i thought teeth ration is driver:driven and gear ration is driven:driver