What’s the difference between a cog and a gear?
In: Engineering
A cog can be any spinning wheel with sticky-outy bits which pushes against another wheel with sticky-outy bits so that they both spin together.
A gear is a special type of this mechanism in which the sticky-outy bits are specially shaped so that at the point where they touch the two pieces *roll* against each other rather than *sliding* against each other, as cogs would do.
Rolling generates less friction than sliding, so this special shape is more efficient at transferring power from one wheel to the other.
This special shape is called an involute.
A cog is a tooth on a wheel. When two cogwheels mesh with each other, they are called gears. When a cogwheel works with a chain (and some sorts of toothed belts), it’s called a sprocket. The remaining applications that use cogs may only have one or two on a wheel, so that the interaction is intermittent, or involve other mechanisms like a ratchet or track.
In the strict sense, a “cog” is a tooth on a wheel. A cogwheel is any wheel with teeth. A gear is a cogwheel used to mesh with another cogwheel. And a sprocket is a cogwheel that links to another cogwheel by means of a chain.
A cog is used to transfer motion from one point to another, a gear is a type of cog used to change the speed of rotation (or I might have completely made that up).
The Coalition of Ordered Governments is the one the many governments on Sera and the only to kinda survive the locust invasion. Gears are their soldiers.
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so whats better a cogswell cog or a spacely sprocket?
One is the Coalition of Ordered Governments, the other is the colloquialism for their frontline infantry.
/s
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Since it’s been explained already, the way I like to think of it as a gamer is: In the game Gears of War each solider is called a cog and as a team they’re called gears, which is actually a pretty good analogy. Basically gears are made of cogs.
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