why can’t we have gear ratios like 1:300.000

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I’ve recently seen videos on YouTube showing gear ratios like 30 million to 1 when you spin the first gear super fast at 10.000rpm and the last gear spins so slow it would take 300 hours to spin once for example. Searching for the opposite doesn’t give any result, the highest I found was 1:625.

Why is that we can have millions:1 gear ratios but not 1:millions?

In: Engineering

8 Answers

Anonymous 0 Comments

Have you ever ridden a mountain bike, one of those ones with a bunch of gears? Notice how easy it is to pedal when you’re on a low number, and how hard it is on a high number? And this is with ratios like 1:3 or 1:4. You would need some absolutely *insane* power to get that gearset even started turning. If we need something to spin fast it generally seems easier to make a power source that spins fast in the first place than to gear it up like that.

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