[fermenflo]

  That's also what I was taught as a best practice, but it's not always possible.

Well of course it's possible -there are infinitely many sets of coprime numbers! Silly engineers

[D_Alex]

Good luck for when you need exactly 2:1 ratio, like eg in clocks.

[Dylan16807]

Just add more gears in between.

[IMTDb]

So it's a bit like violence.

Gears: If it's not solving all your problems, you simply aren't using enough of it.

[_jal]

I look forward to trying out your infinite gearbox implementation.