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Extreme reduction gearing - 1:11,373,076

submitted by blacklotus90

9 years 6 months ago

This 3D-printed device offers the ability to create exponential force–by eleven million times–or, to be exact–11,373,076. You'd have to turn the crank that many times for the outer wheel to turn once.

7 Comments

*obscure, *geek

Adding video to channels (Geek, Obscure) - requested by Zawash.

I like this but I deduct points because the planetary helical gears aren't even meshing teeth with the inside of the large gears. They're just rolling along...

Retroboy says...

When I was in Grade 6 at the very end of spring semester, I'm damned sure one of these fuckers was in the classroom clock.

jokingly says...

They left one in the clock during my 6th grade summer school too.

When I was in Grade 6 at the very end of spring semester, I'm damned sure one of these fuckers was in the classroom clock.

Fransky says...

He would have a better demonstration if he used a cordless drill in place of the crank handle. It would lose the wobbly-ness of the action

Ahhh, but that's part of the beauty of the thing. The grinder gears, as they're called, are just one outer ring of n gears and one inner ring of n-1 gears. The pressure of the planetary gear causes rotation of the grinder gear by meshing one notch over each full rotation. It's an incredible increasing of the gear ratio. I believe in the video he says 1 : 17,000.

I like this but I deduct points because the planetary helical gears aren't even meshing teeth with the inside of the large gears. They're just rolling along...

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