The Finnish madman behind
Brick Experiment Channel built a crazy Googol:1 gear reduction using 186 LEGO gears of various kinds.
The build was inspired by Daniel de Bruin’s “
Universe’s biggest gear reduction” and the rotation time for the last gear would take 52433879932503535381614991275498187972589101825233846406570841889117043121149897330595482546 years to complete once!
Formula for the gear ratio:
24/8 * 40/8 * 40/8 * 40/8 * 60/1 * 12/1 * 168/1 * (140 / 8 + 1) * 141 * 20/12 * (40/8)^20 * 20/12 * (24/1)^20 * 56/16 * (36/1)^10 * (40/1)^18 * 15/9 * 56/1
List of gears used:
27x Gear 8 Tooth [3647]
1x Gear Expert Builder 9 Tooth [g9]
6x Gear 12 Tooth Bevel [6589]
2x Gear 12 Tooth Double Bevel [32270]
1x Gear Expert Builder 15 Tooth [g15]
1x Gear 16 Tooth [94925]
2x Gear 20 Tooth Bevel [32198]
23x Gear 24 Tooth [3648]
10x Gear 36 Tooth Double Bevel [32498]
49x Gear 40 Tooth [3649]
2x Turntable Large Type 2 [48452cx1]
1x Turntable Large Type 3 [18939 / 18938]
8x Gear Rack 11 x 11 Curved [24121]
1x Gear, Hailfire Droid Wheel [x784]
1x Gear Worm Screw, Short [27938]
51x Gear Worm Screw, Long [4716]