Build & Test Lego Gearboxes: 2, 4, 6, 8, 12-speed

Each gearbox is built from scratch and then tested for speed and torque. Flat layouts only (gears are on the same plane) for better visualization. Enjoy!

00:00 2-speed
01:09 2-speed with driving ring
02:31 4-speed
04:02 6-speed
05:58 8-speed with range change
08:29 12-speed with splitter
11:48 all gearboxes side-by-side
12:09 graphs

Key Lego parts used in this video:
Driving Ring 2L [6539] https://www.bricklink.com/v2/catalog/catalogitem.page?P=6539
Axle Connector 2L [6538c] https://www.bricklink.com/v2/catalog/catalogitem.page?P=6538c
Gear 16 Tooth with Clutch, Smooth [6542b] https://www.bricklink.com/v2/catalog/catalogitem.page?P=6542b
Changeover Catch [6641] https://www.bricklink.com/v2/catalog/catalogitem.page?P=6641
Changeover Plate [6631] https://www.bricklink.com/v2/catalog/catalogitem.page?P=6631
Driving Ring Extension [35186] https://www.bricklink.com/v2/catalog/catalogitem.page?P=35186

Check out a great resource on Lego gearboxes:
https://www.lugnet.com/~3813/

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