1379:1 Gearbox

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Summary This is definitely no joke! Watch the YouTube video now at https://youtu.be/VnWY0r1r9lQ. The gear ratio of two of these units connected in series is a staggering 1,901,641 to 1. Important Disclosure Please be aware that this gearbox is designed as a simple demonstration model. It will self-destruct under load. To see the failure mode, watch the end of the YouTube video. Gear Down For What? It takes an astonishing 1,379 turns of the input sun gear for ring gear #2 to make one complete rotation. These units are designed to be mounted in series on the channel or driven with the included stepper motor mount. To use two gearboxes and the stepper motor mount on the same channel, you'll need to extend the channel length significantly. However, keep in mind that watching the second gearbox rotate is quite slow and rather boring. Gear Details: The helix angle is 30 degrees. The pressure angle is 20 degrees. Planetary Gearset #1 (Input End) Tooth Module = 1 Sun = 16T Planets = 17T Ring = 50T Planetary Gearset #2 (Output End) Tooth Module = .846 Sun = 19T Planets = 20T Ring = 59T I have also included the Fusion 360 Project with this.