The model file is downloaded on MyMiniFactory with your account — that's how their catalog works. Download it and attach it to your order: the studio will print it and quote a price.
commercial printing allowed remixing allowed
Creator's license: Creative Commons - Attribution - ShareAlike
Creator's description
Demonstration of a novel planetary gearbox. Both the sun and planet gears of two planetary gear systems have been fused. The ratios of each stage differ only slightly to give much higher final ratio (1:164 in this case, but could easily do 1:3915 in a similar form factor)
gearsgearboxfidgetplanetarycompound