About the Propulsion System (Motor, Gears) category

EFOIL.builders Propulsion System (Motor, Gears)
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Chat about motors and gearboxes

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Hi Guys,
I am looking for a cheaper alternative to those Reduction GearBoxes, since they are an important cost in the overall picture.
Anybody ordered one of those Gearboxes from AliExpress?
https://www.aliexpress.com/item/High-reliability-accelerated-planetary-gearbox-NEMA23-ratio-3-1-4-1-5-1-10-1-double/32796681777.html?spm=2114.12010108.1000023.2.682a2776yDxGWV

https://www.aliexpress.com/item/52mm-diameter-Custom-shaft-Planetary-Gearbox-Reducer-different-ratio-option-high-torque-VS-Faulhaber-Maxon-motor/1674364098.html?spm=2114.10010108.0.0.39112151DdCATC&traffic_analysisId=recommend_2049_25_83259_iswiall&scm=1007.12908.83259.0&pvid=24817709-a758-4ca8-903b-5210446f718b&tpp=1

They have many Gearboxes like those. The more significant seems to be the max input RPM to be between 3000 - 12000 RPM’s.
For the price i believe this should be something worth trying.