The hub motor that strawberry shows is a brushless design which requires an external ESC to provide the necessary drive (electronic commutation). It is quite an engineering challenge to build (all laminated core) unless you are re-winding an existing one.
Looking at the brushed DC motor that you have in your other thread (you seem to have a lot of those now - it's getting difficult for people to understand them all in context!) I would assume that it contains an epicyclic gearbox to achieve the necessary speed reduction and torque transformation from motor to outer wheel. Again, a bit of a challenge.
I want to build my own stator from highly accessible and cheap parts (bolts, brake rotor, etc).
If I build a mid size motor and use extremely overpowered, extra-large magnets what would happen? I have around 10x 1"x0.25" circular neodymium magnets - if I buy 10 more would that be enough to build a crazy powerful motor?
Direct drive hub motors are the old style and don't have the planetary gearbox, it's less torque but still very functional. Was watching this video last night, some boring parts but over all very solid:
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I have a 3d printer (been procrastinating fixing it for around 2 months now)... nlyon plastic gears should work for building a planetary. I already have the CAD files for lots of planetary gearsets. Just want to keep things super simple though, so direct drive.