Update: 13/02/19, The reduction gearbox design is all but complete. I am in process of printing a prototype to see if it works!
I finally got there! This is now the culmination of all the other creations i've posted. In this iteration, The case components and bearing housings incorporate a locking Lug system so they will lock together without need for gluing etc! The cases also include 3 "teeth that lock into the outer band which prevents the parts rotating and coming free!
I have modified the Turbine Hub design slightly to save material. In the photos I am using a 11.92mm brass tube as the axle as this is much straighter than I could get with a printed axle.
The bearings again, are 21mm x 12mm x 4mm ball bearings that can be picked up cheap on amazon.
Next I am in the process of designing a reduction gearbox that will take the drive and allow me to power something so standby for that, it will be a new module that should lock straight into this existing setup.
various/ whatever you like
printed bed temp 50 deg C with 195 deg extruder
Little Tidying and freeing
Each part will require the support to be carefully removed. There isn't too much if you orientate them well in the slicer.
Depending on the printer, the locking parts could be quite tight and will need a few actuations to free them a little but they are all fine after that with no play.
This is a step by step process whereby I came out with the initial idea which you guys will have seen on here. It was not without a couple of niggles that needed to be sorted IE, tolerances, print quality, assembly requiring glues etc which I was not ok with. I am aiming for a properly designed and built part that you guys can create and just put together (save for the required items like bearings)
Lots of back and forth to CAD to tweak the design and incorporate additional functions.
Key to my process is trying to look ahead to what I want to do with it next IE, including the provisions to attach the gearbox module coming soon.