Designing, 3D printing, and testing a turbo pump for injecting fuel and air into a rocket. All turbo parts are made with resin 3D printing, to eventually inject fuel and air to a rocket.

3D files:
https://www.thingiverse.com/thing:532...

Turbo uses 3mm bolts and nuts.

Small bearings:
https://www.amazon.com/dp/B082PS3QDJ/...

Large bearings:
https://www.amazon.com/dp/B07R11PBZ8/...