Vacuume powered turbine for 608 bearings with 1" hose adapter

thingiverse

Added threading to the outside of the bottom housing to attach an adapter for a 1" vacuum hose. Just need to press-fit two 608 bearings in each housing piece, use the spacers between the bearings and the rotors and use a 8mm rod as an axle. Update 1: Added spacers to keep the rotors the right distance away from the bearings and stator. Update 2: Changed the rotor to rotor spacer to be slightly smaller to avoid compressing the bearings. Update 3: Updated '1" vacuum adapter' to cut down on plastic, lengthen and widened the vacuum attachment pipe around 4mm, tapering down to 1mm wider than 1", for a snug fit. (the previous version's inner diameter was too small to fit a 1" vacuum hose, since 1" turned out to be the inner diameter of the hose, not outer, ooops) Update 4: Added a handle that goes on in between the front housing and the vacuum adapter. They use M3 socket cap screws and M3 square nuts. Update 5: Added 50mm brush segments and a shroud that fits a 4" PVC pipe that has had the bottom 1" cut off, as well as a 1" PVC pipe, that splits the suction between both ends of the shroud. End shroud also has a fitting that holds a 3rd bearing for stability.