Using a forstner bit and drill press, drill six 2" wide holes every 60 degrees in a 1" thick plastic rotor (will need two rotors):
Drill press and rotor-drilling jig, 2"x1" grade 45 neobydimium magnet:
Finished 12" wide rotor-half with 6 alternating N-S magnets:
Views of two of these rotors stuck together (now 12 magnets total) with black plastic plate in between which prevents magnets from pulling out sideways:
Finisihed rotor installed between stator-coil walls:
