The file 'Milwaukee 2804-20 Rotor Bit Holder 3D Printer Model' is (stl) file type, size is 46.3KB.
I used the rotor out of my broken 2804-20 Milwaukee drill. The magnet in the rotor holds the bits in place, and the bearing fits perfectly onto the base so it spins.
rotor_bit_holder_280420.stl | 214.2KB |