This page takes a closer look at the Enlobal Warp 120mm PC Case Fan and provides additional images.
Enlobal Magnetic Barometric Technology
As you can see below, when the case is separated from the fan blade, it reveals four distinct magnetic "shoes" situated equally around the diameter of the case housing. It also reveals four copper coils positioned behind each of the magnets.
Second, when we take a look at the fan blade itself, we see the magnetic ring:
The magnetic ring on the fan blade, when positioned over the four magnetic shoes on the case, produces bearing-less fluid movement because the magnets are of opposite polarization. The center pin is for stabilization as it keeps the magnetic forces equal when the fan spins around the case. Note that the stabilization pin (i.e., the shaft) also barely rests above a small magnetic hidden inside the shaft housing of the case.
A Winning Combination
With the a) stabilization pin, b) magnetic shoes on the case housing, and c) the magnetic ring, you do not need any form of ball bearings. The friction is open air due to the magnetic forces pushing / repelling themselves, so the chances of friction breakdown barely exist, if at all.