_{Thanks to Fatalize for pointing this out.}

In Rebels Recon #2.19, LucasFilm's Pablo Hidalgo says that the inquisitors' lightsabers have repulsor lifts in them.

Q. Where are the crystals on the Inquisitors Lightsaber? It wouldn't work if the crystals were inside the main hilt.
A. Well the crystals aren't in the main hilt, I mean if you look at it, I'll just take it out here, the crystals are much closer to the emitterer ray, there's the main charge within the handle, something that pulls the charge as it spins closer to the crystal and then over here we've got this kind of repuslor lift assisted friction-less spinning, so that's basically what we're looking at in a inquisitor lightsaber.

_{Thanks to Fatalize for pointing this out.}

In Rebels Recon #2.19, LucasFilm's Pablo Hidalgo says that the inquisitors' lightsabers have repulsor lifts in them.

Q. Where are the crystals on the Inquisitors Lightsaber? It wouldn't work if the crystals were inside the main hilt.
A. Well the crystals aren't in the main hilt, I mean if you look at it, I'll just take it out here, the crystals are much closer to the emitterer ray, there's the main charge within the handle, something that pulls the charge as it spins closer to the crystal and then over here we've got this kind of repuslor lift assisted friction-less spinning, so that's basically what we're looking at in a inquisitor lightsaber.