Auto Vacuum Parts Features: 1) Shaft type: solid shaft, hollow shaft, multiaxial shaft 2) Housing type: flange type, bol Auto Vacuum PartsVacuum PartsBearings components/Vacuum PartsFerrofluid sealed gearing is a product based on the ferrofluidics technology. When ferrofluid is injected into a gap in the presence of magnetic field, it can form a liquid barrier. The ferrofluid sealed gearing just ...