A main shortcoming of an aerostatic bearing is it's limited load capacity and dynamic stiffness. This may lead to catastrophic situations under impact loads. Magnetic bearings are not only load limited but also extremely expensive. When design requirements increase hydrostatic bearings, even in their conventional form, offer high load capacity, both dynamic and static stiffness, damping and accuracy. However, in their traditional form the manufacturing cost is high including sometimes time consuming fine tuning.
Shear loses at higher speeds can also become unacceptable.
Sand cast before finish machining. The HydroBushing surface self-compensated bushing offers great advantages over traditional hydrostatic bearings. As the name suggest this design does not use capillaries or diaphragms to achieve load compensation. Everything needed is included in surface geometry of the bushings inner surface. This design is not prone to clogging problems but is self-cleaning.