21. More esoteric designs use an air bearing , where the spindle is supported by a high pressure flow of air. 22. However, in order to allow a uniform air pressure even with only some nozzles, air bearing manufacturers take constructive techniques. 23. Recently AeroGo air bearings were used to move seven-story concrete caissons to form a breakwater at the Port of Yokohama. 24. In addition, air consumption and uniformity of air supply into the gap are crucial for the behaviors of air bearings . 25. While the disk is spinning, the heads are supported by an air bearing and experience no physical contact or wear. 26. Micro nozzle air bearings have a velocity limit which can reach, depending on the customization, dozens of m / s. 27. An experimental design by Autonetics using air bearings , that they claimed had been running continually from 1952 to 1957, was chosen. 28. Micro-nozzle air bearings achieve an effective, nearly perfect pressure distribution within the air gap with a large number of micro nozzles. 29. The force that the head mount imposes on the air bearing is much larger than the G-loads imposed bythe external vibration. 30. However, for air bearings with chambers and variable canal structures, a velocity only of a few m / s is already harmful.
