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In order to meet the fast development of machine tool industry, and industry needs for micro machining, ultra high-speed aerostatic bearing's speed now has more than 3 x 10e6 DN or the surface speed of the shaft for more than a 150m/s. However, because of the bearing clearance range between 5-20um and at such speeds, air film must have the ability to withstand very high shear rates.
This new design makes high-speed operation has improved, has the potential to increase speed limits and hard sex and lower operating temperature.
With increasing speed and shaft, bearings to reduce the minimum clearance from 28 UM 16 UM. Under the low-speed, bearing similar results and traditions. However, when you speed up to 120,000rev/min, belt, bearings, has a distinct advantage, but also has the potential to reach higher speeds. It is important, with combination of Groove rolling thrust bearing and thrust bearing of traditional, static rigidity. However, because of the slot feature, it consumes less energy.
In addition, due to the aerodynamic effects, the hardness increases as the speed increases. But traditional thrust bearings do not have this feature. First proof belt hole in the combined advantages of FAG bearings are used for grinding spindle rotor. Use, and compared to conventional air bearings, belt combinations can increase the rotation speed of FAG bearings 25% and current consumption is reduced cent.
People also will design a high-speed spindle for micro-devices to reduce the diameter of the machine to 50um. Of course, the slow speed and accuracy, as well as the operation of heat reduction are inseparable.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| NNU4948 NTN | 240 | 320 | 80 |
| NNU4944K NTN | 220 | 300 | 80 |