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In the machinery industry, bearing range, but used bearing type on top of radiator just a few:
1, sleeve bearings (friction);
2, ball bearings (rolling friction);
3, magnetic bearings;
4, wave bearing;
5, magnetic bearings;
6, lucky bearings,
Magnetic bearings, water bearings, magnetic bearings, lucky bearings are also to improve the two above sleeve bearings and bearing made of, how it works and there is no change.
Now the normal cooling device primarily used the bearing bushing and ball bearings.
Oilless bearings
Sliding sleeve bearings bearings are used, used lubricating oil as a lubricant and drag reduction agent, when you start using low noise, low manufacturing costs, but the bearings are worn, a lot lower than the ball bearing service life. And this bearing a long time, because of the reasons oil seal (computer radiator are unlikely to use high-end seals normally is ordinary paper seals) lubricating oil will be increasingly volatile, dust will enter the bearings, resulting in lower fan speed, noise increases and other issues seriously eccentric bearing wear and fan will also trigger violent vibration.
Ball bearing
Changed the bearings with ball bearing friction, rolling friction, which is more effective in reducing the friction of bearings, effectively improve the fan bearing service life, and therefore to extend the life of the radiator. Deficiencies is the manufacturing process more complex, leading to rising cost.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7208B NSK | 40 | 80 | 18 |
| 7208A NSK | 40 | 80 | 18 |