Fan Bearing Types


Fans are an important component type used to keep your system within its recommended temperatures, ensuing that your electronics work optimally and last their full operational lifetime. Put simply, a fan works by rotating its shaft with a bearing.

A bearing is a mechanical part used between the moving object such as the fan’s rotating shaft and the housing that shaft is moving within. The bearing’s aim is to limit the mutual mechanical movement between shaft and housing during operation and then reduce the friction between these moving parts. There are 5 popular bearing types used in the rotating shaft in fans currently -

  • Ball - Assembled with multiple balls. They are not easily worn and can be operated in any orientation and tolerance at higher temperatures. However, ball bearing fans have a more complicated structure and are more expensive

  • Hydrodynamic - Separated by liquid or air. Generally used for long-distance high-speed operation and rotation.

  • Sleeve - Separates the motion device (shaft) with a sleeve. Sleeve bearing fans are inexpensive, rugged and simple, with less acoustic sound during operation, but require regular maintenance, such as refueling.

  • Vapo-Bearing - supplied specifically by Sunon. Adds a magnetic effect (magnetic levitation) to the bearing to reduce sound and shaft stability

  • The Sintec - SINTEC bearing contains two precisely aligned bearing positions and a lubricant layer. After the shaft is started, a dynamic lubricating film is generated to prevent friction between the bearing and the shaft, so that high temperatures and non-aging can be prevented, and the high-viscosity lubricant penetrates the porous bearing to effectively reduce wear.