Sleeve Bearing vs Ball Bearing: The Difference in Cooling Fan Use
Ball bearings are rolled through metal beads, belonging to the rolling friction, the contact surface is small, the friction coefficient is small. The sleeve-bearing sliding friction, contact surface, a long time, the oil will quickly evaporate, easy to over-bearing wear and increase the friction coefficient, the noise will be bigger and bigger, the shorter the life expectancy.
Ball bearing cooling fans usually require two bearings, single ball bearings, or sleeve-bearing components, while double ball bearings are more advanced than single balls. Generally in the same environment, the general life of sleeve-bearing 25,000 hours, 30,000 single ball bearings, double ball bearings for more than 50,000 hours.
Sleeve bearing cooling fan is sintered from copper-based powder, you need to add lubricant to reduce the number of sliding friction, if the fan does not add long-term lubrication, it will make the bearing oil volatile and dry, increasing friction, Fan operation is not smooth, there will be slower speed or not turn phenomenon. The ball bearing is replaced by rolling friction sliding friction, friction coefficient to improve the small friction coefficient easy to change the shortcomings, and therefore strong operational stability, life expectancy is much longer.
