In the mainstream of thermal solution, cooling fans take a major place. When choosing a fan, fan longevity, mounting, noise and rotation speed are factors to consider. And life expectancy is one of the most important factors of fan’s performance. Bearing system and the working environment are dominants of fan’s life expectancy.
TWO BALL BEARING:
Ball bearings consist of two hardened metal rings, one inside the other, separated by a set number of perfectly spherical steel balls spaced equilaterally with a bearing cage. The balls run along concave grooves set into each of the rings. There is a thin film in the ball system that could reduce the friction, dispatch the heat, prevent corrosion and extend the bearing life.
Higher temperatures tolerance
Longer lifetime
Higher cost
Higher noise level
SLEEVE BEARING:
Sleeve bearings are fundamental in design and are used commonly in thermal solutions. These bearing are made of hard metals that are typically pressed into porous forms by powder metallurgy. The bearings are generally impregnated with oil which could be lubrication to reduce friction.
Affordable and cost-effective
Maintain a relatively quiet noise level
Volatile at fluctuating temperatures
DURO SLEEVE BEARING: