Introduction: dual ball bearing, bearing import knowledge

Double ball bearing belongs to more high-grade bearing. Several of bearing small steel ball around the axis, when fan page or axis of rotation, steel ball is followed. Because is a sphere, so less friction, and there is no oil leakage problems. Double ball bearing fan advantage is life longer, about 40000 ~ 55000 hours; Anti-aging performance is good, suitable for high speed of the fan. Double ball bearing fault is the manufacturing cost is high, and the great noise at the same speed levels ( Because the ball bearing spot increased 2 times. )