Brushless "DC Fan" single ball bearing brushless fan, brushless fan to Fu bearings, hydraulic bearings brushless fan, nano-bearings brushless fan four. Typically brushless DC fan specifications are 6cm, 7cm, 8cm, 9cm, 12cm minority radiator started using large diameter fan, fan size and provisions usually four-digit identifier. Core technology is the fan bearing technology. Bearing fan is the largest part of the cost. Many different types of fan bearings, we introduce some of the most common: a single ball to Fu bearings, double ball bearings, hydraulic bearings, nano-bearings.