"DC Fan" traditional seal bearing fan in the course of wear and tear is more serious, prolonged use of low reliability. Nano-bearing effectively overcome this problem: ceramic bearing technology using nano-polymer materials and the full integration of special additives, the use of a die and sintering process is made, containing a ceramic powder, a firm, smooth, wear-resistant properties. Nano-ceramic bearing (NCB) has a strong high temperature capability, less volatile, which greatly extend the life of the fan, nano-ceramic bearing of a similar nature, more wear more smooth. According to tests, the use of nano-ceramic bearing (NCB) of the average life of fans in more than 150,000 hours.