3. Life Expectancy: Dual Ball Bearing: 50000 hours
Sleeve Bearing: 20000-25000 hours
4. Standard: Fully CE, ROHS Approved
120mm 12v centrifugal fan detail
Packaging & Shipping
Packaging : brown cartons or according to customers advise
1.The sample will be shipped by express, like FEDEX, DHL, UPS and EMS. And the freight should be paid by clients. 2.The mass goods will be shipped by air for any emergency, the freight will deal with you for the concrete condition. 3.Usually,the products will be shipped by sea.
Qifang Company Brief Introduction a. was published in 1992,has been one of the professional and experienced manufacturers and designers of AC/DC cooling fans in China for about 22 years; b. Production Capacity:DC/AC cooling fan 10,000-12,000 pieces per day;Blower fan 5,500-7,000 pieces per day; c. 12 professional engineers and 2 study labs,8 sets automatic production lines,26 advanced researching&testing equipments; d. Products have obtained the certifications of UL,RoHS,CCC,CE,ISO9001; e. Be popular with two registered trademark “QF” and ”QFDJ” across the world.
Production line of the cooling fan
Canton Fair Show
Q1:Are you a factory or trading company? A:We are a factory with 22 years' experience.
Q2:What are the products of our factory ? A: The products are Dc cooling fans , Ac cooling fans, Blower cooling fans, Cpu cooling fan, VGA cooling fan.Our fans from 40mm-220mm . We can also do cooling fans as customers' requirement.We are honored to offer you samples.
Q3:What characteristics determine the lifetime of the fan? A:In a well designed fan, the lifetime of the ball bearing is the limiting factor in the lifetime of the fan. Bearing life is related to the size of the bearing, the speed of the fan, the load of the fan, the grease used, and other factors.
4. How do we carry out quality control? Usually, there are two ways to monitor reliability during the manufacturing process. * Early Life Test This is used as a mean of process control aimed at identifying any latent manufacturing problems and determining the effectiveness of burn-in. Every day, 5 samples will be picked up randomly from one of the production lines for burn in at 50°C+/-5°C for 24 hours. *On-going Reliability Demonstration This is a longer-term program aimed at providing data on continuous basis to demonstrate the reliability of product. 10 units per month are randomly collected from one of the production lines for burn-in for 168 hours at 50°C+/-5°C. Units are monitored and tested on daily basis. Failed units will be analyzed and corrective actions taken where necessary.
5.What is the divery time Sample lead time:3-5 days Mass production Delivery lead time: 1 -3 weeks(Depend on the quantity) Delivery Ways: DHL ,UPS Door to Door service ,By Air ,By Sea ,etc.
6. What can I do if we can not find the suitable fan model in the fan list? Please contact us for customized fans. * If you want another rpm or voltage or other reqirement,pls contact me for more details,thanks! * For Special Cooling Fan,Such as: moistureproof, waterprrof, turbocharger, soft start, Reversible, temperature control, PWM speed control, the RD alarm and the FG signal etc,pls contact me freely.