TKFAN 4cm 40x40x20mm 4020 small dc 12v 40mm centrifugal fan blower

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$2.50 - $4.20 / Piece | 100 Piece/Pieces (Min. Order)
Air Volume:
0.72-2.16w , 2-4cfm , 4500-8500rpm
$5.00 /Piece | 1 Piece (Min. Order) | Buy Samples
Customized logo (Min. Order: 1000 Pieces)
Customized packaging (Min. Order: 1000 Pieces)
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Quick Details
Centrifugal Fan
Electric Current Type:
Blade Material:
Place of Origin:
Guangdong, China
Brand Name:
Model Number:
ce, RoHS
1 Year
After-sales Service Provided:
Online support
Bearing Type:
Dual Ball Bearing
Supply Ability
Supply Ability:
100000 Piece/Pieces per Month
Packaging & Delivery
Packaging Details
K=K cartons


TKFAN 4cm 40x40x20mm 4020 small 12v 40mm centrifugal fan blower

Product Description




Glass Fiber reinforced plastic


Operating Temperature:

Ball bearing:-30°C to +75°C

Sleeve bearing:-10°C to +70°C


 Life Expectancy

Dual ball:55000-60000 hours

sleeve:20000-30000 hours







Other size blower
size maximum air flow
18×18×4mm 0.004-0.006m³ min
22×22×18mm 0.020m³ /min
22×26×35mm 0.034m³ /min
30×30×4mm 0.007-0.021m³ /min
30×30×10mm 0.030-0.047m³ /min
40×40×10mm 0.060-0.090m³ /min
40×40×20mm 0.157-0.328m³ /min
50×50×15mm 0.081-0.104m³ /min
50×50×20mm 0.060-0.107m³ /min
50×50×25mm 0.067-0.157m³ /mini
60×60×15mm 0.100-0.120m³ /mini
70×70×15mm 0.080-0.160m³ /min
97×97×33mm 0.490-0.600m³ /min
Motor Protection

 (Selective purchasing):

1.Automatic Restart.
2.Reverse Polarity Protected.

Soft-restart function.

3.Water proof for IP55 IP65 
4.IC function RD ,FG and PWM control are available

5.Metal Grid.Plastic Grid

Company Information

Shenzhen tenkai group limited is a brushless motor product related enterprises in shenzhen city, the registered capital of RMB10.2 million, registered trademark TKFAN and TENKAI,has safety certification such as UL, CE, ROHS,Through the ISO9001:2008 quality management system certification, no bad credit records.
       TKFAN mainly make high-quality brushless fan, brushless motor .Product series are tiny fan ,quiet fan,waterproof fan,high power fan,high voltage fan,long life fan,etc.
       Mini fan, generally refers to less than or equal to 3 cm length of brushless dc fan.Smallest size fan of TKFAN is 15 x15x4mm axial flow fan, the smallest size blower of TKFAN is 18 x18x4mm blower (2017).Throughout the industry, the smallest size fan is 9x9x3mm made by Taiwan SUNON, the size is only small as your thumb.
       Quiet fan, which are widely used in household appliances, car navigation, looked up lights, portable handheld devices, etc.Because of these devices application environment tend to be quiet, so this kinds of fan have to quiet with enough airflow.It is generally believed to solve this problem from three directions.Can promise the airflow and reduce the noise by change impeller structure, an important example is EBM company from Germany make a speacial low noise fan according to the principle of the owl feathers which is using in building ventilation;Second, we can reduce electromagnetic noise by using circuit drive with sine wave . Third,use special bearing, few years ago,TKFAN has already started to test and use ceramic bearing, pure copper oil bearing, special plastic bearing, various bearing is applied in special field, slowly get some success, hope we can do better in the future.
       Waterproof fan, is applied in some special fields.Such as sea cruise light heat dissipation, high power LED lights, outdoor household humidifier, industrial humidifier, etc.General component is IP55 moistureproof and IP68 waterproof waterproof level.IP68 waterproof generally divides nano coating process and two kinds of epoxy resin sealing process.Details refer to my company waterproof fan is introduced.
      We have large air volume/pressure test system, and 16db background noise test room.These test system can be used for your final product testing,and it's for free.If you have other questions, please contact us, always welcome your guidance.




 1. 100 %  testing before the fan leave our factory


2. Good after services to every customer


3. We often give one-year warranty on quality of products, and will give your refund if any quality problems occurs when you receive our items.


1  What are kinds of cooling fan or centrigugal fan supplied by your company?

Answer: we can provide DC cooling fan,  AC cooling fan, EC cooling fan and blower fan.


2  What are kinds of information provided by the customer before inquiry?

Answer : please kindly advise the size, voltage,  the type of bearing, the speed of fan , or air flow.


3  How many  types bearing of our cooling fan are there in our compnay at present?

Answer : now we have two types bearing for the fan, sleeve and ball,  working time of sleeve is for 30,000 hours, the ball is for 50,000 hours.


4 How to detect the data of cooing fan in your company?

Answer:  the speed and voltage are detected by the tachometer, air flow is found by wind tunnel.


5 How to control the quanlity of products in your company.

Answer:  100% total testing before each of fan leaves our factory.


1. The fan will be delivered by express ( FedEx, DHL, DHl or TNT )  for under 100 kg, our  shipping agnet  have perfect discount with these express company.


2. Large Measure are shipped by ship or by air as customer's requirements.


3. The fan can be dispatched by our truck driver if your factory is in Shenzhen, Dongguang or Guangzhou City.