<p><a href="https://www.alibaba.com/product-detail/120mm-Small-Squirrel-Cage-Exhaust-Plastic_653850349.html?spm=a2700.7724857.normalList.14.23834341IiKFAu&amp;s=p" rel="nofollow noreferrer">https://www.alibaba.com/product-detail/120mm-Small-Squirrel-Cage-Exhaust-Plastic_653850349.html?spm=a2700.7724857.normalList.14.23834341IiKFAu&amp;s=p</a></p>

<p>After quite a bit of searching the above link from Alibaba was all I could find. I suspect that they don't make them like that because of the direction of the rotation of the blades. Perhaps they are made so that the rotor can be swapped around if necessary.
<a href="https://i.sstatic.net/HCQAA.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/HCQAA.jpg" alt="Centrifugal Fans with different rotors"></a>
(<a href="https://i1.wp.com/www.homeintheearth.com/wp-content/uploads/2012/11/CentrifugalFanTypes.jpg" rel="nofollow noreferrer">https://i1.wp.com/www.homeintheearth.com/wp-content/uploads/2012/11/CentrifugalFanTypes.jpg</a>)
The different curving of the blades affects either the volume or the pressure of the airflow (or both).</p>

<p>Alternatively how about one that is more agnostic:
<a href="https://rads.stackoverflow.com/amzn/click/com/B07RNZF97F" rel="nofollow noreferrer" rel="nofollow noreferrer">https://www.amazon.com/2Packs-Wathai-40x40x10mm-Brushless-Centrifugal/dp/B07RNZF97F/</a> 
<a href="https://i.sstatic.net/AeEH0.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/AeEH0.jpg" alt="Wathai 40x40x10mm 40mm 12V Brushless Turbo Blower Centrifugal Fan 2Pin"></a></p>

<p>Or just 3d print your own housing!</p>

CC BY-SA 4.0
2020-05-19T07:35:14.203Z
Worth noting that those "more agnostic" fans are the same as used on Creality printers.
ikrase
CC BY-SA 4.0
2019-09-28T12:10:47.030Z
2019-09-28T12:10:47.030Z
user77232
<p>I did also some research on this and decided to go with this solution. This fan only measures 50x50x10mm and is easy flippable: <a href="https://de.aliexpress.com/item/1005001894771961.html" rel="nofollow noreferrer">https://de.aliexpress.com/item/1005001894771961.html</a></p>
<p><a href="https://i.sstatic.net/WYQaY.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/WYQaY.png" alt="enter image description here" /></a></p>
<p>Another option was this: <a href="https://de.aliexpress.com/item/4001185014078.html" rel="nofollow noreferrer">https://de.aliexpress.com/item/4001185014078.html</a></p>
<p><a href="https://i.sstatic.net/wHwkP.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/wHwkP.png" alt="enter image description here" /></a></p>
<p>Also found a Thingi, where people tried to flip the existing 5015 blower fans. It seems very difficult, since you have to print the fins in flipped direction and they tend to break.. <a href="https://www.thingiverse.com/thing:3716277" rel="nofollow noreferrer">https://www.thingiverse.com/thing:3716277</a></p>
<p><a href="https://i.sstatic.net/doFXv.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/doFXv.jpg" alt="enter image description here" /></a></p>

CC BY-SA 4.0
2020-12-31T11:00:05.540Z
2020-12-31T11:56:01.120Z
2020-12-31T11:56:01.120Z
Tomblarom
<p>Yes these do exist, but I've never seen them in the size you are interested in, see e.g. these projector fans:</p>

<p><a href="https://i.sstatic.net/Jw36Y.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/Jw36Y.png" alt="enter image description here"></a></p>

<p>An alternative are fans that attract flow from both sides, like:</p>

<p><a href="https://i.sstatic.net/hryYg.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/hryYg.jpg" alt="enter image description here"></a></p>

<p>but I've not seen them in the small size you are interested in.</p>

<p>Considering the placement of the fans in the printed cooling duct you posted, I see no problem in using 2 similar fans. There is enough free space to suck in air and if you are afraid that the wires are caught by the impeller, you need to properly fasten the wires, ty wraps work wonderfully in securing cables. If I'm not mistaken, you could even use the holes in the fans to secure the cables or otherwise design and print a small bracket for attaching the ty wraps.</p>

CC BY-SA 4.0
2019-09-30T11:29:14.403Z
2019-09-30T11:29:14.403Z
0scar
<p>I have mounted two radial fan on my printer as a part cooling solution.</p>

<p><a href="https://i.sstatic.net/MTeZ5.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/MTeZ5.png" alt="radial blower fan"></a></p>

<p>As you can see, the fan has input on the left side and blows air down. Does a mirror construction exists? With outlet on the right.</p>

<p>I can even print my own casing, but I'm not sure if the fan will work, if I change the rotation direction.</p>

<p>I'm using this print cooling fan duct: <a href="https://www.thingiverse.com/thing:1850163" rel="nofollow noreferrer">https://www.thingiverse.com/thing:1850163</a></p>

<p>The fan on the right side has the opening facing the hotend, and there is not much space, so the impeller can catch on wiring etc. If the right fan had opening to the right, there would be no such problem.</p>

CC BY-SA 4.0
2019-09-27T06:06:01.357Z
Please explain by [edit] why you cannot flip the fan, e.g. the fan cannot be attached mirrored because the opening is then covered by the backplate. Else you simply flip it. Changing the direction of the fan will not work with a new housing.
0scar
CC BY-SA 4.0
2019-09-27T07:04:20.993Z
the integral part of the fan in the impeller, the spinning part. A lefthand fan needs to have also a mirrored impeller.
Trish
CC BY-SA 4.0
2019-09-27T08:05:58.750Z
Looking at the cooling fan ducts, I see no reason why to look for a mirrored fan. For that size they do not exist, I've seen larger fans which are mirrored, e.g. for projectors.
0scar
CC BY-SA 4.0
2019-09-27T09:51:30.247Z
If "wires catching" are the main concern, you could probably print a fan cover that mounts to the two holes instead.
towe
<print-fan>
Does right handed radial fan exist?
jnovacho
# Does right handed radial fan exist?

(Asked by: username_0 on 2019-09-27)

I have mounted two radial fan on my printer as a part cooling solution.

[![radial blower fan](https://i.sstatic.net/MTeZ5.png)](https://i.sstatic.net/MTeZ5.png)

As you can see, the fan has input on the left side and blows air down. Does a mirror construction exists? With outlet on the right.

I can even print my own casing, but I'm not sure if the fan will work, if I change the rotation direction.

I'm using this print cooling fan duct: <https://www.thingiverse.com/thing:1850163>

The fan on the right side has the opening facing the hotend, and there is not much space, so the impeller can catch on wiring etc. If the right fan had opening to the right, there would be no such problem.

**Tags:** print-fan
> **Comments:**
> **username_1**: Please explain by [edit] why you cannot flip the fan, e.g. the fan cannot be attached mirrored because the opening is then covered by the backplate. Else you simply flip it. Changing the direction of the fan will not work with a new housing.  
> **username_2**: the integral part of the fan in the impeller, the spinning part. A lefthand fan needs to have also a mirrored impeller.  
> **username_1**: Looking at the cooling fan ducts, I see no reason why to look for a mirrored fan. For that size they do not exist, I've seen larger fans which are mirrored, e.g. for projectors.  
> **username_3**: If "wires catching" are the main concern, you could probably print a fan cover that mounts to the two holes instead.  

---

## 3 answers

### Answer by username_1 on 2019-09-30. Score: 4 | Accepted answer

Yes these do exist, but I've never seen them in the size you are interested in, see e.g. these projector fans:

[![enter image description here](https://i.sstatic.net/Jw36Y.png)](https://i.sstatic.net/Jw36Y.png)

An alternative are fans that attract flow from both sides, like:

[![enter image description here](https://i.sstatic.net/hryYg.jpg)](https://i.sstatic.net/hryYg.jpg)

but I've not seen them in the small size you are interested in.

Considering the placement of the fans in the printed cooling duct you posted, I see no problem in using 2 similar fans. There is enough free space to suck in air and if you are afraid that the wires are caught by the impeller, you need to properly fasten the wires, ty wraps work wonderfully in securing cables. If I'm not mistaken, you could even use the holes in the fans to secure the cables or otherwise design and print a small bracket for attaching the ty wraps.


---

### Answer by username_4 on 2019-09-28. Score: 4

<https://www.alibaba.com/product-detail/120mm-Small-Squirrel-Cage-Exhaust-Plastic_653850349.html?spm=a2700.7724857.normalList.14.23834341IiKFAu&s=p>

After quite a bit of searching the above link from Alibaba was all I could find. I suspect that they don't make them like that because of the direction of the rotation of the blades. Perhaps they are made so that the rotor can be swapped around if necessary.
[![Centrifugal Fans with different rotors](https://i.sstatic.net/HCQAA.jpg)](https://i.sstatic.net/HCQAA.jpg)
(<https://i1.wp.com/www.homeintheearth.com/wp-content/uploads/2012/11/CentrifugalFanTypes.jpg>)
The different curving of the blades affects either the volume or the pressure of the airflow (or both).

Alternatively how about one that is more agnostic:
[https://www.amazon.com/2Packs-Wathai-40x40x10mm-Brushless-Centrifugal/dp/B07RNZF97F/](https://rads.stackoverflow.com/amzn/click/com/B07RNZF97F)
[![Wathai 40x40x10mm 40mm 12V Brushless Turbo Blower Centrifugal Fan 2Pin](https://i.sstatic.net/AeEH0.jpg)](https://i.sstatic.net/AeEH0.jpg)

Or just 3d print your own housing!

> **Comments:**
> **username_5**: Worth noting that those "more agnostic" fans are the same as used on Creality printers.  

---

### Answer by username_6 on 2020-12-31. Score: 1

I did also some research on this and decided to go with this solution. This fan only measures 50x50x10mm and is easy flippable: <https://de.aliexpress.com/item/1005001894771961.html>

[![enter image description here](https://i.sstatic.net/WYQaY.png)](https://i.sstatic.net/WYQaY.png)

Another option was this: <https://de.aliexpress.com/item/4001185014078.html>

[![enter image description here](https://i.sstatic.net/wHwkP.png)](https://i.sstatic.net/wHwkP.png)

Also found a Thingi, where people tried to flip the existing 5015 blower fans. It seems very difficult, since you have to print the fins in flipped direction and they tend to break.. <https://www.thingiverse.com/thing:3716277>

[![enter image description here](https://i.sstatic.net/doFXv.jpg)](https://i.sstatic.net/doFXv.jpg)


---

