3D Printer Fans - AXIAL vs BLOWER (MUST KNOW)

Nice Video, thanks! I also loved the design of the TUSH-Style Spool Holder - can you please give me a Tip where to get the Files for this special one?

Is mine Give it back

Just found out videos and they are GREAT!!!!!!

I wish fans provided a cfm per watt rating.

the only reason your axial fan is not generating air flow is your bad duct design.
Google for "axial fan guide vanes" or "vaneaxial fan"
this is THE proper way to design a duct for axial fan. Quite surprised you didn't find this during the preparation, investigations (if any) and making of this video, as this is really the basics.

What about combining high performance axial fan with high pressure radial fan?
First one will provide lots of air with minor pressure, second will make use of the big flow with little pressure.

Which type is better for task whoch requires more suction power through small vents?

nice work)

your video helped I was searching for a 5.25 pc intake my case has only 2x 5.25 and two 80mm intake fans are not enough and I cant really find something on the market. So I thought of three designs 1. a 120mm fan but tilted inside downwards so it would suck the air in .2 120mm as a radial fan by covering the intake of the fan and remove one side of it and glue it to one 5.25 cover with an opening where the fan has an opening. 3. inspired by your video and the mac studio simply use two radial fans which suck the air in through the top 5.25 bay and push inside by the down 5.25 bay.

what happend when you put two axial together as one the airpressure should add up actually.

Great video!

It is incompetence. Looks at most printer frames. They copy the popular Prusa i3 frame design, which is inferior to a XY cube for instance. Why ? Just because they have always does that and it has worked so why change it ?

Would have been good to know the electrical comparisons of the fans. Voltage but mainly rated current. The amperage & RPM greatly effects the flow rate.

A difinet yes from me but the video is short😢

been printing for almost 4 years now as a hobby and have done almost every upgrade to my ender 3 i could find. never considered this at all but incredible information! i love the rigorous testing.

Based on your nozzle pictures and the cheap E3d V6 nozzles I got off aliexpress, and the fact that I am getting lots of buildup on the nozzle, I should try polishing them.

You are right, many just use tiny shrouds for axial fan. Even using radial fan I use the same mm2 surface area of this outlet when lofting 3D shroud in cad and smoothed it’s air flow path. Thanks for sharing 💕

I upgraded my ender 3 v2 with 2 5015 fans. They blew so much air that bridging was difficult. For the speeds an ender 3 v2 can acheive, a single 5015 fan will suffice. Lighter toolhead is more advantageous on a ender style printer than 2 5015 fans.

That is interesting information. Best way to find out the real life effects of something is to just test it in reality. Now I have to rethink my design.

You can also step up the 4020 axial fan to a 4028 axial fan. Even 70x35 radial fans look pathetic compared to good 4028 axial fans. For example ebm papst sells a 4028 fan which is still fairly quiet at rated 50dB but has over 4 times the air flow and over twice the static air pressure of the most powerful controllable sunon or gdstime 5015 radial fan. 38m3/h vs 9/9,1m3/h amd 520 to 550 (graph was awful to read on smartphone) Pa pressure vs 250 Pa on the radial fans. So in every case the axial fan will perform better as at every pressure value it has higher flow and at each flow value higher pressure. The downside of the axial fan is the hefty price of 55 euros and the sometimes difficult packaging

your "review" is bullshit. you never tested the fans with no restriction. you tested one fan against the other without knowing if they moved the same amount of air with no restriction. You didn't post the specs of the fans are they the same rpm and wattage? A higher wattage axial will have more static pressure. the blade pitch on the axial fans can drastically change the air pressure produced. I replaced my blower with a 4020 noctua and it pushes out so much air that i generally can't run it at 100. at 100% it will push the filament out sideways when loading filament. the stock 5015 can't come even close. i have to dial it back to 60% and then its a third the noise of the stock 5015.even at 100% its still half the noise. You obviously don't have a clue what your doing. You need to take into account the specs static pressure, rpm, air flow, stock noise and wattage of the fan you are selecting. Not just compare two rando fans to each other. there is a reason people choose noctua. they move alot of air at a good static pressure with less noise. go watch major hardware videos on the fan show down

You are creating restriction with the venturi type duct you test. If so you should test something like the 4028 fan which surpass most fans in these sizes. How ever it is not that simpel. You would want a certain air speed at the throat. And that should be what defines the ducts. Not the looks or what ever fits. Look into bernoullis princip and formula for pressure drop. Would give you more knowledge. Normally it is first or second semester knowledge on the engineering study 🤟

I see what you're saying but I like using 4 of my 40x40x56mm counter-rotating fans at 23000 rpm for part cooling.

just finished printing my extruder with axial fans........fuck

I can confirm noctua although a quiet fan, it sucks at cooling prints sufficiently even with the offset duct design.

put axial fan on a blower.

I just discovered your channel and subscribed right away. Great approach, science and empirical, and concise. Very well done and amazingly informative.

i use an axial 4028 server fan for my printer. Spins up faster, has more airflow, and almost as much static pressure as a 7530 flower.

Great video!

Thanks for the information. It's living and learning! I never thought about the differences between radial and axial fans for cooling in the 3d printer.

Here are some more data from my testing:

4020 axial fan to 30mm hole = 6.3m/s airspeed (no restrictions)

4020 axial fan to small duct to 30mm hole = 2.6m/s (small duct restriction)
5015 blower fan to 30mm hole = 4.1m/s airspeed (no restrictions)
5015 blower fan to small duct to 30mm hole = 3.6m/s airspeed (small duct restriction)

59% vs 12% airspeed loss when comparing 4020-axial vs 5015-radial.

If you go back and forth with the first 2 sounds you let us hear, it will sound like an old style dial up modem :) Nice look at the fans. Would be neat to see your take on what ducts actually work better than the stock setup on most printers. I found that most of them do worse than the factory setup on my Ender 5 probably due to the print speed not getting high enough to make the massive airflow worthwhile...at least that is my theory...

Welcome B-A-C-K! ✌✌

And yeah, I finally bought all parts to make my own "THE BEST DRILL GUIDE with CNC parts". :))) Another few months and it's gonna be done :D

Wow, new video :) That's always like a little holiday :)