WINSINN 40mm Fan 12V Hydraulic Bearing Brushless 4010 40x10mm - High Speed (Pack of 5Pcs)

Having used these on a few 3d printers what initially seemed like a quality replacement, after a month of daily printing on the 3 printers i fitted them on - Ender 3's and Voxelab Aquila, they started becoming noisy and struggled to spin up to speed.Sometimes during the print you could actually hear them stutter and on a few occasions actually caused heat creep, i could tell as when i restarted the print after chopping filament and printer had cooled it would print perfect again. I'm quite experiended with 3d printers and it wasn't something like a clogged nozzle, it was purely because the fan was stuttering.Sadly these aren't great quality, a month of use (probably 10 hours a day) shouldn't mean these fail, they are cheap and i guess if you don't use them as much as me they will be ok, but for 3d printers, they a) don't last long enough and b) don't push enough air which i think its a major flaw for use in hotend cooling.I mean maybe i got a duff batch, but all 3 i have installed so far have some sort of whirring stutter and on 2 of the 3 have suffered heat creep occasionally because of the stuttering fans.

Well they work. But on the downside they are reluctant to start at anything less than 50% speed and the wire is only about 300mm long so you will need to splice to existing wire. Is there a printer out there with the control unit that close to the print head?? If you are okay with these minor issues they are fine for the price.

Sounds like a broken one after a few minutes of using

Short lead is not ideal for an ender 3 but does at least have a plug on the end. I have now rigged up a connector near the hot end for quick and easy extruder fan switches, since these cheap fans give up so easy (seem to range from 1 to 6 months).Its noisy but seems to be moving the air much better than previous other fans I have tried. I can live with an increase in noise if they perform well.5 for £10 and prime next day so good value

Purchased this to add cooling to a Raspberry Pi case I had printed for an OctoPi configuration.Little bit noisier than I anticipated but fan clearly has god bearings as I think moat of the noise is air rush

Purchased to replace a fan on my Ender 5 Pro. They are incredibly noisy compared to the original fan, and I can hear it downstairs when I'm in bed, and even noticed I could hear it before I opened my front door to come in. The airlflow seems a lot higher than the stock fan. Does the job, but sounds like someone is playing with a quad-copter.

I bought this pack as I needed some fans for my Drivinator for the Ender 3. I was pretty happy for a month or so but after then the fans have become increasingly noisy. At some points the noise is unbearable when working close by.I've sprayed a lubricant into the fans to attempt to resolve the issue and it doesn't appear to have worked however I wonder how long for

I love this fan except that it is noisier than my original 3d printer Wanhao fan. The set comes in a nice box which can be reused. The rottor seems like it's spinning much faster in comparison to other 24v fan I ve got, it creates more air flow as the noise comes from the air it moves and not the mechanism or bearings. Maybe a note to the manufacturer to adjust the angle of the blades. Overall good quality. Time will tell how long it lasts.