40mm x 40mm x 20mm 24V DC Cooling Fan 2Pin for 3D Printer 2-Pack | 4020 Axial Fans, 24 Volt Brushless, 6000RPM, Hydraulic Bearing, 40x40x20mm

Worked perfectly for install in a Soundcraft Ui24r. 2-wire plugs directly into the motherboard and turns on with the unit. Operates very quietly. Install fits perfectly. Airflow seems good.

Works flawlessly, perfect size, easy to install.

I've bought several used SMX APC UPS units for a project. One, that otherwise functions perfectly, was manufactured in 2010. This was the only one in the bunch that couldn't be upgraded to the most current firmware so I don't know if it's that or a faulty sensor but both fans spin at a pretty high speed all the time and really too loud to make it useable even in the out of the way spot I have it located. First bought a pair of fans and didn't read the product description closely enough (my bad). Fans weren't meant to operate 24 hours a day so bought two of these. Came with nuts/bolts long enough to mount for my use (other fans didn't) so installed them with some material between the fans and the device to reduce potential vibration noise. Now this UPS is the quiet one of the bunch. Yes, in this one they are always on but really not audible from more than a few feet away (others spin up intermittently and you can hear those from a distance). I've had the unit in use for a week or so since the install and seems to produce plenty of air flow (based on what I feel coming out the back), battery pack temps the same as the other units and just doing basic checks of running my hands across the case of the unit seems to be right around the ambient temperature in the room. Will update if there are any durability issues but so far so good!

Good quality for the price

I had a hotend cooling fan go bad on my 3D printer, and I wanted to upgrade it (My printer uses the same fan for hotend and part cooling, so more airflow is always better), and grabbed one of these. Not much to say, really... It fit in the same spot (Although it is much thicker than a "Generic" 40MM fan so it may not work for some printers), worked when I plugged it in, and although it is a little more noisy, it moves a LOT more air. Only real complaint was I wish the wires were longer. Would have been nice to just wire it right up to the control board, but instead I had to solder and heat-shrink them together by the hotend. Biggest problem I could see someone else having is either the fan not fitting in a smaller hotend like the one on the Ender 3, or accidentally buying this 24V fan for their 12V printer, in which case it would still work, but not move much air at all and may cause printing problems. Double-check your voltages!

I used this to replace the main processor board cooling fan on a Game King video poker machine. It's a perfect fit and is VERY quiet compared to the factory installed fan. The only issue is I had to cut the plug from the old fan and connect it to this new one. Not a big deal at all. So far I give this five stars. We'll see how long it lasts but for now it's perfect

I’m always happy with GDSTIME fans. I bought two of these to use as bed fans in my Voron Trident 300 and try are working flawlessly and didn’t increase the noise level too much. They are working great to circulate the air in my printer and keep temps stable. Two fit perfectly under my bed.

Noisey, but not annoying. Work on 24v off-grid system at 25-29v no problem.

works well