Review on 🌬️ Pack of 2Pcs - WINSINN Dual Ball Bearings 50mm Blower Fan Brushless Cooling 24V 5015 50mm15mm by Kevin Overturf

I used one of these on one of my 3D printers, the Creality Ender 3 Pro, by using the dedicated hot-end air duct on the gizmo (item 4725293 ) used ) in stock. The Creality v1.1.4 board manages it. The other will eventually run on the Tronxy X5SA. Good: price, both work, move a lot more air than the standard 4010 (obviously), not as loud as I thought. Starts consistently at 25% and speed changes seem fairly linear as you go to 100%. Bad: The noise doesn't really bother me, but there's a lot of hum when the fan is running at anything other than 100%. Compare the noise level with the original, but you can't hear the original because of the hotend fan. It's definitely a lot louder than the default sound at 100%, but it's so much more air that it's worth it. I hope this squeaking doesn't indicate an imminent fan problem as I'll be running it at varying speeds most of the time.