3D Printer Cooling Fan, 40mm x 40mm x 10mm Blower Cooling Fan with 2 Pin Terminal for Hotend Extruder Heatsinks Makerbot MK7 MK8 CPU Chip (24V 0.06A)

Decent little fans. Do the job without making too much noise. Bought these after buying the USB 5V variants, which I loved. They all have worked and the couple used just keep turning so far. Not a whole lot to say about them, they are fans. They move air. They function. They were inexpensive.

One of the blades on the hot end cooling fan was missing and generated big noise with vibration. All my spare fans are 12V and decided to buy this from Amazon based on the reviews. Overall, they are powerful enough with acceptable noise. Now I replaced the one for the hot end and the one inside the control box. The original fan in the control box is still running well. But it generated too much noise after I swapped the board to be SKR Mini E3 V1.2 since it became ON all the time. Based on the price and its performance, I am pretty satisfied.

When I installed these on my 3d printer, I cut and crimped all 4 fans by normal convention (black negative, red positive). None of the 4 worked. However, I came back to Amazon and read through some reviews were talking about faulty wiring. I reversed the crimps in the JST housing and they now work perfectly! These fans have good air flow and are much quieter than the stock 4010 fan on my Voxelab Aquila (Ender 3v2 clone). Good value for the money. There's a slight high pitched whine, but it gets quickly drowned out once the parts fan, PSU, and MCU fans get going anyways. No heat creep even on long prints thus far.

Strategically placed two sets of fans (8 fans total) on a 20" by 24" steel enclosure housing three 6-amp 24VDC power supplies. Each power supply is pulling about 30% capacity under normal use, 70% under maximum load. Got enough airflow in the enclosure to keep the power supplies reliable. Side note: The plugs were snipped off, extra leads soldered, and the leads connected directly to screw terminals.

These fans do not output enough air to cool my 3D printer. I tested them with my bench power supply and they only consume 33% of the power that is stated in the description (they use 20 mA instead of 60mA). I contacted the seller and got a nonsense response with no solution. All four fans were defective in this way. I ended up having to order replacements from a different vendor since the return window closed.

I replaced my hotend fan on the Ender 3 Pro with one of these because my stock fan was making noise. After soldering in this fan in place of the Ender 3 Pro's original fan, I was met with a SIGNIFICANTLY more quiet 3d printer. There was also a lot more that came in the bag with the order. These things run quiet and push a lot of air for their size.

I was hesitant at first but after watching a tutorial on how to solder, even me, a kid, was able to solder. Relatively quiet and easy to put in. I'd recommend watching a tutorial if you don't know how to solder.

I only needed one of these to replace a fan that was worn down on my 3D printer. I really didn't feel like I needed more than one but it's one of the only things I've had to replace before so I'm sure I will use them in time. The fact is however that the cost of these 4 fans was less than what it cost for one from the maker of my printer. Great value!