Ender 3 X and Y Stepper Motor Coolers. Bolt and Noctua rubber mounts

thingiverse

I created these after installing stepper motor dampeners and discovering how hot the motors were getting without frame contact. Using Noctua fans with their rubber mounting system keeps them cooler, almost silent, and won't be heard over the hot end cooling fan unless that too is a Noctua fan. These mounts help keep temperatures low so your motors will last much longer. The design allows space for heat sinks to be attached to the motors, which I highly recommend as it's super effective! Your motors will stay room temperature even through the longest prints and feel cold to the touch. Regarding the heat sink attachment, CPU heat sink compound was used to maximize cooling potential. The heat sinks were attached using locking wire and made from cutting up an old GPU block. As for the fans, I've used two 12V fans wired in series to create a 24V draw required by my setup. This can only be done if both fans have the same current draw, which is true of similar fans of similar age. However, this method isn't the best way to do it because if one fan burns out, there's a big chance it'll take the other one with it. A simpler and safer way would be to use a buck converter to get your 12V or use 24V fans. The fans I used are Noctua NF-A4x20-PWM, which come with rubber mounts (PN: NA-SAV2). I've tested these for over a month with no problems. Please let me know of your experience with them in the comments and if you know of any 40mm 24V fan made by Noctua.