5015 to 40mm Fan Adapter
thingiverse
I noticed that the MK2.5/MK3 had very poor hotend cooling, which made heat creep a real problem in my enclosure. I'm running an original Prusa MK2s MMU modified with Zaribo and MK2.3 mods. The issue is that the hotend heatsink has many airflow restrictions and standard 40mm fans have low static pressure output. A 5015 blower fan can maintain higher static pressure, actually forcing air over the heatsink. Make sure to print on the large flat area of the heatbed. This upgrade requires four M3x14mm screws for mounting onto the existing fan mount and two M3x20mm screws for securing the 5015 blower fan.
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