Prusa I3 MK3 Extruder Motor Fan Duct
thingiverse
The Prusa MK3 is very nice. But so many direct drive extruders get warm and the MK3 gets HOT!!!. 135F at the extruder motor recorded. This is when I couldn’t get accurate small PLA to print without becoming mush in the extruder teeth. I made this fan shroud to do all I could. A heat sink and silent 40mm Noctura fan added to the extruder motor along with a 25mm Fan (LOUD) to cool the filament and Bondtech directly. All the “exhaust” heat flows out away from the print surface to help hold the temperature of sensitive prints. This has dropped my extruder temperature from 135F (measured at rear of extruder motor) to 37F while printing PETG. Mmmm thAT’s WhaT I CalL eFFective!
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