J-Head Dual 40mm Fan Cooler

thingiverse

This dual 40mm fan filament/J-Head nozzle cooler suits the Prusa i3 with an MK IV J-Head hot end and Greg's Accessible Extruder. It delivers 330 degrees cooling to the filament, featuring one fan for J-Head cooling and another for filament cooling. The design also offers a mirrored version of DualFanFlowDirectors360.stl file for using 40mm x 40mm x 20mm fans instead of 40mm x 40mm x 10mm fans. Printed in four pieces, the DualFanFlowDirectors360 part is printed with a 0.35mm nozzle at 0.3mm layer height for better success rate on steep overhangs. After successful printing, the DualFanShroud, DualFanFlowDirectors360, and FilamentCoolingDuctDifuser are super glued together, while the DualFanMount snaps onto the J-Head and fits into extruder's screw holes. The DualFanShroud then snaps into the DualFanMount, and the FilamentCoolingDuctDifuser encircles the J-Head's nozzle. However, it is not compatible with J-Head MK-V due to size differences.