Geeetech Prusa 40mm Part Fan

thingiverse

Searched far and wide for a straightforward 40mm fan mount that would effectively cool layers, but none of them were easy to install. Finally stumbled upon this fan mount by Trollendrop, which had everything I was looking for, but found the all-around cooling was positioned too high above the hotbed, and the twisted design inside hindered airflow pressure. Cut off the outlets and replaced them with a single small nozzle pointing directly at where the filament emerges. This modification allows for potentially much higher airflow, which should cool sufficiently. Requires a mounting plate from Trollendrop's original design. UPDATE: Added an extension piece to position airflow closer to the hotend. A 0.25mm clearance ensures it will slide on and stay in place.