Geeetech Dual 5015 fan duct w/ dual 40x20 hotend fans & sensor (A10M/A20M)

thingiverse

This a collection of my A20M hotend upgrades including my dual 5015 fan duct remix and upgraded dual 40x20mm fans for the hotend heatsinks. Geeetech uses the same metal cage design for A10M & A10/A20/A30/A30-Pro, so this *should* fit all of those models as well. Includes optional 12mm NPN sensor bracket & cable management/strain relief. If you print this, please comment or post a make, because I would love to hear how well this works on the other printer models. **PETG, ABS or better Required** Fan duct requires at least PETG or ABS to withstand the heat. Even with PETG, the tips of the duct may sag slightly over time and require occasional printing of a new duct, especially if printing regularly at high temps. **Silcone Sock Required** With two 5015 fans you will **absolutely** need a silicone sock to shield your heat block from all the extra airflow. Printers using a V6 style block can buy silicone socks fairly easily. For the A10M & A20M I recommend this mold I've been using (https://www.thingiverse.com/thing:3569700) with Smooth-On Mold Max 60 for the silicone (https://www.smooth-on.com/products/mold-max-60/) Assembly Notes: 1) The hotend fans are mounted to each side using M3 bolts through the slots of the metal cage/box holding the hotend. Washers & nylon lock nuts are recommended for the inside. 2) The fan offset bracket is for the left-hand side and bumps the fan forward just far enough to clear the endstop and pulley cover for the X-axis. The fan intake duct with the flat side is also for this side, if desired. 3) The flare of the intake ducts slightly blocks inserting of the mounting bolts, but are thin enough to be slightly flexible. The easiest way to install is to insert all of the bolts at an angle through the intake duct piece first, and then mount everything together. Edit 10/3/2020: Added slotted version to accommodate about 2mm of height adjustment.