Hexagon 25mm fan shroud for prusa i2

thingiverse

Fan shroud for the Hexagon hot-end, designed specifically for a vanilla Prusa i2 x-carriage. It perfectly fits a 25mmx25mmx10mm fan. I encountered difficulties finding a shroud that would fit the i2 x-carriage. The designs I came across had the top of the fan level with the collar that interlocks with the metal mounting plate for the Hexagon, but for the i2 it needs to project down a bit further in order to fit in below the carriage body without interfering with the screw that fixes the extruder to the carriage. Before realizing any of this, I had already printed http://www.thingiverse.com/thing:796756 and was impressed by how well it fit the hexagon otherwise. So I cut it in two and added an extra 8mm of angled ducting to fit where I needed it to go. Custom Section Instructions Print 'prusa-hexagon-shroud.stl'. Screw holes are deliberately slightly undersized. I tapped them to M3, but you could also clean them up with a drill bit and use small self-tapping screws. Mount over hexagon heat-sink fins from the top. The rounded end will rest on the topmost fin. Put together your extruder/hot-end assembly on the carriage before mounting the 25mm fan or it will obstruct access to the mounting screws.