Anycubic 4Max Pro circular fan duct

Circular fan duct based on the https://www.thingiverse.com/thing:4167848 Added additional mounting point on the opposite side to prevent it from sagging and for more precise positioning. There is a second threaded insert in the stock carriage already - just put an additional screw there.

It is recommended to use a silicone sock for the heatblock to isolate the fan duct from the heat.

You should use some heat-resistant material, as regular PLA will most likely melt. PETG/ABS/ASA should be fine. I used Rosa3D BioCREATE which is supposed to withstand 120°C and it works perfectly.

I use it only for the most demanding prints, because it is quite large and obstructs the view on the nozzle quite heavily, so it is difficult to see anything for the few first layers.

Print settings:
Print with "touching buildplate only" supports to support the air outlets and the screw mount. There are some internal support structures that allow to print this without any additional supports inside.