Fan adapter 120 mm to 140 mm with offset

Motivation

I created this as a another variant of an adapter to mount 120 mm fans on a 140 mm radiator.

I have offset the fan from the middle to create a bit more space for the mainboard, which was in the way when mounting fans directly or with an adapter without offset.

Information on the dimensions and usage

The total height is 15,6 mm.

The holes on the 140 mm side are made specifically for some screws which came with the be quiet 900 rev2 tower (I think they are intended to be used with the HDD cages).

The 120 mm side holes are meant to be used to by M3 screws directly screwing into them (I used the ones from the original radiator fans). This works well on the first time but with each mounting, they will grip less.

The form follows the opening of the Noctua A12x25 mm, so that there is no additional restriction (I hope, I'm not an airflow specialist).

Information about the print

I've printed this in TPU with 50% gyroid infill which came out quite well. The print is with Overture HS TPU, using the default settings of Generic TPU in Bambu Studio. The second print (the one in the pictures) was done with a volumetric flow of 7 mm³/s, which is too much for a really nice quality. The first print with the default flow was a lot nicer, but took 3 hours instead of 2.

There is an issue with the Bambu slicer with this model as it seems, as there were two areas where the printer would not slow down to overhang speed. You can see the distortions in the second picture. Not sure what was going on there. I printed this without supports.