Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:2673286.

This is an adapter to allow using a 30 mm fan on a flying bear dual hot end. The existing set up used a 40 mm fan that was noisy and put a lot of air on the hot end and bed. I tried to minimize the air flowing downward.

This thing has only been on my machine for a short time, so I can not tell how it would do on a long print job.

Feedback is greatly appreciated.

The fan is mounted to the adapter with M3x12 bolts. The adapter is mounted to the hot end with M4 x 10 bolts I believe. See the exploded view for details.