I designed this fan to improve airflow for dust extraction on a ER20 collet spindle, as most chinese 2,2kw spindles are. when placed, the nut and 2 flat sides stay accessible for toolchanges. i have to admit that i printed this on a Markforged onyx one, with lichtweigt onyx
to prevent for imbalance, but probably usefull in conventional plastics on regular printers too.

Markforged onyx one

Doesn't Matter

Yes

0.1mm

30%