Windsock Coupling

*UPDATE 2nd Sep 2021
I had reason to print another of these, and found there was a flaw in the "shaft.stl". I have redesigned this part and replaced shaft.stl with shaftv2.stl.


OVERVIEW
This allows a small portable windsock to be able to be fastened to a make-shift pole and rotate easily as the wind changes direction. It was made for use a small one of these windsocks :

http://www.ebay.co.uk/itm/Large-Middle-Small-Size-Aviation-Windsock-Rip-stop-Wind-Measurement-Sock-Bag-/141996961057

and a 608-2RS bearing, like this :

https://www.123bearing.co.uk/bearing-608-2RS.php

Note: Non commercial/non derivative license.