Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:2249317.

My table saw has a 40mm OD outlet for dust collection. This adapts it to the same taper as my adapter for the cyclone separator 34mm OD down to 29.5mm OD over 50mm.

Mine was printed in PLA, 0.2mm layer height, no supports and with a 5mm brim on my Anet A8. It's a nice snug fit.

As always FreeCAD file is here as well as the stl.