I made this adapter to make the small hose on a shop vac work with my table saw's dust extraction port. I designed this adapter as simply as possible so that I could print it once and it would just work. Both sides are press fit.
This was purpose built for the shop vac and table saw I own so make sure to check the critical dimensions on your items match before printing.
Table saw side diameter: 2.3 inches
Vacuum hose side diameter: 1.45 inches
The author hasn't provided the model origin yet.