I've struggled to connect several tools to my dust collector or shop vac. I've included several adapters that have worked great for me. Note: some parts should be printed out of TPU:
Bosch GCM12SD Miter Saw - This saw has a goofy dust port that I've never liked and haven't been able to reliably connect anything to. I designed adapters to handle two scenarios: 1. connecting to a standard 2-1/2" shop vac hose, and 2. connecting to a 2-½" flexible dust hose.
In either case, you will need to first print the file “MiterSaw-TPU Collar.3mf” out of TPU. This collar has openings that fit over the nubs on the saw's dust port. It fits tightly, so it will not come off.
NOTE: I planned to combine the adapters into one but couldn't maintain the wall thickness I wanted.
Ridgid EB44242 Spindle/Belt Sander - I have 4" flexible hose running from a blast gate and happened to have a 4" to 3" adapter that I purchased long ago. I made a TPU collar that fits snugly over the dust port on the sander as well as the 4" to 3" adapter.
No supports required.
The author marked this model as their own original creation.