I made this vacuum connection for my Bosch GCM 8 SJL miter saw. It is parametric, in the sense that you can change parameter for the vacuum hose diameter, and the STL will update accordingly.
You can do that in Onshape, following this link: Parametric Connection
Go to the tab vacuum attachment, and change parameter called Vacuum_opening.
As it is now it is set to 33mm, and it fits a vacuum hose with outer diameter of 30mm. I suggest you make the opening 2-3mm larger than the actual hose.
How the connection work:
Print the adapter, and insert it in the hose connection at the back of the miter saw. I will guess it might fit other miter saws, at least Bosch saws.
Print the vacuum connection and screw it in the adapter. Now the vacuum hose will fit, and stay in place with friction. Very easy, and no need to make any changes to your saw.
I might make attachments with bend/angle later if needed.
PETG is the better option, though PLA should work. Many walls, and low layer heights due to the threads. 0.12mm is recommended. It still prints quite fast.
The author marked this model as their own original creation.