I designed this adaptor for an old Einhell Lamello milling machine. The old connector for dust extraction was broken and needed to be replaced. Therefore I took the dimensions with a caliper from the machines exhaust.
This is the second Version of this design. The first one did not fit that well and the part guiding away from the machine to the vacuum cleaner reached out over the machines table.
Now it fits and doesn't interfere with normallly handling the machine. I also added a small surface at the bottom of the part for a name sign or a label.