The inexpensive Scheppach workshop vacuum comes with a cheap, sad, thin hose. To use the vacuum's full capacity, a wider hose can do a lot of good. This adapter allows you to put a serious 60mm hose to use on your Scheppach ASP-30-*.
While we are on it: Another sad detail about the ASP-30 is its dust filtration capability. Check out my cheap dust cyclone project if you want to solve that! :-)
Tip: If the adaptor does not sit totally tight in your vacuum socket, one round of (electrical) insulation tape around its base can work wonders! :-)
I strongly recommend to use a brim.
I designed this part in TinkerCad out of stock parts from the TinkerCad library. If you want to adapt the design to your needs, go ahead and tinker it! :-)