I've made these objects to convert a pvc bucket to a cyclone for a vacuum cleaner.
This way i'm able to prevent my vacuum cleaner to clogg up when using it drilling stuff in my garage.
I was planning on using it for the foldable cnc but in the end i decided to build a small vacuum cleaner to fit on the cnc.
The bucket inside diameter is 31cm and needs to be one with a closing lid.
The adapter outside diameter is 34mm.
You need to create a hole in the bucket that lines up with the slice.
I've used glue and a couple of parkers to make sure the slice stuck at it's place.