I liked the design of Dronnn's cyclone, but the bottom part was too tall and cumbersome. I thought that just a flat flange would do fine. 2 models included - bottom flange goes on the underside of your container's lid, and the top acts as a screw base for the cyclone body

Bottom piece was modeled in onshape using a flat extruded cirlce with holes, and excess material removed with "lighten" addon For the top piece, i cut away the threaded part of an original bottom model and merged it with a slightly altered bottom flange in the slicer. The thread's scale is unchanged, so it should be the same as the original.

Printing: any solid material like PLA or PETG, perimeter count and infill% should be set fairly high for durability. Layer height - any for bottom piece, and something like 0.2mm for the thread (i used variable layer height to speed up the print)

Post-process: apply some light grease or silicone spray lubricant to the thread. The flange is attached using M5 screws, if the holes are too tight - use a 5mm drill to widen them a little. Printed at 100% scale, the parts screw together fairly tight when lubricated

I used this cyclone with a cheap shop-vac to collect wood dust and chips produced by a CNC mill, circular saw and plunge router, as well as regular dust and dirt. It works nicely, with only very fine dust getting inside my vacuum.

Models seen in the photos:

Main cyclone body is from https://www.thingiverse.com/thing:2829268

1.Spiral-less cyclone top piece, works just fine https://www.thingiverse.com/thing:5767051 2.Air valve to prevent your containter from imploding https://www.printables.com/model/46697-zyklon-unterdruckventil-cyclone-vacuum-valve 3.Simple hose end fittings, with rotating interchangeable tips https://www.thingiverse.com/thing:3074386/files 4.OpenSCAD customizable hose adapter https://www.thingiverse.com/thing:1246651/files Interchangeable hose tips are made by merging the tip insert piece from (3) with a custom adapter piece from (4)