Inline Vacuum Air Filter Enclosure

thingiverse

I wanted to add another level of air filtration for a dust extractor for my small CNC mill, so after the first stage cyclone filter (from thingiverse) and before the wet/dry vacuum, this provides an enclosure to hold a secondary air filter to trap as much fiberglass dust as possible. The design is fully customizable, but with the uploaded settings, it fits the [86889 EF-1 Filter for Kenmore 53295 40324 20-86889 KC38KCEN1000 8175062 610445 Replacement Panasonic Part MC-V199H MC-UG725](https://www.amazon.com/gp/product/B071HGS476) or similar part. Adjust the filter dimensions, if you want to use a different filter, and the input and output ports are customizable (both inside and outside diameters). Be sure to make multiple measurements across the filter (length/width/height) and use the largest measured dimensions, adding a little padding, if desired, to allow for filter manufacturing tolerances. The current version doesn't compensate the funnel wall thickness based on the slope of the input and output funnel, so you may need to make the wall thickness high, but if you keep the slope near 45 degrees you can print it without any supports. This is only my second parametric design, so please comment, remix, or fix as desired! If you really want to make it elaborate, you can offset the inlet and outlet from the center or even tilt them a bit, but I haven't built that into the customizations at this point. The hull() feature in OpenSCAD is a powerful way to transition from one shape to another without generating highly complex geometry.