A cyclone saves collection bags by diverting the bulk of the dust to a vessel upstream from the vacuum or dust collector. Most people who have them buy them as attachments because they are not that expensive. But Cosmas Bauer is not “most people”; he’s one of those guys who likes to build his own equipment.

We covered Bauer’s home-made metal-cutting track saw a few months back. The cyclone was an equally challenging project because it contained so many curved parts. You can see him build it in the video below.

Comments on the video:
2:15 - Nice fit.
2:25 - Whoa, he made his own table saw too!
2:50 - I saw a guy take off the end of his thumb doing something like this. It would be better to clamp the work to the table.
3:45 - That’s a nice way to get the shape of a cylinder hitting a curve.
3:53 - More clever marking of the junction between two curves.
4:40 - Seeing him flush out the fit of these curved pieces makes me wish I had a spindle sander.
7:25 - It looks like he's positioning the opening in the outgoing port in such a way that the heavier dust has time to settle before the air leaves the vessel.
10:44 - Ok, we know the vacuum works.
11:25 - The cyclone works too; there’s dust in the tank but not in the bag.