dual harbor freight with cyclone
Over the past couple of years, I've been accumulating dust collection "solutions," including a cyclone unit (built by someone else using the Wood Magazine plans) and a spare Harbor Freight 2 hp dust collector (I was sure the one I was already using wasn't going to last long - it's been over four years now). When I built my new shop last year, I installed six inch duct work from Home Depot from each tool to the cyclone. Then, since I now had two of the Harbor Freight units, I put a tee on the outflow side of the cyclone and installed both dust collectors. Finally I added Wynn Environmental cartridge filters to both units and new blast gates to every tool. Works good for my 6-inch jointer, OK for my planer and router table, barely for my bandsaw and miter saw, and hardly at all for my table saw. As Bill Pentz predicted, a lot of chips make it past the cyclone and into the dust collectors. But I still only have to empty the bags once for every 8 or 10 times I empty the trash can under the cyclone. So it saves a lot of work and money for new bags.