Yep! Seems like everybody in Rochester worked for either Kodak or Xerox. Started at Xerox in 74 as a service rep, then went on my own in 85 - to present. I saved a couple of blowers for the same purpose, but found the HF blowers move a much higher volume, and are cheap enough. So the blower and separator will sit on the shelf for another project someday....
You are absolutely correct. All woodworking produces fine dust, regardless of whether it is jointing, planing (with a power planer), or turning. From the moment I started turning about 2 years ago, I set up dust collection via my cyclone with a hood at the lathe. Very little dust escapes in to the shop air and, in fact, small shavings get sucked up many times also. I wouldn't be without the hood on my lathe, regardless of how much it cost
If you put a 6" on a 4" line the 4" becomes the limiting factor. It is the choke point. In an ideal world you would have a more powerful DC (3hp or more) and run a 6" to the bandsaw and split it into 3 pipes 4" in diameter. One to the cabinet around the lower wheel. a second bell mouth under the table by the guards and the third with a bell mouth above and behind the blade. In your case I would just put the one bell mouth to the underside of the table. Get a bigger impeller as soon as you can afford it.
With 3/4hp you won't get nearly triple the airflow because the DC just can't pull that much but it will pull more than a 4" which is always better.
You've described my setup - 6" from a 5hp cyclone split to three 4" at the bandsaw. I get no sawdust inside the cabinet.
My bandsaw has two collection ports built into the lower cabinet, one just below the lower guides. To catch the dust that sprays onto the floor from the lower guides I built a little shroud from plexiglas, held around the guides with magnets. As described earlier, the flex tube is is positioned or parked as needed, held in place with a strong magnet.
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Absolutely worth the effort.
JKJ
I recently built a portable style dust collection pickup for general use in the shop and used it yesterday to pickup dust from sanding on my lathe.
The base is a large brake drum. It uses a 4" DWV pipe on top which connects to my DC with flex hose. I can lengthen the pipe with a couple and short lengths of the DWV. On the end, I have a bell mouth hood. The hood seems to catch dust better than just the end of the pipe. I purchased the Bell Mouth Hood from Parts-Express which sells audio and electronics. It is made for speaker ports but works well for dust collections.
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Sweet gents, lts of great ideas. I bought the laguna 18bx earlier this year and I will try what is set up from the factory and go from there. The dust collector is a 1-1/2 grizzly G0860 new design due in at the end of December but we will see. I'l do a little review on it when it get it going. The DC has a 6 inch port with a removable Y for two four inch. What i am thinking is find a 6 inch with a 4 Y-ed in to run to the bandsaw more or ess fixed, put a blast gate to close it when not needed the run a 6 inch to the lathe with a bell mouth. Then move it to the drill press when doing some heavier drilling. It will be on a free standing stand something like larry so I can move it around as needed. Drill press and lathe in two positions.
Thanks for the help fellas
Dean
Dean, here is still another hood. It simply sticks in between the ways and hangs on the wall when not in use. I went 6" to a gate and wye and can use just the top inlet, just the hood, or both. I have a variety of pipes that friction fit into the top inlet.