Dust collector

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Forum topic by CarlBert posted 04-16-2010 11:03 PM 4017 views 2 times favorited 3 replies Add to Favorites Watch
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25 posts in 2991 days

04-16-2010 11:03 PM

Topic tags/keywords: question

Ok I need to buy a dust collector. I have an “L” shaped shop. One leg is about 21’ and the other 24’. I want to duct it to about 7 different tools. 4” duct to all except 2, which are 2 1/2”. I am trying to place the unit outside the shop. Problem is I have a height issue. I only have 70” in total. That has to include the enclosure roof. I found a General cannister dust collector which is 57” high, but only 1 HP and 650 CFM. Is that big enough to handle the whole shop? If not what size, brand and type would you suggest? I noticed they vary in price quite a bit, but all seem to be built exactly the same. I don’t mind spending the money as long as I am getting something for it in return. Any advice would be appreciated.

-- Carl, New York

3 replies so far

View CL810's profile


3798 posts in 3013 days

#1 posted 04-16-2010 11:59 PM

I don’t believe a 1.5 HP DC unit will handle your shop. Your height limitation may not be a problem if you can combine your unit with a cyclone and then exhaust directly to the outside.

Check this mod by Cory. I used Cory’s idea (Thanks!) with an Oneida cyclone and a Harbor Freight 2 HP DC, and I am well below 70” for just the cyclone and blower. The cyclone will trap 98% of the sawdust letting you exhaust to the outside.

-- "The only limits to our realization of tomorrow will be our doubts of today." - FDR

View Dave Owen's profile

Dave Owen

254 posts in 3099 days

#2 posted 04-17-2010 12:10 AM

I very much like the Oneida 2 HP cyclone collector I put in when I built my shop in 2003. I used 4” PVC ducts throughout and the system handles everything well – except for my Jet Super Saw (I have to believe the saw is not well designed from the dust collection standpoint). I couldn’t ask for it to work better on all the other tools – 6” Delta jointer, 12” Dewalt planer, 10/20 drum sander, Rigid oscillating sander, bandsaw, etc. (not all at once, of course – but it will handle any two other than the saw). I’ve never had a blocked duct My shop is smaller than yours, though, and my longest run is about 24’ (collector to machine port). Except for the saw, it’s hard to imagine larger duct would work any better – but from what I read, you might want to consider that. The height limitation may give you some problem, but if you can get a design to work outside, it will be much better from the noise standpoint (except for the neighbors, of course). If it does go outside, you may want to come up with a good inside indicator that will tell when the container is full. Even though mine is inside, I made a wooden manifold with a Plexiglas window that helps in that regard. Good luck with it.

-- Dave O.

View ND2ELK's profile


13495 posts in 3799 days

#3 posted 04-17-2010 12:25 AM

If you can keep your cyclone outside so you can get more height for it, you can bring your duct work in at 70”. Your main runs need to be at least 6” and your drops 4” and reduced to 2 1/2” where needed. You need blast gates at each drop and only open the one or two you are using at the time. Look at my workshop and blog “Dust Collection In” It will show you what I am talking about. I bought my cyclone and duct work from Penn State Industries and it works great. They have tech help if you need it. I figured out what I needed for my shop as I have done quit a few of these installs when setting up new shops for prison industries over the past 30 years. Good luck. I will be glad to help you in any way I can if you decide to go this way. A lot depends on how much you want to spend. I have $2000 in my dust collection system but would not be with out it.

God Bless

-- Mc Bridge Cabinets, Iowa

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