Pre Dust Collector Dust Collector

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Project by SPalm posted 03-13-2010 05:49 PM 6724 views 31 times favorited 16 comments Add to Favorites Watch

My Brain said that I needed this. Actually it will help a lot with carting sawdust up the stairs. Emptying that plastic bag was always really messy, and I would allow it to get way too full. Now I parked a 20 gal trash can in the empty space of my Delta DC, and its job is to gather most all the incoming debris. It does a fine job of this, and the can pops right out for emptying.

I built a design based on the baffle work by Thein. The air comes in, gets pushed to the side, so it swirls around. The dust is in this air. The dust finds the slit around the baffle board and falls through to the bottom of the can. The air continues swirling and exits through the center pipe.

I did not find any real plans or instructions, so I winged it. The multiple circles were cut on a the bandsaw with a crude circle cutting jig. The Delta DC has a 5 inch inlet so this presented a purchasing problem. LJ Lenny came to the rescue and supplied me with the foot of the flex hose that I needed. (Thanks, Lenny.) Now I needed a coupler on the collector side for the 5 inch hose. What I did was to cut a small disk and then place a 4 inch (5.25 inch O.D.) PVC coupler on it. Again I used the circle cutter to trim it down to size. I have this piece on the top, and its male counterpart on the inside of the assembly.

The rest of the build was pretty straight forward, with a lot of measure twice thingies. The baffle is held with dowels. The completed unit seems to tuck in quite comfortably and works a charm.


-- -- I'm no rocket surgeon

16 comments so far

View PurpLev's profile


8652 posts in 4939 days

#1 posted 03-13-2010 06:24 PM

definitely on the ‘to-do’ list. already have the trash can. now if I can only find the time to get in the shop – that would be great!

Thanks for the reminder- this one looks great!

-- ㊍ When in doubt - There is no doubt - Go the safer route.

View Abbott's profile


2570 posts in 4594 days

#2 posted 03-13-2010 06:35 PM

I also built a Thein Separator and it works very well.

-- Ohh mann...pancakes and boobies...I'll bet that's what Heaven is like! ♣ ♣ ♣ ♣

View blackcherry's profile


3349 posts in 5114 days

#3 posted 03-13-2010 07:04 PM

Welcome to the Thein Club Steve, it a wonderful addition to a very annoying problem. Nice build as always…BC

View NBeener's profile


4816 posts in 4465 days

#4 posted 03-13-2010 07:05 PM

Just gotta’ agree with 3fingerpat: great project, really well presented!

-- -- Neil

View Karson's profile (online now)


35279 posts in 5691 days

#5 posted 03-13-2010 07:36 PM

Steve: a great build. I bought a cyclone on ebay that sits on top of the metal lid for my trash can and it comes out of there to my grizzly DC that I put a paper cartridge on top of and a clear plastic bag on the bottom. So I can see what goes in the bag.

Usually the only stuff that goes into the bag is when I forget to empty the can and it goes to the DC.

The can is an easier carry to the pile.

-- I've been blessed with a father who liked to tinker in wood, and a wife who lets me tinker in wood. Appomattox Virginia [email protected]

View ripcross's profile


1 post in 4287 days

#6 posted 03-13-2010 07:42 PM


My dust collector is much like yours. I have no need to seperate the dust though. I would like to increase it’s vacuum power. Does adding one of those whirlpool/tornado cannisters increase vacuum suction?


View John Gray's profile

John Gray

2370 posts in 5176 days

#7 posted 03-13-2010 08:16 PM

Excellent job Steve!!!!!!!
It is very similar to the one I built and Lenny supplied my top hose too. :-)

-- Only the Shadow knows....................

View IowaWoodcrafter's profile


280 posts in 5367 days

#8 posted 03-13-2010 08:17 PM

Oh man, I’ve got to make one of those! I HATE emptying the bag on my DC!

-- Owen Johnson - aka IowaWoodcrafter

View CharlieM1958's profile


16292 posts in 5509 days

#9 posted 03-13-2010 08:18 PM

Nice bit of “plumbing” work, Steve!

-- Charlie M. "Woodworking - patience = firewood"

View patron's profile


13722 posts in 4632 days

#10 posted 03-13-2010 08:34 PM

steve ,
this looks like a nice unit ,
congrats on the build .
i finally don’t have to do this ,
my vacuum is going straight out side !

no more hauling dust .

-- david - only thru kindness can this world be whole . If we don't succeed we run the risk of failure. Dan Quayle

View SPalm's profile


5338 posts in 5173 days

#11 posted 03-13-2010 08:43 PM

Thanks everyone.

Ripcross: I have found with my limited use of this cyclone that I loose some power. That 1.5 hp DC does have some good air movement, but not an incredible amount. In the past I only used one hose and would move that around from machine to machine for maximal impact. This may also be because I am too lazy to plumb the shop.

One thing that I noticed was that I wave the flex hose over the floor at the end of a project to suck up chips. I would usually suck up the rubber mats while do this. Well, with the cyclone attached, the mats don’t come flying off the floor like they use to. So I guess there is a reduction in static pressure. I am not sure about CFM. Maybe they are linked. Still a lot of air movement though.


-- -- I'm no rocket surgeon

View Lenny's profile


1723 posts in 4818 days

#12 posted 03-13-2010 09:17 PM

Hey Steve, I see that you “got ‘r done”. Nice build. I am particularly impressed with your ingenuity in shaving down that PVC coupler. What a great idea to cut the wooden disk and then use the BS to trim it down via the circle cutting jig. As they woud say in a Guinness beer add: “Brilliant!”

-- On the eighth day God was back in His woodworking shop! Lenny, East Providence, RI

View Lee A. Jesberger's profile

Lee A. Jesberger

6875 posts in 5270 days

#13 posted 03-13-2010 10:30 PM

This looks good Steve.


-- by Lee A. Jesberger

View degoose's profile


7285 posts in 4645 days

#14 posted 03-13-2010 10:49 PM

Now everyone will want one… oh I already have one… oh well .. will have to look for something else to do.
I say … anything to make life in the shop easier has got to be good.

-- Be safe.

View Splinterman's profile


23074 posts in 4652 days

#15 posted 03-14-2010 01:09 AM

Hey Steve,
Cool job and it works…well done.

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