Metal Trash Cans & Thien Baffles

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Forum topic by schain posted 03-11-2018 02:34 PM 808 views 0 times favorited 4 replies Add to Favorites Watch
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1 post in 858 days

03-11-2018 02:34 PM

Topic tags/keywords: thien baffle trash can dc dust collector question

I have a Grizzly GO710 (1 hp.) DC and am thinking of building a thien baffle mounted on a 30 gallon metal trash can. I have been using a 5 gallon plastic bucket (Home Depot style) and my 10 gallon shop vac. with a Dust Deputy and have at times had problems with the suction collapsing the bucket. Has anyone who is using a metal trash can had similar problems? Any suggestions in for this project are welcome.

4 replies so far

View ArtMann's profile


1480 posts in 1594 days

#1 posted 03-11-2018 03:03 PM

It seems to me that the bucket collapsing is an indication that the hose is too constricted. Before going to far with some other configuration, I would take a good look at that. Maybe that particular bucket is just weak. There are lots of people who use this same configuration without having any trouble.

View Walker's profile


385 posts in 1250 days

#2 posted 03-11-2018 06:51 PM

I built a Thien Baffle attached to my shop vac. I used the “Behrens 31 Gal. Galvanized Steel Round Trash Can” from HD, and it implodes on itself quite easily. It might as well be made from aluminium foil. I reinforced it a bit with plywood on the inside but it’s still pretty bad.

When I get around to rebuilding it, I’m going to try one of the Brute heavy duty plastic trash cans, or perhaps an industrial plastic drum. They seem to be readily available on craigslist for $10.

-- ~Walker

View Holbs's profile


2346 posts in 2808 days

#3 posted 03-11-2018 07:00 PM

save your funds in regards to metal trash cans and buy 30 gallon or even 55 gallon hard plastic cans. Should easily find locally for free or $5 on craigslist.

-- The Carpenter Bee is derived from the Ancient Greek word wood-cutter "xylokopos/ξυλοκὀπος"

View OSU55's profile


2648 posts in 2768 days

#4 posted 03-11-2018 07:02 PM

I use a galvanized steel 30 or so gal can from Lowes, bought it 5 or so yrs ago to use with a thien baffle and connected to a 2hp HF DC. No issues with collapsing. Doesnt even “drum” from full to blocked suction. A shop vac will pull significantly more vacuum than a dc will. I suspect you are clogging the tool to bucket air path causing hi vac which collapses the bucket.

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