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Thien baffle question

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Forum topic by Tom posted 02-18-2017 04:00 AM 366 views 0 times favorited 1 reply Add to Favorites Watch
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Tom

166 posts in 895 days


02-18-2017 04:00 AM

HF has their dust collector on sale for $180 and I have a 20% off coupon to go with it. I want to build a Thien baffle to go on top of my dust barrel…but I’m not sure how tall to make the baffle. I think the outlet on the top will be 5” but the inlet on the baffle 4”. Would I make the walls 8” or 10”? I have a piece of 1’ x 7’ lexan so it’s tall enough and long enough to fit.

That’s the one part of the “plans” I’ve found that isn’t really clear. I’m sure a lot of people here have built one and can help me get it right on the first build.


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WoodES

85 posts in 1525 days


#1 posted 02-18-2017 06:49 AM

Based on the previous threads on this topic and my own experience, there are a lot of answers that work. I believe mine is 8” tall with a 6” inlet & outlet ducting. However, there are those that are much taller than that.

The key is that the area within the baffle is larger than the inlet/outlet ducts to create a pressure drop in the baffle. This allows the heavier (chips & dust) to fall out of the air stream into the slot on the outer perimeter.

Search LJ there are a lot of threads and even more opinions. So far, I haven’t heard of any failures so your chances of success are good.

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