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Thien Top Hat build

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Project by revwarguy posted 07-14-2013 02:06 AM 3220 views 17 times favorited 16 comments Add to Favorites Watch

I made a Thien style top hat dust separator for my table saw and other gear. Seems to work very well.

Build log of it at www.liming.org/dustcollection

for a description of it was well as other things I’ve done about dust collection over time.

Thanks for looking.

-- "72.6 per cent of all statistics are made up on the spot." - Steven Wright





16 comments so far

View TopamaxSurvivor's profile

TopamaxSurvivor

15071 posts in 2423 days


#1 posted 07-14-2013 02:23 AM

Looks good from here!

-- "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

View Jim Jakosh's profile

Jim Jakosh

12333 posts in 1852 days


#2 posted 07-14-2013 02:40 AM

Nice job on it. It is good that you used a metal trash can. I put a dust deputy on a big plastic can it sucked the sides in!!

-- Jim Jakosh.....Practical Wood Products...........Learn something new every day!! Variety is the Spice of Life!!

View Matt Przybylski's profile

Matt Przybylski

468 posts in 1125 days


#3 posted 07-14-2013 02:01 PM

Very nice build and great blog. I have one of these and it works great but am going to rebuild it with lexan to see inside. I once was not paying attention and the can filled all the way and chips were moving through and into my bag. I added the window in the can as well as a safety precaution but I want the lexan top hat too. This is exactly the way I was going to do it so its good to see that it worked out well for you. Only difference is I’m going to use 1/16” lexan as its a lot cheaper and readily available. Thanks for the detailed blog.

-- Matt, Illinois, http://www.reintroducing.com

View lcwood's profile

lcwood

68 posts in 1511 days


#4 posted 07-14-2013 02:25 PM

nice work !

I just like to see one image with the dimensions you used in that blog you have about it

View revwarguy's profile

revwarguy

125 posts in 648 days


#5 posted 07-14-2013 03:26 PM

I just like to see one image with the dimensions you used in that blog you have about it

You always start with the diameter of the can or bin, and with the diameter of the connection hoses. These dimensions depend on what you have or will use.

I used a 30 gal can with an upper diameter of 20 inches. I cut an mdf circle of 22 1/2 inches with a pocket in it to fit the lid (like 1/2 inch wide by 1/2 inch deep) but again, this depends on what kind of rim there is on your can to get a good fit. From there, the drop slot is usually 1 1/8 inch wide, and this sets the diameter of the top. The height is a function of the hose size – I used 4 inch hose, but if you are going to use 5 or 6 inch hose you would make it higher accordingly.

I think everything else is covered on the webpage.

-- "72.6 per cent of all statistics are made up on the spot." - Steven Wright

View DIYaholic's profile

DIYaholic

14558 posts in 1422 days


#6 posted 07-14-2013 03:56 PM

Looks great!!!
I built a very similar unit….

I didn’t have any lexan for the seperation chamber wall so I used what was on hand, a 1/16” aluminum sign (painted white). I still need to add a lexan “Dust Containment Bin Aperture”. Yeah, that is a very technical term for a “Full-Not Full” viewing window!!!

-- Randy-- I may not be good...but I am slow! If good things come to those who wait.... Why is procrastination a bad thing?

View revwarguy's profile

revwarguy

125 posts in 648 days


#7 posted 07-14-2013 06:46 PM

Nice job, Randy. I like the way you used the ventilation grate-to-duct transition. I’ve done some jobs that provided me with quite a bit of scrap Lexan. Great stuff to work with.

I am thinking of an arm to lift the separator off the can. How do you do that on yours?

-- "72.6 per cent of all statistics are made up on the spot." - Steven Wright

View DIYaholic's profile

DIYaholic

14558 posts in 1422 days


#8 posted 07-14-2013 09:41 PM

Thanks for the kind words. I’m just glad cell phone images don’t accurately show the imperfections!!! Lol. I used the regtangular ducting, after reading a few discussions on the Thein build site. There were reports of improved performance with such a setup. I can’t verify or refute those claims, as I have no baseline to compare to. It also made assembly a little easier.

I haven’t worked on the “Top Hat Lift mechanism” yet. I will hinge the top, in the back, to the wall and lift from the front. A chain, strapping or rope will support it in the raised position. Well, that’s the plan at least!!!

-- Randy-- I may not be good...but I am slow! If good things come to those who wait.... Why is procrastination a bad thing?

View tool_junkie's profile

tool_junkie

244 posts in 1276 days


#9 posted 07-16-2013 04:05 AM

Nice build revwarguy!

I have one on my list for a long time. Lets see when I get to it.

How did you seal the lexan with the MDF, silicone sealant?

View revwarguy's profile

revwarguy

125 posts in 648 days


#10 posted 07-17-2013 01:35 PM

I used clear Polyseamseal by Loctite (Lowe’s, I think) all around the outside where the frame meets the Lexan, as well as around the Lexan and the metal can for the inspection window. Seems to stick well to all surfaces, but is a little stronger than silicone.

-- "72.6 per cent of all statistics are made up on the spot." - Steven Wright

View recover82's profile

recover82

4 posts in 597 days


#11 posted 08-21-2013 02:25 AM

Just curious where you are buying your Lexan? It’s kind of irritating needing such an odd shape. I need something like 6”x60”... that’s one long rectangle.

And by the way, revwarguy, my build is (so far) based on yours. Thanks for the excellent write up and all of the pictures.

View revwarguy's profile

revwarguy

125 posts in 648 days


#12 posted 08-21-2013 12:13 PM

The Lexan I used was left over from another CNC job I did, but I originally got it from a local plastics distributor. If you don’t have one near you, make friends with a local sign company who can get anything. BTW, I didn’t use a 60 inch piece – I used two pieces cut so that the seam fell behind one of the upright supports held together with shipping tape and then sealed. Like wise, you also make it 3 20” pieces as well. I think they carry some Lexan at Lowe’s, but make sure its Lexan (polycarbonate) not Plexiglass (acrylic). Lowe’s also charges more for it as well. If that doesn’t work, there is always McMaster-Carr, like this.

-- "72.6 per cent of all statistics are made up on the spot." - Steven Wright

View recover82's profile

recover82

4 posts in 597 days


#13 posted 08-21-2013 08:09 PM

Thanks for the info! I had previously ordered a random sheet of plexi from some place out of Tennessee many years ago but couldn’t track them down. I guess I could check with some local glass shops as well.

My hope was to avoid having to join multiple pieces to cut down on any potential drag that may introduce, minimal as it may be.

View revwarguy's profile

revwarguy

125 posts in 648 days


#14 posted 10-14-2013 08:22 PM

I just added a video of dust being processed in the separation chamber – it is at the bottom of the page on the website above, www.liming.org/dustcollection

-- "72.6 per cent of all statistics are made up on the spot." - Steven Wright

View DIYaholic's profile

DIYaholic

14558 posts in 1422 days


#15 posted 10-14-2013 09:39 PM

revwarguy,
The link to your blog seems to busticated!!!

-- Randy-- I may not be good...but I am slow! If good things come to those who wait.... Why is procrastination a bad thing?

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