Thien Style cyclone baffle

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Project by bluekingfisher posted 10-11-2012 07:17 PM 4688 views 19 times favorited 22 comments Add to Favorites Watch

I spent a couple of weekends building this baffle for my dust collection system.

Made from MDF, threaded 10mm stud, 115mm sewerage pipe and 150mm air vent duct for the output hose side. I will hook this up to the 150mm port on the DC rather than use one of the two 100m ports on the plastic spiggot

the Black sewerage pie is 115mm or 4 1/2 ” so I had to make an adaptor to fit the 4” hose. I did this by cutting a 4” section off the end of the black pipe and cut a vertical slice on one sideapprox 3mm wide on the bandsaw. You can see the seam in one of the photographs. When you squeeze it back together it fits snuggly inside the 4 1/2” pipe. It held the seam joint and welded it in place using plumbers plastic pipe weld cement, works great.

It is to fit a 200 litre drum so I hope it works ok when I go to set it all up.

Thanks for looking.


-- No one plans to fail, they just, just fail to plan

22 comments so far

View Don W's profile

Don W

15517 posts in 1312 days

#1 posted 10-11-2012 07:25 PM

it looks great. It should work like a charm.

-- Master hand plane hoarder. -

View mloy365's profile


435 posts in 1874 days

#2 posted 10-11-2012 07:40 PM

Impressive! I’ll bet it will work great.

-- Mike - Northern Upper Michigan

View Jim Rowe's profile

Jim Rowe

611 posts in 1057 days

#3 posted 10-11-2012 09:41 PM

Looks like a neat solution. Interesting drilling set up in picture 5.

-- It always looks better when it's finished!

View TopamaxSurvivor's profile


15061 posts in 2420 days

#4 posted 10-12-2012 03:23 AM

Looks like a work of art! Sure you want to get it dusty?

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

View bluekingfisher's profile


1101 posts in 1724 days

#5 posted 10-12-2012 07:13 AM

Thanks for the input fellahs, I tend to overdo things a little but I’d rather do it right first off rather than have to go back and fix it up sometime later…......I hate that.

-- No one plans to fail, they just, just fail to plan

View exelectrician's profile


1741 posts in 1172 days

#6 posted 10-12-2012 08:03 AM

You will be happy with that D.C. and your lungs will thank you later on.

-- Love thy neighbour as thyself

View bluekingfisher's profile


1101 posts in 1724 days

#7 posted 10-12-2012 08:29 AM

I sure hope so exelectrician, I’ve been breathing in too much dust for too long.

-- No one plans to fail, they just, just fail to plan

View kizerpea's profile


746 posts in 1112 days

#8 posted 10-12-2012 10:43 AM

Looks good it works good too…


View Vrtigo1's profile


432 posts in 1736 days

#9 posted 10-12-2012 01:16 PM

Where did you buy the sewer pipe?

View Bogeyguy's profile


494 posts in 812 days

#10 posted 10-12-2012 03:05 PM

Will the outlet require a filter???

-- Art, Pittsburgh.

View blackcherry's profile


3199 posts in 2567 days

#11 posted 10-12-2012 03:31 PM

Welcome to the world of Thein, I’ve had mine now over a year and it just works amazing. It works so well that the trash can started to collapse in the center so I cut out a wooden ring and sealed it to side of the trash can and now it as quite as a church mouse….enjoy the clean surrounding, nice work on your lid….BC

View Rick  Dennington's profile

Rick Dennington

3592 posts in 1939 days

#12 posted 10-12-2012 03:37 PM

I’ve been meaning to write you, and I owe you a long letter, which I will get to hopefully, soon….We have some catching up to do….I just kind of jump in and out on here when possible…..I’ve been after them elusive fish all spring and summer, and not through yet… Once again, you done good on the d.c. baffle..
If you’ll build me one, and ship it over here, I’ll test it out on mine… See ya….

Great project you built….you said you were gonna do it, and you did….Hope it works like you plan for it to.

-- " I started with nothing, and I've still got most of it left".......

View NormG's profile


4507 posts in 1748 days

#13 posted 10-12-2012 04:39 PM

Looks well made, I’ve yet to make one. Maybe my work area will look as clean as yours if I did

-- Norman

View TechRedneck's profile


746 posts in 1601 days

#14 posted 10-12-2012 11:12 PM


Glad to see you have fimally finished it. Give us an update after it is all hooked up.

-- Mike.... West Virginia. "Man is a tool using animal. Without tools he is nothing, with tools he is all.". T Carlyle

View ajosephg's profile


1860 posts in 2305 days

#15 posted 10-12-2012 11:33 PM

Great workmanship. I didn’t recheck the Thien drawings, but the clocking of your intake pipe doesn’t look quite right. If it doesn’t work properly, that may be the reason.

-- Joe

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