• Advertise with us
Project by kiefer posted 07-05-2016 02:39 PM 3273 views 5 times favorited 38 comments Add to Favorites Watch

The other day I was cleaning the filter on my dust collector and wondered why a fair amount of dust was passing through the dust separator . I thought cutting a window in the separator would give me a insight of what actually happens with the dust and found that the dust was just swirling around in a horizontal direction and it took a fair bit of time for the dust to exit and go into the barrel below .
The next thought was how can I speed up this process and get more dust into the barrel instead of passing through into the filter . I cut three little pieces of thin sheet metal and bent them to shape of little fins ( like seen in the pictures ) and fastened them to the separator slot from the bottom ( barrel side ) .I staggered the fins around the slot starting about eight inches from the beginning and about eight inches from the end of the slot .
The result was quite interesting as the dust would take only about a third of the time to exit the separator and the stream of the dust changed to a downward flow toward the slot and into the barrel .
I am very please how this worked out with a rather crude modification and will run the collector for a while like it is to see how much dust passes through to the filter and how full I can let the barrel get and decide based on the result if further modifications can be made to better the result . Sorry about the rather poor pictures .

Picture #1 is from the intake port
Picture #2 is from the window looking in (too much glare )
Picture #3 is from the bottom of the separator ( barrel side )
Picture #4 is again from the bottom of the separator (barrel side )
Picture #5 a better view of the inside through window
Picture#6 just the fin and my buddy (see more pictures of shape in comment 20 below

-- Kiefer

38 comments so far

View  woodshaver Tony C   's profile

woodshaver Tony C

6206 posts in 3527 days

#1 posted 07-05-2016 02:54 PM

A thinking man never rests! And he always come up with a solution to the problem! And that’s why I love following you Klaus, we always learn something new!

-- St Augustine FL, Experience is the sum of our mistakes!

View a1Jim's profile (online now)


117274 posts in 3751 days

#2 posted 07-05-2016 02:59 PM

You’re always so creative Klaus ,good thinking.

-- wood crafting & woodworking classes

View johnstoneb's profile


3035 posts in 2347 days

#3 posted 07-05-2016 03:18 PM

That is a clever idea.

-- Bruce, Boise, ID

View HillbillyShooter's profile


5811 posts in 2466 days

#4 posted 07-05-2016 03:21 PM

ingenious! A great solution to a problem i’ve observed. I’m going to have to copy this—with your permission of course. Thanks for posting.

-- John C. -- "Firearms are second only to the Constitution in importance; they are the peoples' liberty's teeth." George Washington

View Bricofleur's profile


1457 posts in 3367 days

#5 posted 07-05-2016 03:25 PM

Good thinking, Professor Klaus ! Thanks for sharing your experiences.



-- Learn from yesterday, work today and enjoy success tomorrow. --

View shipwright's profile (online now)


8131 posts in 2972 days

#6 posted 07-05-2016 03:27 PM

Not an easy one to photograph!
It took me a bit to see what you have done but it looks like it makes sense and it seems to work. Those are always good indicators of being on the right track. I could use some similar fins on my not so similar separator in Green Valley. I’ll have a look at this again when I get back down there next fall.

-- Paul M ..............the early bird may get the worm but it’s the second mouse that gets the cheese!

View kiefer's profile


5620 posts in 2841 days

#7 posted 07-05-2016 03:39 PM

Thanks for taking a look Tony.
Never hurts to try an idea .

-- Kiefer

View kiefer's profile


5620 posts in 2841 days

#8 posted 07-05-2016 03:40 PM

Thanks Jim for stopping by and taking a look .

-- Kiefer

View kiefer's profile


5620 posts in 2841 days

#9 posted 07-05-2016 03:41 PM

Thanks Bruce
I will report after a bit of using how it is working out and with further modification I may make .

-- Kiefer

View kiefer's profile


5620 posts in 2841 days

#10 posted 07-05-2016 03:43 PM

Thanks John
It will be interesting what results and ideas you come up with .

-- Kiefer

View kiefer's profile


5620 posts in 2841 days

#11 posted 07-05-2016 03:44 PM

Thanks Serge
I just thought I share this with you guys as it seems to be a problem many of you have and there maybe better solutions to this .

-- Kiefer

View kiefer's profile


5620 posts in 2841 days

#12 posted 07-05-2016 03:47 PM

Thanks Paul
Yes it is a problem taking pictures and even a video of this because of the glare of the window and it being enclosed .

-- Kiefer

View Paul Stoops's profile

Paul Stoops

352 posts in 2735 days

#13 posted 07-05-2016 03:58 PM

A very interesting modification, Klaus! Do you think the improved air movement is due to the fins deflecting the air toward the outside of the enclosure so that it slows down significantly, allowing the debris to fall into the slot?

I wonder if this modification would allow better separation of the fines, such as are generated by a drum sander, which can be problematic for a Thien Baffle system?

-- Paul, Auburn, WA

View kiefer's profile


5620 posts in 2841 days

#14 posted 07-05-2016 04:35 PM

I think there are several directional changes happening by adding these fins and likely a slowdown of the airstream in some areas .
My thoughts where to direct their stream downward to the slot and outward but not close off the area between the fin and the outside wall .the space between the fin and the wall is likely speeding up the airflow in that area .
Observing what is happening with colour added to the airstream would be interesting but I am not equipped for that .
There are so many things happening and slight changes can make a noticeable difference so I will just experiment using gut feeling and observe .


-- Kiefer

View Jim Jakosh's profile

Jim Jakosh

21522 posts in 3279 days

#15 posted 07-05-2016 05:03 PM

Very good observation,Klaus and an ingenious way to solve it (without buying anything). Gut feeling is a good thing!!!

I have the same problem using a Dust Deputy- my vac and filter fill up even before the 33 gallon barrel does. I thought it might be because I have too big of a barrel ( as opposed to the 5 gallon bucket they recommend). I can see through mine and the dust does swirl a lot horizontally.I think I may be able to do that same thing because the top of the Dust Deputy, that was glued on, broke loose and I put in screws and braces to put it back on. Now I can take off the top and add some directional wings like you did.

Thank you so much for the observation and a a solution!!!!!!!!!!

This reminds me a modification I saw a guy named Hagi do in India to the cylinder head of a small engine. He cut about 8 grooves from the spark plug hole to the outer squish band where the diameter of the piston compresses the air down to nothing. This made the fire from the plug travel very quickly and evenly to the mixture resulting is a quieter and more efficient running engine. I tried it on a small engine and it worked quite well. I hope this modification to the Dust Deputy does as well!!

Cheers, Jim

Cheers, Jim

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

showing 1 through 15 of 38 comments

Have your say...

You must be signed in to post the comments.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics