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Downdraft Table

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Project by owennbw posted 03-06-2013 06:06 PM 4137 views 12 times favorited 10 comments Add to Favorites Watch

I wanted a way to sand my kitchen cabinets doors inside in the basement instead of doing in a cold garage. This should help control the dust.

I left hose port somewhat temporary as I plan to retrofit it to a “real” dust collector when I get one. For now, this will have to do.

Nathan





10 comments so far

View helluvawreck's profile

helluvawreck

23157 posts in 2329 days


#1 posted 03-06-2013 06:08 PM

This will surely help your lungs out. Good work.

helluvawreck aka Charles
http://woodworkingexpo.wordpress.com

-- If a man does not keep pace with his companions, perhaps it is because he hears a different drummer. Let him step to the music which he hears, however measured or far away. Henry David Thoreau

View ldl's profile

ldl

1135 posts in 1828 days


#2 posted 03-06-2013 06:34 PM

Looks good. It should draw good from the center. As Charles says your lungs will appreciate it.

-- Dewayne in Bainbridge, Ga. - - No one can make you mad. Only you decide when you get mad - -

View DIYaholic's profile

DIYaholic

19178 posts in 2138 days


#3 posted 03-06-2013 07:16 PM

Nicely done!
As already dtated, your lungs will thank you!
Plus your shop “sanitation & dust mitigator” will thank you too!!!

This is on my veeeeeeery looooooong shop “To-Do List”!!!

-- 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 NGK's profile

NGK

93 posts in 1374 days


#4 posted 03-07-2013 02:36 AM

When sanding small items, block off some of the pegboard on the left, right, and rear with appropriately sized pieces of scrapwood. This helps increase the down-draft near the edges of the sanded item. Remember, too, that many sanders have their own little dust collection bag or device.

Your dust collection tube/pipe/funnel need not necessarily be centered. With a side-exit of air, the fine dust can settle on the “bottom board” and be less apt to plug your Shop-Vac filter as often. But then, of course, it should be constructed so as to be able to remove the pegboard and clean up the “fines” that fell straight down.

View whitebeast88's profile

whitebeast88

4092 posts in 1653 days


#5 posted 03-07-2013 02:45 AM

great sanding box.
i built mine awhile back and its nice when sanding small stuff comes in handy.

-- Marty.Athens,AL

View wrightly's profile

wrightly

59 posts in 1374 days


#6 posted 03-07-2013 03:06 AM

i’ve been wanting to make something like that. if my lungs ever fell out, it would probably be the equivalent of a shop vac filter

-- WRIGHTLY (Bristol, TN)

View GregPete's profile

GregPete

1 post in 1369 days


#7 posted 03-07-2013 05:28 PM

Do you really need the inclined bottom? If you are connected to a vac or DC the lightweight particles should stay entrained in the airflow before they stack up on the bottom of the table.

View owennbw's profile

owennbw

15 posts in 1408 days


#8 posted 03-07-2013 06:30 PM

Thanks for the kind comments guys.

GregPete – My initial testing shows that the air does not really move the dust so much as helps it to fall towards the table top. My vac is sub 200 CFM so I assume there is not enough airflow to do anything other than assist a directional fall towards the top, which is what I was aiming for.

A higher flow rate would help to keep the dust moving, but the farther away from the point of suction, the less effective it will be. The inclined bottom will help with that and reduce areas of dust accumulation.

I haven’t had time to really break it in yet, so it remains to be seen how well it will do with my vac. An “actual” dust collector should work pretty well with it, I would think. I will let you know when I get one put together, someday, in the future, at some point…

Nathan

View NGK's profile

NGK

93 posts in 1374 days


#9 posted 03-07-2013 07:22 PM

Agreeing with the above two posts. I doubt the angled bottom does much good and would be a pain to design, make, and assemble. Yes, with minimal air flow, most of the dust is merely helped straight down through one of the peg holes. Actually you don’t want it to be carried with the air to the Shop-Vac, as that would mostly just plug up your filter.

View Nighthawk's profile

Nighthawk

548 posts in 1820 days


#10 posted 03-07-2013 11:16 PM

I need one of the these… I must add it to my list…

-- Rome wasn't built in a day... but I wasn't on that job? ... http://www.wackywoodworks.co.nz

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