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Downdraft table

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Project by JoeC61 posted 04-09-2009 11:54 AM 9117 views 12 times favorited 13 comments Add to Favorites Watch

This is a downdraft table I built using an old furnace motor/blower. Eventually, the side of the box where the motor is located is airtight from the other half. I drilled 640 1/4” holes on the downdraft side of the top surface. The sides of the box are made from 1/2” MDF, the top is particle board with melamine. Drilling 640 holes tested the ability of my DeWalt to recharge… It took a while to figure out how to drill the holes without chipping around the edges. The air is sucked through 2 filters, a cheap $1 pre-filter and then a more expensive HEPA filter. (both 20×25 and accessible behind the vertical strip on the front of cabinet) The temporary netting was installed to keep my dog from beheading herself on the blower blades. The downdraft doesn’t seem to be as strong as I thought it would be, but when I sand small projects it does remove the dust. So far, so good. The table top is 4’x5.5’. Wind blowing out the bottom isn’t a problem, probably because I keep my floor clean. If it was full of dust it would be another problem.

-- Joe-Carver, MN





13 comments so far

View Waldschrat's profile

Waldschrat

505 posts in 2089 days


#1 posted 04-09-2009 12:19 PM

Hey cool, perhaps on the bottom you could mount some sort of leaf blower bag or something inside to collect the dust! I like this idea… Is always cool when a guy can reuse old parts off something else to build something usefull again.

Thanks for posting!

-- Nicholas, Cabinet/Furniture Maker, Blue Hill, Maine

View cabinetmaster's profile

cabinetmaster

10874 posts in 2212 days


#2 posted 04-09-2009 12:33 PM

I love the name you put on it…............LOL

Great looking sucker. But why did you not use a pegboard on it instead of drilling all those holes?????

-- Jerry--A man can never have enough tools or clamps

View Tim Pursell's profile

Tim Pursell

494 posts in 2436 days


#3 posted 04-09-2009 01:18 PM

I built a simmilar table a few years ago & was also disapointed with the airflow. I ended up hoging out the holes to 1/2”. I also use a open waffle design non slip pad on top. I found the workpiece just started to rotate with the ROS—-not to great a way to get the sanding done as easily as possible!

-- http://www.etsy.com/shop/tpursell?ref=si_shop

View Scott Bryan's profile

Scott Bryan

27251 posts in 2475 days


#4 posted 04-09-2009 01:27 PM

Joe, that is a nice addition to your shop. I have been considering building one of these since sanding dust is one of the problems I have to deal with in my shop. This post has certainly given me some ideas.

Thanks for the post.

-- Challenges are what make life interesting; overcoming them is what makes life meaningful- Joshua Marine

View jockmike2's profile

jockmike2

10635 posts in 2900 days


#5 posted 04-09-2009 02:39 PM

I have the same thing but mine hangs from the ceiling and sucks air from 2 sides and blows out the front. I also use 2 filters on both sides, just cheapy though. change them weekly. Works excellent.

-- (You just have to please the man in the Mirror) Mike from Michigan -

View hairy's profile

hairy

2021 posts in 2186 days


#6 posted 04-09-2009 06:39 PM

Nice work! I hope it really sucks.

-- the last of Barret's Privateers...

View jack1's profile

jack1

1924 posts in 2681 days


#7 posted 04-09-2009 06:39 PM

Nice project. I bought the table from Delta that does the same thing but with a dust collector or large shop vac. I don’t use it much because I have to take it out and set it up. Your project looks like it can be used for assembly and other tasks so it stays out all the time. Neat.

-- jack -- ...measure once, curse twice!

View LesB's profile

LesB

1066 posts in 2097 days


#8 posted 04-09-2009 07:11 PM

I use a similar design for cleaning the air in the shop and also circulating the heat from my wood stove at the same time. Mine blows out the high side towards the wood stove. (Yes for those who will warn me, I’m aware of the very slim chance of a fire hazard with a wood stove in the shop.) Your idea stimulates the old brain. I wonder if I could have it dual purpose and just close off the air filter on the side with a plastic sheet when I’m sanding something on the top. I will have to work on that. As it is now I use the top to hold my bench grinder and Work Sharp sharpener.

-- Les B, Oregon

View prez's profile

prez

347 posts in 2065 days


#9 posted 04-10-2009 03:59 AM

A real “sucker-upper”! I’m thinking I might be able to do something like that but on a smaller scale. I’ve got an old bathroom fan hanging around. Should work for smaller projects when I’m not making so much sawdust! Gotta love these guys who think “outside the box!” or in this case….inside.

-- George..." I love the smell of a workshop in the morning!"

View steiner's profile

steiner

277 posts in 2004 days


#10 posted 04-10-2009 05:17 AM

SUCK-O-MATIC XL

Love the name!

-- Scott - Katy, Texas

View JoeC61's profile

JoeC61

34 posts in 2236 days


#11 posted 04-13-2009 02:38 AM

Not sure why the heck I didn’t use peg board for the holes. I guess I was thinking I wanted something more stout. Typical, always over-building things. I could have used peg board and reinforced it from underneath. Besides having the downdraft table, I was really interested in having a large multi-purpose workbench.

-- Joe-Carver, MN

View Jerry's profile

Jerry

212 posts in 2192 days


#12 posted 04-26-2009 04:10 PM

That table SUCKS!!!
Good job…..LOL

-- Jerry - Rochester, MN *Whether you think you can or you can't, you are probably right* - Henry Ford

View MyFathersSon's profile

MyFathersSon

180 posts in 1967 days


#13 posted 05-05-2010 07:24 PM

LOVE IT
I’ve been thinking of a downdraft table for some time—as an alternative to having shopvac hose hanging off my sanders—BUT—I have a small shop and dreaded having to make room to store it when not in use.
Building a new workbench is on my list for the spring. Had THOUGHT about incorpoating downdraft into it.
Thanks for letting me know I am not TOO FAR off base.

-- Those who insist it can't be done - should politely refrain from interrupting those who are doing it.

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