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Down draft bench modification

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Project by Hoakie posted 11-14-2010 05:17 AM 3944 views 13 times favorited 17 comments Add to Favorites Watch

I realized that I needed to do something about controlling dust while sanding my first bandsaw box. I’ve seen many downdraft plans and vowed that I would make one one day. I didn’t want another piece of furniture so I decided to integrate it into my general purpose bench/outfeed table. I built downdraft box and cut the hole in the top of the bench. I also had to do a little duct work but in about an hour I had a very functional spot for sanding.

-- John H. [To invent, you need a good imagination and a pile of junk. ~Edison]





17 comments so far

View RussInMichigan's profile

RussInMichigan

496 posts in 1526 days


#1 posted 11-14-2010 05:24 AM

Okay, I liked the bandsaw box a lot, but I have to make one of these tomorrow morning. Thanks.

View shipwright's profile

shipwright

5299 posts in 1544 days


#2 posted 11-14-2010 05:26 AM

I have a hinged section of my big wall cabinet / bench top that exposes a grid with a 4” DC connection. It works great as I’m sure yours does. It’s really nice to sand without a mask isn’t it? I like your steep angled sides. Mine are shallower to allow more space under the cabinet but I have standing dust in there a lot of the time.

-- Paul M ..............If God wanted us to have fiberglass boats he would have given us fiberglass trees. http://prmdesigns.com/

View Mark Whitsitt's profile

Mark Whitsitt

86 posts in 1725 days


#3 posted 11-14-2010 05:34 AM

Sweet!

-- -- "there are many good reasons to use old hand tools, but moral superiority is NOT one of them..."

View Robsshop's profile

Robsshop

815 posts in 1721 days


#4 posted 11-14-2010 05:42 AM

I have so many shop projects on my to do list its hard to keep them straight,but I really want to build a DD table. Your version is a good looking blue print to start with! Does this particular design with the drilled PVC duct work as well as You hoped and does it seem to pull most ,if not all of the dust when in use? Thanks for the post and looking forward to any responses ! As always,be safe, ROB

-- Rob,Gaithersburg,MD,One mans trash is another mans repurposed wood shop treasure ! ;-)

View Hoakie's profile

Hoakie

306 posts in 2782 days


#5 posted 11-14-2010 06:33 AM

Rob,

This design seems to be popular and it works as well as I hoped it would. I have not done a ton of sanding with it but so far nothing seems to escape when hand sanding. Tests with the the ROS show that it can kick some dust past the “grasp” of the DD table but I guess i don’t expect it to get everything. That said, I’d say most of the dust is captured. My biggest regret is not adding it a while ago.

-- John H. [To invent, you need a good imagination and a pile of junk. ~Edison]

View twokidsnosleep's profile

twokidsnosleep

1063 posts in 1719 days


#6 posted 11-14-2010 11:12 AM

I like the design a lot; the incorporation into your working space is genius and no extra furniture a huge bonus.
Really well done.

-- Scott "Some days you are the big dog, some days you are the fire hydrant"

View Jamie Speirs's profile

Jamie Speirs

4163 posts in 1602 days


#7 posted 11-14-2010 11:30 AM

That is very clever.
Jamie

-- Who is the happiest of men? He who values the merits of others, and in their pleasure takes joy, even as though 'twere his own. --Johann Wolfgang von Goethe

View Jimthecarver's profile

Jimthecarver

1123 posts in 2531 days


#8 posted 11-14-2010 04:41 PM

Nice job, I noticed some dust was escaping out into the room from mine also. I fixed that by making an attachment that allowed me to use a small vac. hose directly to the sander. Now I dont need to wear a dust mask….but I still do.
Thanks for taking the time to share this.

-- Can't never could do anything, to try is to advance.

View mafe's profile

mafe

9670 posts in 1835 days


#9 posted 11-14-2010 08:04 PM

Really clever, and just the thought to be dustfree…
Best thoughts,
MaFe

-- Mad F, the fanatical rhykenologist and vintage architect. Democraticwoodworking.

View Chip's profile

Chip

1904 posts in 2838 days


#10 posted 11-15-2010 01:47 PM

Excellent piece John. I was thinking of making one of these and maybe putting sliding boards under the pegboard, sliding them open just enough for the size of what I’m sanding to increase sucking power whenever possible. Waste of time?

-- Better to say nothing and be thought the fool... then to speak and erase all doubt!

View Hoakie's profile

Hoakie

306 posts in 2782 days


#11 posted 11-15-2010 03:54 PM

Chip,

I’m sure that would work, however after thinking about it a bit, I kind of like the idea of having a larger down draft area surrounding the workpiece. As I mentioned earlier, the ROS can kick dust outside the pegboard area, but I’m guessing that a lot more dust is pulled in as it moves across the sheet. I know there is a point in which the surface area would become to large to pull enough air but I don’t think I”m there yet. My DD area is about 15”x22” with a 4” pvc pipe. I currently am using the 2HP HF dust collector with the Wynn cansiter filter (see shop pics).

Hope this helps.

-- John H. [To invent, you need a good imagination and a pile of junk. ~Edison]

View shipwright's profile

shipwright

5299 posts in 1544 days


#12 posted 11-15-2010 07:40 PM

Remember that fine dust collection is about volume of air, not speed of draft. My DD is about 2’ x2’ and the top is made of bars (50% open) with an open 4” DC hose in the bottom. I can see the dust from my ROS getting sucked down. None comes up.

-- Paul M ..............If God wanted us to have fiberglass boats he would have given us fiberglass trees. http://prmdesigns.com/

View wasacop75's profile

wasacop75

8 posts in 1902 days


#13 posted 11-15-2010 08:45 PM

I built a DD table for my CNC machine and added the pegboard sanding table on the other end. i used a furnace fan and a couple of filters. Not perfect, but my location isnt either.

-- No sawdust on the floor means no money in the pocket.

View Chip's profile

Chip

1904 posts in 2838 days


#14 posted 11-15-2010 11:56 PM

Thanks for the feedback John. Much appreciated.

-- Better to say nothing and be thought the fool... then to speak and erase all doubt!

View ~Julie~'s profile

~Julie~

578 posts in 1780 days


#15 posted 11-16-2010 05:22 PM

Thanks for posting, I need to make one similar.
Can you tell me why you have the perforated PVC inside the box?
Could it not just be an open area without holes that leads to the side PVC?

thanks again

-- ~Julie~ followyourheartwoodworking.blogspot.ca

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