On the Cheap Dust Collection for your shop

   / On the Cheap Dust Collection for your shop #1  

Schultz

Gold Member
Joined
Apr 3, 2002
Messages
409
Location
Dexter, MI
Tractor
BX-2200
I'm one of those weekend or more like after the kids go to bed type wood workers.
It all started one day when my neighbor cut down several 4-5' oak trees. I talked him into giving them to me a couple logs and I had them sawed into lumber. So, I had this big pile of lumber in the barn, then I got the bright idea of making solid replacement passage doors for all the rooms in my house. From the day, I saw the downed trees it ballooned into creating a whole wood working shop. It's been 5 years in the making but now I'm finally finishing the doors I set out to make. Planning boards, routering them creates a lot of saw dust. While routering the raised panels I ran out of patients constantly unclogging the small shop vac. I then decided to make a dust collector.

Anyway several years ago I collected a scraped out air handler fan from work. This one happened to have the paddle wheel type fan. I put a new motor on it, instead of a 1750rpm, I used a 3600rpm. Now it really moves the air. I connected 3" schedule 20 PVC pipe to it and connected it to my table saw, planer, jointer, and router with blast gates at each. The pipe, flexible pipe, and fittings cost about $50-60, the blast gates were $25. I didn't want the expense and maintenance of filter bags so I run it into a homemade cyclone collector outside the barn. This cyclone collector blows the dust into an open trashcan. This collector can be made completely from scrap. I used a 50 gal plastic resin barrel. You can get these free from any company that molds plastic, they throw them out all the time. Attached are some pics of the cyclone part. It all works great, and I whish I had made this one of the earliest additions to my shop. Now the shop is practically dust free and it only cost about $80.


The part that mates to the blower, blows the dust in on a tangent to the barrel, this gets the dust spiraling. The heavy dust then falls to the bottom and out the hole. There is also another hole out the top. The top lid also has a 8" hole and blows fairly clean air but it does contain some fine dust. At first I was skeptical if this would work since the bottom isn't cone shaped, but I thought try it, see and then modify as needed. It worked pretty good. I am going to add a 6" length of 8" stove pipe to the bottom so it pilots into the trash can better and deposits all the saw dust/shavings into the can.
 
   / On the Cheap Dust Collection for your shop
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   / On the Cheap Dust Collection for your shop
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   / On the Cheap Dust Collection for your shop #5  
Looks like a nice set-up.

For the fine dust in the air of the shop, my cheap way is to use a 20" x 20" furnace air filter propped up on the intake side of a window fan. On low or medium, it will circulate the air in the shop and keep the floating fine dust particles cleaned up. Along with a vacuum dust pick-up system, this works very well. Amazing how much dust gets picked up on this filter, and they are cheap to replace.
 
   / On the Cheap Dust Collection for your shop #6  
I'd like to see some pictures of the assembled cyclone.

Please be sure to have some method of grounding the PVC pipe. This is usually done by wrapping a copper wire around the pipe about once a foot and bring it all the way back to your cyclone, and then attach it to an earth ground or water pipe. Air flow within plastic pipe generates significant static electricity, and in combination with dust can be explosive.
 
   / On the Cheap Dust Collection for your shop
  • Thread Starter
#7  
No problem I'll get some more pic's of the blower and system.
Tim
 
   / On the Cheap Dust Collection for your shop #8  
Nice job Schultz. Yes, a separator seems like a good way to reduce the clogging of your vac. I have been looking at the grizzley one ( http://www.grizzly.com/products/item.cfm?itemnumber=G6102 ) for my shop vac collector. 20 bucks and a plastic bucket seems a pretty cheap way to extend the period between having to unclock the filter in the vac.

I just noticed their larger one is on sale at half price for 20 bucks. ( http://www.grizzly.com/products/item.cfm?itemnumber=G3376 ). More than you spent on your system but certainly not expensive.

I hope you remembered to run a bare copper ground wire inside your schedule 40 plastic to prevent static electricity. Dust explosions are no fun at all. I bought the booklet on dust collection basics from grizzley and it has a bunch of good info in it.
 
   / On the Cheap Dust Collection for your shop #9  
"I hope you remembered to run a bare copper ground wire inside your schedule 40 plastic to prevent static electricity. Dust explosions are no fun at all."

It may happen every day, but in years of monitoring wood-working forums and reading about dust collection systems I've never known or heard of it acually happening in spite of many people not grounding their colleciton hoses. My main lines are sch 40 PVC under the slab of my shop (wish they were 6" but too late now) with "wye's" off the trunk line through the floor. I ran *8 copper through the 4" main lines, fastened to a brass bolt through the wye just above the floor and connected to ground on my dust collector. All of my flex hoses have braided wire running through them, with the same wound spirally around the outside and fastened to the brass bolt by a nut when I connect the flex to the main line. The pleasing effect of all this is that I'm not shocked by the static electricity, and my hair doesn't stand on end while using the tools!

Beenthere: Another good filter for the fine dust can be made from a squirrel cage blower out of a used furnace. They can often be had cheap from HVAC service people in your area. Usually multi-speed. I used one and built a plywood box to contain it, with 20x20" openings on each side for intake and a 20x20 outlet. Framed the inlet/outlet openings to take two 1"x20x20 filters from Lowe's. Can't remember the brand, but on the inlets I used a fine (5 micron I think) 1x20x20 inside and a regular furnace filter outside. Using the regular filter extends the life of the more expensive inner filter. Reversed this on the outlet. Hanging from the ceiling it makes very little noise and has really made a difference in fine dust.
 

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