Dust Separator Build part 2

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Blog entry by davidpettinger posted 04-09-2010 11:09 PM 3362 reads 1 time favorited 2 comments Add to Favorites Watch

Ok, dbhost and Purplelev, The verdict is in. It works like a champ. Although the 4” hose seems to have dropped some suction power, when down sized to the 2 1/2” hose even through the bast gates it does a great job. I have a little more tweaking, but I am going to build the stand for the DC, so I can put the Gcan under it. I only have to pipe one side of the shop. 20 ft of 4” hose, 1-Y, 2-blast gates, 2- 4 to 21/2 adapters, 20ft of 2 1/2” hose, and maybe a coupler.

Materials for the dust separator. 32 gal. Brute Garbage Can, 1- 16” circular piece of some type of wood or hardboard, 1 – 3 ft X 3” schedule 40 pipe, 2 – 3” 45’s, 1 – 3” long elbow, 1 – 3” coupler, 1/2” foam backer rod, d contact cement and a 6 X 6 piece of 1/4” hardware cloth.

Take the coupler and cut a 3/4 wide ring of of each end. These are to be slid up each pipe and PVC glued into place to secure the pipes and 45’s to the garbage can lid. Apply the contact cement to both the lid and the backer rod to secure them in place. ( I started with carpet tape, but that was temporary).

All holes through the wood baffle, are 3 !/4 inch. Staple the 1/4” hardware cloth over the center hole in the baffle.

When testing, the 4” hose sucked up the 3” plugs with ease. The drill press cleaned up nicely with the 2/1/2” hose. I imagine that the implode problem came from not using a Rubbermaid Brute can or hooking up a 3000 cfm unit. The DC strains when both blast gates are closed, but I think enough air gets past. Sure is going to make things easier for sawdust removal.

I’ll run some pictures of before and after trials tomorrow.

-- Methods are many,Principles are few.Methods change often,Principles never do.

2 comments so far

View fredf's profile


495 posts in 5172 days

#1 posted 04-10-2010 03:59 AM

As strange as it seems the dc doesn’t strain when the blast gates are closed the load is removed. if you block a shop vac input., the pitch rises as the motor runs faster with less load. you can overload a dc if you have a large input and nothing blocking it….. I went so far as to put an amp meter on it and watched the current drop

-- Fred, Springfield, Ma

View davidpettinger's profile


661 posts in 4663 days

#2 posted 04-10-2010 04:08 AM

Thanks fredf. I noticed that, I think it has to do with the impeller and chamber. But I am glad that the DC doesn’t scream like a shop vac. I think I would try and live with the saw dust rather than a 1 1/2 hp screaming vacuum. Thanks for the input, I appreciate it.

-- Methods are many,Principles are few.Methods change often,Principles never do.

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