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Dust Collection 5" to 6"

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Forum topic by Bieser posted 11-06-2012 04:14 PM 655 views 0 times favorited 8 replies Add to Favorites Watch
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Bieser

175 posts in 691 days


11-06-2012 04:14 PM

Would I see any benefit from my dust collector with a 5inch out-put to run 6 inch pipe as main line in shop. I would assume it could only move the amount of air at the initial dust collection port but I could be wrong? I have a small shop 14×24 and just want to try and keep as many mistakes down as possible.

Thanks B.


8 replies so far

View Fred Hargis's profile

Fred Hargis

1792 posts in 1149 days


#1 posted 11-06-2012 04:35 PM

If the DC is large enough to support a 6” run, I would put that in. Then I wouldn’t be constrained by the puny DC ports on a lot of tools; upsize them to whatever you can work in to the space. But if the DC isn’t large enough to support the 6” main run stick with the 4”

-- Our village hasn't lost it's idiot, we sent 'em to Washington.

View crank49's profile

crank49

3434 posts in 1627 days


#2 posted 11-06-2012 04:40 PM

It’s all a matter of balance.
Bigger pipe = lower velocity of the air stream
Lower velocity = less pressure loss
Less pressure loss = increased CFM
But
increase in CFM = more velocity
more velocity = increase in pressure loss
etc., etc.

There is one single simple answer to your question.
It depends on your collector, its CFM capacity at what pressure, what horse power, what length of duct run.
A Harbor Freight 2hp collector is optimum with a 4” and a 2-1/2” dict connected and both open at the same time, for instance. Your collector may have totally different characteristics.

-- Michael :-{| “If you tell a big enough lie and tell it frequently enough, it will be believed.” ― A H

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Bieser

175 posts in 691 days


#3 posted 11-06-2012 05:30 PM

Well Im not sure. I have custom built one in a way my collector. Im using the prop and motor off of a harbor freight collector and exhausting outside so no filter. on the large onieda dust deputy cyclone. The input i guess on that cyclone is 5 inch. I would say the longest run would be something like 24-26’ total length up/down and across.

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Bieser

175 posts in 691 days


#4 posted 11-06-2012 05:31 PM

So to clear it up. It will be an onieda cyclone with a harbor freight collector and no filter if that makes sense.

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dbhost

5385 posts in 1888 days


#5 posted 11-06-2012 05:34 PM

Lots of guys run 6” on the HF 2HP DC and report good results. I am honestly leery of the idea… Stick with 5” if you can. Biggest problem with 5” is lack of 5” PVC, so everything is metal, and thus more expensive to run.

-- My workshop blog can be found at http://daves-workshop.blogspot.com

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Bieser

175 posts in 691 days


#6 posted 11-06-2012 05:46 PM

I am planning on running metal anyway just going to use ducting you can get at big box stores. I dont think I will have any problems with them wanting to collapse with this collector. Seems like the plastic vs. metal always starts a debate so we will stay away from that.

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dbhost

5385 posts in 1888 days


#7 posted 11-06-2012 05:57 PM

Use no thinner than 28 ga. The 30 ga metal duct is known to collapse.

-- My workshop blog can be found at http://daves-workshop.blogspot.com

View MonteCristo's profile

MonteCristo

2097 posts in 845 days


#8 posted 11-08-2012 03:55 AM

For 6” pipe you’ll need a collector powerful enough to create adequate air speed otherwise the dust/chips will stall. Also, except for a big planer or similar, do you really need 6” pipe ? Most people seem to use 4”, especially if a guy is only running one machine at a time.

-- Dwight - "Free legal advice available - contact Dewey, Cheetam & Howe""

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