# Dust Collection 5" to 6"

 Forum topic by Bieser posted 11-06-2012 04:14 PM 1124 views 0 times favorited 8 replies
 Bieser176 posts in 2032 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

 Fred Hargis4986 posts in 2491 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, he was elected to congress. crank494030 posts in 2969 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 lossLess pressure loss = increased CFMBut increase in CFM = more velocitymore velocity = increase in pressure lossetc., 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. Bieser176 posts in 2032 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. Bieser176 posts in 2032 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. dbhost5710 posts in 3230 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. -- Please like and subscribe to my YouTube Channel https://www.youtube.com/c/daves-workshop Bieser176 posts in 2032 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. dbhost5710 posts in 3230 days #7 posted 11-06-2012 05:57 PM Use no thinner than 28 ga. The 30 ga metal duct is known to collapse. -- Please like and subscribe to my YouTube Channel https://www.youtube.com/c/daves-workshop MonteCristo2099 posts in 2186 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""

## Have your say...

 You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

 Fireplace Mantel 05-12-2018 09:20 PM Custom Staircase and Handrail 05-06-2018 06:30 PM 50 ft deck 04-27-2018 04:30 PM Bathroom renovation London 04-13-2018 01:29 AM Bathroom Vanity 02-01-2018 09:49 PM folding chair hangers 01-29-2018 01:02 AM Building a built in bookshelf with arch top 01-19-2018 05:48 PM Building a Japanese Timber Frame Inspired front door 12-15-2017 10:54 PM Building a Timber Frame Staircase with through tenons held with wedges 12-07-2017 09:08 PM bathroom vanity re-do 06-07-2017 01:30 AM