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DC(Dust Collection) - Vertical Drops

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Forum topic by rance posted 979 days ago 1557 views 0 times favorited 18 replies Add to Favorites Watch
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rance

4130 posts in 1794 days


979 days ago

Topic tags/keywords: dust collection dc question

I looked for a forum related to the Shop, but no category seemed to fit.

I am assisting a good friend with installation of overhead pipes for his 2HP HF DC in his new shop. We have a 6” trunk with side runs coming off of it. I have some questions:

1) For machines that might need a large draw such as the TS or Planer, what would you recommend for a vertical drop from the ceiling to the machine, 4” or 6”? And why? Will a vertical run of 6” pipe generate enough velocity to bring the chips up an 8’ vertical section?

2) Also, other than cost and bulkyness, are there ANY disadvantages to using 6” pipe throughout, right down to the 4” machine port?

-- Backer boards, stop blocks, build oversized, and never buy a hand plane--


18 replies so far

View Les 's profile

Les

199 posts in 1324 days


#1 posted 979 days ago

I use 4” by 9’ drops without a problem. I have a 2HP grizzly DC, but I think it is the same unit. Make sure you have blast gates that shut off completely at each machine. You will need to concentrate all the volume to one machine at a time.

Les

-- Stay busy....Stay young

View rustfever's profile

rustfever

621 posts in 1944 days


#2 posted 979 days ago

Go to Bill Pentz site where he discusses the dust collection problems. www.Billpentz.com This guy is the Guru of dust collection for the woodworker.
Because of his advise, I have a very good working system that has never, [REPEAT…NEVER] had any problems and works flawleessly.

-- Rustfever, Central California

View rance's profile

rance

4130 posts in 1794 days


#3 posted 979 days ago

I read most of Bill’s site 2 years ago but I was looking for some real-world examples/results. Rustfever, what size verticals did you use?

-- Backer boards, stop blocks, build oversized, and never buy a hand plane--

View Sawkerf's profile

Sawkerf

1730 posts in 1702 days


#4 posted 979 days ago

None of my 6” ducting runs overhead, but every commercial shop DC system I’ve seen runs max diameter duct overhead with drops to the machines. Any reduction is near the machine.

The trick is to make sure that the duct is well sealed (I use aluminum duct tape on all seams and joints), and blast gates close completely. You want max air flow at the machine – not thru duct leaks or sloppy blast gates.

-- Adversity doesn't build character...................it reveals it.

View degoose's profile

degoose

6996 posts in 1988 days


#5 posted 979 days ago

The secret is air flow… unlike shop vacs that use vacuum, DC’s us air flow… the larger the diameter pipe the better and reduce closer to the machine… that said… I have all 4 inch ducting and it works very well..
Well sealed ducting and fully shut blast gates as previously mentions will ensure no loss of air flow..
I some times forget to shut a gate after using a machine and before using another… but I am learning…
Heck of a lot less dust in my shop since I installed the cyclone and ducting…
I also ran my ducting along the wall at 6 feet above the floor… not at ceiling height…

-- Drink twice... and don't bother to cut... @ lazylarrywoodworks.com.au For lovers of all things timber...

View Les 's profile

Les

199 posts in 1324 days


#6 posted 979 days ago

I have my unit in the corner of the shop and the main runs go both ways in 4” about 2’ off the floor. the vertical drops I talked about leave the main at 2’ off the floor and go up to 9’, across to the equipment out in the room and down to the equipment. It works just fine.

Les

-- Stay busy....Stay young

View rance's profile

rance

4130 posts in 1794 days


#7 posted 978 days ago

Thank you all for the information and input. Les, this is encouraging. I’m assuming you don’t have ANY 6” piping?

We will be smoke testing every nook and cranny to seal up the pin hole leaks.

-- Backer boards, stop blocks, build oversized, and never buy a hand plane--

View fussy's profile

fussy

980 posts in 1684 days


#8 posted 978 days ago

Rance,

Go to http://community.woodmagazine.com/5/Tools-and-buying/making-a-dc-flow-more-air/m-p/21457 for a rather over-the-top balls to the walls discussion on hotrodding a dc. Pick and choose what you want to do, but quite a bit of information there.

Steve

-- Steve in KY. 44 years so far with my lovely bride. Think I'll keep her.

View Joe Lyddon's profile

Joe Lyddon

7685 posts in 2686 days


#9 posted 978 days ago

@fussy:

Your Link is no good…

May I suggest Copying the complete URL like you probably did…
Then Select some Text that describes the link like “Click here to see…”...
Click the Chain Icon, push Backspace key to remove defaulted http, etc., then
Paste the full URL, &
click OK.

Then, the FULL Link will be used…

All URL links should be entered in this manner to ensure them to be present & used 100% and not get contaminated.

-- Have Fun! Joe Lyddon - Alta Loma, CA USA - Home: http://www.WoodworkStuff.net ... My Small Gallery: http://www.ncwoodworker.net/pp/showgallery.php?ppuser=1389&cat=500"

View Les 's profile

Les

199 posts in 1324 days


#10 posted 978 days ago

Rance,

I have no 6” piping. The inlet to the fan is 6” with a Y coming off with two 4” inlets. I just set it in the corner and come off of it both ways. I use 4” pvc drain pipe and slip fit the joints, no glue, I use self tapping Sheet metal screws to hold the fittings together. It works great.

Les

-- Stay busy....Stay young

View rance's profile

rance

4130 posts in 1794 days


#11 posted 978 days ago

Thanks again guys. Here’s a working fussy link:

Making a DC flow more air

I’m sure even this new link above will eventually go stale so when it does, just Google:
  ”Making a DC flow more air” woodmagazine

I read the article. Pretty impressive. Looks like all the restrictions were eliminated at the DC. Only ones left are in the piping. Thanks again Les/Steve. I REALLY appreciate the input and the answers to all my questions.

-- Backer boards, stop blocks, build oversized, and never buy a hand plane--

View fussy's profile

fussy

980 posts in 1684 days


#12 posted 978 days ago

There you go, Rance. I left out tool or some such. Joe, I apologize for mis-typeing the url, but right now, all that formatting #>**&^ is beyond my ken.

Steve

-- Steve in KY. 44 years so far with my lovely bride. Think I'll keep her.

View Elizabeth's profile

Elizabeth

797 posts in 1777 days


#13 posted 978 days ago

I have 6” piping running up from the DC to the ceiling, with a 4” runoff on this vertical section heading to a belt sander. The 6” runs along the ceiling for the length of the shop and never leaves ceiling level after that first rise.

First there’s a 4” runoff and drop to the bandsaw. The next split is a 5” drop which ends in a three way splitter going to 4” flexhose for planer, jointer and floor sweep. The next split is for the table saw – 6” runs across the ceiling and then reduces to 4” for the drop. Next after the table saw split is a 4” drop down for the miter saw and router. Then the ceiling run decreases from 6” to 5” before heading to the final drop which is another 4” to the spindle sander. You can see a pic of some of it in my workshop profile page and some of the installation on this thread.

View Joe Lyddon's profile

Joe Lyddon

7685 posts in 2686 days


#14 posted 978 days ago

@fussy,

”Joe, I apologize for mis-typeing the url, but right now, all that formatting #>&^ is beyond my ken.”

Fussy, I never ‘type’ a URL…
I Select, Ctrl-C to Copy, and Ctrl-V to Paste... A URL, no matter how long it is, is just that easy to do.

If you do not understand that, I’d be happy to privately instruct you… It’s really very simple…

Hope you had a nice Christmas…

-- Have Fun! Joe Lyddon - Alta Loma, CA USA - Home: http://www.WoodworkStuff.net ... My Small Gallery: http://www.ncwoodworker.net/pp/showgallery.php?ppuser=1389&cat=500"

View fussy's profile

fussy

980 posts in 1684 days


#15 posted 977 days ago

Joe,

You danged young whippersnappers and your grasp of technology! Thanks for the help and the kind offer. I think I have it now. Have a safe and happy new year. While you young’uns are out partying to all hours, I’ll be drinking milk of magnesia and watching my teeth soak whilst listening to Lawrence Welk on the gramaphone. Have a good one.

Steve

-- Steve in KY. 44 years so far with my lovely bride. Think I'll keep her.

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