Dust collection advice - Router Forums
LinkBack Thread Tools Display Modes
post #1 of 22 (permalink) Old 09-11-2014, 08:09 PM Thread Starter
Registered User
Join Date: Jul 2014
Country: United States
First Name: Mike
Posts: 16
Question Dust collection advice

I am ready to set up my dust collection. I have HF collector. The collector has a 5 inch outlet with a 4" y adapter. I want to use 6" ducting for the main run. Can I eliminate the "Y" adapter and use an adapter to go from 5" to 6'' at the outlet? Also I would like to eliminate the bags altogether and vent directly to the outside. Are there any issues in doing this??
Mike in Phx is offline  
Sponsored Links
post #2 of 22 (permalink) Old 09-11-2014, 08:41 PM
Registered User
Join Date: Jun 2011
Country: United States
First Name: Duane
Posts: 1,709

You would still have a 5" minimum size restricting air flow. I have the same 5" limitation on my Grizzly. I have thought about just cutting the hole out to 6", or just replacing the cover/port with one from a newer 6" model.

As for venting outside, it will work well enough. But, if your are conditioning the inside air, could raise your air conditioning cost considerable. Also need to think about where the dust is going to go... have open space enough that it won't bother you or your neighbors... should be ok.

I have found that hand tools are the best choice when I want to make mistakes at a slower rate of speed.

I don't suffer from insanity. I enjoy every minute of it.
Dmeadows is offline  
post #3 of 22 (permalink) Old 09-11-2014, 11:17 PM
Registered User
MAFoElffen's Avatar
Join Date: Jun 2012
Country: United States
First Name: Mike
Posts: 2,369

I'm assuming you bought the 2HP DC? What is the length of your run? The number of drops and what diameter are they?

I have that DC. only a 20 foot run with 2- 4" drops with gates, 2 2-1/2" drops with gates.... 4" and 2-1/2" pairs. One pair at 10', other at the end at 20'... I used 4" ABS for my run, and used 4" abs tees. Adapted the 4" ABS drops to DWS. from there to hoses.

I have a trash can cyclone separator before the DC, then a cartridge filer in place of the filter bag.

That DC would not keep up with my TSS saw. It has a 4" DC and the base, 3" on the overhead guard. I had to mod it with a 12" impeller to up the flow. Then have to use a cartridge because the mod and increased flow cause too much back pressure at their filter bag (not enough flow through it). The vacuum itself stock was less than 7 water ". Afetr mod... if I use a single 1-1/4 hose to a smaller tool, I have to partially open another gate to keep from callaing the drop lines or my HD metal trash can separator.

Let me explain what Duane was implying about changes of diameter ducting. DC's work through flow rate to keep the particle suspended until they get to a separator, where the particles then lose suspension. That is why separators work... the flow opens up in diameter, a cyclone swirl effect, where the particles move to the outside, where it loses speed and drops out of suspension. You get from a 4" inlet in the separator, at an angle to cause a swirls, into a large area... and there is varied speed of flow from the center to the outside diameter.

Say you start at 4" duct at your table saw. You get to the 5" duct... and you will lose some of that suspension. True, overall, the flow will be the same throughout, because you have nothing less than 4" but the flow rate will still vary between the two ends.

Now, with a small DC that was over-etstimated on it's flow... something like that will lose some of your effectiveness where it might effect your flow... or not. If a short run run, you might not even notice...

"Don't worry, I saw this work in a cartoon once."
"Usually learning skills and tooling involves a progression of logical steps."
MAFoElffen is offline  
Sponsored Links
post #4 of 22 (permalink) Old 09-12-2014, 07:02 AM
Registered User
PawPawRay's Avatar
Join Date: Apr 2009
Country: United States
First Name: Ray
Posts: 54

That's what I'm working on now for my shop. I made a cyclone collector that catches all the large stuff and the back of my shop faces woods so the small particles will just blow off into nowhere. My shop is only 20 x 20 and I have adapted all my tools to accept the same size hose connecter. Bought an outside dryer vent that closes when the air is not flowing on the outside of the shop. Will update when I get it finished.
PawPawRay is offline  
post #5 of 22 (permalink) Old 09-12-2014, 07:33 AM
Registered User
Gene Howe's Avatar
Join Date: Jul 2007
Country: United States
First Name: Gene
Posts: 10,963

Mine is the same DC. Can't comment on the hose sizes as everything mine connects to is 4". Well, one comment...why not use a 5" to 4" reducer at the machines?
Mine is vented outside. My shop is 24X36 and it's heated. Have not noticed an appreciable loss of heat by venting outside. Did notice an appreciable increase in the DC's efficiency and really like the added space by getting those bags out of the shop. Not to mention not having to empty and clean them.
I'm in N. AZ at 6500', so AC is not the concern it might be in PHX.

Gene Howe
Snowflake, AZ

'The true soldier fights not because he hates what is in front of him, but because he loves what is behind him.' G. K. Chesterton

Please edit your profile with a name and location so we can better assist you and make for a friendlier forum.
Gene Howe is online now  
post #6 of 22 (permalink) Old 09-12-2014, 07:46 AM
Registered User
Join Date: Aug 2012
Country: United States
First Name: Dick
Posts: 802

Hi Mike, This explains what I did in our small shop. Although we are only using a 1HP HF unit, it does work very well. We have absolutely no problems with fine dust outside on the grass or sidewalk.



Where there's a Willis there's a way!
Willway is offline  
post #7 of 22 (permalink) Old 09-12-2014, 08:55 AM
Registered User
Join Date: Feb 2010
Country: United States
First Name: Richard
Posts: 434
Send a message via Skype™ to rwbaker

Dust collection is an entire subject unto itself. Remember there are several components to running HVAC (that's what it really is) The larger the line dia the lower the velocity and thus you may not be able to move objects and dust may accumulate on the walls as the velocity is lower due to laminer flow charasteristics. A 2" line will provide greater velocity but lower total CFM. The only generality that seems to work is buy the most CFM and vacum pressure (-"Hg) you can afford and let it suck like the dickens, other than that use your pen and paper before you purchase anything.

Good Luck Baker
rwbaker is offline  
post #8 of 22 (permalink) Old 09-12-2014, 11:34 AM
Registered User
tvman44's Avatar
Join Date: Jun 2013
Country: United States
First Name: Bob
Posts: 577

You could adapt the 5" to 6", don't know if you would gain enough to be worth it or not. I plan to vent my 2Hp HF outside when I get a chance, I already vent my 1Hp HF outside and like it. Both of my DC's pull through a Thien style separator and I really like that.

Papa Bob
Using a couple of old Craftsman routers & a Bosch 1617EVSPK & a Dewalt DWP611PK Routers in SW Louisiana.
tvman44 is offline  
post #9 of 22 (permalink) Old 09-13-2014, 11:42 PM Thread Starter
Registered User
Join Date: Jul 2014
Country: United States
First Name: Mike
Posts: 16

Thanks for all the info. I am not quite sure what to do at this point. My shop is a barn design so I have plenty of room on the second level for the DC and to run the main ducting and then down through the ceiling for the secondary's . With this in mind I really need to get it right the first time. I have attached a diagram of the way I intend to lay out my shop. Any constructive criticism, suggestion's would be appreciated .
Attached Thumbnails
Click image for larger version

Name:	Shop Layout.jpg
Views:	70
Size:	983.5 KB
ID:	73703  

kbill likes this.
Mike in Phx is offline  
post #10 of 22 (permalink) Old 09-14-2014, 10:25 AM
Moderation Team
Cherryville Chuck's Avatar
Join Date: Sep 2010
Country: Canada
First Name: Charles
Posts: 15,904

Mine runs around the perimeter of my shop so I'm not sure how well your idea will work. It will require more energy to lift the particles to the loft than my method. That is a fact of physics. I just don't know how much more energy will be needed and whether some of the material will drop out of suspension or not get picked up. Since you say this is a one time shot it would be a good idea to do some testing first and try putting your DC in the loft and run a hose down the outside wall and see what it can pick up and whether a bunch of dust comes back down the pipe when you turn the DC off.

Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.
Cherryville Chuck is offline  

Quick Reply

Register Now

In order to be able to post messages on the Router Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Similar Threads
Thread Thread Starter Forum Replies Last Post
Index of Dust Collection Solutions and Comments allthunbs Shop Safety 28 03-14-2014 01:40 AM
My Dust Collection System MAFoElffen Tools and Woodworking 19 05-23-2013 03:39 PM
Dust Collection on Table Saw Router Table Extension Guitarman1 Table-mounted Routing 0 10-02-2011 02:32 PM
Oak Park Dust Collection kawisser Table-mounted Routing 3 08-18-2011 07:32 PM
Dust Collection Question Tigerpaw Table-mounted Routing 17 04-16-2009 04:42 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome