2HP HF DC Stovepipe Modification, tweaks, and plan of attack

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Forum topic by NBeener posted 01-05-2011 01:29 AM 6321 views 4 times favorited 46 replies Add to Favorites Watch
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4816 posts in 3139 days

01-05-2011 01:29 AM

Topic tags/keywords: dust collection dust collector dc harbor freight harbor freight 2hp dc stovepipe modification dust collector improvements

Some of you have probably heard of the ”stovepipe modification” for the Harbor Freight 2HP Dust Collector.

Long story short … you replace the existing 5” flex hose (running FROM the impeller TO the housing that holds the filter and plastic collection bag) WITH 5” single-wall stovepipe and a couple of 5” 45 degree elbows.

It looks like this … all taped up with “proper” duct sealing tape:

Sealing other potential infiltration points:

While I’d definitely like to plumb my shop, and put 5” or 6” galvy throughout, with drops to all the machines, blast gates, etc., etc. —we’re likely to move within the next year. Not sure how adaptable this setup would be to the “next” setup….

So …. my current plan of attack….

I’m running WAY too much flex hose (originally, nearly 40’, in total), and it’s pulling too much efficiency out of my system, when you factor in the 30gal chip separator, too:

So … I’ve ….

- moved my chip separator MUCH closer to the DC

- replaced THAT 10’ flex hose run with 4” galvy duct, a couple of 45 degree elbows, and a couple of short lengths of flex hose at each end:

I’m going to ….

- put one more 4” 45 degree galvanized elbows the remaining (intake) port, on the chip separator lid, to ease the torque on the hose … that … makes it want to kink,


- either .... live with my 4” 28’ long Rockler DustRight DC flex hose, for now, or …. replace IT with a couple lengths of 4” 26ga, galvanized duct, coupled together with a couple of short lengths of flex hose … to allow greater in-shop maneuverability to and between the power tools

- OR ... potentially … buy two blast gates for the Wye off of my DC, and then … run one port TO my chip separator (as described above), and … with the other port … bypass the chip separator, entirely, for the most CFM-demanding of the machines (ie, planer, jointer), using just enough flex hose.


The Placebo effect, on the suction, has been excellent so far !

Because I have a fair bit of time into this (and only a couple of bucks), I’ve convinced myself that these tweaks made a world of difference !

In truth …. there IS some difference. You get a sense for the suction at the end of the final hose … over time. I’m sure it’s a chunk better, now. Where it used to leave some shavings on the bed of my jointer and planer, now there are a scant few.

Using the “separator bypass” approach … running the hose straight from the DC to the planer/jointer … there are NO shavings left behind !

Cleaning up my act …. while I await the arrival of The Really Big Forstner Bit … to get the vise installed, and finish my workbench :-)

-- -- Neil

46 replies so far

View Loren's profile


10260 posts in 3612 days

#1 posted 01-05-2011 01:34 AM

Any workshop puttering that delivers a verifiable placebo effect
gets a thumbs up from me.

View NBeener's profile


4816 posts in 3139 days

#2 posted 01-05-2011 01:36 AM


-- -- Neil

View SPalm's profile


5317 posts in 3847 days

#3 posted 01-05-2011 01:45 AM

Good for you Neil. Every little bit helps.

All of a sudden I am singing “If I only had a heart, ta da, ta da, ta da”.
Thanks for the song. Not. So I thought I would put it in your head too.


-- -- I'm no rocket surgeon

View Eric_S's profile


1565 posts in 3160 days

#4 posted 01-05-2011 01:48 AM

Good idea Neil. I have a one tool at a time DC (Delta 50-720 CT) with a 10’ DustRight flex hose. I was debating if it was worth it to go to a straight run, but then it would be difficult to really move it around easily so I still have to think it through. I like your setup though.

-- - Eric Noblesville, IN

View Hoakie's profile


306 posts in 4001 days

#5 posted 01-05-2011 01:49 AM

Just a quick question….Is that a remote control Long Ranger you have on the DC? I have the one controlled by the blast gates but apparently the current draw is too large for the internal relay and it kept welding open after a while (at least the two I tried). If that model has worked for you, I’d be interested in trying it out.

-- John H. [To invent, you need a good imagination and a pile of junk. ~Edison]

View grizzman's profile


7836 posts in 3268 days

#6 posted 01-05-2011 02:05 AM

all this talk about dust collection…yea right…you look close to this set up he has going….BOY HES RUNNIN MOON SHINE IN THAR….A I SMELL CORN LIQUOR IN THAR…...THAT AINT NO DUST COLLECTOR…thats a still.. move the camera over and you would see the copper pot…lol…....could not resist that one neil…....its sure looking good…by the time your done you will have a pretty good and efficient system…good job .

-- GRIZZMAN ...[''''']

View NBeener's profile


4816 posts in 3139 days

#7 posted 01-05-2011 02:16 AM

Steve: LOL ! It IS a bit of a tin man, isn’t it ?!

And … grizz .... one word for you, my friend:


That IS only one word, right ? ;-)

-- -- Neil

View patron's profile


13600 posts in 3306 days

#8 posted 01-05-2011 02:30 AM

if it


that’s good !

-- david - only thru kindness can this world be whole . If we don't succeed we run the risk of failure. Dan Quayle

View HorizontalMike's profile


7749 posts in 2879 days

#9 posted 01-05-2011 02:33 AM

Geez! I think this whole conversation sucks! LOL!

I am of the one tool DC at-a-time camp, and thus use the flex tube. The planer gets a 20’ run and the TS, BS, jointer, and router can all be reached with the same 10’ hose running to a Thien separator/HF-DC. One man shop and it only takes a few seconds to change the hose hook-up. No complaints.

-- HorizontalMike -- "Woodpeckers understand..."

View Mark's profile


1807 posts in 3239 days

#10 posted 01-05-2011 02:36 AM

neil, i feel like i’m watching the red green show with all that duct tape lol :P

-- M.K.

View Bothus's profile


441 posts in 3141 days

#11 posted 01-05-2011 02:42 AM

That’s pretty cool Neil.

Just one question, I’ve used tons of duct tape in my life but I’ve never seen it used for taping ducts together, how did you ever come up with that idea? Shear genius!


-- Jerry Boshear, Professional Kitchen Designer, amature woodworker.

View Brad_Nailor's profile


2539 posts in 3922 days

#12 posted 01-05-2011 02:51 AM

Wow Neil…any chance that rig could become “self aware” and attack you?
I wasn’t aware that flex hose robs efficiency from your dust it the ridges?


View Paul C.'s profile

Paul C.

154 posts in 3210 days

#13 posted 01-05-2011 03:38 AM

I replaced all my spiral duct with 4” pvc pipe, about 25 ft in all. I also took out all the 2.5 inch and reduced my 90 degree turns to 0. It made a heckuva difference. Like having a new DC. I only connect the cyclone between my ducting and the planer. That alone has made a world of difference.

This is not to say that I am not trying to figure out how to put a clearvue or an oneida in my shop, tho’

View jack1's profile


2102 posts in 3992 days

#14 posted 01-05-2011 04:08 AM

You would have make Rube Goldberg proud, (sniffs silently). Nice work.

-- jack -- ...measure once, curse twice!

View Beginningwoodworker's profile


13345 posts in 3638 days

#15 posted 01-05-2011 04:15 AM

Good idea, Neil.

showing 1 through 15 of 46 replies

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