LumberJocks

Fighting Dust #8: Dust Collector "Stove Pipe Mod"

  • Advertise with us
Blog entry by ChunkyC posted 926 days ago 2376 reads 0 times favorited 12 comments Add to Favorites Watch
« Part 7: Table Saw Dust Collection Mods - Completed Part 8 of Fighting Dust series Part 9: I won this battle, but the war is raging »

I’m going to give credit to NBeener for this one as he was the first person that I knew who done this. I hadn’t even heard of the mod until he mentioned one day in a thread. So thanks Neil!

This mod is silly simple although you will need basic metal cutting tools. This is an excellent time to clean and inspect your collector if it’s not a brand new one.

.
.

DISCLAIMER – The dimensions given are the dimensions that I used for my modification. Check yours! Yours could very easily be different than mine!
.
.

Tools:
Sharpe
Measuring tape
Screwdriver for taking off the old hose
Shop Vac
Something to cut sheet metal, I used an angle grinder
a File for de-buring the metal
A pair of Gloves

Material:
5” Stove Pipe. I got mine at our local farm / hardware store. I suspect that just about anyplace that sells wood stoves or the likes will have stove pipe.

(2) Adjustable 5” fittings
(1) 24” x 5” section of pipe
Foil Tape. Don’t cheap out on the foil tape, no substitutions here.

Step 1) Unplug the collector. and remove the discharge hose. This is a great time to use the shop vac to clean up.

Step 2) Cut a 3” length piece of pipe off of the the FEMALE end. The female end is the end that doesn’t have the crimps going around it.

This piece will be used to connect one of the adjustable fittings to the round cyclone type thing. I have no idea what it’s called. It’s the piece that the filter and bag are attached to. How’s that? The Male end of the adjustable fitting won’t fit into the piece that’s sticking out so I needed an adapter.

Step 3) Place one adjustable fitting on the discharge of the blower, male end up

Step 3.1)Place the other adjustable fitting onto the cyclonic do-dad using the 3” piece of pipe that we cut, Male end up. (I used a couple small pieces of tape to hold the 3” pipe and fitting in place.)

Step 4) Adjust the two fitting until they “line up.” This can be challenging but stick with it. I assure you, there is a place where both fitting will line up and you can get a piece of pipe between them.

Step 5) Measure the distance between the fittings. Remember that the pipe is going to slide over one fitting and into another. Make the proper allowances for this! My pipe was 10”.

Step 6) Cut the pipe, file the rough edges and snap it together. WEAR GLOVES! Sheet metal will cut you like a razor blade.

Step 7) Install the pipe between the two fitting, female end will go towards the blower and the male end will go towards the cyclonic do-dad.

Step 8) Tape ALL of the joints. You’ll know if you missed any after you use your collector. You’ll see the telltale traces of dust coming out where you missed.

That’s it. You can probably do this mod in about 30-60 minutes. You’ll spend twice the time putting the tape on that you will doing anything else.

Some other “Mods” that you can do while you’re here.
Cut that stupid guard out of the inlet to the blower. I thought that I had already cut mine out only to find that mine was still there and it was plugged! I FINALLY think that I have found the decrease in performance that I have been complaining about the past few months. Now that I think on it, if you’re not using a pre-separator, you may want to leave the stupid thing in there. Just know that it’s going to collect shavings and all sorts of detritus!

Tape EVERYWHERE! You can see, again thanks to Niel, that I have tape around the blower. This was already done on mine but it’s something that you can do if you haven’t already.

I noticed that my collector is leaking around the motor and the blower housing. Unfortunately I don’t have any caulk on hand or I would caulk that joint.

-- Chunk's Workshop pictures: http://spadfest.rcspads.com/thumbnails.php?album=135



12 comments so far

View Mark Shymanski's profile

Mark Shymanski

4982 posts in 2308 days


#1 posted 914 days ago

This looks interesting,but I missed Neil’s reason for doing this. Why would you do this?

-- "Checking for square? What madness is this! The cabinet is square because I will it to be so!" Jeremy Greiner LJ Topic#20953 2011 Feb 2

View ChunkyC's profile

ChunkyC

856 posts in 1849 days


#2 posted 914 days ago

Smoother pipe means less resistance to air flow. Granted, we’re not talking a lot of improvement but a little here, a little there, ...

-- Chunk's Workshop pictures: http://spadfest.rcspads.com/thumbnails.php?album=135

View NBeener's profile

NBeener

4806 posts in 1769 days


#3 posted 914 days ago

Great step-by-step, Chunk. Thanks for laying it out there.

Mark: Agreed. It’s all about little things, in an effort to gain incremental improvements. There’s really NO way to get a true 1,200 CFM out of a 2HP HF DC, but … gains are gains, and …. until I eventually go big, and do a ducted 3-ish HP cyclone … I’ll keep looking for the incremental boosts.

If memory serves, every foot of corrugated flex hose is equivalent to about THREE feet of galvy duct or TRUE smooth-bore hose, in terms of how much static pressure it adds (and how much that hurts your CFM).

Yes, this is a short run, but … in the effort to eek out max performance from lower dollar DC’s … I think it’s worth doing.

I noticed some leakage on my impeller housing, too. Much ? No. But … since I had the tape, already … figured I’d just seal it up.

And … Chuck ? It needs to be said: your DC system really is starting to suck :-)

-- -- Neil

View Mark Shymanski's profile

Mark Shymanski

4982 posts in 2308 days


#4 posted 914 days ago

Thank you for the explanation! I knew there was loss with flex hose, I didn’t realize it was as high as that. Makes me wonder if I should do this to my dc?

-- "Checking for square? What madness is this! The cabinet is square because I will it to be so!" Jeremy Greiner LJ Topic#20953 2011 Feb 2

View NBeener's profile

NBeener

4806 posts in 1769 days


#5 posted 914 days ago

Wood Magazine seems to agree with my figures:

Try it ? Why not. Not expensive. Not difficult. Won’t hurt. Should help … if only slightly =)

-- -- Neil

View ChunkyC's profile

ChunkyC

856 posts in 1849 days


#6 posted 913 days ago

Mark,

There really isn’t any reason not to do it. I think the hardest part to this mod might be finding the 5” stove pipe. I got lucky my farm store had just what I needed in stock. I’m not sure if I mentioned it or not but the pipe that I bought was 28 gauge. Now that I think about it, you do need some way of cutting the pipe which might be a stopper for some. If you had too, you could even use a hacksaw to cut it.


(Click for a larger picture)

I would imagine that thinner wall HVAC duct would work just as well beings that the duct is under pressure and not in a vacuum.

-- Chunk's Workshop pictures: http://spadfest.rcspads.com/thumbnails.php?album=135

View Mark Shymanski's profile

Mark Shymanski

4982 posts in 2308 days


#7 posted 913 days ago

Hmm, I may swing by a hardware store…

-- "Checking for square? What madness is this! The cabinet is square because I will it to be so!" Jeremy Greiner LJ Topic#20953 2011 Feb 2

View ChunkyC's profile

ChunkyC

856 posts in 1849 days


#8 posted 913 days ago

I just reread this thread and it looks like I’m being a little pushy like I’m selling a used car. I apologize if I came off that way, it wasn’t my intention. It’s just a simple, quick and fairly cheep modification that you could do to gain a slight improvement in DC efficiency. I think I may have gotten a little over zealous.

-- Chunk's Workshop pictures: http://spadfest.rcspads.com/thumbnails.php?album=135

View NBeener's profile

NBeener

4806 posts in 1769 days


#9 posted 913 days ago

I don’t see it that way, Chunk.

We ARE the evangelists for Hot-Rodding the Harbor Freight 2HP DC’s.

Well … you, me, dbhost, and a handful of other True Believers ;-)

-- -- Neil

View DIYaholic's profile (online now)

DIYaholic

12852 posts in 1270 days


#10 posted 913 days ago

I Believe!!!

My 35A274NANO canister filter & Long Ranger III arrived last week. I’m puchasing a 31 gallon galvanized trash can today. I already have almost ALL materials for the Top Hat Thein Baffle. I just need to finish building lumber storage rack & de-cluster f%<k the work shop (nothing is set up, just piled up while painting). Then my first shop project is to Hot Rod my 2HP HF DC!

I Believe there is not enough time in my day!!!

-- Randy-- I may not be good...but I am slow! If good things come to those who wait.... Why is procratination a bad thing?

View NBeener's profile

NBeener

4806 posts in 1769 days


#11 posted 913 days ago

[as is the custom, among the HFDCHRA (Harbor Freight Dust Collector Hot-Rodders Anonymous) meetings …..]

Hi, Randy !

-- -- Neil

View DIYaholic's profile (online now)

DIYaholic

12852 posts in 1270 days


#12 posted 913 days ago

Hi Neil

My name IS Randy…...and I am (going to be) a Harbor Freight Dust Collector Hot-Rodder! It all started when I was surfing the HF website, when all of a sudden….......

Where is the coffee?

-- Randy-- I may not be good...but I am slow! If good things come to those who wait.... Why is procratination a bad thing?

Have your say...

You must be signed in to post the comments.

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.

Latest Projects | Latest Blog Entries | Latest Forum Topics

HomeRefurbers.com

Latest Projects | Latest Blog Entries | Latest Forum Topics

GardenTenders.com :: gardening showcase