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Suggestions for a home made dust collector.

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Forum topic by giser3546 posted 31 days ago 552 views 0 times favorited 21 replies Add to Favorites Watch
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giser3546

81 posts in 70 days


31 days ago

With the addition of a planer to my shop I now need a dust collector. It has to handle at least 625 CFM, and its a garage shop so I need it to not take up too much space and not be too loud. I’d rather not spend too much money on this and was hoping I could put one together myself. I have seen some promising ideas involving the blower from a dryer and was wondering if anyone has made something like this before.

-- "If you wait for it to rain, It will"


21 replies so far

View ducky911's profile

ducky911

201 posts in 1387 days


#1 posted 31 days ago

A small cheap quiet DC has yet to be invented.

What I have found is that manufacture lie about cfm (double) and dbs (10dbs). You could start your looking at the Grizzley site as they have many. I am not recommending them (although I have one) it is just that they have many types and sizes.

I think that we should all start telling sales people that we are going to test the suction and sound when the DC is delivered and if it is off we will send it back as defective.

View Fred Hargis's profile

Fred Hargis

1643 posts in 1091 days


#2 posted 31 days ago

You can put one together, but it won’t start with a clothes dryer blower (or did you mean grain dryer?) if you want to catch dust. Some basic DC stuff: capturing dust requires moving a LOT of air, more than your dryer blower (unless it is a grain dryer blower). To move 625 CFM (BTW, how did you get that number?) you will probably need a 1.5 HP blower with an 11” impeller minimum, connected to the planer with maybe a 5” duct (4” is only good for maybe 400-500 CFM). To do that will require you to spend some money, though looking for a good used one can save you quite a bit. But then all that air has to be filtered , or piped outside. The filters should be a minimum of 1 micron tightness, a lot of DC’ have 30 micron filters which make them little more than a dust recirculation pump.

-- I long for the days when Coke was a cola, and a joint was a bad place to be (Merle Haggard)

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giser3546

81 posts in 70 days


#3 posted 31 days ago

Yes I just looked at the average CFM of dryer blowers and its not up to par. The 625 figure came from the manuals for other similar planers like Jet, Powermatic, and shop fox. I do have an air cleaner I was hoping I could use to take care of the finer stuff the collector doesn’t get.

-- "If you wait for it to rain, It will"

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Fred Hargis

1643 posts in 1091 days


#4 posted 30 days ago

It’s a common opinion (mine included) that once tan ambient air cleaner gets the dust, it’s already in your lungs….so they don’t do much from a health perspective, though they are great for cleaning the air prior to finishing, etc.

-- I long for the days when Coke was a cola, and a joint was a bad place to be (Merle Haggard)

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giser3546

81 posts in 70 days


#5 posted 30 days ago

Well that seems to just about completely antiquate my air cleaner, which I wouldn’t completely agree with. Since I’ve gotten mine its been significantly easier to be in my shop after using my BS.

-- "If you wait for it to rain, It will"

View bigblockyeti's profile

bigblockyeti

1374 posts in 318 days


#6 posted 30 days ago

What model planer did you get? What cutterhead does it have? Which species do you work with primarily?

View jonah's profile

jonah

440 posts in 1896 days


#7 posted 30 days ago

No homemade solution is going to be price-competitive with something you could buy off-the-shelf.

The most common option among the budget-conscious is to pair the $150 Harbor Freight 2HP (realistically more like 1.75HP, but that’s a whole different kettle of fish) with a canister filter from Wynn Environmental ($125 or so, plus shipping), and a Thien baffle (maybe $30-40 in materials).

Alternatively, Grizzly makes a decently-priced line of dust collectors with built in canister filters.

625 CFM, once you add hoses to it, will collect only large chips and will not collect any of the dangerous fine dust.

View Fred Hargis's profile

Fred Hargis

1643 posts in 1091 days


#8 posted 30 days ago

Your air cleaner isn’t antiquated, or at least that isn’t what I implied (I hope). It has it’s uses, and they are good to have. But as I indicated, health isn’t one of them. To control the dangerous dust, it’s best done at the source with a DC.

-- I long for the days when Coke was a cola, and a joint was a bad place to be (Merle Haggard)

View Crank50's profile

Crank50

47 posts in 174 days


#9 posted 30 days ago

A CFM rating without an associated Static Pressure rating is meaningless when referring to a collector’s capacity.

The CFM requirement specified by an equipment manufacturer, on the other hand, is a real number.

The trick is to know how much pressure you will need to to generate a 625 CFM volume of air at the intake end of the collector’s duct system where it connects to the planer’s output.

The best bang for the buck I have seen in small collectors is the “2HP” collector from Harbor Freight Tools.
I have designed and built all kinds of environmental control systems over a 40 year career and I can’t touch the price of the HF collector with off the shelf components. You would be very hard pressed to even buy the motor for $150, much less the filter bag, bag holder, fan, etc.

Can the HF collector be improved? Absolutely. But, for the money it is an excellent place to start. Especially for a “one person” shop where you typically only collect from one machine at a time. I use mine with a 4” duct and a 2 1/2” duct open at the same time, but that’s the theoretical limit.

View giser3546's profile

giser3546

81 posts in 70 days


#10 posted 30 days ago

Its a 5 hp 20” Sunhill planer with straight knives. I am also looking to use it with my Laguna 14 12. and you guys are 100% right, the more research I do the more I’m thinking of using the 2 hp harbor freight dust collector. It seems to have plenty of good reviews and at under $200 it would probably cost me more (if you include the time i spend making it work) to try to build something that might not ever work.

-- "If you wait for it to rain, It will"

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giser3546

81 posts in 70 days


#11 posted 30 days ago

I’ve heard rumors of coupons for the 2 hp dc for $150… the best I’ve found are 20% off coupons.

-- "If you wait for it to rain, It will"

View bigblockyeti's profile

bigblockyeti

1374 posts in 318 days


#12 posted 30 days ago

Straight knives can create long chips, a 5hp 20” planer can create a lot of them. A 1.5hp dust collector with a very short hose should work for most applications (I use a 1hp on my 13” lunchbox planer). The bigger the better, especially if you plan on installing duct work at a later time.

View StumpyNubs's profile

StumpyNubs

6116 posts in 1398 days


#13 posted 30 days ago


I ve heard rumors of coupons for the 2 hp dc for $150… the best I ve found are 20% off coupons.

- giser3546

If you go to a book store and look through the woodworking magazines, you’ll find some Harbor Freight coupons. They almost always contain the coupon you’re looking for. I believe American Woodworker or Woodworker’s Journal is most likely to have them.

If you want some in depth information about dust collection, including seeing a giant homemade cyclone using two Harbor Freight blowers, with homemade duct work- here’s an episode we made some time ago:

-- It's the best woodworking show since the invention of wood... New episodes at: http://www.stumpynubs.com

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giser3546

81 posts in 70 days


#14 posted 30 days ago

Since the proper function of the planer will be dependent on the DC I will be putting the DC very close to it. In the long term I would like to extend ducting to my miter saw, but my main goal right now is getting my planer running and hook up my BS if time and materials allow. I have a floor standing drill press but considering the small amount of dust it makes its at the bottom of my list of priorities. I had been worried about fitting the large DC in my cramped shop but after seeing that video I obviously have nothing to worry about, seems like every tool he has is shoulder to shoulder with another. I appreciate the coupon suggestion and I will be sure to be caught tearing pages out of magazines at the book store this afternoon.

-- "If you wait for it to rain, It will"

View MT_Stringer's profile

MT_Stringer

1798 posts in 1829 days


#15 posted 30 days ago



I ve heard rumors of coupons for the 2 hp dc for $150… the best I ve found are 20% off coupons.

- giser3546

$149 is what I paid last year. Then I added the Wynn Env. filter…and built the Phil Thien separator. Works great, but not quiet.

-- Handcrafted by Mike Henderson - Channelview, Texas

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