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Double Separator for Dust Collection?

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Forum topic by gauntlet21 posted 03-16-2018 06:39 PM 558 views 0 times favorited 6 replies Add to Favorites Watch
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gauntlet21

6 posts in 267 days


03-16-2018 06:39 PM

Topic tags/keywords: dust collector separator double idea design question vacuum

I currently have a 2HP Harbor Freight dust collector with a 55 gallon fiber drum dust separator inline. I’ve seen the Thein Baffle but don’t have that feature currently. My question/idea is to add another dust separator ahead of the 55 gallon fiber drum or one behind it. I’m wondering what the results would be. Right now I collect about 80% of the material in the 55 gallon drum and about 20% goes to the actual dust collectors bag. I’m simply looking to minimize the amount that gets to the bag. So if I had the vacuum hose attached to my jointer, then to the 55 gallon drum, then maybe a 30 gallon drum, and then the dust collector, I am wondering what kind of results that would generate. If anyone has attempted this, I’d be interested to hear your results/input.

Thanks,

Dan


6 replies so far

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Dustin

540 posts in 797 days


#1 posted 03-16-2018 07:21 PM

You’ll definitely end up with less in the bag, but I think that’s because you’ll collect less in general. Any kind of pre-separator cuts your cfm dramatically, especially poorly designed/cheap separators (like the trash can lid style). This will be made worse by the undersized impeller on the HF DC. If you’re looking for the max amount of separation without sacrificing any more air movement, I’d swap out whatever separator you’re using with an SDD. Depending upon how inefficient the current separator is, you might even see a slight (very slight) uptick in performance.

-- "Ladies, if your husband says he'll get to it, he'll get to it. No need to remind him about it every 6 months."

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Holbs

1897 posts in 2085 days


#2 posted 03-16-2018 11:07 PM

Consider, when you start up your DC, the air has to be sucked out of the 55 gallon drum first and then your 2nd 30 gallon drum, then dust collection starts to happen. That is a lot of air to move on a Harbor Freight dust collector. Heck, that would probably be a no go for my 3HP grizzly.
One nice thing about the Thein Baffle vs drum dust separator: the Thein Baffle only has to work with the volume of air above the baffle, not below the baffle while the drum separator has to work with the entire drum. Granted, still a loss of CFM but that is why it’s a DIY mod :)

-- The Carpenter Bee is derived from the Ancient Greek word wood-cutter

View Loren's profile

Loren

10476 posts in 3704 days


#3 posted 03-16-2018 11:20 PM

I think your separator lid just doesn’t work
very well.

I’ve used a Veritas separator lid and it really
gets almost all the planer chips. It’s patented.
Maybe worth a look.

View gauntlet21's profile

gauntlet21

6 posts in 267 days


#4 posted 04-29-2018 09:29 PM

Thanks much. Was just curious. My current setup is a 55gallon fiber drum with the Rockler Dust Separator fittings/ports. It pulls sufficient vacuum but was just interested in better separation. My plan is to swap out the cheap bag filter with a Wynn 35a or Oneida and eventually put a large Dust deputy on it. Also, I’d like to add the Rikon DC impeller for about $120. All of that would certainly improve my results. Just gotta check the circuit breaker for amperage and see if that will be an issue. Higher amperage is likely with those mods I believe?

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Dustin

540 posts in 797 days


#5 posted 04-30-2018 11:58 AM

You’ll pull more amps with the impeller upgrade, since the added weight makes the motor work harder. Mine is on a dedicated 20amp 110 circuit, and just the blower tripped the breaker. However, adding restrictions (filter, separator, piping, etc.) will lower the current draw of the blower. If you have access to an ameter, the clamp type, it may be useful to check your current draw so as to avoid burning out the motor prematurely.

-- "Ladies, if your husband says he'll get to it, he'll get to it. No need to remind him about it every 6 months."

View Andre's profile

Andre

1923 posts in 1862 days


#6 posted 04-30-2018 02:52 PM



I think your separator lid just doesn t work
very well.

I ve used a Veritas separator lid and it really
gets almost all the planer chips. It s patented.
Maybe worth a look.

- Loren

+1 I have the Veritas lid also, with a foam seal added to the lip attached to a 1.5hp general D.C. had to put baffle rings in 30 gal. heavy duty plastic garbage can because it collapsed first time it tried it.

-- Lifting one end of the plank.

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