Does Anyone Know Why There is a Hose Connected to this Dust Collection Bin?

[onocoffee]

Was looking at photos of different dust collection systems and noticed this feature on a few units. There will be some kind of hose connected to the dust collection bin (the bin where the dust falls into from the cyclone separator). For example, in this Laguna D-Flux.

What does this do? Thanks!

 

[jeffinsgf]

If you're using liner bags...as opposed to just directly into the can...that hose equalizes the pressure and keeps the liner from being sucked up into the dust collector.

EDITED TO ADD: ...or just collapsing in on itself.

 

[4nthony]

Interesting. I noticed this guy had a hose on his updated Home Depot separator as well.

 

[cpw]

If you're using liner bags...as opposed to just directly into the can...that hose equalizes the pressure and keeps the liner from being sucked up into the dust collector.

EDITED TO ADD: ...or just collapsing in on itself.

Oneida's solution to that problem is a bit lower tech. They have a large plastic ring the shape of the drum that you stick inside your the bag to hold it against the walls. When changing the bag, you pull the ring out of the drum; then take your bag out. After putting in the new bag, but before attaching the lid, you put the ring back.

 

[jeffinsgf]

May be lower tech, but I bet it's more functional. I had a Dust Gorilla with the pressure return hose and it was only marginally effective. I eventually gave up on the bags, which partially defeats the purpose of the dust collector. Emptying a bin...particularly a seriously undersized one that fills up every time you even look at your planer...isn't for me. I like to tie off a bag and toss in in the dumpster. The DG found a new home, even though it had nice suction.

 

[Michael Kellough]

Oneida used the little hose on the Ultimate Dust Deputy a couple decades ago.

 

[onocoffee]

If you're using liner bags...as opposed to just directly into the can...that hose equalizes the pressure and keeps the liner from being sucked up into the dust collector.

EDITED TO ADD: ...or just collapsing in on itself.

With that in mind, I noticed that on the Laguna D Flux the hose connects the bottom of the barrel to the top of the cyclone. Is this the ideal position for those connections?

I put together a cyclone (Oneida Dust Deputy) for my DeWalt 735 planer and the cyclone drops into a trash can below the table top (the dust deputy is bolted to the top) but I've been getting a lot of blowout between the bottom of the top and where the trash can meets. i had been thinking it's because the blower is just crazy strong but perhaps it's because of pressure imbalance?

 

[PaulMarcel]

I have the first version of that DC from Laguna. The negative pressure hose definitely works. While you don't have to push the bag all the way in for it to work, if you just leave the bag bunched up near the top, the cyclone will pull it in. Never had an issue with it. There should be a little cage around the opening on the inside of the barrel to ensure it can suck air out without the bag simply plugging the inlet

 

[cpw]

May be lower tech, but I bet it's more functional. I had a Dust Gorilla with the pressure return hose and it was only marginally effective. I eventually gave up on the bags, which partially defeats the purpose of the dust collector. Emptying a bin...particularly a seriously undersized one that fills up every time you even look at your planer...isn't for me. I like to tie off a bag and toss in in the dumpster. The DG found a new home, even though it had nice suction.

It's super functional. I have a V-3000; and my basement can only handle the 35 gallon drum on wheels. When the 16" planer is going, I can fill that several times in pretty rapid succession. Being able to toss the bags of chips out the door is a win compared to having a messy bin to empty.

I might be able to get the 55 gallon drum if I were to get the motor in between the ceiling joists; but it is really not worth it for serviceability IMO. I've had to move the machine a couple times, and once there was a recall that involved pulling the motor and fan.

 

[jeffinsgf]

I might be able to get the 55 gallon drum if I were to get the motor in between the ceiling joists; but it is really not worth it for serviceability IMO. I've had to move the machine a couple times, and once there was a recall that involved pulling the motor and fan.

And...that 55 gallon bag of shavings is much bigger and heavier than the 35 gallon bag. I think I would have been happy with the Gorilla if it had 35 gallon capacity. 15? Not so much.

 

[onocoffee]

I have the first version of that DC from Laguna. The negative pressure hose definitely works. While you don't have to push the bag all the way in for it to work, if you just leave the bag bunched up near the top, the cyclone will pull it in. Never had an issue with it. There should be a little cage around the opening on the inside of the barrel to ensure it can suck air out without the bag simply plugging the inlet

It looks to me that the hose that's connected to the dust bin is connected to the cyclone on the other end? Is this correct?

 

[PaulMarcel]

It looks to me that the hose that's connected to the dust bin is connected to the cyclone on the other end? Is this correct?

Yes: