Anybody using Oneida's "Bag Gripper"?

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Forum topic by BlankMan posted 11-12-2009 10:23 PM 2706 views 0 times favorited 4 replies Add to Favorites Watch
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1490 posts in 3379 days

11-12-2009 10:23 PM

I always kind of wanted to use a plastic bag for easy emptying in my dust barrel and I came across this a while ago. I’m thinking of making one, I have a spare vacuum pump laying around, but before I invest the time I’d like to know if it works well. gripper web page.pdf

-- -Curt, Milwaukee, WI

4 replies so far

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1490 posts in 3379 days

#1 posted 11-13-2009 12:05 AM

Shoot. Didn’t see the spaces in the URL, this should work:

I believe spaces are illegal characters in URL’s, but people still do it.

-- -Curt, Milwaukee, WI

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131 posts in 3183 days

#2 posted 11-13-2009 01:12 AM

It seems to me that you could simply put a hole in the bottom of the barrel (with maybe a small false bottom with holes) and evacuate it with a shop vacuum. Once the bag is settled into the barrel, there’s no reason to have additional vacuum if you plug the hole used to evacuate. The illustration on the link looks like there’s a pourus stone at the bottom. These are used in fluidized bed coating systems and are really nothing different than a grindstone with the center hole plugged. But, think of putting a piece of pegboard a couple of inches above the barrel botton and attaching a vacuum device (shop vac) below this.

I have a Oneida 1.5 hp system and usually wait until the barrel is full because it is such a paine to empty. I’ve got to seriously think about this concept.

-- Tom, New London, NH

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1490 posts in 3379 days

#3 posted 11-13-2009 08:17 AM

Good idea, I see what you’re thinking, once the air is sucked out and the bag conforms the vacuum created by the cyclone on the inner side of the bag would have to overcome the vacuum then created between the outer side of the bag and the inner surface of the drum. Does sound plausible. But relies on the bag sealing good between the cover and the drum. And I would think the vacuum would dissipate and have to be redone periodically, I would also think that the fiber the drum is made out of has some amount of porosity, but coat of poly would probably solve that. If it held a few days that might be ok. But I still would consider using a vacuum pump and not a shop vac just to get the higher vacuum.

Something to consider, but you got me thinking. I was concerned that you’d have to start the vacuum pump and wait for it each time to draw the vacuum out of the drum before starting the cyclone but it should still be there somewhat between use and be good enough to start both at the same time once the initial vacuum was done.

It also got me to thinking that it could be done maybe a little less complicated and I like the idea of the connection hole in the bottom, have to raise the drum a bit, I probably only have 4ish inches to work with but could raise it 2 inches.

I’ve got the 1-1/2HP Oneida too, it had the internal filter but I recently removed it and went with the external filter retro kit. It made a significant improvement in airflow. And yes, emptying the thing can be a bit messy and why I’m considering this, the plastic bag would help big time.

-- -Curt, Milwaukee, WI

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#4 posted 03-16-2010 03:39 PM

Hi Blankman,
Did you ever do this project? I’m thinking of doing the same thing, was wondering how you made out. Also, do you think it would be possible to tap into the intake duct for vacuum instead of using a vacuum pump?


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