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  1. #1
    ********* Returning Member clowman's Avatar
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    Clay Lowman (42)
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    Dust collection filter bags.

    Wondering if this would be the correct forum... Oh well, I hope so.

    How often should you change the filter bags ( the top bag ) on dust collectors? Also.. is there anything you need to do as far as maintenance on them? ie.. take them off every now and then and "beat" them off? I have noticed a decrease in "suckage" recently, and wondering if it's time. I have a grizzly 1029z DC.
    -Clay


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    Returning Member sediener's Avatar
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    Re: Dust collection filter bags.

    I'm pretty sure you can just throw them in the wash. A pre-beating can't hurt though.

    - Steve

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    Re: Dust collection filter bags.

    Quote Originally Posted by clowman View Post
    Wondering if this would be the correct forum... Oh well, I hope so.
    ...we're all in trouble when the senior moderator doesn't know where to post :lol::lol::lol::lol:
    Antiques made, while you wait...

  4. #4
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    Re: Dust collection filter bags.

    Filter bags- ugh! Get a cyclone!

    Sorry, now that I've got that out of my system. Before we knew about the dangers of fine dust to the lungs, filter bags were used on all DC's mainly to trap wood chips (and let air pass)- to help keep a shop "cleaner." They are a strange, no win device- they actually work better* when caked with dust . . . up to a point, then when they get too caked, suction suffers. *They do a better job filtering fine dust when already caked with dust. So the bottom line is you need to decide when you have lost too much suction.

    Conventional wisdom is that for safety sake and to protect your lungs, it is best to get as much dust at the source- at the machine. That means maximum DC volume and velocity. On the other hand, while they stop chips and large dust particles, typical filter bags (depending on micron rating) will actually let pass a lot of fine, most dangerous and unhealthy dust, when they are clean. You need to think about why you have a DC - for a clean shop or a clean and healthy shop. Bill Pentz's web site has some extensive discussions of all this on his site.

    As far as your question, the only other factor, is what washing will do to the fabric weave and filtering ability. I frankly don't know.

    Now, without spending money on a cyclone and a cartridge filter (which filter MUCH, MUCH better than fabric bags) a solution is to put the DC outside where escaping fine dust won't affect your lungs, then keep the bags clean.

  5. #5
    toolferone
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    Re: Dust collection filter bags.

    I have always been told to NEVER WASH the filter bags. Alan is right in that they need some dust in them to work. All I would do is beat it like you are cleaning a rug.

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    Re: Dust collection filter bags.

    The best thing I ever did for my collector (I have the infamous HF one) is replace the bags with a cartridge setup from here:

    http://www.wynnenv.com/35A_series_cartridge_kit.htm

    I know there are lots of more efficient systems out there but for $91 it was a HUGE improvement.

  7. #7
    McRabbet
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    Re: Dust collection filter bags.

    Clay,

    I must agree with Jonz on his recommendation to replace the bag with a cartridge filter and the Wynn Environmental conversion is the way to go. I also agree with Alan that a cyclone is the best solution -- I just bought a CV1800 ClearVue Cyclone and will get it delivered in early November. I have a bag-equipped Penn State Industries DC unit in my crawl space and when I empty the lower collection bag, I first beat the sides of the upper "filter" bag with a flat stick to free up any caked-on fine dust. I always wear a mask when doing it, because I can see the fine dust coming off the outside of the bag.

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    Re: Dust collection filter bags.

    When DC stops sucking good, normally time to empty bottom bag. Normally if you have an obstruction in the lines, there is a noise associated with that. Youíll know it when you hear it!

    Wonít hurt to smack the top bag, couple time and let dust settle in bottom bag before removing just the bottom bag. So guess just emptying the bottom bag should get you good to go!

    Also have HFDC with Wynn $135 Cartridge Kit set up. Those poly bags a PITA to get on but, work great. Also bought the 10 pack of 4 mil poly bags. Cheapest source for poly bags could find. I slap the canister several times, let dust settle then remove bottom bag. Will also take the shop vac to inside of canister before putting on new bag if not in a hurry or remember too. Pretty easy op!

  9. #9
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    Re: Dust collection filter bags.

    Quote Originally Posted by Jonz View Post
    The best thing I ever did for my collector (I have the infamous HF one) is replace the bags with a cartridge setup from here:

    http://www.wynnenv.com/35A_series_cartridge_kit.htm

    I know there are lots of more efficient systems out there but for $91 it was a HUGE improvement.
    Chris,

    Thanks for the info, I've been looking for a better solution for my Griz 1029. This should help until I can, hopefully, one day buy a cyclone.

    Once again, thanks for the web site.

    Jimmy:-)
    Jimmy

    "Twenty years from now you will be more disappointed by the things that you didn't do than by the ones you did" - Mark Twain

    " Does history record any case in which the majority was right ?" - Robert Heinlein

  10. #10
    ********* Returning Member clowman's Avatar
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    Clay Lowman (42)
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    Re: Dust collection filter bags.

    Wow.. Once again, I have not been disappointed. You guys are great. I do wish I had a cyclone. I think I'll look into one of those cartridges.
    -Clay


  11. #11
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    Re: Dust collection filter bags.

    A real cyclone is best of course. But, a trash can separator will go a long way keeping the bag on your DC empty, much easier to empty the trash can than taking off and putting on a new bag. See http://www.ncwoodworker.net/forums/s...ad.php?t=10866 :-)

    Bas.

  12. #12
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    Re: Dust collection filter bags.

    Yeah you'll be taking my name in vain by the time you get that bottom poly bag on. :lol: I'm telling you now, save your sanity and get an extra pair of hands when you put it on.

    I'm thinking of adding a trashcan separator as well. Main reason, I won't have to take THAT BAG off as often.

  13. #13
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    Re: Dust collection filter bags.

    Quote Originally Posted by Wildwood View Post
    When DC stops sucking good, normally time to empty bottom bag. Normally if you have an obstruction in the lines, there is a noise associated with that. Youíll know it when you hear it!

    Wonít hurt to smack the top bag, couple time and let dust settle in bottom bag before removing just the bottom bag. So guess just emptying the bottom bag should get you good to go!

    Also have HFDC with Wynn $135 Cartridge Kit set up. Those poly bags a PITA to get on but, work great. Also bought the 10 pack of 4 mil poly bags. Cheapest source for poly bags could find. I slap the canister several times, let dust settle then remove bottom bag. Will also take the shop vac to inside of canister before putting on new bag if not in a hurry or remember too. Pretty easy op!
    Wildwood,
    Another good way to clean a pleated type filters is to take a quarter pad electric sander ( with no paper on it) and run it on top of the filter for a minute or so, shaking most of the dust into the bag. I got this hint from one of the magazines and thought to pass it on.

    Jimmy:-)
    Jimmy

    "Twenty years from now you will be more disappointed by the things that you didn't do than by the ones you did" - Mark Twain

    " Does history record any case in which the majority was right ?" - Robert Heinlein

  14. #14
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    Re: Dust collection filter bags.

    Twodognc, thanks for the info will definitely give it a try!

  15. #15
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    Re: Dust collection filter bags.

    I think whatever you do you will still breath dust. I don't think the average hobby shop dust collection system will keep you air clean. I use a dust collector because without one the chips from my machines would make a huge mess. The machines are not designed to allow you to capture all the fine dust. No matter how hard you suck or what you suck with, fine dust will always escape collection. If your really concerned about breathing fine dust you should wear a respirator mask.

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