Replies

1. 
   mbiker1999 | May 07, 2002 02:39am | #1

   Here is the bag I ordered.  It's supposed to filter to 1 micron should increase the performance of your dust collector.  I just bought an Delta 850 myself and finished piping it up this weekend.  I haven't got the bag yet but it's the same company that made them for Wood Magazine's dust collector review.  The bag really looked like it enhance the performance quite a bit.  I had borrowed the mag from a friend and I don't have it to give you the website, but I'll include a phone number and email address so you can get in touch with them if your interested.

   The email addr is [email protected].  If I find the URL i'll post it as well.  Good Luck

   Here is the email i got from them

   For your top bag we would recommend using a 10oz polyester felt material.

   This material filters down to 1 micron. We would recommend making the bag

   48" long X 36" diameter tapered down to 20" in diameter. We would put a

   circular closure at the top of the bag with 4 hanging loops around the edge

   of the bag. The CFM on this bag would be 2400 and the cost of the bag is

   $84.84.

   For your bottom bag, you can use a heavy plastic bag to line your new bag.

   We have 5 mill clear plastic bags which cost $1.50 each. If you would like

   us to make you a new bottom bag, we would make it out of #8 cotton duck.

   This canvas-like material will keep the dust from escaping out of the bag.

   The cost of this bag would be $77.95.

   If you need additional information, please give me a call at 1-800-367-3591

   or e-mail me. Thanks.

   Sandy Presson

1. 
   Frede1962 | May 07, 2002 05:46am | #2

   Bill:

   Thanks for the reply.  I also read that article in Wood Mag, and I also contacted AFFCO (great minds think alike).  I got the bag price, but Tim from AFFCO recomended a 12oz. top and a #8 bottom bag to me.  I'm not sure what #8 means.  I was all set to order, but then I read the book "Controling Dust in the Workshop" by Rick Peters.  Rick says when replacing filters divide the CFM of the collector by 10 to determine the total cloth needed in square feet.  You should use a 10:1 air to cloth ratio.  He goes on to say "stay away from the cheaper 8 or10 ounce felt bags and use only 16 oz felt" and to "ask for the scientific data to back their claims on micron ratings."  He also says again and again "after all this is your lungs we are talking about."  ...scares the heck out of me.  

   I think I am going to call AFFCO an run these numbers by them.  I have tried to find another scorce but it looks like AFFCO is about it.

   Please let me know how you make out with your setup.  Are you using PVC?   ...PVC that's another issue that I'm back and forth on.  I just read an article that bebunks the dust explosion issue with PVC, so I may use it because it's so cheap and strong.

   Thanks again,

   Fred 

1. 
   BillHg | May 07, 2002 09:04am | #3

   For what it's worth... just read your posts and was reminded of a website I found interesting, perhaps you will as well.  The outfit is Oneida and they make dust collection equipment as well as bags for other brands of dust collectors.  I'm interested in your findings as my home shop is long overdue for a dust collector.  For their site try http://www.oneida-air.com.  -Bill

1. 
   Frede1962 | May 09, 2002 01:14am | #4

   Thanks.  They have a great site.  I have sent them a request for 1 micron bags.

   Fred  

2. 
   mbiker1999 | May 11, 2002 04:44pm | #5

   Yup I am using PVC as the main piping and then flx hose to attach the machines.  I'm using sewer and drain pipe, (thin walled PVC), that costs about $2.50 or so for a 10' section.  The elbows and wyes are also very cheap.  A friend of mine has used the same setup with good success.  The only issue is that you will need to fudge around with the connections to the blast gates and depending on the flex hose you get you could have a time connecting it up to the PVC.  I used the flex hose that Penn State is selling.  I got 50' for $40.  It's diameter is large enough to fit over the PVC, so all you need to do is clamp it.  The flex hose is like a heavy duty dryer hose.  It seems pretty sturdy but I'm a little concerned on how it will hold up over time.

   For the blast gates, I knotched the end of the PVC pipe on my band say and wrapped duct tape around the blast gate.  Some duct tape on the PVC and a clamp and you'll get a nice tight connection.  Imagine that, I'm actually using duct tape for duct work!!!  Amazing!!!

   I am a little concerned about static electricity.  I'm mulling over the idea of grounding all the plastic.  I'll probably end up doing that.  Better safe than sorry.  I haven't got my bag yet.  Hopefully it will arrive next week.

   Good luck!

   Bill

1. 
   JVeillon | May 12, 2002 06:15am | #6

   I lost the web site for Penn State, do you know it?

   Thanks

   John

1. 
   mbiker1999 | May 12, 2002 08:01am | #7

   Yup I got it.  Here ya go;

   http://www.pennstateind.com/dusthose.html

   I also bought all the blast gates, hoods etc from these guys.  They had the best selection and the prices were pretty good.

   Good Luck!

   Bill

2. 
   JVeillon | May 12, 2002 03:08pm | #8

   About 6 or 7 years ago I bought their panel cutting system and it has been the best $90 I ever spent.   I didn't buy their router adapter and I should have.

   ThanksJohn

2. 
   Mbiker | May 20, 2002 07:55pm | #9

   Just got my dust bag from CFF a few days ago.  It's bigger than I thought it was going to be.  What really surprised me was the improvement it made in the performance of the dust collector.  I can't measure it but there is a noticable increase in the airflow from the stock 30mic bags.  I bought some 3mil contractors bags from Home Depot for a liner for the bottom bag, (it's the original that came with the collector).  What a sweet setup. 

   from the standpoint of the increased performance and the fact that I'm filtering out ~1mic particles, the $84 for the bag seems worth it.

2. 
   PlaneWood | May 20, 2002 08:55pm | #10

   Someone tell me - what is the scientific principle that lets a bag with small holes be more efficient at allowing air to be moved than bags with big holes?   I have seen claims that you get more air movement with 1 micron bags, but how is this accomplished????

   And another question - what is the min, max, and median sizes of the dust particles when your using say, 220 grit sandpaper on Oak??  150 grit??  Has a study ever been done on this??

   PlaneWood by Mike_in_Katy
   PlaneWood

1. 
   sschefer | May 20, 2002 09:06pm | #11

   Mike, I believe that with the smaller holes spaced closer together the actual air flow volume is increased. An example might be the ability to get four 1 micron holes in the same space required for one 3 micron hole. Steve - in Northern California

1. 
   mbiker1999 | May 21, 2002 02:40pm | #12

   Steve you hit the nail right on the head!  That's exactly it.  The 1 mic bags actually have more airflow than the 30mic bags.  Add on top of that the oversized bag I got from CFF, (it's rated at 2400 CFM), and the collector hast to run better, and does.

   As for the particle size of dust created by sandpaper, I know it's smaller than 30microns.  If it's down to 1mic i don't know but we're talking about our lungs here so I got a bag with the best filtration i could find.

   -Bill