Dust collector "dust bombing" my shop

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Forum topic by BigJohn posted 07-22-2016 08:55 PM 546 views 0 times favorited 13 replies Add to Favorites Watch
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87 posts in 3335 days

07-22-2016 08:55 PM

Hello. I am mostly a hand tool guy but bought a dewalt planer and delta dust collector. Every time I turn it on the dust in the air gets so bad it looks foggy. It is so thick. Am I doing something wrong?

13 replies so far

View BigJohn's profile


87 posts in 3335 days

#1 posted 07-22-2016 08:56 PM

It is coming out of the top bag.

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157 posts in 118 days

#2 posted 07-22-2016 09:07 PM

Most probably there is a leak somewhere in the collecting bag or in the way it is attached.

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87 posts in 3335 days

#3 posted 07-22-2016 09:12 PM

I can see it coming through the bag on top.

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Jim Finn

2390 posts in 2342 days

#4 posted 07-22-2016 09:14 PM

This is exactly why I have my dust collector outside my shop.

-- "You may have your PHD but I have my GED and my DD 214"

View ki7hy's profile


431 posts in 159 days

#5 posted 07-22-2016 09:22 PM

I’m sure it’s a leak. I have I think a 20 micron bag on mine (not the greatest) and it definitely doesn’t do that. I also have a good air cleaner running usually too which clears the air fast but I don’t always remember to turn that on right away. I definitely know my DC doesn’t make clouds like that. They have inexpensive bags on Amazon to replace what you have.

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980 posts in 132 days

#6 posted 07-22-2016 09:28 PM

mines this model :
never no trouble with it


View bkseitz's profile


293 posts in 730 days

#7 posted 07-22-2016 11:00 PM

1) Check Bag to see if any rips, tears, or just a poor bag
2) Check Back seal—if its not connected well you’ll blow dust all over the place
3) Check hose connections & hose(s) for poor seal or leaks
4) Check for obstructions that may cause the vacuum to be diminished so you planner is pushing dust where it can. If its the DW735 it blows chips and dust faster than many blowers can accommodate which means you may have to come up with another means to collect the dust

-- bkseitz, Washington "if everything is going well, you've obviously overlooked something"

View DirtyMike's profile


383 posts in 322 days

#8 posted 07-23-2016 01:20 AM

do you have any kind of tape to seal all the connections? hopefully not foil tape.

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Rick M.

7699 posts in 1800 days

#9 posted 07-23-2016 03:47 AM

Are you sure the dust is come out of the bag and isn’t just sitting on the bag? My AP400 with 30 micron bag would snap upright and any dust collected on the outside would get sent airborne but I never noticed any come through the bag. I replaced the bag with a 1 micron that passes more air and doesn’t snap to attention.


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1819 posts in 1408 days

#10 posted 07-23-2016 11:41 AM

A 30 micron bag is more a chip collector and less a dust collector. I would buy a better bag for your health.

View becikeja's profile


617 posts in 2233 days

#11 posted 07-23-2016 12:38 PM

I had the same problem. Ended up hanging an old moving blanket around the bag. Works perfect and doesn’t impact my air flow. Going to a 1 micron bag would be the best option.

-- Don't outsmart your common sense

View Kelly's profile


1048 posts in 2364 days

#12 posted 07-23-2016 09:18 PM

I have three collectors. The four bag Jet got modified by swapping the bottom bags for plastic bags. A small hole in one dusts the shop well. I also swapped the top. Originally, it had something in the area of ten micron bags. I couldn’t see what they allowed in the air, but, over time, the dust in the immediate area would build and the bags always had a good layer on them. After swapping to one micron bags, there was a HUGE improvement.

Even before I installed foam (the type you use to mount pickup campers) around where each bag attached to the collector and though you could see the dust trails, it wasn’t nearly as bad as what the original bags, or a hole in a bag did.

My horse and a half Jet has a canister and doesn’t pose any problem, unless I puncture the bottom bag. Then hell comes back.

I bought a Delta one horse for an experiment. It had the worst bag of the bunch. I could all but see the dust pumped in the air. Someone posted a deal on the deal forum here and I replaced that bag with a one micron. That changed the game completely too. Just for reference, I used the old bag to hold cheap bags from the big box (to contain them and protect them from being even looked at, for fear of a puncture). It became a keeper, but I sold it to my buddy and replaced it with a HF “2” horse, which I also replaced the bag on and, again, used the original bag to hold big box clear lawn bags.

In short, if you have a dust storm, it’s probably a small puncture. Even an eight of an inch will dust you out when you have a lot of fines.

View Ger21's profile


1047 posts in 2551 days

#13 posted 07-23-2016 10:04 PM

I’ve filled my HF 2HP collector about 3 times now, and even with a cheap stock bag, visible dust does not blow through the bag.
You definitely have a leak somewhere.

-- Gerry,

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