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H.F. dust collector tip

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Forum topic by eflanders posted 09-09-2017 02:34 PM 389 views 0 times favorited 3 replies Add to Favorites Watch
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eflanders

219 posts in 1685 days


09-09-2017 02:34 PM

Topic tags/keywords: dust collector harbor freight

Not too long ago I was given a used H.F. dust collector. I quickly learned that the filter bag on this unit allowed very fine dust to escape through it. Rather than spend the money for a cartridge filter, I thought I would just try to “double bag” it as I had already converted my other (Delta) unit to a cartridge filter and still had the filter bag from it. Originally I was rather skeptic that this would even work thinking that it would really hurt the air flow and/or not capture anymore of the fine dust that I could easily see escaping from the lone H.F. filter bag.
Well much to my surprise and delite, it worked very well!
Now the downside is that it does cut the airflow some when the second bag gets dirty. The simple solution to this problem is to just wash the second bag clean when this happens. Now I should also note that the H.F. bag is some sort of felt-like fabric and my second bag (a Delta) is a much different type of cloth bag. It might also have a better micron filter rating than the felt bag.
Disclaimer: I do not have the ability to measure cfm loss, nor can I measure the fine dust that might be still escaping.


3 replies so far

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EricLew

188 posts in 1201 days


#1 posted 09-09-2017 04:55 PM

I also have that DC, and the issue is the bag that comes with it is only a 5 micron bag. I did the typical conversion with the Thien baffle, 30 gallon trash can and Wynn filter, and I’m very happy with it.

I guess it depends on what the micron rating on your delta bag is, I’m sure its better than the HF bag, so I’m not sure double bagging is helping you. If the Delta bag is 2 microns, (just an example) than I dont see what the HF bag is doing for you

-- I love the smell of coffee in the morning, and sawdust in the afternoon

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eflanders

219 posts in 1685 days


#2 posted 09-09-2017 08:08 PM

Eric, After seeing your post I thought I would try using the Delta bag alone to see if there was a difference between the two bags. The Delta bag alone was better than the H.F. bag. This leads me to ASSUME that the Delta bag has a better micron filtration rating. I also tried using a ( newly washed) H.F. bag over the Delta one just to see if there were any changes from my original trial. The best results were still achieved with inside bag being the H.F. bag with the Delta bag over it.

This makes me ASSUME that the H.F. bag is acting as a sort of pre-filter for the Delta bag. It will be interesting to what the long term effects are of using this combination.

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EricLew

188 posts in 1201 days


#3 posted 09-09-2017 11:04 PM

That is interesting. I’ve never read of anyone using two bags before. I was just going on the assumption that the Delta bag had to have a better micron rating, so it would catch anything the HF bag caught. That’s why I was assuming the HF bag wasn’t really adding any benefit.

-- I love the smell of coffee in the morning, and sawdust in the afternoon

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