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Forum topic by Dusty56 posted 10-17-2009 05:11 PM 912 views 0 times favorited 9 replies Add to Favorites Watch
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Dusty56

11659 posts in 2344 days


10-17-2009 05:11 PM

I recieved this via an email from Eagle Router bits.
http://blog.eagleamerica.com/2009/10/12/demo-air-net-filter-the-air-in-your-workshop-for-less/

what are your thoughts ?

-- I'm absolutely positive that I couldn't be more uncertain!


9 replies so far

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patron

13034 posts in 1997 days


#1 posted 10-17-2009 05:20 PM

looks like a good idea ,
but for $189.00 ,
i think i’ll stick with a pillow case !

-- david - only thru kindness can this world be whole . If we don't succeed we run the risk of failure. Dan Quayle

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papadan

1153 posts in 2024 days


#2 posted 10-17-2009 05:51 PM

I’m with you Patron, those prices are high for a cloth bag.

-- Carpenter assembles with hands, Designer builds with brains, Artist creates with heart!

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a1Jim

112096 posts in 2233 days


#3 posted 10-17-2009 06:07 PM

It might work but I’ve always felt like you want to collect dust before it’s airborne/

-- http://artisticwoodstudio.com Custom furniture

View jack1's profile

jack1

1924 posts in 2683 days


#4 posted 10-17-2009 06:13 PM

In a small area, or at a small tool it’s probably ok. I wonder too about letting it get airborne. Also a little pricey.

-- jack -- ...measure once, curse twice!

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Chris Wright

529 posts in 2137 days


#5 posted 10-17-2009 06:20 PM

Pretty ingenious if you ask me, but I agree, kinda pricey.

-- "At its best, life is completely unpredictable." - Christopher Walken

View Gary's profile

Gary

7247 posts in 2089 days


#6 posted 10-17-2009 08:25 PM

I agree with Jim and David. Too much money and it’s kinda like letting a fly go outside then trying to swat it.

-- Gary, DeKalb Texas only 4 miles from the mill

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ondablade

105 posts in 1854 days


#7 posted 10-17-2009 08:52 PM

The accepted principle in dust collection (especially the fine sub micron dust that is harmful) is that if it’s allowed to escape into the atmosphere it’s simply not technically feasible to recapture it and filter it out at any reasonable airflow rate.

Bill Pentz for example publishes material that suggests that it’s a matter of simple geometry. If i have it right you need at least a real 50fpm to entrain these fine particles over the entire surface of the sphere enclosing the volume of air that has become filled with the stuff.

But for example at 800cfm the radius of the sphere (if you are to get 50cfm at its surface) is only about 13 1/2 inches. Worse still there’s very few commercially supplied DIY dust systems that shift a genuine 800cfm in real world operating conditions, and that’s setting aside the question of whether or not the filter media they use can capture sub micron particles anyway.

The visible stuff you see heading into the bag is far far larger than the dangerous sub micron stuff which is more or less invisible.

Perhaps there’s a way of doing it, but i’d be fairly sceptical…

ian

-- Late awakener....

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Dusty56

11659 posts in 2344 days


#8 posted 10-18-2009 06:25 AM

My thought is this …once the interior of the bag gets a sufficient coating on it , it seems like the fan would just sort of “pressurize” the bag and the air / dust would be fighting just as hard to get out past the fan blades as the air trying to get inside…..kinda like blowing into a cup if you will…... I don’t know of any household fans with enough power to compensate for the loss of air flowing freely through them .Especially those 20” box fans that can be stopped by a slight breeze blowing outside of the window. LOL
I also have to wonder about the potential fire hazards : (

-- I'm absolutely positive that I couldn't be more uncertain!

View woodworm's profile

woodworm

14125 posts in 2246 days


#9 posted 10-18-2009 03:33 PM

I doubt it works (100%) as what it is intended to be.

-- masrol, kuala lumpur, MY.

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