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Joseph Connors
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Default 4" vs 6" ducting for effective dust collecting


As far as your father is concerned, a number of factors are in play
here. Perhaps he did not a predisposition to an allergy or lung problem.
Lung problems run in my family. Another point is in the past there was a
lot less sanding done, especially by machine. They tended to plane and
scrape much more so the shop environment was healthier.

As far spending the money goes, everyone makes that decision for
themselves as to their priorities in life. Its a personal choice to
gamble that it won't happen to you.

Another factor, Bob, is the shop itself. If your shop is open to the
air, then air quality is less of a concern. These bags collectors with
small 4" pipe are dust pumps, pure and simple. When you watch them
inflate with sunlight in back of them, you can see the cloud of dust

As far as I'm concerned, you need a large blower with 6" pipe and very
good (.5 micron - certified) filtration.

Bob G. wrote:
On Sun, 22 Jan 2006 19:23:38 -0800, Joseph Connors

I converted from 4" to 6" after reading Bill's site. The flow is much
better, though I will need to convert to a cyclone in the near future.

To me, cost is irrelevant. We spend $1000's of dollars on our tools to
make this dust, that if we don't collect right at the source as soon as
it is generated, will end up in our lungs causing us untold health
problems. I say, spend a $1000 or so, forgo the upgrade on that tablesaw
or jointer, and ensure that we can continue woodworking for years to
come. Anything else seems like false economy to me!

Well I tend to agree that 6 inches is much better (mine is 4)..BUT
honestly what did woodworkers like my father loose by spending years
in their shops without any DC's....? My Dad passed away in 2002 at
the age of 87.

I have had my DC system for at least 10 years most likely more BUT to
be truthful I never installed it for health reasons... NOPE..*I just
happen to like relaxing and working in a clean shop.. I retired
almost 8 years ago and have spent at least 3-4 hours in the shop every
day since ... a lot less then that when I was working naturally...

I'm sorry...but spending 1000's of dollars on DC systems for health
reasons to me is not really worth the effort BUT spending that same
amoput of money to increase your enjoyment of life (like a clean shop)
PLUS a more healthful envioroment IS WORTH IT

Will I change over to 6 in runs...??? Ya know I most likely will
BUT only because it would be an interesting project...

Bob G.

Joseph Connors
The New Golden Rule:
Those with the gold, make the rules!