Went to the IWF. Pretty impressive.
Bought a 1 mil dust collector bag for my 2HP 1200CFM dust collector.
Its twice as tall as the original one, about 5-6 feet and 24 inch vs
20. Didnt have a strap so I used bungie corg to hold it on. Turned it
on and it just laid there in a pile. Fluffed it up a little, still no
inflation. Finally ran a cord over a rafter and hoisted it up. Looks
impressive and there is almost no internal pressure on the bag. The
old one was sooo tight and had little dust leaks. 80 bucks, should
have done this sooner.
Jack
Jack wrote:>Bought a 1 mil dust collector bag for my 2HP 1200CFM dust
collector.
>Its twice as tall as the original one, about 5-6 feet and 24 inch vs
>20. Didnt have a strap so I used bungie corg to hold it on. Turned it
>on and it just laid there in a pile. Fluffed it up a little, still no
>inflation. Finally ran a cord over a rafter and hoisted it up. Looks
>impressive and there is almost no internal pressure on the bag. The
>old one was sooo tight and had little dust leaks. 80 bucks, should
>have done this sooner.
>Jack
>
Shouldn't there be internal pressure on the bag? Tom
Work at your leisure!
<< Looks
impressive and there is almost no internal pressure on the bag. The
old one was sooo tight and had little dust leaks. 80 bucks, should
have done this sooner. >><BR><BR>
Something is wrong. The bag should indeed inflate. You are pumping probably 450
cfm into it after all (I say that as I assume you are using 4" hose. Close to
doouble that for 6"--you don't really get 1200 moved without 7or 8" piping.
Anyway, you said you were using a bungee cord. If you don't have a strap clamp
that big, get a couple of smaller clamps, and piggy back them together (it
works with those quick adjuist clamps places like Woodworkers Cupply sells),
and tighten in around the new bag. If it does not inflate after that, then
check the whole collector. The bigger bag gives you more filter area, it does
not reduce the pressure out, not on a collector as big as yours.
Constant confusion over the two methods of capture. If you think in terms
of mesh alone, like sand through a sieve, you understand one method of
trapping larger and then small particles. If you think of sand in a
sluice, where intermediate barriers cause turbulence and settling, you have
another. The felt bags offer so many opportunities for the trapping of
particles and the exit of air that they are not turgid until fairly well
loaded, and don't unload as fully as a thin bag when merely shaken.
"Tom" <[email protected]> wrote in message
news:[email protected]...
> Jack wrote:>Bought a 1 mil dust collector bag for my 2HP 1200CFM dust
> collector.
> >Its twice as tall as the original one, about 5-6 feet and 24 inch vs
> >20. Didnt have a strap so I used bungie corg to hold it on. Turned it
> >on and it just laid there in a pile. Fluffed it up a little, still no
> >inflation. Finally ran a cord over a rafter and hoisted it up. Looks
> >impressive and there is almost no internal pressure on the bag. The
> >old one was sooo tight and had little dust leaks. 80 bucks, should
> >have done this sooner.
> >Jack
> >
> Shouldn't there be internal pressure on the bag? Tom
> Work at your leisure!
Do not do this. It's force/unit of area and weight that count, and
resistance to flow. Daryl is in error.
"DarylRos" <[email protected]> wrote in message
news:[email protected]...
>If it does not inflate after that, then
> check the whole collector. The bigger bag gives you more filter area, it
does
> not reduce the pressure out, not on a collector as big as yours.
[email protected] (jack) wrote in message news:<[email protected]>...
> Went to the IWF. Pretty impressive.
> Bought a 1 mil dust collector bag for my 2HP 1200CFM dust collector.
> Its twice as tall as the original one, about 5-6 feet and 24 inch vs
> 20. Didnt have a strap so I used bungie corg to hold it on. Turned it
> on and it just laid there in a pile. Fluffed it up a little, still no
> inflation. Finally ran a cord over a rafter and hoisted it up. Looks
> impressive and there is almost no internal pressure on the bag. The
> old one was sooo tight and had little dust leaks. 80 bucks, should
> have done this sooner.
> Jack
I think the felt bag is just that much less resistant to the air flow,
plus more than double the surface area. I can tell the suction is much
greater also. Per Steve I cranked up the drum sander and the bandsaw
to see how well they did. Much better. I think a wide belt would be a
better test, maybe I should get one.
Oh well time clogs all
Jack
Did you have a blast gate open? No flow, no blow.
--
********
Bill Pounds
http://www.billpounds.com
"jack" <[email protected]> wrote in message
news:[email protected]...
> Turned it
> on and it just laid there in a pile. Fluffed it up a little, still no
> inflation. Finally ran a cord over a rafter and hoisted it up. Looks
> impressive and there is almost no internal pressure on the bag. The
> old one was sooo tight and had little dust leaks. 80 bucks, should
> have done this sooner.
> Jack
"DarylRos" <[email protected]> wrote in message
news:[email protected]...
> << Looks
> impressive and there is almost no internal pressure on the bag. The
> old one was sooo tight and had little dust leaks. 80 bucks, should
> have done this sooner. >><BR><BR>
>
> Something is wrong. The bag should indeed inflate. You are pumping
> probably 450
> cfm into it after all (I say that as I assume you are using 4" hose. Close
> to
> doouble that for 6"--you don't really get 1200 moved without 7or 8"
> piping.
> Anyway, you said you were using a bungee cord. If you don't have a strap
> clamp
> that big, get a couple of smaller clamps, and piggy back them together (it
> works with those quick adjuist clamps places like Woodworkers Cupply
> sells),
> and tighten in around the new bag. If it does not inflate after that, then
> check the whole collector. The bigger bag gives you more filter area, it
> does
> not reduce the pressure out, not on a collector as big as yours.
Greater minds than mine know more about this, but it seems that higher
quality 1 micron or smaller felt bags have less resistance than the 30
micron bags, hence less inflation tightness. Try blowing air INTO each with
your breath and you'll notice the difference. I seems that although the
holes are smaller, there's a heck of a lot more of them.
How's that for a non-technical explanation?
Gary
O
Fluffed it up a little, still no
>inflation. Finally ran a cord over a rafter and hoisted it up. Looks
>impressive and there is almost no internal pressure on the bag. The
>old one was sooo tight and had little dust leaks. 80 bucks, should
>have done this sooner.
that won't last long once you start using it though.
--
Knight-Toolworks & Custom Planes
Custom made wooden planes at reasonable prices
See http://www.knight-toolworks.com For prices and ordering instructions.
On 31 Aug 2004 14:49:55 GMT, [email protected] (DarylRos) wrote:
>Something is wrong. The bag should indeed inflate. You are pumping probably 450
>cfm into it after all (I say that as I assume you are using 4" hose.
no that's the way it works till you get a dust cake in it. then it will inflate
till it is tight. right now the airflow is that good.
--
Knight-Toolworks & Custom Planes
Custom made wooden planes at reasonable prices
See http://www.knight-toolworks.com For prices and ordering instructions.