Dust Collector ??

[JPG]

I all most hate to post this but...

If the dust has to travel at 3500 ft/min so that is doesn't drop out of the air stream then it would seem that the general dust in your shop will be at a speed far less then that and the dust should be dropping out and landing on everything in site. So how then does all this get picked up with a open port on your vac or dc?

Sometime when you have a chance bring home one of those helium balloons and take it to your shop. Let it float around then try to suck it up with a hose from 12' away, 9', 6' even 3'... now try it with your open port... how close does it need to be???

Now put the hose in the outlet of the vac if it has one. Put the balloon 12 feet away and blow on it... Notice anything different? You bet you do.

Just saying if life is giving you dust get a balloon and play with that.

Ed

There is dust, and there is debris!

We usually (incorrectly) refer to that pile of debris under the saw as sawdust.

Debris needs the velocity to stay suspended in the 'air stream'.

Dust does not.


I bet the pressure from the outlet is greater than 14.7(x2) psi and a 'concentrated stream'.

[2bits]

As JPG40504 stated, I think I (we) are addressing two seperate yet related issues. One being the "debri", chips etc. and the other being the actual fine dust.
I am searching for a solution to remove and contain as much of both as possible without creating a "lab" environment (too costly).

With limited space and electrical outlet issues, I will see what Woodcrafters has in stock for connectors/adapters. As JPG40505 also pointed out I think the plan of using too many elbows, tees, and or "Y"s would create too much "friction loss" in air flow.

I will try to find a 4" fitting to replace the three 2 1/2" ones and use as short of a section of 4" hose as needed to connect the two together.

If it will draw sufficiently enough to collect the airborn dust and debri, then I will take photos and post them for anyone that is interested. I do appreciate all the input and thoughts from everyone.

[fjimp]

I find this discussion interesting. I have tried many ideas for dust/trash collection. Today I took a different approach. I have been turning bowls the last couple of days and generated a huge pile of turnings. I had a call from a gentleman who desired some assistance which made me realize a quick cleanup was in order. I began with the dust collector and took a second look at the pile. It hit me that the large scoop shovel and a broom I would make quick work of that pile. I also realized that if I sucked it into the dust collector I would need to also take time to change the bag today. Thus a few seconds (like 10) of broom work and two huge scoops of sawdust being dumped into the plastic trash bag holding other shop trash and I had a clean shop. The dust collector bag can likley wait a couple of weeks to be emptied. True the dust collector does a great job with most projects. Frankly lathe turnings seldom seem to be sucked into the hood for the dust collector. I remember visiting a commercial cabinet shop a few years ago. They had 4" hoses collecting dust and had as big a mess as I have ever had with the DC33000 I use. I have learned that although the 2 1/2" hoses are fine if single or at most two hoses in tandem. More than that is a waste of time. Elbows seldom stay together and seem to inhibit dust collection. My DC3300 is literally located in the center of the shop with the tools surrounding it. My Jet air filtration system is just east of the dust collector also near the center of the shop mounted up against the 8 1/2' ceiling. Good luck finding the best solution. Jim