Shpsmith Dust Collector Tip

[curiousgeorge]

[quote="navycop"]I seen these posted in other forums: The bigger hood would do better. Also you are not suppose to wash them. The "cake" on dust is what makes it draw in the dust. ]
I hate to disagree with you but the "cake" doesn't increase the "draw". It does, however, help to increase the filtration capacity (smaller microns). What helps to increase the "draw" is having another port open to increase air intake. What you look for in a DC is CFM or air flow for it to work efficiently.

[fjimp]

I hate to disagree with you but the "cake" doesn't increase the "draw". It does, however, help to increase the filtration capacity (smaller microns). What helps to increase the "draw" is having another port open to increase air intake. What you look for in a DC is CFM or air flow for it to work efficiently.

Good advise George, that is exactly the way I see it. May I add that when one finishes making sawdust it is wise to leave the DC3300 on for about 15 minutes with all ports open (no hoses or caps). This will do a great job of cleansing the air in your shop. This practice also make you popular with the one who feeds you. fjimp

[tryinhard]

I agree that if you open a second port, the total air flow increases--I can see the hood pop up tighter and hear the difference. But, this is only changing the air flow into the collector. It does not increase the air flowing in the hose attached to the tool. PTWFE states that with one hose you get 107 CFM, two hoses you get 100 CFM in each hose, and with three hoses you get 95 CFM in each hose. So running with a second port open does pull on shop surroundings to help clear the air, but it does not improve the dust collection at the tool (actually, reduces it slightly).