Square inches to square feet: 21.64 / 144 =. V = Volume of air moved in cubic feet per minute (CFM)Īrea of a circle: πr²There are 144 square inches in a square foot. The formula: A * S = VA = Area of the opening in square feet I walk through all the steps in the video, but below is how I did the math to come up with each calculation. The bottom line is the cyclone is the most efficient. So I bought an anemometer and decided to find out for myself. Then I received an Oneida Super Dust Deputy as a gift and I realized I had the opportunity to generate the information I could not find and share it a side by side comparison of a Thien baffle and cyclone. The only information I could find was that just a chip collection lid is definitely the worst of the three, but still an improvement over a single stage.įor cost reasons, I decided to make a Thien baffle because I could do that with material I had on hand. and this is a new area of research for me so I did not trust my gut. My intuition thought that a molded cyclone would be the most efficient, but they contain a lot more volume than a Thien baffle. Blowing some fine dust out of my roof is okay, blowing every particle my dust collector picks up would not be.īut, what I could not find is a side by side comparison of each solution to figure out which is the most efficient. Or it allows you to exhaust directly outside like I do and bypass a filter entirely. Also, your filter lasts a lot longer because most of the trips and a majority of the dust are separated before they reach the filter. That loud "clunk" when a chip hits your expensive impeller does not feel good. Your motor lasts longer because everything being collector does not pass through the collector. Why go to a two stage system if it reduces your airflow? A few reasons. One of the things I learned during my research is that all of these techniques reduce the airflow of your dust collector because they introduced a lot of extra air resistance. This does not have the issues of just a chip separator lid, but is a lot more complicated to build than a Thien baffle, and fairly expensive to buy aftermarket. This is similar to the first option, but includes a bottom layer that separates the cyclone effect from the collected dust, preventing it from getting trapped and then sucked back out.īuy or make an after market cyclone.
The problem here is that the cyclone created inside the bucket keeps the dust stirred up so a lot of dust that goes into the bucket ends up being sucked back out. A few months ago when I decided to convert my single stage Harbor Freight dust collector into a two stage system I discovered there were three basic approaches:īuy or make a lid to go on top of a bucket for chip separation.
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