![]() Square inches to square feet: 17.72 / 144 =. 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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