Brad Townsend
03-09-2006, 6:08 PM
I posted the other day asking for suggestions for motorizing an internal flapper for the Wynn filter on the venerable Harbor Freight DC. In the course of that thread, several expressed interest in seeing the beater that I built. There is not much original about this. Others have posted similar that I have copied. This is just my take on it.
Materials used: 1/2" threaded rod, 3/4" square aluminum tubing, 1 Rubbermaid 8 gallon waste basket (plastic flapper material), hard maple (cut into 2x10x1/4" strips, 1 piece of 1" wide x 3' long x 1/8" thick galvanized, 10x24 bolts & stopnuts, 1/2" nuts-stopnuts-lockwashers.
http://img.photobucket.com/albums/v238/btownsend/fa0f2e72.jpg
Each of the two flapper assemblies was 10" high x14" wide, making the total 20"x14". Fourteen inches was just enough to engage the pleats without putting undo stress on them. PLEASE NOTE THAT THIS IS FOR THE SPUNBOND POLYESTER FILTER. If you are using the paper one, a somewhat less aggressive design would be advisable.
I drilled 3/16 holes through the aluminum arms and the rod and put a 10-24 bolt through it to secure it. I also threaded nuts and lock washers on the rod on both sides of each arm to stabilize them even more. The last part may have been overkill, but they sure are solid!
http://img.photobucket.com/albums/v238/btownsend/97de2eaa.jpg
The wood/plasic flappers are secured to the arms by 10-24 bolts and stopnuts. The plastic came from the sides of the waste basket and had a gentle curve molded into them. After I cut the plastic, I smoothed off the sharp edges and rounded off the corners to go easier on the filter pleats. The beaters are meant to rotate WITH the slight curve of the plastic.
http://img.photobucket.com/albums/v238/btownsend/bb5b1463.jpg
Installed in the filter. One piece of steel strapping probably would have been enough.
http://img.photobucket.com/albums/v238/btownsend/DSCN0673.jpg
The last picture shows my modification for attaching the filter. Simply drilled four holes in the ring and used bungee cords. No more taking the bottom bag off and standing on my head fooling with those goofy turnbuckles.:D Thanks for looking.
Materials used: 1/2" threaded rod, 3/4" square aluminum tubing, 1 Rubbermaid 8 gallon waste basket (plastic flapper material), hard maple (cut into 2x10x1/4" strips, 1 piece of 1" wide x 3' long x 1/8" thick galvanized, 10x24 bolts & stopnuts, 1/2" nuts-stopnuts-lockwashers.
http://img.photobucket.com/albums/v238/btownsend/fa0f2e72.jpg
Each of the two flapper assemblies was 10" high x14" wide, making the total 20"x14". Fourteen inches was just enough to engage the pleats without putting undo stress on them. PLEASE NOTE THAT THIS IS FOR THE SPUNBOND POLYESTER FILTER. If you are using the paper one, a somewhat less aggressive design would be advisable.
I drilled 3/16 holes through the aluminum arms and the rod and put a 10-24 bolt through it to secure it. I also threaded nuts and lock washers on the rod on both sides of each arm to stabilize them even more. The last part may have been overkill, but they sure are solid!
http://img.photobucket.com/albums/v238/btownsend/97de2eaa.jpg
The wood/plasic flappers are secured to the arms by 10-24 bolts and stopnuts. The plastic came from the sides of the waste basket and had a gentle curve molded into them. After I cut the plastic, I smoothed off the sharp edges and rounded off the corners to go easier on the filter pleats. The beaters are meant to rotate WITH the slight curve of the plastic.
http://img.photobucket.com/albums/v238/btownsend/bb5b1463.jpg
Installed in the filter. One piece of steel strapping probably would have been enough.
http://img.photobucket.com/albums/v238/btownsend/DSCN0673.jpg
The last picture shows my modification for attaching the filter. Simply drilled four holes in the ring and used bungee cords. No more taking the bottom bag off and standing on my head fooling with those goofy turnbuckles.:D Thanks for looking.