Delta 50-850 with Wynn filter and new Thien Baffle.

[dcorrick]

Back in February, I purchased a new Wynn filter for my Delta 50-850, and installed it.  I have a trash can separator in front of my Delta, and I have it plumbed into my table saw, jointer, planer, and several other devices in the shop.  I know the trash can separator is not the best, as it does not have the Thien baffle in it, but it is working, and removing most of the chips.  In November, I purchased a drum sander, and being lazy, and trying to get a Christmas project done, I hooked it to the unused port on the DC, and used it to sand quite a bit of lumber.  I noticed of late that my air flow was down, so yesterday, I pulled the filter out, and found it to be totally caked with fines from the sander.  I bet I pulled three gallons of fines form that filter.  I finally took it outside and blew air in from the outside in, to get all of the caked on junk out. 

I had read several posts on this forum about the 50-850, so I decided it was time to add the baffle to my setup.  The ID of the base of the DC is 19.5", and the ID of the opening is 11.5", which Phil has said was too large.  I build a cone, to drop in to the opening that reduces the OD down to 7" since Phil said 6" to 8" was best so I picked the center value, and went for it.  The cone was made of some steel material used for closing up joists for cold air return on duct work.  I purchased it last evening from Menards for about $6.  I cut out a circle, 15" OD with a 7-3/4" ID.  Then I took out a wedge 4-1/2" on the OD making sure the wedge was a true wedge, running to the center of the circles.  I then brought the edges together, and overlapped them about 5/8", and spot welded them together.  The angle of the cone on the DC is 27 degrees, and this cone matches very closely.  I used a thin coat of RTV around the 1" overlap of the fabricated cone to the DC cone, and secured it with 8 screws.  This extended the DC drop cone down 1-1/4", which is again, what Phil had recommended with the donut and tube extension.  This cone, will allow dust from the filter to slide back down into the top of the baffle, and hopefully, back in the bag when the air is turned back on. 

The distance from the bottom of the cone to the top of the baffle is 3-3/4".  I will report back when I get another project going that I use the drum sander for.  It was the drum sander that caused the problem in the first place.

[Bulldog8]

I know what you mean. It was the drum sander clogging my filter that caused me to build my first Thien baffle. It has made a world of difference. I have since then added a small 5 gallon separator for use with hand held sanders.

Steve