Here are instructions for making a round to rectangular Duct Evolution.
I downloaded these instructions from the following Web Site:
http://joe.emenaker.com/DuctEvolution/index.html
I used joe's EXCEL and PDF instructions to create a drawing file using "DoubleCAD XT" which is a very good and free drafting package from this Web Site.
http://www.doublecad.com/
The drawing file is attached below.
The first image is showing the full scale print out of the drawing taped to a 12" X 24" X 24Gauge sheetmetal I used the full 12" height to capture a 2" section of round & Rectangular overlay outside of the fold requirements.
The second Image shows the sheetmetal being marked as the paper is cut away at the cut lines. The fold lines are marked at the ends and scaled later with a steel rule & knife.
The third Image shows the sheetmetal marked complete.
The forth Image shows sheetmetal cutout and ready to bend. I used 2 pieces of angle iron clamped to the bench to do the bending. The bottom section is the 2" Rectangular portion and the top section past the bend marks are for attaching the round inlet port with a finshed edge.
I got carried away during the bending and assembly process and forgot to take any pictures. The bending is an easy process since you only need to make very small 15 deg. bends. I used a "hook" joint and a 5" round insert too attach the transition together at the seam, then I hammered the seam closed and filled it with solder. The rectangular end I just rivited (Hammer & anvel not pop rivits) the ends together. I then attached (rivits) a 5" finished section from a 4" to 5" transition then taped up all the rivited joints.
The following pictures are the finished product and how it inserted into the tophat. I was lucky to get a press fit, when I installed the top the Evolution can't be removed.
I haven't used the tophat yet since I am still working on my duct work. I will post some more pictures on my top hat build and what I am doing with my duct work and 50-760 DC.
I ordered my duct work parts from KenCraft.com on Jan 4 and They shipped it Today 1/5. Good service...
Here is the DoubleCAD XT file:
ftp://
Ron
I downloaded these instructions from the following Web Site:
http://joe.emenaker.com/DuctEvolution/index.html
I used joe's EXCEL and PDF instructions to create a drawing file using "DoubleCAD XT" which is a very good and free drafting package from this Web Site.
http://www.doublecad.com/
The drawing file is attached below.
The first image is showing the full scale print out of the drawing taped to a 12" X 24" X 24Gauge sheetmetal I used the full 12" height to capture a 2" section of round & Rectangular overlay outside of the fold requirements.
The second Image shows the sheetmetal being marked as the paper is cut away at the cut lines. The fold lines are marked at the ends and scaled later with a steel rule & knife.
The third Image shows the sheetmetal marked complete.
The forth Image shows sheetmetal cutout and ready to bend. I used 2 pieces of angle iron clamped to the bench to do the bending. The bottom section is the 2" Rectangular portion and the top section past the bend marks are for attaching the round inlet port with a finshed edge.
I got carried away during the bending and assembly process and forgot to take any pictures. The bending is an easy process since you only need to make very small 15 deg. bends. I used a "hook" joint and a 5" round insert too attach the transition together at the seam, then I hammered the seam closed and filled it with solder. The rectangular end I just rivited (Hammer & anvel not pop rivits) the ends together. I then attached (rivits) a 5" finished section from a 4" to 5" transition then taped up all the rivited joints.
The following pictures are the finished product and how it inserted into the tophat. I was lucky to get a press fit, when I installed the top the Evolution can't be removed.
I haven't used the tophat yet since I am still working on my duct work. I will post some more pictures on my top hat build and what I am doing with my duct work and 50-760 DC.
I ordered my duct work parts from KenCraft.com on Jan 4 and They shipped it Today 1/5. Good service...
Here is the DoubleCAD XT file:
ftp://
Ron