Best video ever created on the step by step process of laying out a square to round. Most of the other videos explain the process as if you already knew how to make one. This one really slowed things down and explained it for the beginners. I have a job interview and this has helped me so much. Thank you. !
I'm building a duct for my dryer vent out aluminum. The duct goes over my stairs so I wanted it to be square going over the stairs and be able to connect to the dryer vent on each sides of the stairs. This was incredibly helpful to make the square to round for each side of the stairs. Very simple explanation on how to figure this out. Thank you!
I was taught this method of pattern development as an apprentice in the 60's. More complex developments can be found in the book The Geometry of Sheet Metalwork by Dickinson and I passed on my copy to one of the promising apprentices at my workplace when I retired in 2016. Modern development techniques are done on CAD and transferred straight to a CNC machine which cuts the pattern out ready for forming and has resulted in the diminishing skill levels within the trade in my opinion.
I've been doing sheet metal in one way shape or form for 35 years. The saying " if you don't use it you lose it " Well, we have a job coming up and I haven't made a sq to rd for ten years. This was the perfect refresher to knock the cobwebs loose. You were easy to listen to and you made it simple to understand. Cool vid.
Thank you so much. This is really neat to see you measure using arcs instead of linear marks. Very cool. I'm going to try it with a 10" square to 12" round.
Great video I've been doing sheet metal for 20 years and I've watched some of the older guys lay these out but have never understood how they figured there measurements I'm going to make one tomorrow 😀
thank you - Very well presented & explained. I've got the material - shear - brake and now the knowledge. I'd think anyone tackling something like that would know (or they'd sure learn fast) to add for 'seams' 'again, thank you
best exp U R number one I'am looking for serveral time and lot of channal but do not understand you make me understand in one time so,thank a lot Jeew from Thailand.
They taught me this in my freshman in high school , I took sheet metal and A/C . We made everything out of sheet metal , even bird feeders. Great job on the video
Good tutorial. However, when you set your small dividers from points 3 to 4 @ 11:24 you're not taking into account the stretch out of the round between those points. As a result the 6" diameter will be small and fitting your collar will give you fits. BTDT. We were taught to draw a line that represents one quarter of the actual stretch out of the 6" round. ( 6 x 3.14 )/4 = 4-11/16". Now divide that 4- 11/16" line into your equal sections and set your small dividers to that. I prefer to divide the circle into 16 equal spaces rather than 12, its a little more work, but produces better fit at the collar. I'm really not trying to nit pick, but there's nothing worse than wasting time and metal only to find that a minor mistake turns into a WTF! moment after you form it.
The layout would be done the same way as this…. Only difference would be that the straight lines on the pattern , you might want to start further in on the sheet, as the pattern sides (a-b, c-d) would go down on the sheet, rather than up… Round part would change shape too, but how much would depend on the size, but the act of laying it out would be the same steps
