I have used an old, worn out plywood blade in my circular saw, installed backwards. The teeth are now worn almost smooth from cutting LOTS of sheet metal. It will make good cuts, but it does it by melting the sheet metal, which burns the paint or galvanizing at the cut. That hasn"t seemed to matter much, but it seemed like a place that might rust. Also it is extremely loud and the process throws sparks of molten metal. It will sure make a plastic case circular saw look ugly from the hot metal bits sticking to it. But it works, it is cheap and as accurate as the operator of the circular saw can make it.
However the cuts made with a shear by the metal supplier are MUCH nicer. When I am going to order sheet metal, I measure very carefully for each piece and make a drawing of what lengths are supposed to go where. Still there are always a few places that end up needing cuts at the building site.
I have tried tinsnips and still use them for some things, but I have a hard time matching the accuracy and speed of using the circular saw, especially when crossing ribs.
Safety gear is a must! Ear protection, GOOD eye protection (and maybe a face shield) and heavy gloves are necessary. And I wouldn"t plan wearing the clothes you wear while cutting to town afterwards! Good luck.
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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