Cutting Thick Sheet Metal

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The lower the number the thicker the metal is.

Cutting thick sheet metal.

A handheld cutting tool fitted with a metal cut off wheel will easily cut through sheet. Here are a few tips for cutting metal with a recip saw. Simply line up your chisel along the line you are going to cut and strike the back of it with a hammer. Extend blade life by keeping the saw s speed slow.

If you ve hit it hard enough the chisel will cut the sheet metal if it s thin enough. Tin snips or aviation snips are one of the most widely used tools to cut sheet metals. They don t cut curves well. Set your saw to straight rather than oscillating if there s a choice.

Straight cutting compound snips work best for cutting thick or doubled up sheet metal. There are two ways to cut round ducts. Wax your saw blade before cutting sheet metal. There are some cuts that you can do with decent tin snips.

Using a chisel and hammer is the most basic form of cutting sheet metal. Choose a blade with 20 to 24 tpi teeth per inch for thin metal 10 to 18 tpi for medium thickness metal and about 8. Most sheet metal cutting tools are limited to 16 gauge and thinner 14 gauge is still sheet metal but in common forms 11 gauge while technically sheet metal is 1 8 thick and not really sheet metal for the purposes of this article so we will focus on 16 gauge and thinner. For a cleaner cut put a strip of masking tape on the top and bottom of the sheet to keep chips from scratching the material.

First if you want to cut a duct near the middle and use both ends mark and cut the duct before snapping it together. Such as straight cut snips left cut the right cut etc. A hacksaw can cut sheet metal but its shape limits its turning radius and depth of cut. Cutting straight lines with an electric saw.

How to cut sheet metal method 1 of 4. To prolong blade life rub wax along the length of the blade. Making detailed cuts with. They look like scissors and work fine with sheet metals like brass aluminum tin steel etc.

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