Cutting Rectangular Holes In Sheet Metal

Now it s time to use that center punch.

Cutting rectangular holes in sheet metal.

Measure from the edges of the sheet metal to the point at which you wish to place the hole. You could use a square punch but it s a bit spendy. Drill pilot holes slightly larger than the size of the stud. It does this by rapidly punching many overlapping holes to make the larger cut profile.

Also known as chassis and panel punches they cut through sheet metal and have an automatic centering design for accurate alignment. Use your center punch to strike at the center of the hole. Put your ink to the use and mark the hole center. A machine called a nibbler uses a small straight punch to create the same geometric removal of sheet metal as that of a larger more complicated punch.

Https amzn to 2ndf97w the best tin aviation snips. I don t mind a quick file to smooth sharp edges but to cut the whole hole with a file is too time consuming and labor intensive and not accurate. My idea is to get a standard 1 3 square punch and then punch two holes side by side to get my desired 1 3 x 2 3 rectangle but that could produce a crooked rectangle if the squares are not lined up. This will create dimples in the sheet.

Next use a compass to outline the edge of the hole. Https amzn to 2mkd0sj large screw driver. Sheet metal hole flaring dies create flares around already cut holes in sheet metal up to 3 16 thick to make the edges stronger and more rigid. Step 1 create a paper pattern of the size and shape of hole you wish to cut.

Punches for the cutting of holes and profiles in sheet metal may come in many different shapes and sizes. In response to a question about h. It s meant for creating lightening holes of the type seen when building aircraft or maybe just toolboxes and furniture that are built like wwii fighter planes. Https amzn to 2kstzae sheet metal hammer.

At first locate the center of the whole. Create a raised edge in sheet metal that locks into the rolled edge of another piece. I guess i ve got holes on the brain lately as i am finishing up the hole wizard for the g wizard conversational cnc product. Be that as it may here is a neat idea from flyboy accessories for cutting larger holes in sheet metal.

You could also cut the hole with a jigsaw. Also known as dimple dies.