Cutting Round Holes In Sheet Metal

Depends on how big a hole you are talking about but there is a technique they tought us i am an aircraft structural repair guy called chain drilling.

Cutting round holes in sheet metal.

When drilling or punching a hole in sheet metal you more or less cut out the entire hole at once. For easier to drill metals like aluminum brass or cast iron lubrication isn t usually necessary. For this step you ll need a compass ink and a center punch. Don t say that you were thinking of holding that metal sheet with bare hands.

Use clamps to hold the sheet. How to cut a round hole in sheet metal. Photo 3 shows how to cut through thick metal. Follow few steps step 1.

Any tin snips will work for this. If you are talking about a hole the size of your fist or odd shaped this works pretty well. First if you want to cut a duct near the middle and use both ends mark and cut the duct before snapping it together. Be that as it may here is a neat idea from flyboy accessories for cutting larger holes in sheet metal.

When cutting out a circle one or sometimes two cutting tools are rotated about a center point to. 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. Punch a hole through the metal using a cold chisel and mallet or drill through with a heavy duty drill. In response to a question about h.

But when you come to the thicker locking seam you ll need the extra leverage of compound snips. In this video we show you the best and safest way to cut a round hole into a can or rectangular duct. 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. Lubricating the bit reduces friction and heat buildup which makes drilling easier and your bits last longer.

At first locate the center of the. You ll need a drill sheet metal snips a start collar. Or thicker use cutting fluid or a multipurpose oil like 3 in one. There are two ways to cut round ducts.

How to cut holes in corrugated steel. All you do is use a normal drill bit 125 or so and drill a series of holes right next to each other like a chain inside of your scribed line. Create a paper pattern of the size and shape of hole you wish to cut.