Cutting Round Holes In Sheet Metal

Use clamps to hold the sheet.

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. Photo 3 shows how to cut through thick metal. Lubricating the bit reduces friction and heat buildup which makes drilling easier and your bits last longer. 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.

For drilling holes in steel that s 1 8 in. For this step you ll need a compass ink and a center punch. You ll need a drill sheet metal snips a start collar. How to cut holes in corrugated steel.

In this video we show you the best and safest way to cut a round hole into a can or rectangular duct. Punch a hole through the metal using a cold chisel and mallet or drill through with a heavy duty drill. Follow few steps step 1. 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.

There are two ways to cut round ducts. Don t say that you were thinking of holding that metal sheet with bare hands. Then use a rotary bit or file or other method to clean it up the edge to your scribe line. If you are talking about a hole the size of your fist or odd shaped this works pretty well.

Measure from the edges of the sheet metal to the point at which you. At first locate the center of the. In response to a question about h. 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. How to cut a round hole in sheet metal. Create a paper pattern of the size and shape of hole you wish to cut. 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.

Or thicker use cutting fluid or a multipurpose oil like 3 in one. When cutting out a circle one or sometimes two cutting tools are rotated about a center point to. Any tin snips will work for this.