Cutting Round Holes In Sheet Metal

How to cut a round hole in sheet metal.

Cutting round holes in sheet metal.

Then use a rotary bit or file or other method to clean it up the edge to your scribe line. But when you come to the thicker locking seam you ll need the extra leverage of compound snips. First if you want to cut a duct near the middle and use both ends mark and cut the duct before snapping it together. There are two ways to cut round ducts.

For drilling holes in steel that s 1 8 in. Measure from the edges of the sheet metal to the point at which you. Be that as it may here is a neat idea from flyboy accessories for cutting larger holes in sheet metal. 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.

When cutting out a circle one or sometimes two cutting tools are rotated about a center point to. Lubricating the bit reduces friction and heat buildup which makes drilling easier and your bits last longer. Don t say that you were thinking of holding that metal sheet with bare hands. How to cut holes in corrugated steel.

Create a paper pattern of the size and shape of hole you wish to cut. For this step you ll need a compass ink and a center punch. Punch a hole through the metal using a cold chisel and mallet or drill through with a heavy duty drill. 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.

Or thicker use cutting fluid or a multipurpose oil like 3 in one. In this video we show you the best and safest way to cut a round hole into a can or rectangular duct. If you are talking about a hole the size of your fist or odd shaped this works pretty well. Follow few steps step 1.

At first locate the center of the. You ll need a drill sheet metal snips a start collar. 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. Any tin snips will work for this.

In response to a question about h. 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.