Cutting Round Holes In Sheet Metal

Measure from the edges of the sheet metal to the point at which you.

Cutting round holes in sheet metal.

For this step you ll need a compass ink and a center punch. If you are talking about a hole the size of your fist or odd shaped this works pretty well. Any tin snips will work for this. When cutting out a circle one or sometimes two cutting tools are rotated about a center point to.

You ll need a drill sheet metal snips a start collar. Lubricating the bit reduces friction and heat buildup which makes drilling easier and your bits last longer. At first locate the center of the. First if you want to cut a duct near the middle and use both ends mark and cut the duct before snapping it together.

Then use a rotary bit or file or other method to clean it up the edge to your scribe line. In this video we show you the best and safest way to cut a round hole into a can or rectangular duct. There are two ways to cut round ducts. How to cut holes in corrugated steel.

Or thicker use cutting fluid or a multipurpose oil like 3 in one. For drilling holes in steel that s 1 8 in. But when you come to the thicker locking seam you ll need the extra leverage of compound snips. Use clamps to hold the sheet.

When drilling or punching a hole in sheet metal you more or less cut out the entire hole at once. 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. Photo 3 shows how to cut through thick metal. For easier to drill metals like aluminum brass or cast iron lubrication isn t usually necessary.

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. 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. How to cut a round hole in sheet metal.

Be that as it may here is a neat idea from flyboy accessories for cutting larger holes in sheet metal. Follow few steps step 1. In response to a question about h.