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.

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. 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.

You ll need a drill sheet metal snips a start collar. How to cut holes in corrugated steel. For this step you ll need a compass ink and a center punch. In response to a question about h.

Be that as it may here is a neat idea from flyboy accessories for cutting larger holes in sheet metal. In this video we show you the best and safest way to cut a round hole into a can or rectangular duct. Any tin snips will work for this. But when you come to the thicker locking seam you ll need the extra leverage of compound snips.

Follow few steps step 1. At first locate the center of the. 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. First if you want to cut a duct near the middle and use both ends mark and cut the duct before snapping it together.

If you are talking about a hole the size of your fist or odd shaped this works pretty well. How to cut a round hole in sheet metal. 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. 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.

Measure from the edges of the sheet metal to the point at which you. Punch a hole through the metal using a cold chisel and mallet or drill through with a heavy duty drill. Create a paper pattern of the size and shape of hole you wish to cut. There are two ways to cut round ducts.

For drilling holes in steel that s 1 8 in. Then use a rotary bit or file or other method to clean it up the edge to your scribe line. Or thicker use cutting fluid or a multipurpose oil like 3 in one.