Cutting Round Holes In Sheet Metal

You ll need a drill sheet metal snips a start collar.

Cutting round holes in sheet metal.

Any tin snips will work for this. When drilling or punching a hole in sheet metal you more or less cut out the entire hole at once. Be that as it may here is a neat idea from flyboy accessories for cutting larger 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.

For easier to drill metals like aluminum brass or cast iron lubrication isn t usually necessary. Lubricating the bit reduces friction and heat buildup which makes drilling easier and your bits last longer. But when you come to the thicker locking seam you ll need the extra leverage of compound snips. For drilling holes in steel that s 1 8 in.

When cutting out a circle one or sometimes two cutting tools are rotated about a center point to. 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. Use clamps to hold the sheet. Photo 3 shows how to cut through thick metal.

Or thicker use cutting fluid or a multipurpose oil like 3 in one. Punch a hole through the metal using a cold chisel and mallet or drill through with a heavy duty drill. In this video we show you the best and safest way to cut a round hole into a can or rectangular duct. Then use a rotary bit or file or other method to clean it up the edge to your scribe line.

How to cut a round hole in sheet metal. There are two ways to cut round ducts. How to cut holes in corrugated steel. Create a paper pattern of the size and shape of hole you wish to cut.

Measure from the edges of the sheet metal to the point at which you. Don t say that you were thinking of holding that metal sheet with bare hands. 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. First if you want to cut a duct near the middle and use both ends mark and cut the duct before snapping it together.

For this step you ll need a compass ink and a center punch. In response to a question about h. If you are talking about a hole the size of your fist or odd shaped this works pretty well.