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.

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. When cutting out a circle one or sometimes two cutting tools are rotated about a center point to. Measure from the edges of the sheet metal to the point at which you. Photo 3 shows how to cut through thick metal.

You ll need a drill sheet metal snips a start collar. In response to a question about h. For this step you ll need a compass ink and a center punch. At first locate the center of the.

How to cut a round hole in sheet metal. Use clamps to hold the sheet. 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.

First if you want to cut a duct near the middle and use both ends mark and cut the duct before snapping it together. In this video we show you the best and safest way to cut a round hole into a can or rectangular duct. How to cut holes in corrugated steel. Or thicker use cutting fluid or a multipurpose oil like 3 in one.

Lubricating the bit reduces friction and heat buildup which makes drilling easier and your bits last longer. 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. But when you come to the thicker locking seam you ll need the extra leverage of compound snips.

Any tin snips will work for this. There are two ways to cut round ducts. 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. Be that as it may here is a neat idea from flyboy accessories for cutting larger holes 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. For drilling holes in steel that s 1 8 in. For easier to drill metals like aluminum brass or cast iron lubrication isn t usually necessary.