Cutting Large Holes In Sheet Metal

How to cut a round hole in sheet metal.

Cutting large holes in sheet metal.

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. This break will create the fracture region. Like twist bits hole saws chuck right into your drill and will cut through thin gauge sheet metals like aluminum and steel.

I ve messed with trepanning tools abrasive wheels hole saws and all manner of other stuff for cutting large holes in sheet metal. Place your sheet metal on your steel block and position your centre punch at a central point in your cut out design. Depending on the tools you have you ll now need to punch or drill a hole where the indentation has been made to produce an accurate hole in your 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.

Use a scrap of plywood as a backer for the hole saw s pilot bit and to protect your work surface. For this step you ll need a compass ink and a center punch. In a well designed sheet metal cutting process the cracks should meet each other and form a continuous break. Tap your hammer to leave an indentation on the sheet metal.

Use clamps to hold the sheet. For large holes a hole saw gets the job done cleanly and quickly. At first locate the center of the. The fracture region starts at the end of the burnish region and occupies most of the rest of the thickness of the cut with exception to the burr.

Step bits can be used to make even larger holes typically 1 3 8 inch wide or smaller in sheet metal but do require pilot holes.