Cutting Large Holes In Sheet Metal

I ve messed with trepanning tools abrasive wheels hole saws and all manner of other stuff for cutting large holes in sheet metal.

Cutting large holes in sheet metal.

Use a scrap of plywood as a backer for the hole saw s pilot bit and to protect your work surface. In a well designed sheet metal cutting process the cracks should meet each other and form a continuous break. Place your sheet metal on your steel block and position your centre punch at a central point in your cut out design. 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.

Use clamps to hold the sheet. In response to a question about h. 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. This break will create the fracture region.

Don t say that you were thinking of holding that metal sheet with bare hands. At first locate the center of the. For this step you ll need a compass ink and a center punch. For large holes a hole saw gets the job done cleanly and quickly.

It is common practice to use a self starting step bit to form the. Tap your hammer to leave an indentation on the sheet metal. Follow few steps step 1. How to cut a round hole in sheet metal.

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.