Center finder for disc punch

thingiverse

Sometimes you might want to make a hole in a punched disc which should be exactly in the center in order to produce a washer-like shape. A simple solution to this is to first stamp out the smaller hole in a piece of sheet metal and then center that in the larger stamp position. However, most disc punches come without any tools to find the center of a hole. So, this tool comes in handy. Simply print the part you are missing - you probably won't need all sizes - cheap, easy, quick (much quicker than turning a metal rod on a lathe). Since disc punches usually come in metric as well as imperial, this tool can be set for metric or imperial as well.