Punching Holes In Copper Sheet

Plus with the gauge.

Punching holes in copper sheet.

If the holes are in thicker sheet metal and are going to be tapped out with a thread after punching a smaller pilot hole may need to be punched and then. You don t need fancy or expensive tools for punching holes in the most common gauges of jewelry sheet metal. A hand punch such as those by roper whitney can be used to make perfect holes in sheet metal quickly and with relatively little effort. It can be texturized with a variety of objects such as a small hammer or polished for a smoother finish.

Square inches to be sheared l w l w x t. They create a smooth clean hole without barbs or rough edges. This chart shows the tons of force required for punching a single round hole in mild steel derived by the formula. For punching holes in jewelry metals.

Tons of pressure required hole size x material thickness x constant 80. Here s a list of simple punches that do the job. So for example a diameter 5mm punch with a 0 2mm die clearance die will produce a hole that is diameter 5mm on the punch side of the sheet and diameter 5 2mm on the die side of the sheet. By the way a crop a dile will easily punch a hole in your copper sheet up to the 16 mil thickness.

You can see the crop a dile hole in the 10 mil and 16 mil sample photos. An approximation can be made of the cylinder force needed to punch a hole slot or notch using this method. What size portable hole punch or hydraulic ironworker machine is needed for punching a hole size. Spiral twist hand drill.

For larger holes or use on thicker gauges of steel more. Just make sure the punch is designed for the type and gauge of metal you re using. In the illustration it would be the distance around the hole perimeter multiplied by metal thickness. Chart showing tonnage required to punch a hole.

Metal hole punch pliers.