jigsaw is a versatile tool that easily cuts metal when you use the proper blade. You need to use a fine-tooth blade that has 21 to 24 teeth-per-inch (TPI). The higher the TPI, the finer the cut you will receive from the jigsaw. Beyond the blade, you will need to support the metal while cutting. Unsupported metal will bounce while you cut. This reduces the accuracy in cutting by the jigsaw and can cause the saw blade to jump from the cut and cause you or people in the area serious injury.
Insert a blade into the jigsaw. Pull on the end of the blade to ensure that it is secure.
Put on your leather work gloves and safety glasses. Metal shaving may eject at a high velocity from the cut and can severely injure eyes.
Place the jigsaw blade near the edge of the sheet metal. Put pressure down on the jigsaw.
Slightly depress the trigger of the jigsaw to start the blade moving slowly.
Slide the blade toward the metal. Keep downward pressure on the jigsaw as you cut. If the metal starts to bounce, pull the jigsaw back into the cut slightly and then proceed forward with the cut. Do not force the blade against the metal; let the blade do the work. Check the blade often during the cut, sheet metal will wear a jigsaw blade faster than wood.
Insert the 5/16 inch drill bit into the chuck of the drill motor.
Drill a 5/16 inch hole at each corner of an interior metal cut, if the cut does not intersect the edge of the sheet metal.
Place the jigsaw blade into one of the corner holes that you drilled in step seven.
Start the blade before you contact the edge of the sheet metal, as described in steps three and four.
Repeat steps eight and nine at each corner hole. Keep your feet clear of the sheet metal as it falls from the hole.