sawing

Materials and Equipment
Chosing the right tools.
Choose a saw frame that is deep enough to make the desired cut. However, the shallower the saw frame, the easier it is to control, so use the shallowest saw frame that will suffice. If the blade is too fine for the gauge of metal being cut, you will be unable to cut a straight line, and will tend to break more blades. If the blade is too coarse the saw blade will be difficult to pull through the metal. A #2/0 saw blade is standard for 18 gauge metal. A #2 saw blade is standard for 16 gauge metal. If the metal is thinner, use an appropriately smaller blade.
Inserting the blade.
  1. Loosen the thumb-screws on both ends of the saw frame.
  2. Insert the saw blade in the top clamp and finger-tighten. The blade's teeth should face away from the saw frame and down toward the handle.
  3. Holding the frame by the handle, brace the top of the saw frame against the edge of the table and compress the frame by exerting pressure against it.
  4. Insert the loose end of the saw blade in the bottom clamp and finger-tighten the thumb-screw.
Starting the cut.
  1. Lightly lubricate the saw blade with beeswax or bar soap to make sawing easier.
  2. Hold the handle of the saw lightly but firmly with your thumb and first two fingers, and start the cut by making two to three upward strokes in the same place at the edge of the metal where you wish to make a cut. This will make a shallow groove in the edge of the sheet metal that will help keep the blade in place when making the first downward cutting stroke
Sawing.
  1. Hold the saw with the blade perpendicular in all directions to the sawing surface. If the saw blade is angled, the cut will be less accurate and the saw blade will break more easily.
  2. Draw the blade down, avoiding excessive forward and/or downward pressure.
Piercing.
  1. Piercing allows you to cut a shape from the interior of a piece of metal.
  2. Mark the shape you wish to cut.
  3. Center-punch and drill a hole slightly larger than the saw blade you will be using, just to the inside of the shape you wish to remove.
  4. Insert one end of the saw blade into the saw frame and finger-tighten.
  5. Insert the other end of the saw blade through the drilled hole and into the other end of the saw frame. Finger-tighten the thumb-screw to secure the saw blade.
  6. Saw out the desired shape.
Sawing tips.
Safety Precautions: