Wear eye and face protection. Grinding the metal on the chains will create sparks and flying metal dust. Wear work gloves to prevent burns or other injuries.
Clamp the saw securely to your work surface. If you are modifying an electric saw, make sure that it is unplugged. Test the saw to make sure it is stable on the work surface. Lay out your tools so they are easily accessible.
Use the grinder to slowly thin the cutting teeth by about a third. Modifying too quickly could create metal burrs that will reduce your ability to make fine cuts.
Grind down the rakers. The rakers are depth gauges that ride ahead of the cutting teeth and limit the depth of the cut. Warning: The rakers are a safety mechanism. Grinding these down will make for more precise cuts in ice, but render the saw extremely unsafe in any other medium.
Grind the back corners of the cutting teeth until they are rounded. This will reduce the amount of resistance that you experience as the chain passes through the ice.
Sharpen the chain. Mark the first tooth that you sharpen. Using the diamond-sharpening dremmel tool, hold the tool at a 45-degree angle and rub gently back and forth on all the teeth facing to the right to sharpen the cutting surface. Repeat with all the teeth facing left. If you allow the tool to drag over the front of the tooth you will dull the surface, so be careful to keep the angle on the dremmel tool.