How to Cut the Edge on a Chain Saw

Proper Round Files

• Each chain used on a chainsaw has a different set of specifications and measurements. These measurements determine the type, size and cutting angle of the chain. These measurements are required to find the proper round file to cut the edge on the chain. The pitch of the chain measures the distance between any three rivets divided by two. The pitch will set the size of the teeth and is the most important measurement for the operator. The file size must match the pitch of the chain for the edge to be ground properly. Use only round files designed for chainsaw chain sharpening.

Filing the Teeth

• Every tooth on the chainsaw uses a predetermined angle. This angle optimizes the cutting capacity of the chain. For the chain to cut properly, the operator must file the teeth according to this angle. Most newer chains have an angle imprinted into the top of the tooth. Use this as a filing guide. Line up the file's tip with the angle of the tooth. Hold the file parallel with the ground and push it firmly and smoothly across the edge of the tooth. File away any nicks and burrs on the edges until every tooth is sharp and smooth.

Filing Depth Gauges

• The depth gauge sits in front of every tooth on the chain and measures the depth of the slice of wood taken out when cutting. These depth gauges also need regular filing to maintain the proper chainsaw cutting edge. File these teeth with a crosscut flat file. Hold the file parallel with the ground and push it over smoothly and evenly. Use a depth gauge guide to measure the amount of metal that should be filed off and don't take off too much.

Other Tips

• Hand-filing a heavily damaged chainsaw chain can become a daunting task for the beginner. However, with practice and a few tips, this process need not be time consuming. Sharpen the teeth regularly, before and during each refueling stop and afterward. This will ensure you need only a small number of strokes to keep the edge sharp. Also, apply the same number of file strokes to every tooth to ensure they're filed uniformly. Always wear leather work gloves to protect your hands while filing.