Abstract
In these experiments, a chain saw was driven by electric dynamometer with constant speed of 10.5 m/s at the tip of teeth and a timber with uniform diameter of 36cm was cut across. In this case, power necessary for cutting, time elapsed from the first to each section of the timber, normal force between teeth and the timber etc. were measured respecting to four kinds of teeth. As a result, three factors weree proposed to show the cutting performance of a chain saw.
