Abstract
This paper presents the results of measurement and analysis of exciting force by mesh of gear for the purpose of figuring out the generating mechanism of the force. The equipment that measures the exciting force with a unit of helical gear by force sensors arranged to the spindle was developed. There was verticality force to a line of action observing the Lissajous' figure measured exciting force. Assuming that the force was frictional force, the verification examination was carried out by the spur gear that was simple of mesh. Comparing the prediction with measurement results, it has proved that the force has occurred by friction. And it is shown good correlation between measurement and analysis friction force.
