Abstract
This paper describes the friction coefficient between chuck-part made of aluminumalloy and spindle made of steel, which is obtained in the experiment. In the experiment, the friction force is loaded by a PZT-element in the direction perpendicular to the bolt thrust. The friction force and the bolt thrust are measured with load-sensor of Kistler and A/D converter, and the friction coefficient is calculated as the ratio of those forces. It is clarified that the friction coefficient gradually increases with the increase in relative displacement between chuck-part and spindle under small displacement.
