Abstract
Authors proposed already a direct tool chucking mechanism for high-speed spindle, which incorporates a mechanism to prevent the chucking force reduction at high-speed. In this paper, the new version of the chucking mechanism was proposed to resolve its weak points and analyzed the basic characteristics of the mechanism with finite element method. As the result, the following were made clear : 1) The accuracy of tool position after chucking is very high, and 2) Chucking force is distributed widely from the back end of tool to front end of chucking mechanism.
