| 摘要 |
A shrink-fit chuck having an eccentric positioning section is provided to perform a control for an insertion process of an instrument in an inner recess of a shrink-fit chuck by providing a chucking device which fixes the instrument on a machine tool. A shrink-fit chuck having an eccentric positioning section includes a fastening shank(12), a thermal expansion shrink unit(14), an inner recess(16), a step(18), and a pre-positioning section(20). The fastening shank and the thermal expansion shrink unit are used to be connected to a machine tool. The thermal expansion shrink unit has the recess and the pre-positioning section for matching a center of an instrument shank. The pre-positioning section is located on an upper part of the recess by the step, and has a small axial direction expansion unit. The pre-positioning section is located to be eccentric on the inner recess as much as the eccentric size. The pre-positioning section is formed by a cylindrical plane. The inner recess is formed by the cylindrical plane. |
