ULTRA-FINE ELECTRIC DISCHARGE MACHINE

摘要

PROBLEM TO BE SOLVED: To provide an ultra-fine electric discharge machine for realizing positioning of a tool keeping high accuracy even in long period machining. SOLUTION: A head main body part 4 (holding part) is made of a low expansion material in the ultra-fine electric discharge machine provided with the head main body part 4 for holding a rotary tool electrode 2 and a motor 5 for rotating and driving the rotary tool electrode 2.