●Box guide ways realize long term high-precision and high rigidity. Heat treated box guide ways are installed on the surface which has high straightness and perpendicularity by scraping. ●Twin ball screw is adopted for driving all axes (X, Y, and Z) to realize the feed rate of 48 m/min and acceleration of 0.5 G, which is the highest in this class. ●Center trough eliminates troubles caused by cutting chips. ●In addition, HW55A is equipped with an access door that opens wide up to the ceiling and swing type operation board that enables a user to face parallel to the work piece in the machine for improved workability at presetting.