Abstract
Development of the lathe industry's turret with motor for CNC lathe milling. By simplifying the structure of rotary tool drive and installing a motor for rotary tools in the turret, transmission efficiency was improved and thermal displacement by coolant was achieved. Moreover, the turret developed was ultra-rigid to take into consideration its role as tool holder. As a consequence, machining characteristics, precision, speed, and surface quality have been improved to a standard superior to those attainable by a small machining center.
