The spindle adopts Makino's renowned spindle core cooling and under race lubrication system that minimizes thermal distortion even over long hours of high-speed operation. This produces superior machined surface quality along with mating surfaces without any level differences. Moreover, the spindle is supported by cylindrical roller bearings having an inner diameter of 100 mm, providing a rigid construction for executing a wide range of machining jobs, including high-speed finish machining.