＊ 3-flute high rigidity ball design conforms features of 5-axis machine to reduce total manufacturing cost with high precision and high efficiency machining. ＊ Even hardened steel of 45 to 70HRC can be machining with long tool life and high efficiency. ＊ By adopting positive cutting edge for carbide material emphasized breakage resistance that suppresses chattering by 3-flute and unequal flute. ＊ R accuracy is ±0.005 mm (R accuracy is based on a half value of actual diameter). ＊ Shank diameter tolerance, high accuracy type, is -0.001 ～ -0.003.