용접형 NC드릴 CODE NODia xPoint AngleLengthof FluteOverallLengthShankDiaΦD x 90 °L1LΦdNCTBN 10010 x 90 °248010NCTBN 12012 x 90 °3410012NCTBN 16016 x 90 °4012016NCTBN 20020 x 90 °4016020