cnc压铸铝件钻孔的参数。普通丝攻 挤压丝攻 底孔直径 SF 底孔直径 SF M1.0×0.25 0.75~0.78 120 0.25 0.86~0.88 400 0.25 M1.2×0.25 0.95~0.98 150 0.25 1.06~1.08 450 0.25 M1.4×0.3 1.1~1.14 210 0.3 1.24~1.25 500 0.3 M1.6×0.35 1.25~1.32 280 0.35 1.41~1.43 560 0.35 M1.5×0.35 1.15~1.2 250 0.35 0.35 M2.0×0.41.6~