该技术适用于各种深、浅孔的高效加工、高精度加工及高难度的孔加工(包括难切削材料及骓加工零件)。刀具结构新颖、孔加工工艺先进,刀具耐用度和生产效率比普通刀具高1～10倍。孔加工最高尺寸精度达1T7～1T9级,圆度误差为1～8μm,表面粗糙度R_a0.2～3.2μm。四刃带麻花钻,不同于国内外的同类钻头,切削刃为径向刃,大螺旋角,容屑空间大,钻削一 The technology is suitable for a variety of deep and shallow holes of efficient processing, high precision machining and difficult hole machining (including difficult to cut materials and machining parts). New structure of the knife, hole machining advanced technology, tool durability and productivity than the average tool 1 to 10 times. Hole machining the highest dimensional accuracy of 1T7 ~ 1T9 level, roundness error of 1 ~ 8μm, surface roughness R_a0.2 ~ 3.2μm. Four-edge twist drill, different from the same type of drill at home and abroad, the cutting edge for the radial blade, a large helix angle, the chip space, drill a