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由苏联奥尔沙工具厂制造的装配式笔状高速切削钻头适用于普通机床和数控机床,可用以加工结构钢、合金钢、铸铁、有色金属穿透的深孔。被加工孔直径公差为H14～H12,表面粗糙度R_2为40μm。钻头由刀杆3(图1)及用固定螺钉2紧固在刀杆沟槽上的可换切削刀片1等组成。这种钻头在钻穿时能消除其轴线的偏移。推荐使用ΓOCT25526-82涂上5～8μm TiN涂层的切削刀片,它比无涂层的刀片寿命提高一倍。
Assembled pen-shaped high-speed cutting bits manufactured by the Soviet Orsha tool factory are suitable for use on general machine tools and CNC machine tools and can be used to machine structural steel, alloy steel, cast iron, non-ferrous metals through deep holes. The machined hole diameter tolerance is H14 ~ H12, the surface roughness R_2 is 40μm. The drill bit is composed of an arbor 3 (FIG. 1) and a replaceable cutting blade 1 fastened to the arbor groove with a fixing screw 2. This bit eliminates the offset of its axis when drilling. Recommended ΓOCT25526-82 5 ~ 8μm TiN coated cutting inserts, which double the life of uncoated inserts.