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The choice of cutting parameter is related with the cutting procedure and cutting chips. Also related with the processed parts, processing precision and machine character etc.
1. Cutting Speed
It is mainly depends on the material of gun drill, incorruptibility of drill bit and limitation of machine rotary speed. At present, the cutting speed of high speed steel is 35-70m/min. For the carbide gun drill, take the below chart for reference.
2. Feeding Volume
It is mainly under the limitation of technical system (gun drilling tool, workpiece and deep hole drilling machine etc.) rigidity and intensity. Besides, also related with the processing surface, chip removing result and cutting oil. For now, the feed volume of the high speed steel is 0.01mm to 0.032mm/r. When the drilling hole diameter is big, we take the big feed volume. For the carbide gun drill, take the below chart for reference.
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