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The choice of the cutting parameter is concerned with cutting procedure and chips, also related with the material,processing precision and machine’s features.
1. Cutting speed
The cutting speed is depends on the tooling material, also for the limitation of the drill bit and machine rotary speed. At present, the cutting speed of high speed steel is 35-70m/min.
2. Feed volume
Feed volume is mainly concerned with rigidity and intensity of tooling and machine. Besides, the the processing surface finish,chip removing and cutting oil also effect the feed volume. For now, the feed volume of high speed steel is 0.01---0.032mm/r. When the hole diameter is big, we choose the big one. And below is the gun drill cutting parameter for your reference:
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