What is the difference between a 2 flute and 4 flute end mill?
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What is the difference between a 2 flute and 4 flute end mill?
Many people wonder whether it is better to use 2 flute milling cutter or 4 flute milling cutter when milling steel parts? What’s the difference between these two kinds of end mills?
Now let’s have our special consultant, Samuel and Gabriel, answer this question.
Samuel：
Thanks for invitation from Our.
This is mainly to see the situation, 2 flute end mill chip space, the relative strength of the tool is not enough. Small and closed space is more suitable. Therefore, the keyway cutter for milling keyway is 2 fluted.
In addition, the more flutes, the more feed. So there’s even a six flute end mill for finish machining.
The 3 flute end mill is mostly used for milling aluminum. The chip removal space is large and it is not easy to stick the cutter.
Gabriel：
I’m inclined to agree with Samuel.
Generally speaking, if the number of cutting flutes is small and the chip holding groove is large, the chip can be discharged smoothly, but at the same time, the cross-sectional area of the tool is small, the rigidity of the tool body is low, and the tool body is prone to bend in cutting.
On the contrary, with the increase of the number of cutting flute and the cross-sectional area of the tool, the rigidity of the tool body will be improved, but the chip holding groove will be smaller, and the chip holding force will be reduced, which will easily lead to chip blockage and reduce the surface finish of the workpiece.
In addition, the shorter the flute, the greater the rigidity of the tool body, and the better the cutting performance. The rigidity of the end mill is inversely proportional to the third power of the edge length.
Therefore, if the flute length (overhanging length) is doubled, the rigidity of the cutter body will be reduced to 1 / 8 of the original.
In addition to the end mill of milling steel parts, we also provide inserts for milling steel parts and turning steel parts. Welcome to consult.
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