Since only a few of the cutting edges are engaged with the workpiece at a time, heavy cuts can be taken without adversely affecting the tool life.

由于同一时间只有部分切削刃切削工件，因此可以在对刀具寿命没有不利影响的情况下承担重型切削。

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So improvements of the obdurability of the tool tips and cutting edges are very important to better the cutting property of the end mill.

刀尖是刀具中最薄弱的环节，提高刀尖及切削刃的强韧性对改善刀具切削性能尤其重要。

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