The roughing cut, to remove the greater part of the excess material, should be reasonably heavy, that is, all the machine, or cutting tool, or work, or all three, will stand.

• 粗切削因为要去除大部分的余料，切削力量肯定是相当大的，这就意味着，整个机器、刀具、工件或这三者都要能承受得了。