The finishing cut , to make the work smooth and accurate , is a finer cut 精切削是使工件表面光滑、尺寸准确,因而是一种更精细的切削。
Generally speaking , bars of steel , forging , castings , etc . are machined to the required shape and size with only one roughing and one finishing cut 一般地说,钢质棒料、锻件、铸件等只经一次粗切削和一次精切削即可达到所要求的形状和尺寸。
Also , in some jobs , fot example , when great accuracy is not needed , or when a comparatively small amount of metal must be removed , a finishing cut may be all that is required 有些加工,如精度要求不高或需要切除的金属量较小,也可能只需一次精切削。