Internal cylindrical operations include most of the common hole-machining operations, such as drilling, boring, reaming, counterboring, countersinking, and threading with a single-point tool or tap.

• 在螺丝车床上，靠丝杠驱动刀架，使车刀的运动与主轴的转动准确配合。内圆车削叫作镗孔，用以扩大已有的孔。要在实心工件上进行内圆车削，得先钻孔；用普通车床可以钻同心孔。