由于长镗杆不具有足以防止偏心和颤动的刚性。因而在深孔的镗削过程中,有时很难保持准确的尺寸和良好的表面光洁度。我们采用以工件自己的内径来做支撑的镗杆,解决了表面光洁度不高的问题。螺纹管座和标准钢球是安装在相对于刀具尖端180°的后面,这个偏置位移为3/4″。(若从背面看这个图就会更明显些)。 Long boring bars do not have rigidity sufficient to prevent eccentricity and chatter. As a result, it is sometimes difficult to maintain accurate dimensions and good surface finish during boring of deep holes. We use a boring bar supported by the workpiece’s own inner diameter to solve the problem of low surface finish. Threaded socket and standard ball are mounted 180 ° behind the tip of the tool, offset by 3/4 ". (This will be more apparent if viewed from the back.)