精度的级数同一尺寸的不同机件,在加工中所需要的公差是不相同的。公差的大小,须视该机件的特性或怍用,由所需的精度而决定之;这个在轴同孔的加工制造中,可以体验到。此种精度要求的规定,通常以级数来代表之。在同一级精度中,仍可以得到程度不等的配 Accuracy of the same series of different sizes of parts, in the process of tolerance is not the same. Tolerance of the size, depending on the mechanical properties of the parts or use, determined by the required accuracy; the same hole in the shaft manufacturing process, you can experience. The requirements for such accuracy are usually expressed in series. In the same level of accuracy, you can still get the level of distribution