我厂的产品中多是结构简单多孔的零件,且大部分是0.5～20公厘以内的2级精度孔。因此,对装配用的梢子和检查孔径用的光滑圆器的制造感到极大困难,如φ3公厘的梢子和φ0.5～3公厘以内的圆器等就是如此。但是,由于有了苏联的先进资料,根据无小磨削的原理设计了小直径无心磨削夹具? I plant products are mostly simple and porous structure of the parts, and most of the 0.5 to 20 mm within the 2-precision hole. Therefore, it is extremely difficult to manufacture the tip for the assembly and the smooth circle for inspecting the aperture, such as the tip of φ3 mm and the circle of φ0.5 to 3 mm. However, due to the advanced data from the Soviet Union, small diameter centerless grinding tools were designed based on the principle of no small grinding.