直径为40～60mm、深为100～150mm的淬硬零件精密孔通常使用装有偶数金刚石油石的珩磨头来进行最终加工,但是采用这种刀具在生产中往往不能得到较高几何形状精度的孔。单油石珩磨头则能解决这个问题。苏联拖拉机农业机械制造工艺科学研究所设计了单油石珩磨头。它包括刀头体5、放松斜铁3和装有焊接油石6的T形斜铁4。在刀头体内牢固地装有硬质合 Quenched parts with 40 to 60 mm diameter and 100 to 150 mm deep precision holes are usually machined using honing heads with an even number of diamonds, but the use of such tools often fails to achieve high geometrical accuracy hole. A single stone honing head can solve this problem. Soviet Union Tractor Agricultural Machinery Manufacturing Process Science Institute designed a single stone honing head. The utility model comprises a cutter body 5, a relaxing slanted iron 3 and a T-shaped tilting iron 4 which is provided with a welding oilstone 6. In the blade body firmly equipped with hard cohesion