Measuring step surface round jump tool
It is very difficult to measure the axial runout of the inner step surface in the case where the stepped hole parts have little difference between the large and small apertures. Because it is placed on the deflection instrument after jumping into the mandrel, the measuring head can not be in contact with the step for effective measurement. The 190 injection pump body produced by our factory (Fig. 1) is like this. The circular surface of the surface D and the mesoporous φ13_0~(+0.027)mm is not more than 0.03, which has long been