Abstract: In the present article we mainly deal with the law of motion of the single cone bit with one rim of teeth on the basis of the results of experiments. It has been proved that the motion of the cone around its own axis and that of the bit around its own axis are not uniform, but variable. Besides, we have briefly discussed how forces are exerted on The cone and how the interaction happens between the bit and The steel bottom of the well.According to the results of experiments.