Calculating mating teeth's geometrical factors for concentric three - jaw chucks

After utilizing mating teeth of 03 jaws of concentric three - jaw chucks usually have been failed while other parts of the chucks can be able to operate normally. Hence, the authors present one way how to calculate matting teeth's geometrical factors of jaws in concentric three jaw trucks in order to renew and reuse these trucks in mechanical enterprises. In addition, a draft of a manufacturing process of marking this part is also presented in this paper.