The article presents the results of the study of the process of processing parts with ex-centric oscillating strengthening. The scope of application and design features of the device are considered. The results of theoretical studies of the treatment process are given. Dependences are defined for calculation of indenter impact speed and kinetic energy of tool head with indenter at impact interaction. The parameters of the surface layer, which have the greatest impact on improving the operational properties of machine parts (depth of the hardened layer, degree of de-formation,
surface roughness), were studied. The developed theoretical dependencies are confirmed by the results of experimental studies of the processing process. The treatment time is calculated for different types of surfaces that have been treated. Said dependencies form the basis of engineering calculations of highly efficient processes of surface plastic deformation by oscillating eccentric tools. The research results were used to supplement the computational modules of the computer-aided design system of processing methods for dynamic methods of surface plastic de-formation used at modern machine-building enterprises in digital production.