FIELD: strengthening treatment of surfaces. SUBSTANCE: device is used for strengthening treatment of internal cylindrical surfaces by shot. Device has nozzle assembly for ball acceleration and dummy cylinders arranged on ends of cylinders in level with their internal surface. Nozzle assembly is represented by turbo-adapter with power turbine and nozzles-catches mounted for rotation from power carrier. Turbo-adapter is positioned in supports with channels for power-carrier supply. Provision is made for superposition of cavitation- ultrasonic oscillations on power-carrier flow. EFFECT: extended device capabilities. 6 cl, 2 dwg
