A powder injector assembly for delivering powder into an axial flow of heated gas of a powder coating applicator. The assembly includes a powder injector rotatable in a plane whose centerline is perpendicular to the gas flow for issuing powder thereto. An injection nozzle exit port is integral with and leads from the injector and is disposed in the centerline for angular rotation thereabout, and is alignable into the gas flow for powder melting and subsequent substrate deposition. An integral cooling system maintains the powder in a non-melted state until its exit. The injector is independently movable laterally, axially, and angularly for respective radial, axial, and angular movement of the injection nozzle exit port. Angular movement occurs along a centerline passing through the tip of the nozzle exit port to thereby permit independent angle adjustment without changing axial or lateral locations of the injection point.