Intermediate shaft and manufacturing method thereof

PROBLEM TO BE SOLVED: To provide an intermediate shaft capable of being formed without thick coating easy to generate a vacuum void causing a defect or the like, by a powder fluidization immersion method using a powder coating, and including a resin coating layer excellent in heat resistance and abrasion resistance, and provide a manufacturing method thereof.SOLUTION: In a state where crosslinking agent of thermoplastic resin contained in a powder coating is carried in advance on a surface 17a of an outer spline 17 or inner spline, the powder coating is applied to the surface by a powder fluidization immersion method and is subjected to fusion flowing, and further the thermoplastic resin is crosslinked by the crosslinking agent to form a resin coating layer 20.SELECTED DRAWING: Figure 5