A fan stator assembly and an end cap of the motor have an interference fit. Initially, it was press-fitted on a manual screw press using the positioning method shown in Figure 1. The tire material in Figure 1 is 45 steel; the centering rod is quenched, the hardness is 55HRC, the upper outer diameter is the same as the rotor shaft diameter; the tire is quenched and tempered, the hardness is 220HB, the upper outer diameter is the same as the outer diameter of the rotor, and the centering rod Coaxial; the upper end of the race is perpendicular to the centering rod, and the heat treatment is the same as the tire.
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