Yes The inner diameter of the aluminum shell and the outer diameter of the spindle belong to interference fit and are coated. During assembly, the aluminum shell is evenly heated and expanded, and is equipped with a spindle interference heat sleeve. At present, the rapid increase in the output of aluminum-shell motors in the market has increased the demand for aluminum-shell heaters. Champion Electric produces aluminum shell heaters for motors. Aluminum shell motor is a motor with die-casting aluminum or stretched aluminum shell instead of traditional cast iron shell. This is due to the good ductility and low specific gravity of aluminum. However, because it is made of aluminum, the process requirements are high, the concentricity of the shell and the end cover is poor, the aluminum shell does not conduct the magnetic field, the frontal magnetic circuit of the motor is relatively saturated than that of the iron shell motor, and the electromagnetic wave is relatively large; These two characteristics lead to high noise of aluminum shell motor, and the process requirements for producing high-quality products are higher.