Regarding fans and magnetic pumps
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In centrifugal fans, some impellers are installed directly on the motor, while in others the motor is equipped with a bearing housing before the impeller is attached. Magnetic pump motors can have external magnets mounted directly on the motor, or they can have a motor with a bearing housing along with external magnets. What are the reasons and criteria?
Is the device’s power level determined?
Centrifugal pumps are equipped with bearing housings or gearboxes, primarily to balance the axial forces.