Mechanical LossesHigh-Efficiency Bearings: Friction in bearings can be a significant source of loss. IE4 motors use bearings designed to have low friction, such as deep groove ball bearings or cylindrical roller bearings, which are properly sealed and lubricated to minimize losses.Aerodynamic Fan Design: The design of the cooling fan can have a large impact on losses. An aerodynamically optimized fan will consume less energy while providing adequate cooling.Precision Manufacturing: High-precision machining of all components, especially where there is relative motion (such as between the rotor and stator), reduces unwanted friction and vibration, which are sources of mechanical loss.