All motors have the capacity to wear out eventually. How quickly depends on the stress or the load placed on the motor. The Bio Shield disposer models are designed to be long lasting. The durability and performance increases through the model range. The Heavy Duty and Deluxe models have slightly bigger motors which generate more torque and cutting power. This puts less stress on the motor, giving the Bio Shield disposer longer life.
The use of permanent magnet motors in Bio Shield disposers is vital. The nature of the motor is that it increases torque as the load increases. This not only means top performance when a full load of food waste is being ground, but also prevents jams from occurring frequently.