Often due to prolonged use, the blade on the Rival food slicer can become dull or nicked, making it one of the most common parts to replaced on this appliance.
Such a slicer is capable of efficiently slicing 300,000 kilos of roots in twenty-four hours, the knives being changed four times in that period, or oftener if required, for it is necessary to change them the moment the slices show by their rough appearance that the knives are losing their cutting edges.