Ceramic ball bearings can be used rather than steel. Their larger hardness leads to lessen susceptibility to use. Ceramic bearings usually very last triple the life time of steel bearings. They deform less than steel under load, resulting in significantly less contact with the bearing retainer walls and reduce friction. https://thenytimes.co.uk/ai-kids-voice-over-generator-the-future-of-child-voiceovers/