Re-construction of a Ball Bearing, based on a drawing by Da Vinci, in the Madrid Codex I. folio 20 v. His invention was the result of research linked to the yield optimisation of machines in motion, and the limitation of wear caused by friction. Leonardo designed this rolling contraption with perpetual motion, with evenly spaced bearings, which allowed an entire stage to rotate during a theatrical performance of Orpheus for Charles d'Amboise in Milan. Leonardo da Vinci (1452-1519), Italian artist and polymath

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Keywords: -construction, archival, archive, artist, ball, based, bearing, codex, da, drawing, engineering, friction, historical, history, italian, leonardo, machine, madrid, mechanics, motion, polymath, vinci