Wheel and pinion with helical gears

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Working model after Leonardo da Vinci, Codex Atlanticus (BAM), fol. 1103r

Durmast and metal; 55x70x80 cm

Built by: Nuova SARI, Florence, 1995

Istituto e Museo di Storia della Scienza, Florence

Leonardo points out that helical teeth last longer than ordinary ones because of their larger contact surface.

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