Wheel and pinion with helical teeth

Fausto Colombo, Giorgio Valentini, Giovanni Sacchi

1983

Modello basato sull’incastro di 2 ruote di diverse dimensioni, perpendicolari tra loro e dotate di dentatura inclinata.

In this design, Leonardo uses a pair of wheels with helical teeth to transmit motion between non-parallel shafts. In his notes on the drawing, he states that helical-profile teeth last longer than ordinary ones because their contact surface is greater. The system can also be used as a speed reducer.

Technical informations

Type of exhibit

Model

Collection

Anatomy of machines

Material

Swiss pine wood

Measures

Width: 75 cm, Length: 75 cm, Depth: 75 cm

Storage location

Palazzina Uzielli

Relationship with the original work

Source: Leonardo da Vinci, Codex Atlanticus, f. 1103 r

Inventory number

Object Record No.: 00000083

Location

Museo Leonardiano, Palazzina Uzielli, second floor

Digital archive

https://www.leonardodigitale.com/en/browse/Codex-atlanticus/1103-r/

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Last update: 22 September 2025, 12:08