In designing this lifting system, which employs an endless screw, Leonardo incorporated a ball bearing to reduce friction. Friction was indeed one of the major challenges faced by machine builders of the time, as it negatively affected both the functionality and the longevity of the machine.
The weight to be lifted is applied to the large vertical screw, which moves within an annular horizontal nut. When the nut is rotated by a crank, it forces the screw to rise along with the weight.
Technical informations
Type of exhibit
Model
Collection
Material
Wood, iron, rope
Measures
Width: 86.5 cm, Length: 49.5 cm, Depth: 28 cm
Storage location
Relationship with the original work
Source: Leonardo da Vinci, Madrid Codex I, f. 26 r
Inventory number
Object Record No.: 00000025
Location
Museo Leonardiano, Palazzina Uzielli, second floor
Digital archive
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Last update: 22 September 2025, 09:31