Online Exhibits > Leonardo and the Engineers of the Renaissance > Manuscripts > Madrid Ms. I

LEONARDO DA VINCI - Automatic screw-threading machines - Madrid Ms. I (BNM), fol. 91v


A later, simplified version of the screw-threading machine. Leonardo provides detailed drawings of two different dies. The first has a right-angled top and serves to thread the male screw, while the second has an acute angle top and serves to thread the female screw.

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